Method and system for automating steel bridge BIM 3D modeling

Abstract

The present invention relates to a method and system for automating BIM 3D modeling of steel bridges, wherein the method is a method for automating BIM 3D modeling of steel bridges performed by a BIM 3D modeling automation system for steel bridges, and may include: (a) a step of receiving basic bridge information including the bridge type, span configuration, girder row configuration, and girder cross-sectional shape of the steel bridge; (b) a step of receiving alignment information and uplift information of the road on which the steel bridge is installed; (c) a step of receiving location information of members included in the steel bridge; (d) a step of selecting one or more rules corresponding to at least some of the basic bridge information, alignment information, and location information from a pre-established rule database dedicated to steel bridges; and (e) a step of calculating the 3D coordinates of the members by linking the alignment information and the uplift information, and creating a BIM model by applying the selected rules.

Description

Technology Field

[0001] The present invention relates to a method and system for automating BIM 3D modeling of steel bridges. More specifically, for example, the present invention relates to a method and system for automating BIM 3D modeling of steel bridges that automatically generates a 3D BIM model at the LOD-400 level based on rules by receiving design data of a steel bridge. Background Technology

[0002] Recently, the mandatory implementation of BIM (Building Information Modeling) design in the construction sector has been expanding, and the demand for digital engineering is continuously increasing. Particularly in the steel bridge field, ensuring information consistency throughout the entire process of design, fabrication, and construction is required, leading to the emergence of a need for a BIM-based integrated information management system.

[0003] However, the current reality is that BIM modeling of steel bridges relies heavily on manual work by skilled engineers. Steel bridges, such as steel box girder bridges and plate girder bridges, contain numerous repetitive components like diaphragms, stiffeners, ribs, and bracing, which require significant time and cost for modeling. Furthermore, there is the burden of having to manually redraw the BIM model whenever design changes occur, and structural limitations exist due to the repetitive nature of the work.

[0004] Furthermore, in conventional manual-based BIM modeling methods, model quality can vary depending on the operator's skill level, and there is a possibility of errors such as omissions of components or inconsistencies between information. Since these issues can directly affect the fabrication quality and construction accuracy of steel bridges, it is necessary to ensure quality uniformity and minimize errors through the automation of the modeling process.

[0005] Meanwhile, steel bridges are installed under complex alignment conditions, such as the horizontal alignment, vertical alignment, and superelevation of roads, and camber must be taken into account during fabrication. Accordingly, it is important to accurately calculate the 3D coordinates of each member by linking alignment information and camber information and reflecting them in the BIM model; however, in conventional manual methods, this linking work has relied on manual calculation and input by engineers.

[0006] Furthermore, since steel bridge BIM models have different management units for the fabrication, transportation, and on-site installation phases, it is necessary to generate model elements by systematically classifying them into hierarchical structures such as assembly, transportation, and component units. However, conventionally, the creation of such hierarchical structures relied on manual work, which led to a problem of reduced management efficiency in large-scale projects. Prior art literature

[0007] Korean Registered Patent Publication No. 10-2648843 Korean Registered Patent Publication No. 10-2905083 The problem to be solved

[0008] The present invention aims to solve the problems of the aforementioned conventional technology by providing a method and system for automating steel bridge BIM 3D modeling that can automatically generate a BIM model based on a rule database dedicated to steel bridges by receiving basic bridge information, alignment information, rise amount information, and location information of members of a steel bridge.

[0009] In addition, the present invention aims to provide an automated method and system for steel bridge BIM 3D modeling that can calculate the 3D coordinates of members by linking linear information and uplift information, and generate a BIM model that accurately reflects the complex linear conditions of the steel bridge based on the calculated coordinates.

[0010] In addition, the present invention aims to provide an automated method and system for steel bridge BIM 3D modeling that enables systematic management during the fabrication, transportation, and installation stages of steel bridges by creating BIM model elements by classifying them into a hierarchical structure including assembly units, transportation units, and member units.

[0011] In addition, the present invention aims to provide a method and system for automating steel bridge BIM 3D modeling that can automatically regenerate a BIM model by re-selecting rules corresponding to the changed information when a design change occurs.

[0012] In addition, the present invention aims to provide a method and system for automating steel bridge BIM 3D modeling that can automatically generate quantity calculation and verification reports based on the generated BIM model.

[0013] However, the technical problems that the embodiments of the present invention aim to solve are not limited to the technical problems described above, and other technical problems may exist. means of solving the problem

[0014] As a technical means for achieving the above-mentioned technical task, the method for automating steel bridge BIM 3D modeling according to the first aspect of the present invention is a method for automating steel bridge BIM 3D modeling performed by a steel bridge BIM 3D modeling automation system, comprising: (a) receiving basic bridge information including the bridge type, span configuration, girder row configuration, and girder cross-sectional shape of the steel bridge; (b) receiving alignment information and uplift information of the road on which the steel bridge is installed; (c) receiving location information of members included in the steel bridge; (d) selecting one or more rules corresponding to at least some of the basic bridge information, alignment information, and location information from a pre-established rule database dedicated to steel bridges; and (e) calculating the three-dimensional coordinates of the members by linking the alignment information and the uplift information, and creating a BIM model by applying the selected rule, wherein the elements of the BIM model may be created by classifying them into a hierarchical structure including assembly units, transport units, and member units.

[0015] In addition, the above-mentioned steel bridge-specific rule database may include a four-category rule system comprising: a first rule including a rule for generating a basic shape for each bridge type; a second rule including a rule for calculating the shape / dimensions of a girder cross-section according to design conditions including span length and bridge width, and conditions for thickness change according to the position of plate members included in the girder within the span; a third rule including rules for the spacing and pattern of the members; and a fourth rule including rules for generating details considering the shape of connections including bolted connections and welded connections, and fabrication and constructability.

[0016] Additionally, the above step (d) may include a rule conflict resolution procedure that resolves the mutual conflict according to a predefined priority criterion when a mutual conflict occurs among at least some of the multiple rules selected from the steel bridge-specific rule database.

[0017] Additionally, the mutual collision may include mutual collision in the form of physical interference, and the priority criteria may include a predefined interference resolution criterion for adjusting to resolve the physical interference according to the type and form of interference of the members in which the physical interference occurred, and the predefined interference resolution criterion may include a criterion set to apply at least one of relocation and specification change for resolving the physical interference to at least one member that has relatively less impact on structural safety when adjusting to resolve the physical interference.

[0018] In addition, the above priority criteria may include a condition-based criterion in which a special rule applied when a predetermined condition is met takes precedence over a general rule applied even when the predetermined condition is not met.

[0019] In addition, the above priority criteria may include source-based criteria in which, depending on the source of the rule, rules based on design guidelines or specifications take precedence over rules based on internal standards, and rules based on internal standards take precedence over rules based on manufacturing practices.

[0020] Additionally, the above-mentioned linear information may include planar linear information, longitudinal linear information, and superelevation information; the above-mentioned planar linear information may include shape information of straight sections, circular curve sections, and transition curve sections; the above-mentioned longitudinal linear information may include shape information of straight sections, circular curve sections, and longitudinal curve sections; and the above-mentioned superelevation information may include superelevation angle information at the starting and ending points of the steel bridge.

[0021] In addition, the above-mentioned rise amount information may be configured to receive rise amount values ​​from the design documents for each diaphragm location of the steel bridge or a specific point designated by the user, while additionally receiving a surcharge rise amount according to the manufacturer's needs.

[0022] In addition, step (e) can calculate the reference point coordinates of each of the structural members among the members based on the linear information when calculating the three-dimensional coordinates, and calculate the final three-dimensional coordinates by reflecting the uplift amount information in the reference point coordinates.

[0023] In addition, the above hierarchical structure may be configured as a tree structure in which the assembly unit at the top level includes a plurality of transport units, and each transport unit includes a plurality of component units, and an identification number of the corresponding level may be automatically assigned to the elements of each level.

[0024] In addition, in step (e) above, the BIM model may be generated to include not only the members for which location information was entered in step (c), but also joining members and detailed members added by applying the rule selected in step (d).

[0025] In addition, the above method for automating BIM 3D modeling of steel bridges may further include (f) a step of automatically generating a verification report based on the BIM model after step (e), and the verification report may include at least one of a review of the support shoe position coordinates, a review of the support shoe height, a review of the support underpass space, a list of weights and volumes per transport unit, and a review of jack-up reinforcement and substructure.

[0026] In addition, the above method for automating steel bridge BIM 3D modeling can automatically regenerate the BIM model by re-selecting a rule corresponding to the changed information in step (d) and applying the re-selected rule in step (e) when at least one of the bridge basic information, alignment information, uplift information, or location information entered in steps (a) to (c) is changed.

[0027] As a technical means for achieving the above-mentioned technical task, the steel bridge BIM 3D modeling automation system according to the second aspect of the present invention comprises: an input unit that receives basic bridge information including the bridge type, span configuration, girder row configuration, and girder cross-sectional shape of the steel bridge, alignment information and uplift information of the road on which the steel bridge is installed, and location information of members included in the steel bridge; a steel bridge-specific rule database that stores rules classified by the type of steel bridge and member type; and a model generation engine that selects one or more rules corresponding to the information received from the input unit from the rule database, calculates the 3D coordinates of the members by linking the alignment information and the uplift information, and generates a BIM model by applying the selected rules, wherein the model generation engine can generate the elements of the BIM model by classifying them into a hierarchical structure including assembly units, transport units, and member units.

[0028] In addition, the present invention may provide a computer program that performs the above method when executed on a computer.

[0029] The means for solving the problem described above are merely exemplary and should not be interpreted as intended to limit the present invention. In addition to the exemplary embodiments described above, additional embodiments may exist in the drawings and the detailed description of the invention. Effects of the invention

[0030] According to at least one of the means for solving the problem of the present invention described above, by receiving basic bridge information, alignment information, uplift information, and location information of members of a steel bridge, and by selecting a rule corresponding to the input information from a pre-established rule database dedicated to steel bridges to automatically generate a BIM model, the steel bridge BIM modeling work that relied on conventional manual work can be converted to rule-based automation, thereby reducing the time required for modeling and improving productivity.

[0031] In addition, according to at least one of the means for solving the problem of the present invention described above, a rule database dedicated to steel bridges is composed of a four-category rule system including shape generation rules, section and dimension rules, repeating member placement rules, and connection and detail rules, and is managed separately by bridge type and member type, thereby allowing design guidelines, specifications, internal standards, and manufacturing practices specialized for the steel bridge domain to be systematically standardized, and enabling the creation of BIM models of uniform quality without relying on the skill level of the workers.

[0032] In addition, according to at least one of the means for solving the problem of the present invention described above, a rule conflict resolution procedure is included to resolve conflicts according to predefined priority criteria when conflicts occur between a plurality of selected rules, thereby enabling automatic appropriate adjustment even in rule conflict situations such as physical interference, so as to minimize interference between members or design errors.

[0033] In addition, according to at least one of the means for solving the problem of the present invention described above, by calculating the reference point coordinates of each structural member among the members based on linear information and reflecting the uplift amount information in the reference point coordinates to calculate the final 3D coordinates, a BIM model can be generated based on an accurate coordinate system linked with the planar alignment, longitudinal alignment, and superelevation of the road and the uplift amount during manufacturing, thereby improving the manufacturing precision of the steel bridge.

[0034] In addition, according to at least one of the means for solving the problem of the present invention described above, elements of a BIM model are generated by being classified into a hierarchical structure (tree structure) including assembly units, transportation units, and member units, and identification numbers are automatically assigned to the elements of each hierarchy, thereby enabling the systematic tracking and management of each unit during the fabrication, transportation, and on-site installation processes of steel bridges.

[0035] In addition, according to at least one of the means for solving the problem of the present invention described above, when at least one of the bridge basic information, alignment information, rise amount information, or location information is changed, a rule corresponding to the changed information can be re-selected and the BIM model can be automatically regenerated, thereby relieving the burden of having to manually rewrite the BIM model whenever a design change occurs and reducing the time required to respond to design changes.

[0036] In addition, according to at least one of the aforementioned means for solving the problem of the present invention, a verification report including a review of the support shoe position coordinates, a review of the support shoe height, a review of the support clearance space, a list of weights and volumes per transport unit, and a review of jack-up reinforcement and substructure is automatically generated based on a BIM model, thereby having the effect of detecting errors that may occur during steel bridge fabrication in advance and reviewing mismatches during steel bridge installation in advance.

[0037] In addition, according to at least one of the means for solving the problem of the present invention described above, not only the members corresponding to the location information entered by the user but also the connecting members and detailed members added by the application of selected rules are automatically generated together, so that if the user defines only the location of the main structural member, the remaining connecting and detailed members can be automatically completed by the rules, thereby improving the efficiency of the modeling work and reducing dependence on a specific engineer.

[0038] However, the effects obtainable from this invention are not limited to those described above, and other effects may exist. Brief explanation of the drawing

[0039] FIG. 1 is a flowchart illustrating a method for automating steel bridge BIM 3D modeling according to one embodiment of the present invention. FIG. 2 is a block diagram illustrating a steel bridge BIM 3D modeling automation system according to one embodiment of the present invention. FIG. 3 is a conceptual diagram showing the operating environment of a steel bridge BIM 3D modeling automation system according to one embodiment of the present invention. FIG. 4 is a drawing for explaining the configuration and operation of a steel bridge BIM 3D modeling automation system according to one embodiment of the present invention. FIG. 5 is a drawing illustrating the function and operation flow of a steel bridge BIM 3D modeling automation system according to one embodiment of the present invention. FIG. 6 is an example of a bridge basic information input screen according to one embodiment of the present invention (a steel bridge span length and cross-sectional shape definition screen). FIG. 7 is an example diagram of a linear information input screen according to one embodiment of the present invention. FIG. 8 is an example diagram of a screen for inputting uplift amount information according to one embodiment of the present invention. FIG. 9 is an example diagram of a position information input screen for members according to one embodiment of the present invention (structural element position definition screen). FIG. 10 is an example of a BIM model at the LOD-400 level created according to one embodiment of the present invention. FIG. 11 is an example diagram of a point part shoe position coordinate review sheet generated according to one embodiment of the present invention. FIG. 12 is an example diagram of a branch shoe height review sheet created according to one embodiment of the present invention. FIG. 13 is an example of a review of the underside space of a branch section generated according to one embodiment of the present invention. FIG. 14 is an example of a list of weights and volumes per transport unit generated according to one embodiment of the present invention. FIG. 15 is an exemplary diagram showing the overall characteristics and aerial view of a steel bridge of a BIM model created according to one embodiment of the present invention. FIG. 16 is an example diagram showing an aerial view of a steel bridge of a BIM model created according to one embodiment of the present invention. FIG. 17 is an example diagram showing a bottom view of a steel bridge of a BIM model created according to one embodiment of the present invention. FIG. 18 is an example diagram showing an internal navigation view of a branch section of a BIM model created according to one embodiment of the present invention. FIG. 19 is an example diagram showing girder views and attribute information of a BIM model created according to one embodiment of the present invention. FIG. 20 is an example diagram showing girder main web view and attribute information of a BIM model created according to one embodiment of the present invention. FIG. 21 is an example diagram showing a view of the under-span space of a steel bridge support section of a BIM model created according to one embodiment of the present invention. Specific details for implementing the invention

[0040] Embodiments of the present invention are described below with reference to the attached drawings to enable those skilled in the art to easily implement the invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification have been given similar reference numerals. Additionally, in the drawings illustrating the embodiments of the present invention, the size or proportion of components may be exaggerated for clarity of explanation.

[0041] Throughout this specification, when a part is described as being "connected" to another part, this includes not only cases where they are "directly connected," but also cases where they are "indirectly connected," "electrically connected," "communicationally connected," or "connected via data flow" with other elements interposed between them.

[0042] Throughout the entire specification, when a component is described as being located "on," "on top," "on top," "under," "on bottom," or "on bottom" of another component, this includes not only cases where the component is in contact with the other component but also cases where another component exists between the two components.

[0043] Throughout this specification, when a part is described as "comprising" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0044] The present invention relates to a method and system for automating BIM 3D modeling of steel bridges. More specifically, the present invention relates to a method and system for automating BIM 3D modeling of steel bridges that receives design data of a steel bridge and automatically generates a 3D BIM model at the LOD-400 level based on rules. For example, the present invention can be applied to steel bridge types such as steel box girder bridges and plate girder bridges, but is not limited thereto; it can, of course, be widely applied to various steel bridge types to which the present invention is applicable.

[0045] FIG. 1 is a flowchart illustrating a method for automating steel bridge BIM 3D modeling according to one embodiment of the present invention, and FIG. 2 is a block diagram illustrating a system for automating steel bridge BIM 3D modeling according to one embodiment of the present invention.

[0046] Hereinafter, a method for automating steel bridge BIM 3D modeling according to one embodiment of the present invention (hereinafter referred to as "the present method") will be described with reference to the flowchart of FIG. 1. For reference, since the present method utilizes the steel bridge BIM 3D modeling automation system according to one embodiment of the present invention (hereinafter referred to as "the present system") to be described later, each step of the present method and the configuration of the present system performing the same will be explained in parallel as necessary, with reference to the operation flowchart of FIG. 1 and the block diagram of FIG. 2.

[0047] The present method (S100) is an automated method for BIM 3D modeling of a steel bridge performed by the present system (100). The present method (S100) relates to a series of procedures for automatically generating a 3D BIM model at the LOD-400 level by receiving design data of a steel bridge.

[0048] Referring to FIG. 1, the present method (S100) includes steps S110, S120, S130, S140, and S150.

[0049] Also, referring to FIG. 2, the system (100) includes an input unit (110), a steel bridge-specific rule database (120), and a model generation engine (130).

[0050] The input unit (110) is configured to receive basic bridge information including the bridge type, span configuration, girder row configuration, and girder cross-sectional shape of the steel bridge, alignment information and uplift amount information of the road where the steel bridge is installed, and location information of members included in the steel bridge. Steps S110 to S130 of the present method (S100) can be performed by this input unit (110).

[0051] The steel bridge-specific rule database (120) is configured to store rules classified by type and member type of the steel bridge and can be associated with step S140.

[0052] The model generation engine (130) is configured to select one or more rules corresponding to information received from the input unit (110) from the steel bridge-specific rule database (120), calculate three-dimensional coordinates of members by linking linear information and uplift information, and generate a BIM model by applying the selected rules. The model generation engine (130) generates the elements of the BIM model by classifying them into a hierarchical structure including assembly units, transport units, and member units. Steps S140 and S150 of the present method (S100) can be performed by this model generation engine (130).

[0053] Additionally, the system (100) may include a report generation unit (140) that automatically generates quantity calculation information and a verification report based on a BIM model. Step S160, which will be described later, can be performed by this report generation unit (140).

[0054] FIG. 3 is a conceptual diagram illustrating the operating environment of a steel bridge BIM 3D modeling automation system according to one embodiment of the present invention. Referring to FIG. 3, the present invention (100) can establish an environment in which multiple BIM users can operate the system simultaneously by using a cloud server that is not restricted by location. Each BIM user can access the steel bridge database to query or update rules in the steel bridge-specific rule database (120) and can generate a BIM model at the LOD-400 level by linking with Tekla Structures. However, multi-user operation through a cloud server is not limited to the essential configuration of the present invention, and the system can also be operated in a single-user local environment.

[0055] FIG. 4 is a diagram illustrating the configuration and operation of a steel bridge BIM 3D modeling automation system according to one embodiment of the present invention. Referring to FIG. 4, the operations performed by the steel bridge BIM automatic modeling system (100) can be broadly divided into four categories: 1. Lines, 2. Member, 3. Modeling, and 4. Reporting. The 1. Lines block corresponds to a part of the input section (110) and may include 1.1. Bridge Properties (including Steel Bridge General and Steel Bridge Member) and 1.2. Bridge Lines (including Plan / Elev / Transv. Lines, Hunch, Camber, and Shoe Location). The 2. Member block corresponds to another part of the input section (110) and may include 2.1. Structure Member (including Girder / Etc Splice, Cross Beam / Wing Beam, Stringer, Horizontal Brace, and BIM Modeling Rule). 3. The Modeling block corresponds to the model generation engine (130) and may include 3.1. LOD-400 BIM (Tekla). 4. The Reporting block corresponds to the report generation unit (140) and may include 4.1. an interference review sheet (e.g., a review sheet of shoe position coordinates and a review sheet of shoe height), 4.2. a list of weights and volumes per transport unit, 4.3. a Shoe Verification Sheet, and 4.4. a review sheet of jack-up reinforcement and substructure.

[0056] FIG. 5 is a diagram illustrating the function and operation flow of a steel bridge BIM 3D modeling automation system according to one embodiment of the present invention. Referring to FIG. 5, the overall processing flow of the system (100) can proceed in the order of Define Bridge → Define Bridge Lines → Define Bridge Member → Define BIM Modeling Rule → Reporting / Create BIM Model. At each step, visual verification of input data in real time can be performed through a 2D viewer. As output, verification reports such as interference review reports, information by transport unit, shoe coordinates and height review, and substructure review reports, as well as a BIM Model, can be generated.

[0057] Meanwhile, referring to Fig. 1, step S110 is a step of receiving basic bridge information including the bridge type, span configuration, girder row configuration, and girder cross-sectional shape of the steel bridge.

[0058] FIG. 6 is an example of a bridge basic information input screen (steel bridge span length and cross-sectional shape definition screen) according to one embodiment of the present invention. Referring to FIG. 6, in step S110, the input unit (110) can receive bridge basic information from a user, including the bridge type of the steel bridge (e.g., steel box girder bridge, plate girder bridge, etc.), span configuration (number of spans and span length), girder column configuration (e.g., two-column type, multi-column type, etc.), and girder cross-sectional shape.

[0059] Basic bridge information may include at least some of the following: construction name, bridge name, number of girder rows, number of abutments, span length per abutment (span length or span length of each span), whether the girder has a haunch, whether there is a cross beam, whether there is a stringer, whether there is a skew and the angle of skew, the shape of the entry section, the shape of the cut section, and the shape of the end section of the cross section, the distance to the plate section, the distance to the construction section, the step difference, the distance to the slab, the distance to the steel, and the distance to the shoe.

[0060] As illustrated in Fig. 6, input fields such as the project name, bridge name, and project management number may be placed at the top of the Bridge Properties input screen. In the central section, the number of girder rows, the span width of the bridge (width per span), the total length of the bridge, and the starting point may be entered. Additionally, for each girder name (EB, G1, G2, ..., G19, EB), the spacing, the presence or absence of CB / WB (cross beam / wing beam), and the presence or absence of STR / EB (stringer / end beam) may be specified in the form of checkboxes. In the lower section, the starting point, total length of the girder, number of piers, number of boxes, number of DIAPHs, whether it is an skewed girder, whether it is a haunch girder, upper wind point, lower wind point, and web weld number may be entered. On the right, the cross-sectional shape is visually displayed, and for each of the entry shape, cut section shape, and end point shape, the distance to the receiving section, distance to the construction section, step difference, distance to the SLAB, distance to the STEEL, distance to the SHOE, etc., can be entered. In addition, the skew angle (start section, end point), web inclination angle (up, down), and whether to fix can be set.

[0061] Also, referring to Fig. 1, step S120 is a step of receiving alignment information and uplift amount information of the road where the steel bridge is installed.

[0062] FIG. 7 is an example diagram of a linear information input screen according to one embodiment of the present invention. Referring to FIG. 7, in step S120, the input unit (110) can receive linear information of a road on which a steel bridge is installed. The linear information may include data for defining the planar alignment, longitudinal alignment, and superelevation alignment of the road center.

[0063] As illustrated in FIG. 7, the linear information input screen (Bridge Lines) is equipped with tabs for planar alignment, longitudinal alignment, and superelevation, allowing for the separate input of each linear data. On the right side of the screen, selection (origin, endpoint, center, intersection, center, periphery, side) and scale (free, vertical, horizontal) settings may be provided. At the bottom of the screen, input tools for linear elements such as Point, Line, Arc, Clo (clothoid), and CoA, as well as editing tools such as Move, Length, Comp, QH, Movi, X Hori, Vert, Align, and Delete, may be provided. Additionally, function buttons such as NewType, DrawCurve, Import from ACAD, Store, and Close may be placed.

[0064] Additionally, the linear information may include planar linear information, longitudinal linear information, and superelevation information. The planar linear information may include shape information for straight sections, circular curve sections, and transition curve sections. The transition curve may include a clothoid or a cubic parabola shape. A clothoid is a curve in which the product of the radius of curvature (R) and the length of curvature (L) at any point on the curve is constant, where RL = A 2 It can be expressed by the formula, and generally, the range of A can be R / 3 ≤ A ≤ R. The cubic parabola is mainly used in railway alignments, where Y = ax 3It can be expressed by the formula. In addition, the vertical alignment information may include shape information for straight sections, circular curve sections, and vertical curve sections. A vertical curve is a section installed between two different vertical gradient sections to mitigate impact and ensure sight distance during road driving, and the transition length (L) of the vertical curve is L = (m - n) / 360 × V 2 It can be defined by the formula (where L is the vertical curve length, m is the first gradient (%), n is the second gradient (%), and V is the driving speed (km / hr)). In addition, the superelevation information may include superelevation angle information at the starting and ending points of the steel bridge.

[0065] FIG. 8 is an example diagram of a screen for inputting uplift amount information according to one embodiment of the present invention.

[0066] Referring to FIG. 8, at step S120, the input unit (110) may receive uplift information. The uplift information may include data for defining the uplift amount (camber) that must be reflected during the fabrication of the steel bridge. The uplift information may be configured to receive uplift values ​​from the design documents for each diaphragm position of the steel bridge or a specific point designated by the user, while additionally receiving an additional uplift amount according to the manufacturer's needs. Here, the additional uplift amount may refer to a margin uplift amount that the manufacturer additionally grants based on its own experience or judgment to the theoretical uplift amount provided in the detailed design documents, thereby compensating for uncertainty during the fabrication and construction process.

[0067] As shown in Fig. 8, on the uplift input screen, the design uplift, pre-composite uplift, post-composite uplift, concrete site uplift, and total can be visualized and displayed in the form of graphs and tables for each diaphragm point (DP01, DP02, ... etc.). At the top of the graph, a legend including design uplift, pre-composite uplift, post-composite uplift, concrete site uplift, and total, as well as uplift curves for each girder (Elt1, Elt2, Elt3, Elt4), can be displayed. At the bottom of the screen, function buttons such as girder selection, start clearance (m), additional increase, additional increase calculation, import from ACAD, material plot, save, and close can be placed. The user can import uplift data from ACAD or input additional surcharge uplift.

[0068] Also, referring to Fig. 1, step S130 is a step of receiving location information of members included in the steel bridge.

[0069] FIG. 9 is an example diagram of a position information input screen for members according to one embodiment of the present invention (structural element position definition screen).

[0070] Referring to FIG. 9, at step S130, the input unit (110) can receive location information of members included in the steel bridge. The location information of the members may include at least one of the following: information regarding the thermal configuration and arrangement of the girder, the shape and installation location of the cross beam and stringer, the location of the diaphragm, the spacing and installation location of the longitudinal rib, the spacing and installation location of the horizontal rib, the installation location of the horizontal brace, the location of the field splice, and the location of the shop welding joint.

[0071] As illustrated in FIG. 9, in the structural element location definition screen, a girder name (e.g., Base Girder - G4) is selected, and a plan view of the steel bridge can be displayed at the top of the screen, a side view at the center, and a cross-section view at the bottom. Parameters such as the girder name, plate thickness, K.Factor, and FootSize can be entered at the bottom left of the screen, and items such as side wall, transverse section, end section, upper section, and upper separation plate can be set. Additionally, structural elements such as diaphragm position, vertical rib position, CORS (cross beam), and SHOE can be visually arranged, and function buttons such as Edit with Excel, Copy GirderINFO, Store, and Exit can be placed.

[0072] In step S130, the position information of the input members can be calculated in real time according to the linear information input in step S120 and displayed in a 2D viewer, and can be provided so that the user can visually verify the suitability of the position information through the 2D viewer.

[0073] In addition, at least one of steps S110, S120, and S130 may include a function to automatically read information from design documents through an Application Programming Interface (API) of CAD software. For example, linear information, cross-sectional information, or member location information included in the detailed design drawings may be automatically read through an API of ACAD software and transmitted to the input unit (110).

[0074] Also, referring to FIG. 1, step S140 is a step of selecting one or more rules corresponding to at least some of the bridge basic information, alignment information and location information from a pre-established steel bridge-specific rule database (120).

[0075] In step S140, the model generation engine (130) may select one or more rules corresponding to bridge basic information, alignment information, and location information from a pre-established steel bridge-specific rule database (120). The steel bridge-specific rule database (120) may store design guidelines, specifications, internal standards, and manufacturing practices for steel bridge details as formalized explicit rules.

[0076] The steel bridge dedicated rule database (120) may include a four-category rule system comprising a first rule including a rule for generating a basic shape for each bridge type, a second rule including a rule for calculating the shape / dimension of a girder cross-section according to design conditions including a thickness change condition according to the position of a plate member included in the girder within the span and a span length and bridge width, a third rule including a rule for the spacing and pattern of members, and a fourth rule including a rule for generating a shape of a connection including bolted connections and welded connections, and a rule for generating details considering fabrication and constructability.

[0077] The first rule may include rules for generating basic shapes for each bridge type. For example, the first rule may include rules for generating the basic shape of a box girder based on the number of spans, girder spacing, and cross-section arrangement criteria in the case of a steel box girder bridge, and rules for generating the basic shape of an I-shaped cross section in the case of a plate girder bridge.

[0078] Rule 2 may include rules for calculating the shape and dimensions of the girder cross-section according to design conditions, including span length and bridge width, and conditions for thickness variation according to the position within the span of the plate member included in the girder. For example, conditions for plate thickness variation according to stress conditions at different positions within the span may be formalized as rules, such as increasing the thickness of the lower flange due to positive moment at the center of the span and increasing the thickness of the upper flange due to negative moment near the support points.

[0079] The third rule may include rules regarding the spacing and pattern of the members. For example, for repeating members such as diaphragms, stiffeners, ribs, and bracing, the spacing and pattern according to span conditions may be defined as rules. Here, "pattern" may refer to a regular arrangement form in which repeating members are placed, and may include, for example, an equal spacing pattern in which diaphragms are placed at equal intervals within the span, a variable spacing pattern in which the spacing narrows near the support points and widens in the center of the span, or a concentrated placement pattern in which they are concentrated at specific locations (field joints, pier tops, etc.).

[0080] The fourth rule may include shape rules for connections including bolted connections and welded connections, as well as detailed generation rules considering fabrication and constructability. For example, for bolted connections in field joints, the size of the splice plate, bolt arrangement pattern, gauge and pitch spacing, etc., may be standardized by rules, and for factory welded connections, the welding type (butt welding, fillet welding, etc.) and welding details (scallop shape, overhang, etc.) may be standardized by rules. In the case of bolted connections, the standard center spacing and minimum edge distance (gauge) are specified according to the bolt designation in the Standard Specifications for Road Bridges (Korean Society of Civil Engineers). If the designer's input does not conform to these, a warning may be sent at the input stage, and the designer may be guided to apply values ​​according to the rules of the database (120).

[0081] These four-category rule systems can be managed separately by bridge type and member type. Here, classification by member type may mean classifying rules according to the structural role and form of the member, such as girder type, cross beam type, diaphragm type, bracing type, stiffener type, etc. Through this, different sets of rules can be applied depending on the member type even within the same bridge type.

[0082] Additionally, step S140 may include a rule conflict resolution procedure that resolves conflicts according to a predefined priority criterion when at least some of the multiple rules selected from the steel bridge-specific rule database (120) conflict with each other. For example, when installing horizontal reinforcement in a single layer according to the Road Bridge Standard Specifications (Korean Society of Civil Engineers), a conflict may occur between the first rule to install at a position of 0.2H of the web height (H) and the second rule to install horizontal reinforcement at a distance of 35mm from the adjacent vertical reinforcement. Since the second rule cannot be observed if the vertical reinforcement cross-section has a T-shaped flange plate, the second rule is ignored according to a predefined criterion in the database (120), and the length of the horizontal reinforcement is adjusted so that no conflict occurs between the members.

[0083] Here, mutual conflict may mean a situation in which multiple rules specify different shapes, dimensions, or arrangements for the same member or the same location. For example, a case in which the repeating member arrangement spacing according to the third rule and the joint detail according to the fourth rule physically overlap at the same location may constitute a mutual conflict.

[0084] Such mutual collisions may include mutual collisions in the form of physical interference. Physical interference refers to a situation in which, during the BIM model creation process, multiple members overlap in three-dimensional space or come within a distance smaller than the allowable gap, making fabrication or construction impossible.

[0085] Additionally, the above priority criteria may include predefined interference resolution criteria to adjust for the resolution of physical interference according to the types of members where physical interference has occurred and the form of interference. In this case, the predefined interference resolution criteria may include criteria set to apply at least one of relocation and specification change for the resolution of physical interference to at least one member that has relatively less impact on structural safety during the adjustment for the resolution of physical interference.

[0086] In addition, positional relocation or specification changes based on interference resolution criteria may be configured to be performed within a range that prevents structural safety from being further reduced as a result of such relocation or change. For example, if a vertical stiffener attached to a support diaphragm interferes with a longitudinal rib passing through the support, the design guidelines for detailed sections of steel bridges stipulate that the separation distance between the two members must exceed 3 / 2 of the longitudinal rib width; therefore, the longitudinal rib can be automatically moved to be bent and welded to the vertical stiffener in accordance with the interference resolution criteria. At this time, the relocation can be performed within a range where the gap between the moved longitudinal rib and an adjacent longitudinal rib does not exceed the allowable range specified in the design criteria. As another example, if the width of the vertical stiffener physically interferes with the gusset plate of the horizontal brace at the connection point between the vertical stiffener (stiffener) inside the girder and the horizontal brace, a slot hole can be constructed in the gusset plate to allow the vertical stiffener to pass through, in accordance with the interference resolution criteria.

[0087] In addition, the aforementioned priority criteria may include condition-based criteria in which special rules applied when certain conditions are met take precedence over general rules applied even when certain conditions are not met. Here, condition-based criteria may refer to standards established so that special rules take precedence when special rules applied only when specific design conditions are met conflict with general rules applied regardless of such conditions. For example, in a curved bridge section where the radius of curvature of a steel bridge is below a certain standard value, diaphragm placement rules specific to curved bridges (special rules) may take precedence over diaphragm placement rules applied to straight bridge sections (general rules). As another example, if the seismic design grade is above a certain grade, seismic reinforcement detail rules (special rules) may take precedence over general connection detail rules (general rules).

[0088] In addition, the above priority criteria may include source-based criteria, in which rules based on design guidelines or specifications take precedence over rules based on internal standards, and rules based on internal standards take precedence over rules based on manufacturing practices, depending on the source of the rules. Here, source-based criteria may refer to criteria that assign priority based on the authority of the source from which the rules originated. The rules stored in the steel bridge-specific rule database (120) may be classified by source into rules based on public standards, such as design guidelines or specifications for steel bridge details, rules based on internal standards, and rules based on manufacturing practices. In this case, rules based on design guidelines or specifications may be applied with the highest priority as they have the highest legal and technical binding force, rules based on internal standards may be applied next, and rules based on manufacturing practices may be applied with the lowest priority. For example, if the value specified in the design guidelines and the value specified in the internal standards differ regarding the minimum thickness of the stiffener, the value in the design guidelines may be applied first. However, if the value specified in the internal standard is safer than the value specified in the design guidelines, the value specified in the internal standard may be applied exceptionally after review. In other words, while the principle of source-based rules is generally followed, exceptions where the safer value takes precedence may also be considered in certain cases.

[0089] Additionally, step S140 may include a rule conformity verification procedure to pre-verify whether the selected rules are suitable for the input bridge basic information, alignment information, and location information prior to the BIM model generation in step S150. The rule conformity verification procedure may verify at least one of the following: whether all input parameters required by the selected rules are satisfied, whether the current input data is included within the scope of application of the selected rules (e.g., applicable span length range, bridge width range, etc.), and whether the interdependence between the selected rules is satisfied (e.g., a relationship where the result of applying one rule is required as input for another rule, such as when the girder cross-section dimension calculated by the second rule is required as a prerequisite for calculating the member placement spacing of the third rule). If non-conformities are detected during the rule conformity verification procedure, the model generation engine (130) may notify the user of the details of the non-conformities and request the user's confirmation or correction of the input data. Through this, errors discovered after BIM model generation can be prevented in advance, thereby improving the reliability of the modeling work.

[0090] Additionally, the steel bridge-specific rule database (120) can manage version information and change history for each of the stored rules. The model generation engine (130) can record version information of the rules applied when creating a BIM model as metadata for the BIM model, and through this, when the rules are updated in the future, it can compare the difference between the rule version applied to the existing BIM model and the current rule version, and automatically identify the members affected by the rule change. For example, if the minimum stiffener thickness rule is updated according to the revision of design guidelines, the model generation engine (130) can compare the rule version applied to the existing project's BIM model with the updated rule version to automatically identify the stiffener members affected by the rule and notify the user. This rule version management function can contribute to efficiently managing the consistency of the existing project's BIM model following rule updates in an environment where the same rule database is shared and used by multiple projects.

[0091] In addition, referring to Fig. 1, step S150 is a step of calculating the three-dimensional coordinates of members by linking linear information and uplift information, and creating a BIM model by applying selected rules.

[0092] In step S150, the model generation engine (130) can calculate the three-dimensional coordinates of the members by linking linear information and uplift information, and can generate a BIM model by applying a selected rule. In calculating the three-dimensional coordinates, step S150 can calculate the reference point coordinates of each structural member among the members based on linear information, and calculate the final three-dimensional coordinates by reflecting the uplift information in the reference point coordinates.

[0093] For reference, in this document, a structural member refers to a member for which shear and bending stress analysis is required when performing structural analysis, and may include, for example, girders, cross beams, wing beams, stringers, horizontal braces, etc., and is distinguished from reinforcing and detailed members such as stiffeners and connecting plates. Since the scope of such structural members is obvious to a person skilled in the art, a more detailed explanation is omitted.

[0094] In addition, a reference point may refer to a point where a girder line (longitudinal reference line) intersects a transverse reference line such as a diaphragm or a field joint, but is not limited to this. The planar coordinates of the reference point can be calculated from the planar alignment information of the road centerline, and the height (elevation) of the reference point can be calculated from the longitudinal alignment information and superelevation information.

[0095] In addition, the reflection of uplift amount information may mean determining the final 3D coordinates of the manufacturing standard by adding the uplift value assigned to the point in the height direction to the reference point coordinates (design alignment reference coordinates) calculated solely from linear information.

[0096] In addition, the coordinates of reinforcing and detailed members (e.g., stiffeners, connecting plates, ribs, etc.) can be determined relative to the reference point coordinates of the structural member, and accordingly, in step S150, the reference point coordinates of the structural member are calculated first, and then the coordinates of the reinforcing and detailed members can be derived.

[0097] Additionally, the BIM model can be created by calling the Open API of the BIM software, and attribute information at the LOD-400 (Level of Development 400) level, including part number, material, specification, weight, and profile information, can be automatically assigned to each element of the part unit. Here, LOD-400 refers to a level of development in which each element of the BIM model includes detailed information (accurate shape, dimensions, material, connection details, etc. of the part) required for actual production. The Open API of the BIM software may be the Open API of Tekla Structures, and the BIM model can be created in the Tekla Structures environment. Additionally, the model creation engine (130) can implement repeating parts and connection details in the form of parametric components by utilizing the Custom Component function provided by the BIM software, thereby allowing the shape of the related part to be automatically updated by simply changing the parameter values ​​of the component when the design is changed. Here, "parametric" may refer to a method in which the shape and dimensions of a member are defined as variables (parameters) rather than fixed values, and the shape is automatically updated according to changes in parameter values. However, the open API of BIM software is not limited to Tekla Structures' OpenAPI and may include APIs of other BIM software capable of outputting open BIM data based on IFC (Industry Foundation Classes).

[0098] In step S150, the BIM model can be created to include not only the members for which location information was entered in step S130, but also connecting members and detailed members added by applying the rule selected in step S140. Here, connecting members may refer to members used for joining members, such as splice plates, bolts, and gusset plates at field joints, and detailed members may refer to members added for local reinforcement or fabrication details of structural members, such as stiffeners, connecting plates, scallops, and slits. Even if the user does not individually specify the location of these connecting members and detailed members, the creation location, shape, and dimensions of the structural members can be automatically determined by the fourth rule (connection and detail rule) stored in the steel bridge-specific rule database (120). Through this, the user only needs to define the location of the main structural members, and the remaining connecting and detailed members can be automatically completed by the rule, thereby greatly improving the efficiency of the modeling work.

[0099] Meanwhile, the elements of the BIM model are created by classifying them into a hierarchical structure that includes assembly units, transport units, and component units.

[0100] FIG. 10 is an example of a BIM model at the LOD-400 level created according to one embodiment of the present invention.

[0101] Referring to Fig. 10, the BIM model can be generated as a hierarchical structure finely divided into assembly units, transport units, and member units of the steel bridge. Here, the assembly unit may correspond to a unit that is assembled and completed as a single unit at the steel bridge fabrication plant, the transport unit may correspond to a unit in which the assembled part is divided into sizes and weights suitable for transport to the site, and the member unit may correspond to a minimum unit that is individually cut and processed, such as a single plate or structural steel.

[0102] This hierarchical structure may be configured as a tree structure in which the top-level assembly unit includes multiple transport units, and each transport unit includes multiple component units, and the elements of each level may be automatically assigned an identification number of that level.

[0103] Here, the classification of assembly units can be determined based on the structural configuration of the steel bridge. For example, in the case of a steel box girder bridge, an entire box girder can be classified as a single assembly unit, and in the case of a plate girder bridge, an entire I-beam can be classified as a single assembly unit. Additionally, members connecting girders, such as cross beams and horizontal braces, may be included in any of the assembly units of adjacent girders or classified as separate assembly units.

[0104] In addition, the classification of transport units may be determined by dividing assembly units into sizes and weights suitable for road transport. Specifically, the size and weight of the transport units may be determined so as not to exceed transport restriction standards stipulated in relevant laws, such as the Road Act (e.g., restrictions on loading width, loading height, loading length, and gross weight). If an assembly unit is within the transport restriction standards, it may constitute a single transport unit; if an assembly unit exceeds the transport restriction standards, it may be divided into multiple transport units based on the location of the field splice.

[0105] In addition, the classification of component units can be determined based on the minimum units that are individually cut and processed. For example, a single plate, a single shape, or a single set of bolts can each be classified as a component unit. Within a transport unit, multiple component units may be joined by welding or bolt connections to form a single transport unit.

[0106] As illustrated in FIG. 10, the BIM model includes the three-dimensional geometry of the entire steel bridge, with an enlarged internal detail of the support section displayed in the upper left corner and an enlarged detail of the transport unit block and attribute information (Element Specific panel) displayed in the lower right corner. The attribute information may include Element Specific items such as Description, Oid, Gherly, Shape, ObjectType, and Transferred bar, as well as Tekla Common items such as Assembly mark, Bottom elevation, Class, Finish, Grade, Name, Part mark, Phase, Preliminary mark, Profile, PROJECT.BUILDER, and PROJECT.DESIGNER. The BIM model may be a complete BIM model that includes information such as part numbers and assembly numbers, including basic geometric information.

[0107] For example, assembly marks such as "1BX-C02" can be automatically assigned to assembly units, transport block numbers such as "1SX-A01" and "1SX-A02" to transport units, and part marks such as "UWR02-10A" to component units. These identification numbers can be utilized to track and manage each unit during the fabrication, transportation, and on-site installation processes of the steel bridge. Furthermore, in addition to identification numbers, at least one of production information, inspection information, transportation information, and installation information can be assigned as an attribute to each element of the hierarchical structure; this enables the centralized management of historical information for each management unit within the BIM model throughout the entire process from the fabrication to the on-site installation of the steel bridge.

[0108] This hierarchical structure can be utilized as a standard management unit at each stage of steel bridge fabrication, transportation, and on-site installation.

[0109] Specifically, assembly units can be utilized as the basic management unit in the factory production process. For example, production schedules within the factory can be organized for each assembly unit, and the progress status of processes such as cutting, machining, welding, and painting for the transport units and component units included in the assembly unit can be tracked based on the assembly unit. Furthermore, the completion status of assembly within the factory can be managed for each assembly unit, and the assembly unit's identification number (assembly mark) can be linked to the factory's production management system to record production history.

[0110] In addition, the transport unit can be utilized as a management unit in establishing a transport plan from the factory to the site. For example, the weight and external dimensions (height, width, length) of each transport unit can be used to determine compliance with legal restrictions during road transport (e.g., restrictions on loading height, loading width, loading length, and total weight). Furthermore, a dispatch plan and loading arrangement for transport vehicles can be established for each transport unit, and the transport order can be determined in conjunction with the installation order at the site. The list of weights and volumes per transport unit, automatically generated by the report generation unit (140), can be utilized as basic data for establishing such a transport plan.

[0111] Furthermore, component units can be utilized as management units for the cutting, processing, and quality inspection of individual components. A Part Mark can be automatically assigned to each component unit, and attribute information such as material, specifications, profile, and weight can be managed for each unit. This attribute information for each component unit can be used for the automatic generation of steel order lists, the creation of Numerical Control (NC) cutting data, and the tracking of quality inspection history for each component.

[0112] Furthermore, during the on-site installation phase, the installation sequence can be planned based on assembly or transport units, and on-site delivery confirmation, installation location matching, and installation completion status can be managed based on the identification number of each unit. Through this, the hierarchical structure of the BIM model can function not only as a means of model configuration during the design phase but also as foundational data for an integrated management system covering the entire process of fabrication, transportation, and installation.

[0113] The detailed procedure for generating a rule-based model by the model generation engine (130) can proceed in the order of determining the bridge type and design conditions, semi-automatic generation of the structural frame according to the alignment, application of cross-sectional parameters, automatic placement of repeating members, and automatic generation of detailed members and attributes.

[0114] Additionally, the model generation engine (130) can display the generation progress status to the user in real time during the BIM model generation process. For example, the ratio of the number of members completed to date to the total number of members, the span number or member type currently being processed, etc., may be displayed as progress status information. Additionally, whenever the generation of each span or each member type is completed, the model generation engine (130) can perform an intermediate verification of the geometric alignment of the generated members (e.g., whether there is interference between members, whether the connection point coordinates match, etc.), and if an error is detected during the intermediate verification, the generation of the corresponding span or member type may be paused and the error details may be notified to the user.

[0115] In addition, the present method (S100) can automatically regenerate a BIM model by re-selecting a rule corresponding to the changed information in step S140 and applying the re-selected rule in step S150 when at least one of the bridge basic information, alignment information, uplift information, or location information entered in steps S110 to S130 is changed.

[0116] According to the present invention, this eliminates the burden of manually rewriting the BIM model whenever a design change occurs. For example, if the span length of a bridge changes, the girder shape rule (Rule 1), section dimension rule (Rule 2), member placement rule (Rule 3), and connection detail rule (Rule 4) corresponding to the span are re-selected to match the changed span length, and the BIM model can be automatically updated by applying the re-selected rules. Similarly, if the road alignment changes from a straight line to a curve or the superelevation value changes, the 3D coordinates of all members are recalculated according to the changed alignment information, and the BIM model can be regenerated.

[0117] Additionally, the model generation engine (130) can automatically analyze and display to the user the range of members affected by the changed information before regenerating the BIM model when at least one of the bridge basic information, alignment information, uplift information, or location information is changed. For example, when the span length of a specific span is changed, the model generation engine (130) can identify structural members such as girder members, diaphragms, cross beams, and bracing included in the span, as well as connecting members and detailed members connected thereto, as the affected range and provide this to the user through a change impact report or a highlight display on a 3D viewer. Through this, the user can identify the affected range of the design change in advance and, if necessary, selectively specify the regeneration range, thereby further improving the efficiency of responding to design changes in large-scale projects.

[0118] Additionally, referring to FIG. 1, the present method (S100) may include a step S160 of automatically generating a verification report based on a BIM model after step S150. For example, the verification report may include at least one of a review of the positional shoe location coordinates, a review of the height of the shoe at the support, a review of the underpass space at the support, a list of weights and volumes per transport unit, and a review of jack-up reinforcement and substructure.

[0119] FIG. 11 is an example of a support section shoe position coordinate review report generated according to one embodiment of the present invention. Referring to FIG. 11, the support section shoe position coordinate review report may be a report that displays the difference by comparing the design coordinates of the shoe located at the bottom of the girder for each pier and abutment in the BIM model with the coordinates on the BIM model. As shown in FIG. 11, for the RAMP-A bridge, columns such as reference drawing (X), Y coordinate (signboard, Y drawing board), calculation during fabrication (X, Y), difference (XY), difference 2 review, distance between SHOE, and distance between SHOE (distance-b) may be displayed for each pier (A1, P1, P2, A2) and location (G1, G2, G3, G4). At the bottom of the screen, setting items such as Calc Shoe Distance, reference pier, reference girder, and location, and function buttons such as Draw Shoe Section, Store, and Close may be arranged.

[0120] FIG. 12 is an example of a support section shoe height review report generated according to one embodiment of the present invention. Referring to FIG. 12, the support section shoe height review report may be a report that calculates and displays data such as the standard height at each pier and abutment girder location, the difference in half gradient, the height to EQ (W-plate butting), BOX WEB DEPTH, lower FLG. THK., SOLE PL upper EL., SOLE THK., shoe upper EL. (during manufacturing), shoe height, console upper EL. (during manufacturing), concrete upper EL. (basic drawing), and conch shell (saddle upper EL.). As shown in FIG. 12, the above items are calculated in a table form for each girder from G1 to G4 at the A1 (Abutment #1) location of the RAMP-A bridge, and additional information such as shoe specifications, allowable half load (kN), shoe expansion specifications, SOLE PL specifications (bottom surface × width), SOLE PL bolt hole (D), and gradient (%) may also be included. At the bottom of the screen, setting items such as Calc Shoe Distance, Reference Pier, Reference Girder, and Position, as well as function buttons such as Draw Shoe Section, Store, and Close, may be placed.

[0121] FIG. 13 is an example of a support clearance review report generated according to one embodiment of the present invention. Referring to FIG. 13, the support clearance review report may be a report that calculates and displays the clearance between the lower part of the steel bridge and the substructure (such as a pier coping) at the support section in the form of a cross-sectional view. As shown in FIG. 13, a front cross-sectional view of the steel bridge is displayed on the left side, showing various dimensions between the lower part of the box girder and the pier coping (e.g., pier coping width, height, clearance distance between the lower flange of the girder and the top of the coping, etc.), and a side cross-sectional view is displayed on the right side, showing the clearance dimensions viewed from the direction of the pier. In addition, the support clearance can be visually confirmed in a 3D BIM model view.

[0122] FIG. 14 is an example of a list of weight and volume per transport unit generated according to one embodiment of the present invention. Referring to FIG. 14, the list of weight and volume per transport unit may be a report that automatically calculates and outputs in a table form the BOX GIRDER PROFILE (BOXNO, HEIGHT, WIDTH), Weight (A-4), BOX (A-4) dimensions, BRACE (BH) (D) (TOTAL weight), etc., for each transport unit of the BIM model. As shown in FIG. 14, dimensions related to height, width, weight, and volume are listed for each transport unit, such as 1SX-A01 to 1SX-A18 and 1SX-B01 to 1SX-B18, for G1-Total and G2-Total, and a conceptual diagram of a transport unit block loaded on a transport truck may be displayed on the right.

[0123] Furthermore, the Jack-up Reinforcement and Substructure Review Report can serve as a report to pre-examine the suitability of reinforcement materials required for jack-up operations during steel bridge construction, as well as any interference or mismatch with the substructure. In particular, the Jack-up Reinforcement and Substructure Review Report can verify the dimensional consistency between the steel bridge's substructure (pier coping, abutment breast wall, etc.) and the superstructure; through this, it enables the detection and correction of mismatches with the civil engineering work (substructure) in advance during the installation of the steel bridge.

[0124] Additionally, the report generation unit (140) can automatically generate at least one of a welding space suitability review report and a painting space suitability review report based on the BIM model. The welding space suitability review report may be a report that automatically verifies whether sufficient workspace is secured around the joint where welding is performed in the BIM model to allow access by a welding torch and a worker. The painting space suitability review report may be a report that automatically verifies whether sufficient clearance distance required for access by painting equipment is secured around the surface of the member where painting is performed in the BIM model. The model generation engine (130) can determine the suitability of each joint and member surface in the BIM model with a preset minimum workspace standard, and locations determined to be unsuitable may be recorded in the report along with the 3D coordinates of the location and the reason for unsuitability.

[0125] In addition, attributes such as material, specifications, and weight can be automatically assigned to each component of the BIM model, and based on this, automatic quantity calculation (weight, area, quantity) can be performed. The calculated quantity data can be linked with fabrication drawings, production management, and schedule management data to ensure data consistency between design, fabrication, and construction.

[0126] In addition, the BIM model can be output as open LOD-400 level BIM data based on IFC (Industry Foundation Classes) and can be configured to be used in parallel with existing design and manufacturing tools such as Tekla.

[0127] In the existing process, the sequence was "Detailed Design → BIM Modeling (Manual) → Quantity Calculation," but in the improved process to which this method (S100) is applied, the sequence can be "Detailed Design → Design Data Input → Rule-based BIM Automatic Generation → Quantity Calculation," and the structure can be designed to automate only the step of creating the BIM model while maintaining the existing business process.

[0128] In addition, according to the present invention, the generated BIM model can be explored from various angles through a 3D viewer, and attribute information of each member can be checked together.

[0129] FIG. 15 is an example diagram showing the overall characteristics and aerial view of a steel bridge of a BIM model created according to one embodiment of the present invention. Referring to FIG. 15, the three-dimensional shape of the entire steel bridge is displayed from an aerial view, and each component (assembly unit, transport unit, etc.) can be listed and displayed in a tree structure on the right panel. When each component is selected, the name, specifications, etc. of the corresponding element can be checked.

[0130] FIG. 16 is an example diagram showing an aerial view of a steel bridge of a BIM model created according to one embodiment of the present invention. Referring to FIG. 16, the superstructure of the steel bridge can be observed from a closer aerial viewpoint, and a list and specifications of each member may be displayed in the upper right panel, and the Description, Oid, Gherly, Shape, ObjectType, Transferred bar, and Tekla Common items may be displayed in the Element Specific panel at the bottom right.

[0131] FIG. 17 is an example diagram showing a bottom view of a steel bridge in a BIM model created according to one embodiment of the present invention. Referring to FIG. 17, the bottom flange, diaphragm, cross beam, pier, etc. of a box girder may be displayed at the point of observation of the bottom of the steel bridge, and a list and specifications of each member may be displayed on the right panel.

[0132] FIG. 18 is an example diagram showing an internal navigation view of a BIM model created according to one embodiment of the present invention. Referring to FIG. 18, internal structural members such as diaphragms, vertical reinforcing members, horizontal braces, and brackets may be displayed when navigating the interior of the branch section, and a list and specifications of each member may be displayed in the upper right panel, and the items Description, Oid, Gherly, Shape, ObjectType, Transferred bar, and Tekla Common may be displayed in the Element Specific panel at the bottom right.

[0133] FIG. 19 is an example diagram showing girder views and attribute information of a BIM model generated according to one embodiment of the present invention. Referring to FIG. 19, the three-dimensional shape of the girder is displayed, and element assemblies (e.g., 1BX-C03, 1BX-C02, SHOE, etc.) can be displayed in a tree form in the IFC structure search panel. In the Element Specific panel at the bottom left, Tekla Assembly information such as Assembly / Cast unit bottom elevation, Assembly / Cast unit Mark, Assembly / Cast unit name, Assembly / Cast unit position code, Assembly / Cast unit top elevation, Assembly / Cast unit weight, etc., can be displayed. In the Location panel at the bottom right, location information such as Project, Building, Storey, Top Elevation, Bottom Elevation, Global Top Elevation, and Global Bottom Elevation, and Geometry items such as Has Own Geometry, Children Have Geometry, Global X, Global Y, Global Z, Bounding Box Length, Bounding Box Width, and Bounding Box Height can be displayed.

[0134] FIG. 20 is an example diagram showing girder main web views and attribute information of a BIM model generated according to one embodiment of the present invention. Referring to FIG. 20, the three-dimensional shape of the girder main web is displayed, and flight elements may be displayed in the IFC structural search panel. In the Element Specific panel, items such as Assembly mark, Bottom elevation, Class, Control number, DIAMETER, Finish, Grade, Name, Part mark, Phase, Preliminary mark, Profile, PROJECT.BUILDER, PROJECT.DESIGNER, SITE_WORKSHOP, Top elevation, etc. may be displayed as Tekla Common items. Quantity information such as Area per tons, Assembly Weight, Gross area, Gross footprint area, etc. may be displayed as Tekla Quantity items.

[0135] FIG. 21 is an example diagram showing a view of the under-bridge space of a steel bridge support section of a BIM model generated according to one embodiment of the present invention. Referring to FIG. 21, the dimensions of the under-bridge space of the support section can be visually displayed on a 3D viewer, a member tree structure is displayed in the upper right panel, and attribute information of the corresponding element can be viewed together in the Element Specific panel at the lower right.

[0136] Meanwhile, based on the step-by-step flow of the present method (S100) described in detail above, we will briefly examine the steel bridge BIM 3D modeling automation system (hereinafter referred to as "the present system") according to one embodiment of the present invention, which is a system for performing the present method (S100). For reference, since the aforementioned present method (S100) is performed by the present system (100), the description of the present method (S100) can be applied in the same way to the description of the present system (100), even if the content is omitted below. Furthermore, it goes without saying that the description of the present system (100) below can also be applied in the same or similar way to the present method (S100) examined above.

[0137] As described above, FIG. 2 is a block diagram illustrating a steel bridge BIM 3D modeling automation system according to one embodiment of the present invention.

[0138] Referring to FIG. 2, the system (100) includes an input unit (110), a steel bridge-specific rule database (120), and a model generation engine (130).

[0139] The input unit (110) is configured to receive basic bridge information including the bridge type, span configuration, girder row configuration, and girder cross-sectional shape of the steel bridge, alignment information and uplift amount information of the road where the steel bridge is installed, and location information of members included in the steel bridge. Steps S110 to S130 of the present method (S100) can be performed by the input unit (110).

[0140] The steel bridge-specific rule database (120) is configured to store rules classified by the type of steel bridge and by member type. This steel bridge-specific rule database (120) may be associated with the execution of step S140 of the present method (S100).

[0141] The model generation engine (130) is configured to select one or more rules corresponding to information received from the input unit (110) from the steel bridge-specific rule database (120), calculate three-dimensional coordinates of members by linking linear information and uplift information, and generate a BIM model by applying the selected rules. The model generation engine (130) generates the elements of the BIM model by classifying them into a hierarchical structure including assembly units, transport units, and member units. Steps S140 and S150 of the present method (S100) can be performed by this model generation engine (130).

[0142] Additionally, referring to FIG. 2, the system (100) may include a report generation unit (140) that automatically generates quantity calculation information and a verification report based on a BIM model. Step S160 of the method (S100) may be performed by this report generation unit (140).

[0143] In addition, the system (100) may include a function to review errors that may occur during steel bridge fabrication and the suitability of welding and painting spaces, and a function to review in advance mismatches with civil engineering that may occur during steel bridge installation.

[0144] In addition, this system (100) can be applied to major steel bridge types such as steel box girder bridges and plate girder bridges, and can be further expanded to include additional application of steel bridge types, expansion of BIM utilization in construction and maintenance stages, design standardization and linkage with quality management systems, digitalization of existing aging bridges (BIM application), and BIM utilization during renovation, repair, and expansion work.

[0145] Meanwhile, the above-described method (S100) may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, etc., either individually or in combination. The program instructions recorded on the medium may be those specifically designed and configured for the method (S100), or they may be those known and available to those skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes; optical recording media such as CD-ROMs and DVDs; magneto-optical media such as floptical disks; and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, and flash memory. Examples of program instructions include machine code, such as that generated by a compiler, as well as high-level language code that can be executed by a computer using an interpreter, etc. The above-described hardware device may be configured to operate as one or more software modules to perform the operation of the present method (S100), and vice versa.

[0146] In addition, the above-described method (S100) may also be implemented in the form of a computer program or application that is stored on a computer-readable recording medium and executed by a computer.

[0147] Additionally, a computer program according to one embodiment of the present invention may be a computer program that performs the method (S100) when executed on a computer. The computer program may include instructions that perform the method (S100) when executed by one or more processors. The computer program may be stored on a computer-readable non-transitory recording medium and may be executed on a server, an industrial computer, a control system, or in a cloud environment.

[0148] In addition, the computer program may be provided in the form of an application that runs independently, or as a plugin or component of BIM software (e.g., Tekla Structures). Furthermore, the computer program may operate by interacting with CAD software such as ACAD through the API of the CAD software, and by interacting with BIM software such as Tekla Structures through the public API of the BIM software.

[0149] The foregoing description of the present invention is for illustrative purposes only, and those skilled in the art will understand that other specific forms can be easily modified without altering the technical concept or essential features of the present invention. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. For example, each component described as a single unit may be implemented in a distributed manner, and components described as distributed may likewise be implemented in a combined form.

[0150] The scope of the present invention is defined by the claims set forth below rather than by the detailed description above, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts thereof should be interpreted as being included within the scope of the present invention. Explanation of the symbols

[0151] 100: Steel Bridge BIM 3D Modeling Automation System 110: Input section 120: Steel Bridge Dedicated Rule Database 130: Model Generation Engine 140: Report Generation Section

Claims

Claim 1 A method for automating BIM 3D modeling of a steel bridge, performed by a steel bridge BIM 3D modeling automation system, comprising: (a) receiving basic bridge information including the bridge type, span configuration, girder row configuration, and girder cross-sectional shape of the steel bridge; (b) receiving alignment information and uplift information of the road on which the steel bridge is installed; (c) receiving location information of members included in the steel bridge; (d) selecting one or more rules corresponding to at least some of the basic bridge information, alignment information, and location information from a pre-established rule database dedicated to steel bridges; and (e) a step of calculating the three-dimensional coordinates of the members by linking the linear information and the uplift information, and creating a BIM model by applying the selected rule; wherein the elements of the BIM model are created by classifying them into a hierarchical structure including assembly units, transport units, and member units, and the step (d) includes a rule conflict resolution procedure for resolving the mutual conflict according to a predefined priority criterion when a mutual conflict occurs among at least some of the multiple rules selected in the steel bridge dedicated rule database, wherein the mutual conflict includes a mutual conflict in the form of physical interference, and the priority criterion includes a predefined interference resolution criterion for adjusting to resolve physical interference according to the type of members and the form of interference in which physical interference occurred, and the predefined interference resolution criterion includes a criterion set to apply at least one of positional movement and specification change for resolving physical interference to at least one member that has relatively less impact on structural safety when adjusting to resolve physical interference. Claim 2 A method for automating BIM 3D modeling of a steel bridge according to claim 1, wherein the steel bridge-specific rule database comprises a four-category rule system including: a first rule including a rule for generating a basic shape for each bridge type; a second rule including a rule for calculating the shape / dimension of a girder cross-section according to design conditions including span length and bridge width, and conditions for thickness change according to the position of plate members included in the girder within the span; a third rule including rules for the spacing and pattern of the members; and a fourth rule including rules for generating details considering shape rules for connections including bolted connections and welded connections, and fabrication and constructability. Claim 3 delete Claim 4 delete Claim 5 A method for automating steel bridge BIM 3D modeling according to claim 1, wherein the priority criteria include a condition-based criterion in which a special rule applied when a predetermined condition is satisfied takes precedence over a general rule applied even when the predetermined condition is not satisfied. Claim 6 A method for automating steel bridge BIM 3D modeling, wherein, in claim 1, the priority criteria include source-based criteria in which, depending on the source of the rules, rules based on design guidelines or specifications take precedence over rules based on internal standards, and rules based on internal standards take precedence over rules based on manufacturing practices. Claim 7 A method for automating BIM 3D modeling of a steel bridge according to claim 1, wherein the linear information includes planar linear information, longitudinal linear information, and superelevation information, the planar linear information includes shape information of a straight section, a circular curve section, and a transition curve section, the longitudinal linear information includes shape information of a straight section, a circular curve section, and a longitudinal curve section, and the superelevation information includes superelevation angle information at the starting and ending points of the steel bridge. Claim 8 A method for automating steel bridge BIM 3D modeling according to claim 1, wherein step (e) calculates the reference point coordinates of each structural member among the members based on the linear information when calculating the three-dimensional coordinates, and calculates the final three-dimensional coordinates by reflecting the uplift amount information in the reference point coordinates. Claim 9 A method for automating steel bridge BIM 3D modeling, wherein, in claim 1, the hierarchical structure is composed of a tree structure in which the assembly unit at the top level includes a plurality of transport units, and each transport unit includes a plurality of member units, and an identification number of the corresponding level is automatically assigned to the elements of each level. Claim 10 The method for automating steel bridge BIM 3D modeling according to claim 1 further comprises: (f) a step of automatically generating a verification report based on the BIM model after step (e); wherein the verification report includes at least one of a support shoe position coordinate review sheet, a support shoe height review sheet, a support underpass review sheet, a weight and volume list by transport unit, and a jack-up reinforcement and substructure review sheet. Claim 11 The steel bridge BIM 3D modeling automation method according to claim 1, wherein if at least one of the bridge basic information, alignment information, uplift amount information, or location information entered in steps (a) to (c) is changed, a rule corresponding to the changed information is re-selected in step (d), and the BIM model is automatically regenerated by applying the re-selected rule in step (e). Claim 12 As an automated BIM 3D modeling system for steel bridges, an input unit that receives basic bridge information including the bridge type, span configuration, girder thermal configuration, and girder cross-sectional shape of the steel bridge, alignment information and uplift information of the road where the steel bridge is installed, and location information of members included in the steel bridge; and a steel bridge-specific rule database that stores rules classified by the type of steel bridge and member type; A steel bridge BIM 3D modeling automation system comprising: a model generation engine that selects one or more rules corresponding to information received from the input unit from the steel bridge-dedicated rule database, calculates three-dimensional coordinates of the members by linking the linear information and the uplift information, and generates a BIM model by applying the selected rules; wherein the model generation engine generates the elements of the BIM model by classifying them into a hierarchical structure including assembly units, transport units, and member units, and performs a rule conflict resolution procedure to resolve the mutual conflict according to a predefined priority criterion when a mutual conflict occurs among at least some of the multiple rules selected from the steel bridge-dedicated rule database, wherein the mutual conflict includes a mutual conflict in the form of physical interference, and the priority criterion includes a predefined interference resolution criterion to adjust for resolving physical interference according to the type and interference form of the members in which physical interference occurred, and the predefined interference resolution criterion includes a criterion set to apply at least one of positional movement and specification change for resolving physical interference to at least one member that has relatively less impact on structural safety when adjusting for resolving physical interference.

Images