A rapid design method for beam-column bracket based on functional graphic objects

Abstract

The invention discloses a rapid design method for a beam-column bracket based on functional graphic objects, comprising the following steps: establishing a basic graphic object in an interactive drawing system; establishing a longitudinal arrangement object group and a transverse arrangement object group of the beam-column bracket; modifying the longitudinal arrangement scheme and the transverse arrangement scheme of the steel pipe column; establishing a rod finite element calculation model to calculate the maximum number of required main load-bearing beams; performing equal load area segmentation on the main beam reference section to establish a plane layout diagram including large beams, small beams and main load-bearing beams; establishing a plane layout diagram of the steel pipe column foot plane and the concrete strip foundation plane; establishing a plane layout diagram of the steel pipe column section and the connecting piece plane; establishing a two-dimensional / three-dimensional rod finite element calculation model for the designed beam-column bracket, calculating the mechanical calculation results of the beam-column bracket, and establishing a table of engineering quantities for the beam-column bracket design scheme.

Description

Technical Field

[0001] The invention relates to a construction method of a bridge project, in particular to a rapid design method of a beam-column bracket based on a functional graphic object. Background Art

[0002] In the field of bridge engineering, beam-column brackets are an important and frequently used temporary bracket structure in cast-in-place bridge construction. They involve the construction cost of large bridge construction and are the key content that needs to be paid attention to in order to tap the potential and increase the efficiency of bridge construction. Their design work needs to be arranged according to the main beam, piers, terrain, hydrogeological conditions and other on-site conditions, and structural calculations, engineering quantity calculations and construction detail drawings should be carried out according to construction technical specifications. Although the existing design methods of beam-column brackets can complete the design drawing and structural calculation of beam-column brackets, it is still difficult to effectively support the whole process of scheme design, construction drawing and engineering quantity calculation. In the design work, the coordination of various links is poor, the work efficiency is low, it takes a long time, and it is easy to make mistakes. Therefore, it is not conducive to the repeated optimization design of beam-column bracket structures, and affects the excavation of the digital application level of industry construction. Summary of the invention

[0003] The purpose of the present invention is to provide a rapid design method for a beam-column bracket based on functional graphic objects, so as to solve the problems of low efficiency and low level of digital application in existing beam-column bracket design methods.

[0004] The object of the present invention is achieved in that:

[0005] A rapid design method for a beam-column bracket based on a functional graphic object comprises the following steps:

[0006] A1. Establish basic graphic objects including pier elevation L1, abutment elevation L2, main beam longitudinal section L3, main beam reference section L4, ground line L5, first longitudinal axis L6, second longitudinal axis L7, third longitudinal axis L8 and fourth longitudinal axis L9 in the interactive drawing system.

[0007] A2. Based on the basic graphic objects, a longitudinal arrangement object group and a transverse arrangement object group of the beam-column type brackets between the two pier spans of the pre-built bridge are established; the longitudinal arrangement object group and the transverse arrangement object group constitute a scheme object group; the component objects in the scheme object group include steel pipe columns, large beams, small beams, main load-bearing beams, concrete strip foundations, square timbers, column capitals, column bases, unloading blocks and bamboo plywood; the above component objects are all independent functional graphic objects, with attribute information including name, specification, length, material and display status, as well as professional functions of functional graphic objects.

[0008] A3. According to the terrain and technical conditions on site, modify the attribute information of each component object in the scheme object group, including steel tube columns, large beams, small beams, main load-bearing beams, concrete strip foundations, square timbers and bamboo plywood; use editing operations including copying, moving and deleting or professional functions of functional graphic objects to modify the longitudinal and transverse layout plans of steel tube columns.

[0009] A4. According to the longitudinal section L3 of the main beam and the longitudinal arrangement object group, a rod finite element calculation model for the main load-bearing beam is established, and the construction load borne by the main load-bearing beam is calculated; the main load-bearing beam is subject to the constraints of the steel pipe columns in the longitudinal arrangement object group supporting it; mechanical calculations are performed on the rod finite element calculation model to obtain the maximum cross-sectional normal stress, shear stress and maximum vertical displacement borne by the main load-bearing beam; when the main load-bearing beam is a Bailey beam, the maximum chord axial force, diagonal rod axial force and vertical rod axial force borne by the Bailey beam are obtained through mechanical calculations of the rod finite element calculation model; finally, the maximum number of main load-bearing beams required is calculated according to the design value indicators given in the technical specifications.

[0010] A5. According to the maximum number of main load-bearing beams, the main beam reference section L4 is divided into regions with equal loads, and the construction load borne by each region is calculated; the equivalent concentrated load of the construction load of each region is arranged in the form of a concentrated load object at the position of its equivalent concentrated load, and then the main load-bearing beam section in the transverse arrangement object group is arranged to the position of the concentrated load object, thereby obtaining an adjusted scheme object group.

[0011] A6. Based on the adjusted scheme object group, establish a plane layout drawing including large beams, small beams and main load-bearing beams. The plane layout drawing is a beam plane layout object group composed of large beam planes, small beam planes and main load-bearing beam planes. Its plane position uses the first longitudinal axis L6 as the reference line to represent the plane layout of the beam plane layout object group relative to the beam axis of the concrete main beam.

[0012] A7. Based on the adjusted scheme object group, establish a plan layout drawing including the column base plane and the concrete strip foundation plane. The plan layout drawing is a foundation plane layout object group composed of a group of independent column base planes and concrete strip foundation planes. Its plane position is based on the second longitudinal axis L7 as the reference line, which is used to represent the plan layout of the foundation plane layout object group relative to the beam axis of the concrete main beam.

[0013] A8. Based on the adjusted scheme object group, establish a plan layout drawing including steel tube column sections and connector planes. The plan layout drawing is a steel tube column section and connector plane object group composed of the steel tube column sections and connector planes. Its plane position is based on the third longitudinal axis L8 as the reference line, which is used to represent the plan layout of the steel tube column section and connector plane object group relative to the beam axis of the concrete main beam.

[0014] A9. Based on the main beam longitudinal section L3, the main beam reference section L4 and the small cross beam section, establish the line load position characteristic line J1 representing the load arrangement position on the small cross beam and the corresponding transverse line load T1. The line load position characteristic line J1 is arranged with the third longitudinal axis L8 as the reference line; the transverse line load T1 and the line load position characteristic line J1 constitute a load arrangement object group.

[0015] A10. According to the main beam longitudinal section L3, the main beam reference section L4 and the beam plane layout object group, the steel pipe column section and the connecting piece plane object group and the load layout object group, a two-dimensional / three-dimensional rod finite element calculation model for the designed beam-column bracket is established; mechanical calculation is performed on the two-dimensional / three-dimensional rod finite element calculation model to obtain the mechanical calculation results of the designed beam-column bracket including strength, stiffness and stability.

[0016] A11 compares the obtained mechanical calculation results with the specification requirements of the beam-column support design scheme. If the specification requirements are not met, the component objects in the longitudinal arrangement object group and / or the transverse arrangement object group in the scheme object group are modified by modifying the attributes of the component objects, and then steps A3 to A11 are repeated; until the obtained mechanical calculation results meet the specification requirements, each object group is finally determined.

[0017] A12. Establish the engineering quantity table of the beam-column support design scheme based on the final determined beam plane layout object group, longitudinal layout object group and transverse layout object group.

[0018] The present invention is implemented by creating and operating functional graphic objects, which have the following basic characteristics:

[0019] 1. Functional graphic objects are two-dimensional geometric graphic objects in the graphics system, similar to block objects in AutoCAD, which can be selected, moved, copied, enlarged, reduced and other editing operations. However, the difference is that functional graphic objects require customized engineering attribute information and professional functions. The operation interface of functional graphic objects can be activated by the mouse, and the relevant attribute information or parameter information of functional graphic objects and some operation buttons for realizing professional functions are displayed on the operation interface. By clicking the relevant button operations, the professional functions of functional graphic objects can be realized. Therefore, functional graphic objects are also an information model in the graphics system.

[0020] 2. Functional graphic objects can be obtained through parameterization and forced conversion methods. For simple functional graphic objects, they can be realized through parameterization methods, that is, the required functional graphic objects can be created by entering several parameters. For complex functional graphic objects, forced conversion methods can be used to realize them.

[0021] 3. The forced conversion method is a basic method for converting a geometric object into a functional graphic object with engineering attributes and professional functions. The basic steps of the forced conversion method are: first draw a geometric object using the interactive geometric drawing and editing method; then load or associate the relevant engineering data in the graphic data of the geometric object through mouse operation, and provide corresponding professional functions.

[0022] 4. The functional graphic object itself is a kind of graphic data, which contains data reflecting its geometric shape and data reflecting its engineering characteristics. It can be identified and extracted to perform corresponding engineering calculations.

[0023] The present invention belongs to a property editing method for functional graphic objects. For an established functional graphic object, the property information of the functional graphic object can be set through its operation interface to obtain the required functional graphic object and display status. This method of modifying the functional graphic object can be called a property editing method.

[0024] The present invention is a design method for beam-column supports based on BIM. By creating and operating two-dimensional functional graphic objects, the scheme design of the beam-column supports and two-dimensional / three-dimensional mechanical calculations can be quickly realized, and construction details and engineering quantities can be quickly obtained. By constructing and applying a suitable BIM model, this technology is applied to the design of beam-column supports, and complex and diverse beam-column supports can be realized in a systematic, coordinated, efficient and professional manner, and the simplification, coordination, standardization, refinement and efficiency of such design work can be achieved, which is beneficial to the refined management and control of bridge engineering construction projects and to the potential tapping and efficiency improvement of construction companies. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the basic graphic objects; among them, (a) is a schematic diagram of the longitudinal section of the main beam, the elevation of the pier, the elevation of the abutment and the ground line; (b) is a schematic diagram of the graphic object of the main beam reference section L4.

[0026] Figure 2 It is a schematic diagram of graphic objects of longitudinal axes representing the planar arrangement relationship of components; among them, (a) is the graphic object of the first longitudinal axis L6; (b) is the graphic object of the second longitudinal axis L7; (c) is the graphic object of the third longitudinal axis L8; and (d) is the graphic object of the fourth longitudinal axis L9.

[0027] Figure 3 Schematic diagrams of the longitudinal and transverse arrangements of a beam-column support; (a) is a schematic diagram of the longitudinal arrangement; (b) is a schematic diagram of the transverse arrangement.

[0028] Figure 4 It is a schematic diagram of line load object.

[0029] Figure 5 It is a schematic diagram of the finite element calculation model of the main load-bearing beam.

[0030] Figure 6 It is a schematic diagram of the divided areas and concentrated loads of the main load-bearing beam.

[0031] Figure 7 It is a plan layout diagram of the beam plan layout object group.

[0032] Figure 8 It is a schematic diagram of the plan layout of the adjusted beam plan layout object group.

[0033] Fig. 9 It is a schematic diagram of the plan layout of the column base plane and the concrete strip foundation plane.

[0034] Fig.10 It is a schematic diagram of the plan layout of the adjusted column base plane and concrete strip foundation.

[0035] Fig.11 It is a schematic diagram of the plan layout of the steel pipe column section and the connecting parts plane object group.

[0036] Fig.12 It is a schematic diagram of the characteristic line J1 of the line load position.

[0037] Fig.13 It is a schematic diagram of transverse line load T1.

[0038] Fig.14 This is a schematic diagram of the regional plan boundary.

[0039] Fig.15It is a schematic diagram of a concrete main beam; among them, (a) is a longitudinal section of the main beam; (b) is a cross-sectional view of the main beam; and (c) is a plan view of the web thickness of the main beam.

[0040] Fig.16 It is a schematic diagram of a rod; among them, (a) is a elevation view of the rod; (b) is a plan view of the rod; and (c) is a cross-sectional view of the rod.

[0041] Fig.17 is a schematic diagram of a Bailey beam; among them, (a) is the elevation view of the Bailey beam; (b) is the cross-sectional view of the Bailey beam; and (c) is the plan view of the Bailey beam.

[0042] Fig.18 is a schematic diagram of a group of Bailey beams; among them, (a) is a cross-sectional diagram of a group of Bailey beams; (b) is a plan view of a group of Bailey beams.

[0043] Fig.19 It is a schematic diagram of a steel tube column; among them, (a) is an outline diagram of the steel tube column; (b) is a cross-sectional diagram of the steel tube column.

[0044] Fig. 20 It is a schematic diagram of the column capital, column foot and unloading block attached to the steel pipe column.

[0045] Fig.21 It is a schematic diagram of the structure of the steel pipe column and the connecting parts; wherein, (a) is a position relationship diagram of the steel pipe column and the connecting parts; (b) is a structural diagram of the connecting parts.

[0046] Fig. 22 Schematic diagram of the structural types of connectors, where (a) is a Z-type connector; (b) is an inverted Z-type connector; and (c) is an X-type connector.

[0047] Fig.23 2 is a diagram of the adaptive adjustment of the steel pipe column connector; wherein (a) is a schematic diagram of the steel pipe column connector before adaptation; and (b) is a schematic diagram of the steel pipe column connector after adaptation.

[0048] Fig.24 This is a schematic diagram of the state before the straight line segment is converted into the connector plane.

[0049] Fig.25 This is a schematic diagram of the state after the straight line segment is converted into the connecting part plane.

[0050] Fig.26 It is a schematic diagram of the upper left point of the concrete main beam cross section.

[0051] Fig. 27 are schematic diagrams of three independent line loads.

[0052] Fig.28 This is a schematic diagram of the result after superimposing three independent line loads.

[0053] Fig.29 It is a schematic diagram of the additional concentrated load of the line load on the main beam section.

[0054] Fig.30 It is a schematic diagram of characteristic lines of line load position.

[0055] In the figure: 1. Steel pipe column, 2. Column head, 3. Column foot, 4. Unloading block, 5. Connector, 6. Steel pipe column section, 7. Connector plane, 8. Straight line segment, 9. Upper left point of concrete main beam section, 51. Upper horizontal rod, 52. Lower horizontal rod, 53. Connecting plate, 54. Diagonal rod, 81. Generated connector plane. DETAILED DESCRIPTION

[0056] Two points:

[0057] 1. In the process of using functional graphic objects to handle construction technology, the various structural components involved and their representations in the graphic interface are all called "XX objects"; such as: "steel pipe column object", "rod object", "main beam longitudinal section object", "line load object", etc.

[0058] 2. The "preset interface" mentioned in the present invention refers to the preset operation interface in the graphic system or the operation interface of the functional graphic object.

[0059] The present invention will be further described below in conjunction with the accompanying drawings.

[0060] like Fig.15 As shown, the main beam longitudinal section object involved in the present invention ( Fig.15 (a)), main beam section object ( Fig.15 (b)) and the web thickness plane object ( Fig.15 (c)) is to express the concrete main beam structure through the concrete main beam longitudinal section object, main beam cross section object and web thickness plane object, which has the following basic characteristics:

[0061] 1. The main beam longitudinal section object is a functional graphic object used to express the concrete main beam structure. Its geometric figures are composed of vertical segment lines, top plate top and bottom lines, and box beam bottom plate top and bottom lines. The vertical segment lines are used to describe the beam height of the main beam, the top plate thickness is described by the top and bottom lines of the top plate, and the box beam bottom plate thickness is described by the top and bottom lines of the bottom plate. The main beam longitudinal section can be established by forced conversion, that is, first draw the geometric figures of the main beam longitudinal section according to the design data. The geometric figures need to express the vertical segment lines of the main beam longitudinal section, the top or bottom plate top and ground lines, and the top surface line is required to be a horizontal line. The geometric figures of the main beam longitudinal section are merged into blocks and then forced to be converted into concrete main beam longitudinal section objects.

[0062] 2. The main beam section object is a functional graphic object that expresses the cross section of a concrete main beam. The concrete main beam section object can be established through the forced conversion method, that is, first draw the geometric figure of a cross section of the concrete main beam, merge it into a block object, and then force it into a concrete main beam section object.

[0063] 3. Based on the design drawings, a plane figure reflecting the change in web thickness of the concrete main beam section can be drawn. After merging them into blocks, they can be converted into web thickness plane objects.

[0064] 4. Based on the established main beam longitudinal section object, main beam cross section object and web thickness plane object, in the preset interface, the main beam cross section object and web thickness plane object are converted into attribute information and stored in the main beam longitudinal section object, so that the concrete main beam structure can be expressed with one main beam longitudinal section object, and the corresponding concrete main beam structure can be widened and heightened. After deleting the main beam cross section object and web thickness plane object, the main beam longitudinal section object can be directly used in the preset interface to establish the web thickness plane object and the main beam cross section object at any specified cross section position.

[0065] 5. The main beam longitudinal section object has the name, mileage and elevation information of the vertical curve of the line, which can position the concrete main beam at the specified mileage and elevation. At this time, the top surface line vertex of the top plate of the main beam longitudinal section can reflect the design elevation.

[0066] like Fig.16 As shown, the rod object involved in the present invention is a two-dimensional functional graphic object, which has the following basic characteristics:

[0067] 1. A rod object is a steel component commonly used in beam-column brackets such as I-beams, channel steels, and H-beams. It has attribute information such as rod number, name, type, specification, material, length, quantity, and display status. These attribute information can be modified through the preset interface to obtain the required rod object.

[0068] 2. Different types of rods need to be described using corresponding steel specification information, such as I40a, 2[36a, I20a, etc.

[0069] 3. The display status of the rod includes three states: elevation, plane and section. Each display state is independent. Deleting a rod in one display state will not affect the display status of other rods. Fig.16 (a) is the display status of the 2I40 member elevation. Fig.16 (b) is the display status of the 2I40 bar plane. Fig.16 (c) is the display status of the 2I40 bar section.

[0070] 4. Each rod needs to define its corresponding rod name. For example, in the beam-column support scheme, the transverse distribution beam on the steel pipe column is a rod object, and its name can be described by the large crossbeam. The small transverse distribution beam on the main load-bearing beam is also a rod object, and its name can be described by the small crossbeam. When the main load-bearing beam is a steel rod, the name of the rod can be defined as the main load-bearing beam.

[0071] 5. The rod object can be created by forced conversion, that is, first draw a straight line segment representing the centroid axis of the rod, then force it to be converted into a rod object, and then modify the corresponding attribute information through its operation interface to obtain the required rod object.

[0072] 6. The specification of a rod is information that describes its cross-sectional shape and size. For example, by giving the information that the I40a spacing is 40mm, it can be expressed that the specification of the rod is a double I40a I-beam with a clear cross-sectional distance of 40mm.

[0073] 7. Through the preset interface, the length and specifications of a single rod can be modified, and batch modifications can be made to all the rods with the same name in the beam-column support design plan, such as unified modification of the length, specifications and layout spacing of the rods with the same name.

[0074] The Bailey beam object involved in the present invention is a Bailey beam that is connected by pins in the longitudinal direction and lattices or lattices in the transverse direction by 3m, 2m, 1.5m and 1m Bailey plates, and can be used as the main load-bearing beam in the beam-column support system. Its attribute information mainly includes the longitudinal length of the Bailey beam, the transverse spacing, whether it is double-layered, whether it is a reinforcing chord, and the display status.

[0075] like Fig.17 As shown in the figure, the display states of the Bailey beam include three display states: elevation, plane and horizontal. Fig.17 (a) is the elevation display state of the Bailey beam, which can be represented as a Bailey beam elevation object. Fig.17 (b) is the cross-section display state of the Bailey beam, which can be represented as a Bailey beam cross-section object. Fig.17 (c) is the plane display state of the Bailey beam. This figure can be represented as a Bailey beam plane object. The objects in the three display states are independent of each other. Deleting or modifying an object in one display state will not affect objects in other display states.

[0076] The longitudinal length of the Bailey beam can be described by a data format such as 5×3+2+1.5, which means that there are 5 3m standard Bailey plates, one 2m Bailey plate and one 1.5m Bailey plate in the longitudinal direction of the Bailey beam. The corresponding longitudinal length of the Bailey beam is 5×3+2+1.5=18.5m.

[0077] The transverse spacing of Bailey beams is information that can describe the number of transverse rows and spacing of Bailey beams. It can be expressed in a data format such as 0.45+0.45, which means that the Bailey beam is composed of three rows of Bailey beams assembled by lattice, and the spacing between adjacent Bailey beams is 0.45m. The attribute information of Bailey beams can be modified through the corresponding operation interface to obtain the Bailey beams that need to be displayed. Through the operation interface, according to a group of Bailey beam cross-section objects ( Fig.18 (a)), establish a corresponding set of Bailey beam plane objects ( Fig.18 (b)); it can also be based on a set of Bailey beam plane objects ( Fig.18 (b)) and establish a corresponding set of Bailey beam cross-section objects ( Fig.18 (a)).

[0078] like Fig.19 As shown, the steel pipe column object involved in the present invention has the following basic characteristics:

[0079] 1. It has attribute information such as steel pipe number, name, steel pipe specification, length, quantity, display status and position status.

[0080] 2. The display status of steel pipe columns includes two display modes: steel pipe column outline and steel pipe column cross section. The steel pipe specifications include steel pipe diameter and wall thickness information. Fig.19 These are two independent steel pipe column objects, where: Fig.19 (a) is the outline display state of the steel pipe column; Fig.19 (b) is the cross-section display status of the steel pipe column.

[0081] 3. The position state of the steel tube column includes the longitudinal arrangement state and the transverse arrangement state. When the steel tube column is arranged below the longitudinal section of the concrete main beam, the position state of the steel tube column is required to be set to the longitudinal arrangement state; when the steel tube column is arranged below the reference section of the main beam, its position state is the transverse arrangement state.

[0082] 4. By modifying the attribute information of the steel pipe column through the preset interface, you can obtain the required steel pipe size and display status.

[0083] 5. Use the forced conversion method to create the steel pipe column object, that is, first draw a straight line segment reflecting its axis, then force it into a steel pipe column object, and then modify its attribute information on the operation interface to obtain the required steel pipe column object.

[0084] The ground line object involved in the present invention is a functional graphic object expressed by a turning line, and can be created by a forced conversion method, that is, first drawing the turning line of the ground line and then converting it into a ground line object.

[0085] like Fig. 20As shown, a column head 2 is arranged on the upper part of the steel pipe column 1, a removal block 4 is arranged on the top of the steel pipe column 1, and a column foot 3 is arranged on the bottom of the steel pipe column 1.

[0086] like Fig. 20 As shown, the column capital object involved in the present invention is a functional graphic object, which has column capital name information, is arranged on the top of the steel pipe column 1, and describes the facade form of the top steel plate and its reinforcing ribs of the steel pipe column 1. By drawing a two-dimensional geometric column capital shape, it is converted into a column capital object. Various types of column capital objects can be pre-built and stored in the database of the system. On the preset interface, by specifying the column capital name, the required column capital object can be modified.

[0087] like Fig. 20 As shown, the column foot object involved in the present invention is a functional graphic object, which has column foot name information, is arranged at the bottom of the steel pipe column 1, and describes the elevation form of the bottom steel plate and its reinforcing ribs of the steel pipe column 1. By drawing a two-dimensional geometric column foot shape, it is converted into a column foot object. Various types of column foot objects can be pre-built and stored in the system database. On the preset interface, by specifying the column foot name, the required column foot object can be modified.

[0088] like Fig. 20 As shown, the unloading block object involved in the present invention is a functional graphic object, which has the unloading block name and information such as whether it is displayed in a horizontal or vertical state. The unloading block 4 is arranged on the top of the column head 2, and is used to express the description of a device for unloading the bracket. First, a two-dimensional geometric unloading block shape is drawn, and then it is converted into a unloading block object. Various types of unloading block objects can be pre-built and stored in the database of the system. On the preset interface, by specifying the unloading block name, the required unloading block object can be modified.

[0089] The reinforcing rod object of the Bailey beam involved in the present invention is a functional graphic object, which represents the reinforcing device set at the steel pipe column position of the Bailey beam, and is used in the case where the steel pipe column is not arranged at the node position of the Bailey beam and needs to be reinforced. First, draw the two-dimensional reinforcing rod geometry, and then convert it into a reinforcing rod object. Various types of reinforcing rod objects can be pre-built and stored in the system database. On the preset interface, by specifying the name of the reinforcing rod, the required reinforcing rod object can be modified.

[0090] The capping platform object involved in the present invention is a two-dimensional functional graphic object. The capping platform elevation graphics are first drawn, then merged into blocks, and then converted into the capping platform elevation object.

[0091] like Fig.21 As shown, the connector object involved in the present invention has the following basic characteristics:

[0092] 1. The connecting piece 5 is arranged between two adjacent steel pipe columns 1 ( Fig.21 (a)), used to connect the steel pipe column 1. Fig.21 As shown in (b), the connector 5 is composed of an upper horizontal rod 51, a lower horizontal rod 52, an inclined rod 54 and a connecting plate 53. The connector object has attribute information such as name, rod specification, connecting plate size, horizontal rod length, center distance between upper and lower horizontal rods, distance from the center axis of the upper horizontal rod to the top of the steel pipe, and display status.

[0093] 2. On the preset interface, you can modify the property information of the connector object to obtain the required connector. You can also modify some property information of the connector objects in batches to modify the connector objects in batches.

[0094] 3. Connectors include Z-type ( Fig. 22 (a) )、X type( Fig. 22 (c)) and reverse Z-type ( Fig. 22 (b)) These three physical forms, therefore, the connector object also includes these three state display modes. The three connectors 5 are all composed of an upper horizontal rod 51, a lower horizontal rod 52, an inclined rod 54 and a connecting plate 53.

[0095] 4. Based on the basic object of the beam-column support scheme, the connectors between the longitudinally arranged steel pipe columns and the connectors between the transversely arranged steel pipe columns can be automatically generated.

[0096] 5. For steel pipe columns arranged longitudinally or transversely, when the distance between adjacent steel pipe columns is within a certain appropriate range, connectors can be automatically generated. At this time, the corresponding types of connectors can be automatically obtained under the constraints of adjacent steel pipes. When the steel pipe columns are high, multiple connectors can be generated according to the preset vertical spacing, and the required connectors can be obtained through editing operations such as moving and deleting; and then the specification and spacing of the connectors and other attribute information can be batch modified through the preset interface to obtain the required connectors.

[0097] 6. When the layout spacing or specifications of the steel pipe columns are modified, a state before the connection between the steel pipe columns is adapted is obtained ( Fig.23 (a)), you can also modify the connectors in batches through the preset interface, so that the connecting plate 53 in the connector 5 can be connected to the steel pipe column 1, and obtain a state of the connector between the steel pipe columns after self-adaptation ( Fig.23 (b)).

[0098] The connecting piece plane object involved in the present invention has the following basic characteristics:

[0099] 1. A connector plane object is a connector object expressed in a plane graphic that describes the connector between two adjacent steel pipe columns. It has the connector plane name, the structure and layout of the connection between the associated steel pipe columns and other attribute information.

[0100] 2. Structural information refers to the horizontal bar width, horizontal bar center height, node plate size and thickness, connector type, horizontal bar and diagonal bar specifications of the longitudinal or transverse connectors between steel pipe columns. The connector types include X-type, Z-type and reverse Z-type ( Fig. 22 ).

[0101] 3. Layout information refers to the layout distance of the longitudinal connection or transverse connection between the steel pipe columns, that is, the layout distance of each steel pipe connection can be described as the distance from the center axis of the upper horizontal rod to the top of the steel pipe.

[0102] 4. On the preset interface, you can modify the attribute information of the connector plane to describe the connector layout between the two steel pipe columns.

[0103] 5. Draw a straight line segment with both ends intersecting with the relevant steel pipe column section objects. Select the straight line segment and the intersecting steel pipe column section objects, and click the button on the preset interface to convert the straight line segment into a connector plane object. Fig.24 It is the shape before the straight line transformation, where 6 is the cross section of the steel pipe column, 7 is the plane of the connecting part, and 8 is the straight line segment. Fig.25 It is the shape of the connector plane after the straight line segment is transformed, wherein 81 is the connector plane generated after the straight line segment is transformed.

[0104] The concrete strip foundation object involved in the present invention is a two-dimensional functional graphic object, which has attribute information such as cross-sectional size, foundation length, concrete number and display status, wherein the display status includes three state information: elevation, plane and section. When the display status is elevation, the displayed strip foundation is a concrete strip foundation elevation object; when the display status is plane, the displayed strip foundation is a concrete strip foundation plane object; when the display status is section, the displayed strip foundation is a concrete strip foundation section object.

[0105] Strip foundations in different display states are independent functional graphic objects with independent attribute information and display states. You can use attribute editing and modify the display state of concrete strip foundations to obtain the required concrete strip foundation object.

[0106] The square timber object involved in the present invention is a two-dimensional functional graphic object, which has attribute information such as cross-sectional size, rod length, square timber material, square timber strength index and display status, wherein the display status includes three state information: elevation, plane and section. When the display status is elevation, the displayed square timber is a square timber elevation object; when the display status is plane, the displayed square timber is a square timber plane object; when the display status is section, the displayed square timber is a square timber section object.

[0107] The bamboo plywood object involved in the present invention is a two-dimensional functional graphic object, which has attribute information such as cross-sectional size, rod length, bamboo plywood material, strength index and display state, wherein the display state includes three state information of elevation, plane and section. When the display state is elevation, the bamboo plywood displayed is the bamboo plywood elevation object; when the display state is plane, the bamboo plywood displayed is the bamboo plywood plane object; when the display state is section, the bamboo plywood displayed is the bamboo plywood section object.

[0108] like Figure 27-29 As shown, the line load object involved in the present invention has the following basic characteristics:

[0109] 1. Line load object is a functional graphic object that describes distributed loads. It has the name of the line load object, the line load value, additional vertical concentrated load and other attribute information. Based on the established main beam concrete section object, together with the construction loads such as bamboo plywood, crowd equipment, and vibration impact, the values ​​are taken according to the specifications and combined calculations are performed according to a certain combination coefficient. A line load object with a longitudinal beam length of 1m relative to the concrete main beam section can be established.

[0110] 2. On the preset interface, the value of the line load can be adjusted by giving the length.

[0111] 3. On the preset interface, the name of the line load object can be modified by giving it a name.

[0112] 4. In the preset interface, by specifying the area range of the line load, the value of the line load can be modified to adapt to the modification of the load on the flange area of ​​the concrete main beam section; an area range can be specified by giving a distance of 9 ( Fig.26 ) is described by two horizontal distances.

[0113] 5. When multiple line loads are selected, they can be superimposed to obtain superimposed line loads. Fig. 27 In the example, after selecting the A-line load, B-line load and C-line load, click the button on the preset interface to get the superimposed D-line load ( Fig.28 ).exist Fig.28 Adding concentrated load to the line load, we can get Fig.29Schematic diagram of the line load added to the main beam section.

[0114] like Fig.30 As shown, the line load position feature line object involved in the present invention has the following basic characteristics:

[0115] 1. Line load position feature line object is a functional graphic object that describes the position of line load. Its attribute information is mainly the name of the line load object, which is used to associate the corresponding line load object.

[0116] 2. The line load position characteristic line object has a reference point, which is used to express the center position of the concrete main beam section where the small beam corresponding to the object is located.

[0117] 3. The arrow direction of the line load position feature line object indicates the layout direction of the associated line load.

[0118] 4. According to the position of the small beam cross-section object, the corresponding line load position characteristic line can be generated to express the line load borne by the small beam.

[0119] The rapid design method of the beam-column bracket of the present invention comprises the following steps:

[0120] 1. Based on the design and layout data of the pre-built bridge, such as Figure 1 As shown, in the interactive drawing system, the pier elevation L1, the abutment elevation L2, the main beam longitudinal section L3, and the main beam reference section L4 are established. Figure 1 (b))、ground line L5( Figure 1 (a)), the first longitudinal axis L6, the second longitudinal axis L7, the third longitudinal axis L8 and the fourth longitudinal axis L9 and other basic graphic objects. Figure 2 As shown, the four longitudinal axes represent the plane layout relationship of each component: the first longitudinal axis L6 represents the plane layout relationship of the main load-bearing beam, the large beam and the small beam; the second longitudinal axis L7 represents the basic plane layout relationship; the third longitudinal axis L8 represents the layout relationship of the steel pipe column section connection; the fourth longitudinal axis L9 represents the load layout relationship on the small beam. L1~L9 together constitute the basic graphic object of the beam-column bracket design.

[0121] 2. Based on the basic graphic objects of the beam-column support design, an initialization scheme of the beam-column support between the two pier spans of the pre-built bridge is established. The initialization scheme includes the longitudinal arrangement object group and the transverse arrangement object group of the beam-column support, which mainly realizes the longitudinal arrangement scheme and transverse arrangement scheme of the steel pipe column in the beam-column support design scheme. The longitudinal arrangement object group and the transverse arrangement object group of the beam-column support together constitute the scheme object group.

[0122] The component objects in the scheme object group include steel pipe columns, large beams, small beams, main load-bearing beams, concrete strip foundations, square timbers, column heads, column feet, unloading blocks and bamboo plywood. The above-mentioned component objects are all independent functional graphic objects, with attribute information including name, specification, length, material, display status, and professional functions of functional graphic objects. Through the preset interface, these attribute information can be modified or batch modified to obtain the object attribute information required by each object in the scheme object group. Through the professional functions of functional graphic objects, the longitudinal spacing or transverse spacing of each object in the scheme object group can also be adjusted to obtain the required longitudinal layout or transverse layout. The required longitudinal layout and transverse layout of each object can also be obtained through editing operations such as moving, deleting, and copying. When some objects in the scheme object group are not needed, they can be deleted; when they are missing, they can be supplemented to obtain the required scheme objects and layout forms.

[0123] like Figure 3 As shown in (a), the longitudinal arrangement object group of the beam-column support includes steel pipe column S1, large beam section S2, main load-bearing beam facade S3, small beam section S4, longitudinal square wood facade S5, bamboo plywood facade S6, connector S7, column head S8, column foot S9, concrete strip foundation section S10, unloading block S11 and Bailey beam reinforcement rod S12. These component objects are arranged below the longitudinal section of the concrete main beam and between the spans of the adjacent pier facade objects.

[0124] like Figure 3 As shown in (b), the horizontal arrangement object group of the beam-column support includes steel pipe column H1, large beam elevation H2, main load-bearing beam section H3, small beam elevation H4, longitudinal square wood section H5, bamboo plywood section H6, connector H7, column head H8, column foot H9 and concrete strip foundation elevation H10, etc. These component objects are arranged below the concrete main beam reference section.

[0125] The main load-bearing beam of the initialization scheme can be a Bailey beam, or an I-beam, H-beam or other steel member. The length of the main load-bearing beam is the contour range of the adjacent pier facades minus a certain gap so that the main load-bearing beam can be arranged between the spans of the pier facades. When the longitudinally arranged steel pipe columns are arranged on the pedestal, no concrete strip foundation is provided. When the bottom surface of the longitudinal section of the main beam is higher than the ground line L5, a steel pipe lattice consisting of connectors and steel pipe columns is required.

[0126] 3. According to the terrain conditions and technical conditions on site, modify the specifications, dimensions, spacing and other attribute information of each component object such as steel pipe columns, large beams, small beams, main load-bearing beams, concrete strip foundations, square timbers and bamboo plywood in the scheme object group to obtain the desired longitudinal and facade layout forms. You can also use editing operations such as move, delete, copy, replace, and mirror to modify the longitudinal and transverse layout plans of the steel pipe columns in the beam-column bracket.

[0127] 4. Based on the main beam longitudinal section L3 and the longitudinal arrangement object group, establish the finite element calculation model for the main load-bearing beam ( Figure 5 ), and calculate the construction load borne by the main load-bearing beam. The construction load borne by the main load-bearing beam is calculated by taking the values ​​of the formwork, crowd equipment, vibration impact and the self-weight load of the concrete main beam calculated according to the full section according to the specifications, multiplying them by the combination coefficients required by the corresponding specifications, and summing them up to obtain the corresponding line load ( Figure 4 ). The main load-bearing beam is subject to the constraints imposed on it by the steel pipe columns in the longitudinally arranged object group.

[0128] The finite element calculation model of the rod is mechanically calculated to obtain the maximum cross-sectional normal stress, shear stress and maximum vertical displacement borne by the main load-bearing beam. When the main load-bearing beam is a Bailey beam, the maximum chord, diagonal and vertical axial forces borne by the Bailey beam are obtained through mechanical calculation of the finite element calculation model of the rod. Finally, the maximum number of main load-bearing beams required is calculated according to the design value indicators given in the technical specifications.

[0129] 5. According to the maximum number of main load-bearing beams, the main beam reference section L4 is divided into equal load areas so that the construction load values ​​generated in each area are equal. The construction load borne by each area is calculated by taking the values ​​of formwork, crowd equipment, vibration impact and the self-weight load of the concrete main beam calculated by area according to the specifications, multiplying them by the combination coefficients required by the corresponding specifications, and summing them up to obtain the corresponding line load. The equivalent concentrated load of the construction load in each area is arranged in the form of a concentrated load object at the position of its equivalent concentrated load ( Figure 6 ), and then arrange the main load-bearing beam section H3 in the transverse arrangement object group to the position of the concentrated load object, thereby obtaining the adjusted scheme object group.

[0130] 6. Based on the adjusted scheme object group, establish a plan layout including large beams, small beams and main load-bearing beams ( Figure 7 ), the plan layout diagram is a group of beam plane layout objects composed of a large beam plane G1, a small beam plane G2 and a main load-bearing beam plane G3, and its plane position uses the first longitudinal axis L6 as a reference line to represent the plan layout of the beam plane layout object group relative to the beam axis of the concrete main beam.

[0131] When the main load-bearing beam is a steel bar, the main load-bearing beam section H3 is automatically arranged to the concentrated load position obtained by equal load segmentation. When the main load-bearing beam is a Bailey beam, the corresponding Bailey beam cross-section object will be automatically generated according to the lateral distribution of the concentrated load object, and then the professional functions or editing operation methods of the Bailey beam functional image object will be used to fine-tune the lateral spacing of the Bailey beam cross-section object.

[0132] When these beam plane layout object groups cannot fully express the intention of the beam-column support scheme design, the length of a component object in the beam plane layout object group can be further modified through the preset interface. You can also use editing operations such as move, delete, copy, rotate, align, etc. to make appropriate adjustments to them to adapt to the situation where the beam-column support crosses the existing oblique road and handle the construction requirements of the flange area of ​​the pier position, so as to obtain Figure 8 The layout drawing of the adjusted beam layout object group is shown.

[0133] 7. Based on the adjusted scheme object group, establish a plan layout including the column foot plane M2 and the concrete strip foundation plane M1 ( Fig. 9 ), the plan layout diagram is a basic plan layout object group composed of a group of independent column foot planes M2 and concrete strip foundation planes M1. Its plane position is based on the second longitudinal axis L7 of the basic plan layout as the reference line, which is used to represent the plan layout of the basic plan layout object group relative to the beam axis of the concrete main beam. If there is no strip foundation, delete the concrete strip foundation plane M1.

[0134] When these beam foundation plane layout object groups cannot fully express the intention of the beam-column support scheme design, you can use editing operations such as move, delete, copy, rotate, align, etc. to adjust them appropriately to obtain Fig.10 The adjusted beam foundation plan layout object group is shown.

[0135] 8. Based on the adjusted scheme object group, establish a plan layout including the steel pipe column section K1 and the connecting piece plane K2 ( Fig.11 ), the plan layout diagram is a steel tube column section and connector plane object group composed of the steel tube column section K1 and the connector plane K2, and its plane position is based on the third longitudinal axis L8 as the reference line, which is used to represent the plan layout of the steel tube column section and connector plane object group relative to the beam axis of the concrete main beam.

[0136] 9. According to the main beam longitudinal section L3, the main beam reference section L4 and the small beam section S4, establish the line load position characteristic line J1 ( Fig.12 ) and the corresponding transverse line load T1 ( Fig.13 ). The line load position characteristic line J1 is arranged with the third longitudinal axis L8 as the reference line. There are one or more transverse line loads TI, which are used to express the line load type borne by all small beams. Each line load position characteristic line J1 is associated with the corresponding line load type through its line load name attribute.

[0137] When some small beams are subjected to the same line load, a line load object can be used to express it. Each line load position characteristic line J1 is associated with a line load object through its line load name to express the line load borne by the small beam. The load arrangement object group is composed of the transverse line load T1 and the line load position characteristic line J1.

[0138] When the transverse line load at the small beam position also involves concentrated loads, or the local area of ​​the line load needs to be adjusted, special operations for the line load are required to modify and edit the line load in order to obtain a line load type that meets actual needs and can include concentrated loads.

[0139] 10. According to the main beam longitudinal section L3, the main beam reference section L4 and the beam plane layout object group, the steel pipe column section and the connection plane object group and the load layout object group, follow the command stream data format of the international CAE three-dimensional finite element software such as Midas, Ansys or Abaqus, establish the two-dimensional / three-dimensional bar finite element calculation model of the beam-column bracket and the corresponding command stream data of the three-dimensional bar finite element calculation between the beam and column. Perform mechanical calculation on the two-dimensional / three-dimensional bar finite element calculation model, and obtain the mechanical calculation results including strength, stiffness and stability of the designed beam-column bracket.

[0140] 11. Compare the obtained mechanical calculation results with the specification requirements of the beam-column support design scheme. If the specification requirements are not met, modify the component objects in the longitudinal arrangement object group and / or the transverse arrangement object group in the scheme object group by modifying the properties of the component objects, and then repeat steps A3 to A11; until the obtained mechanical calculation results meet the specification requirements, each object group is finally determined.

[0141] 12. Based on the finalized beam plane layout object group, longitudinal layout object group and transverse layout object group, establish the engineering quantity table of the beam-column support design scheme.

[0142] When a design scheme is required for a certain area between the two pier facades L1, a scheme boundary line L11 needs to be set to realize the area between the pier and the adjacent scheme boundary line. At this time, the beam-column bracket design scheme can be for the hole span between the pier facade L1 and the adjacent scheme boundary line L11, or for the hole span between the two adjacent scheme variable boundary lines L11 and the scheme variable boundary line L11, or for the hole span between the scheme boundary line L11 and the pier facade L1 ( Fig.14 ).

[0143] The above steps can quickly complete the longitudinal layout, transverse layout of the beam-column support scheme design and the corresponding two-dimensional / three-dimensional calculation of the beam-column support. The corresponding basic object group, scheme object group, beam plane layout object group, foundation plane layout object group, steel pipe column section and connector plane object group can be used as the content of the beam-column support scheme construction detail drawing. For other local details, such as the inner mold, outer mold, steel pipe column and pier connection, local support treatment on the pier, etc., they can be supplemented by existing commonly used drawing methods; or by pre-establishing a local detail drawing library or a parametric detail drawing library, and then drawing and modifying the local detail drawing library and the parametric detail drawing library, the required design detail drawing of the beam-column support scheme expressed in two-dimensional graphics can be quickly completed.

Claims

1. A rapid design method for beam-column bracket based on functional graphic objects, characterized in that: The following steps are involved: A1. Establish basic graphic objects including pier elevation L1, abutment elevation L2, main beam longitudinal section L3, main beam reference section L4, ground line L5, first longitudinal axis L6, second longitudinal axis L7, third longitudinal axis L8 and fourth longitudinal axis L9 in the interactive drawing system; A2. Based on the basic graphic objects, a longitudinal arrangement object group and a transverse arrangement object group of the beam-column type brackets between the two pier spans of the pre-built bridge are established; the longitudinal arrangement object group and the transverse arrangement object group constitute a scheme object group; the component objects in the scheme object group include steel pipe columns, large beams, small beams, main load-bearing beams, concrete strip foundations, square timbers, column heads, column feet, unloading blocks and bamboo plywood; the above component objects are all independent functional graphic objects, with attribute information including name, specification, length, material and display status, as well as professional functions of functional graphic objects; A3. According to the terrain and technical conditions on site, modify the attribute information of each component object in the scheme object group, including steel pipe columns, large beams, small beams, main load-bearing beams, concrete strip foundations, square timbers and bamboo plywood; modify the longitudinal and transverse layout plans of steel pipe columns by using editing operations including copying, moving and deleting or professional functions of functional graphic objects; A4. Based on the longitudinal section L3 of the main beam and the longitudinal arrangement object group, a finite element calculation model for the main load-bearing beam is established, and the construction load borne by the main load-bearing beam is calculated; the constraint on the main load-bearing beam is the constraint on its support by the steel pipe columns in the longitudinal arrangement object group; The finite element calculation model of the rod is mechanically calculated to obtain the maximum cross-sectional normal stress, shear stress and maximum vertical displacement borne by the main load-bearing beam; when the main load-bearing beam is a Bailey beam, the maximum chord axial force, diagonal rod axial force and vertical rod axial force borne by the Bailey beam are obtained through mechanical calculation of the finite element calculation model of the rod; finally, the maximum number of main load-bearing beams required is calculated according to the design value index given in the technical specifications; A5. According to the maximum number of main load-bearing beams, the main beam reference section L4 is divided into regions with equal loads, and the construction load borne by each region is calculated; the equivalent concentrated load of the construction load of each region is arranged at the position of its equivalent concentrated load in the form of a concentrated load object, and then the main load-bearing beam section in the transverse arrangement object group is arranged at the position of the concentrated load object, thereby obtaining an adjusted scheme object group; A6. Based on the adjusted scheme object group, a plane layout diagram including large beams, small beams and main load-bearing beams is established. The plane layout diagram is a beam plane layout object group consisting of the large beam plane, the small beam plane and the main load-bearing beam plane. The plane position is based on the first longitudinal axis L6 as the reference line, which is used to represent the plane layout of the beam plane layout object group relative to the beam axis of the concrete main beam; A7. Based on the adjusted scheme object group, a plane layout diagram including the column foot plane and the concrete strip foundation plane is established. The plane layout diagram is a foundation plane layout object group composed of a group of independent column foot planes and concrete strip foundation planes. The plane position is based on the second longitudinal axis L7 as the reference line, which is used to represent the plane layout of the foundation plane layout object group relative to the beam axis of the concrete main beam; A8. Based on the adjusted scheme object group, a plan layout diagram including the steel tube column section and the connector plane is established. The plan layout diagram is a steel tube column section and connector plane object group composed of the steel tube column section and the connector plane. The plane position is based on the third longitudinal axis L8 as the reference line, which is used to represent the plan layout of the steel tube column section and connector plane object group relative to the beam axis of the concrete main beam; A9. According to the main beam longitudinal section L3, the main beam reference section L4 and the small cross beam section, a line load position characteristic line J1 indicating the load arrangement position on the small cross beam and a corresponding transverse line load T1 are established. The line load position characteristic line J1 is arranged with the third longitudinal axis L8 as the reference line; the transverse line load T1 and the line load position characteristic line J1 constitute a load arrangement object group; A10. Establish a two-dimensional / three-dimensional bar finite element calculation model for the designed beam-column bracket based on the main beam longitudinal section L3, the main beam reference section L4 and the beam plane layout object group, the steel pipe column section and the connecting piece plane object group and the load layout object group; Perform mechanical calculations on the two-dimensional / three-dimensional bar finite element calculation model to obtain the mechanical calculation results of the designed beam-column bracket, including strength, stiffness and stability; A11 compares the obtained mechanical calculation results with the specification requirements of the beam-column bracket design scheme. If the specification requirements are not met, the component objects in the longitudinal arrangement object group and / or the transverse arrangement object group in the scheme object group are modified by modifying the attributes of the component objects, and steps A3 to A11 are repeated until the obtained mechanical calculation results meet the specification requirements and each object group is finally determined; A12. Establish the engineering quantity table of the beam-column support design scheme based on the final determined beam plane layout object group, longitudinal layout object group and transverse layout object group.

2. The rapid design method of beam-column bracket according to claim 1 is characterized in that: The first longitudinal axis L6 represents the plane layout relationship of the main load-bearing beam, large beam and small beam; the second longitudinal axis L7 represents the plane layout relationship of the foundation; the third longitudinal axis L8 represents the layout relationship of the cross-section connection of the steel pipe column; the fourth longitudinal axis L9 represents the load layout relationship on the small beam.

3. The rapid design method of beam-column bracket according to claim 1 is characterized in that: The longitudinally arranged object group includes steel pipe columns, large beam sections, main load-bearing beam facades, small beam sections, longitudinal square wood facades, bamboo plywood facades, connectors, column heads, column bases, concrete strip foundation sections, unloading blocks and Bailey beam reinforcement rods; these component objects are arranged below the longitudinal section of the concrete main beam.

4. The rapid design method of beam-column bracket according to claim 1 is characterized in that: The horizontally arranged object group includes steel pipe columns, large beam facades, main load-bearing beam sections, small beam facades, longitudinal square wood sections, bamboo plywood sections, connectors, column heads, column bases and concrete strip foundation facades; these component objects are arranged below the concrete main beam reference section.

5. The rapid design method of beam-column bracket according to claim 1 is characterized in that: The construction load borne by the main load-bearing beam in step A4 is calculated by taking the values ​​of the formwork, crowd equipment, vibration impact and the self-weight load of the concrete main beam calculated based on the full cross-section according to the specifications, multiplying them by the combination coefficients required by the corresponding specifications, and then adding them up.

6. The rapid design method of beam-column bracket according to claim 1 is characterized in that: The construction load borne by each area in step A5 is calculated by taking the values ​​of formwork, crowd equipment, vibration impact and the self-weight load of the concrete main beam calculated by area according to the specifications, multiplying them by the combination coefficients required by the corresponding specifications, and then adding them up.

7. The rapid design method of beam-column bracket according to claim 1 is characterized in that: In step A6, when the main load-bearing beam is a steel bar, the cross section of the main load-bearing beam is automatically arranged to the concentrated load position obtained by equal load division; when the main load-bearing beam is a Bailey beam, the corresponding Bailey beam cross-section object is automatically generated according to the lateral distribution of the concentrated load object, and then the lateral spacing of the Bailey beam cross-section object is fine-tuned by using the professional functions or editing operations of the Bailey beam functional image object.

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