A method for quickly constructing a three-dimensional steel bar model of a concrete bridge structure

Abstract

The present invention discloses a method for rapidly constructing a three-dimensional steel bar model of a concrete bridge structure. Specifically, the method rapidly constructs a three-dimensional steel bar BIM model of a concrete bridge structure by establishing a three-dimensional BIM model of a concrete bridge structure, a main structure, a steel bar shape template, a layout surface, a positioning feature line and other functional graphic objects in a graphic system, and can rapidly generate a large-scale drawing of each steel bar and a steel bar quantity table, thereby achieving simplification, standardization and high efficiency of the three-dimensional steel bar BIM modeling of the bridge concrete structure, and having good adaptability, which is conducive to the implementation of digital bridge steel bar construction and the potential tapping and efficiency improvement of steel bar construction. The three-dimensional steel bar rapid BIM modeling method of the present invention is also suitable for three-dimensional steel bar modeling of other concrete structures such as tunnels, culverts, dam bodies, and foundations.

Description

Technical Field

[0001] The invention relates to a construction method of a bridge project, in particular to a rapid construction method of a three-dimensional steel bar model of a concrete bridge structure. Background Art

[0002] In bridge construction, the steel bar in the concrete structure is an important main material, accounting for a huge economic volume. The level of its construction digitalization technology directly affects the overall technical level of bridge construction digitalization. The digitalization of bridge steel bar construction is also a key research technology for tapping the potential and increasing efficiency of bridge construction today. Project construction units currently generally use tools such as AutoCAD, Excel, and even notebooks to cut and mix steel bars. Although this can complete the relevant steel bar work, it is easy to find errors in the design of steel bar samples, inaccurate cutting of some steel bars, low work efficiency, rework due to errors in steel bar installation, delays in construction period, poor management, and cost waste.

[0003] BIM (Building Information Modeling) technology is a technology for building and applying models that uses graphics as a carrier and can load or associate a large amount of relevant engineering information. This technology is a key technology in the field of digital technology in intelligent bridge construction technology.

[0004] The key to bridge reinforcement digitalization technology lies in the construction of a three-dimensional BIM model of complex bridge reinforcement and its in-depth application in reinforcement cutting, batching and management. Although existing BIM technology and some commercial reinforcement software have been studied and applied in bridge reinforcement digitalization technology, there is still a lack of solutions for three-dimensional reinforcement modeling that can be easily applied. Therefore, for the three-dimensional modeling of reinforcement in complex bridge structures, there are still problems such as high modeling difficulty, high cost and low efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a method for quickly constructing a three-dimensional steel bar model of a concrete bridge structure, so as to solve the problems of great modeling difficulty, high cost and low efficiency in the existing bridge steel bar digitalization technology.

[0006] The object of the present invention is achieved in that:

[0007] A method for quickly constructing a three-dimensional steel bar model of a concrete bridge structure comprises the following steps:

[0008] S1. According to the design data of the reinforced concrete structure of the bridge, the three-dimensional geometric model object of the bridge concrete structure is established by using the three-dimensional geometric modeling function of the BIM system.

[0009] S2. Using the forced transformation method, the three-dimensional geometric model object of the bridge concrete structure is transformed into a two-dimensional concrete main structure object.

[0010] S3. According to the layout characteristics of each numbered steel bar in the bridge reinforced concrete structure design data, the steel bar shape template object of each numbered steel bar is established by using the forced transformation method, and the geometric dimensions of the steel bar template in the steel bar shape template object are observed; if the geometric dimensions of the steel bar template are different, the variable parameters of the steel bar shape template object are set according to the variation law of the geometric dimensions and the local coordinate system in the steel bar shape template object; if the geometric dimensions are the same, there is no need to set the variable parameters.

[0011] S4. According to the layout characteristics of each numbered steel bar in the design data of the bridge reinforced concrete structure, a layout surface object of a certain numbered steel bar is established by making a section surface on the main structure; and a layout surface object is established for each numbered steel bar in this way; if the section surfaces of the main structure corresponding to steel bars with different numbers are the same, then these numbered steel bars share a common layout surface object.

[0012] S5. Create a positioning feature line object of each numbered steel bar within the contour range of the layout surface object of the numbered steel bar; and set the attribute information of the layout feature of the numbered steel bar on the preset interface of the positioning feature line object.

[0013] S6. On the preset interface of the concrete main structure object, the positioning feature line objects corresponding to each layout surface object are summarized; and according to the positioning feature line objects, steel bar shape template objects and layout surface objects corresponding to each numbered steel bar, as well as their respective attribute information, a steel bar quantity table and a three-dimensional steel bar model of each numbered steel bar are established.

[0014] S7. Create a steel bar detail drawing of each numbered steel bar based on the three-dimensional steel bar model of each numbered steel bar.

[0015] The present invention is implemented by creating and operating functional graphic objects, which have the following basic characteristics:

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] The present invention can quickly construct the three-dimensional steel bar model, steel bar detail drawing and steel bar quantity table of each numbered steel bar in the concrete main structure in the design data by establishing the three-dimensional geometric model object, main structure object, steel bar shape template object, layout surface object, positioning feature line object and other functional graphic objects of the bridge concrete structure in the BIM system, thereby realizing the BIM modeling of the three-dimensional steel bar model of the bridge reinforced concrete structure, and realizing the simplification, standardization and high efficiency of the modeling process. The modeling method of the present invention has good adaptability, which is conducive to the refined management and control of bridge engineering construction projects and the potential tapping and efficiency improvement of construction enterprises.

[0022] The three-dimensional steel bar BIM rapid modeling method of the present invention is also applicable to three-dimensional steel bar modeling of other concrete structures such as tunnels, culverts, dam bodies, foundations, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of a three-dimensional geometric model object displayed in two dimensions; among them, (a) is the front view; (b) is the top view; (c) is the left view; and (d) is the bottom view.

[0024] Figure 2 It is a real three-dimensional geometric diagram of the three-dimensional geometric model object.

[0025] Figure 3It is a schematic diagram of the main structural object; among them, (a) is the top view; (b) is the front view; and (c) is the left view.

[0026] Figure 4 It is a two-dimensional schematic diagram of the layout surface object.

[0027] Figure 5 It is a schematic cross-sectional view of the real three-dimensional geometric figure of the main structure object at the longitudinal center position.

[0028] Figure 6 It is a schematic diagram of variable parameters of the reinforcement shape template.

[0029] Figure 7 yes Figure 6 Schematic diagram showing the status of the 3D steel bar model corresponding to the steel bar shape template object in the 3D geometry of the main structure.

[0030] Figure 8 It is a schematic diagram of the positioning feature line object that is within the outline range of the layout surface object and is perpendicular to the layout surface object.

[0031] Fig. 9 It is a schematic diagram of the section surface corresponding to the layout surface object in the three-dimensional geometric figure of the main structure, which is described by the three-dimensional reinforcement model described by the positioning feature line object perpendicular to the layout surface object within the outline range of the layout surface object.

[0032] Fig.10 It is a schematic diagram of the positioning feature line object within the outline range of the layout surface object and parallel to the layout surface object face.

[0033] Fig.11 It is a schematic diagram of the section corresponding to the layout surface object in the three-dimensional geometric figure of the main structure, which is described by the positioning feature line object within the outline range of the layout surface object and parallel to the layout surface.

[0034] Fig.12 It is the three-dimensional geometric figure of the main structure object displayed on the preset interface of the main structure object and the summarized three-dimensional steel bar model schematic diagram. DETAILED DESCRIPTION

[0035] Two points:

[0036] 1. In the process of using functional graphic objects to handle construction technology, the various structural components involved and the representations of the structural components in the graphic interface are all called "XX objects"; such as: "main structure object", "layout surface object", "positioning feature line object", etc.

[0037] 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.

[0038] The present invention involves concepts such as three-dimensional geometric model objects, main structure objects, layout surface objects, steel bar shape templates, and positioning feature line objects, which are specifically described as follows:

[0039] 1. A 3D geometric model object is a 2D functional graphic object with the following basic features:

[0040] (1) By using the basic geometric modeling functions such as stretching, fusion, lofting, hollowing, shearing, merging, rotation, and chamfering provided by the BIM graphics system, a three-dimensional geometric model object of the reinforced concrete structure of the bridge can be constructed.

[0041] (2) The constructed three-dimensional geometric model object can be displayed in the graphics system in the form of a two-dimensional top view, bottom view, front view, back view, left view or right view. The real three-dimensional geometric figure can be displayed on the preset interface, and the real three-dimensional geometric figure can be rotated, roamed, captured, and the view is transformed. Figure 1 (a), (b), (c), and (d) are respectively the display modes of the front view, top view, left view, and bottom view of the three-dimensional geometric model object displayed in two dimensions. Figure 1 The real 3D geometry of the 3D geometric model object is as follows Figure 2 shown.

[0042] 2. The main structure object is a two-dimensional functional graphic object with the following basic characteristics:

[0043] (1) If Figure 3 As shown in the figure, the main structure object is a functional graphic object expressed in a two-dimensional three-view format in the graphics system. Figure 3 (b) The front view shown, Figure 3 (c) The left view and Figure 3 The top view shown in (a) together constitutes a two-dimensional main structure object.

[0044] like Figure 2 As shown, the main structure object is a container object for managing and querying the main structure's three-dimensional geometric figures and three-dimensional steel bar models. The name attribute of the main structure object can be set on its preset interface. Through operation commands, the corresponding real three-dimensional geometric figures and three-dimensional steel bar models can be displayed, and the steel bar templates and steel bar quantity tables corresponding to all three-dimensional steel bar models can be established in the graphic system; through the selection of color and steel bar number, the three-dimensional model of the selected steel bar can be opened or closed, so that the three-dimensional steel bar model can be selectively displayed, queried and viewed in different views.

[0045] (2) The method of establishing the main structure object is: select the three-dimensional geometric model object and force it to be converted into the main structure object.

[0046] 3. The layout surface object is a two-dimensional functional graphic object with the following basic characteristics:

[0047] (1) A layout surface object has attributes such as the layout surface name, the name of the main structure object to which it belongs, the number and spacing of parallel layout surfaces, etc. The attribute information of the layout surface object can be modified through the preset interface.

[0048] (2) The method of establishing a layout surface object is: draw a valid straight line segment, which must have an intersection with the front view, top view or left view of the main structure object, and use the section plane representing the position of the straight line segment to cut the real three-dimensional geometric figure of the main structure object to obtain the section plane, and then select the straight line segment and the main structure object at the same time to establish a corresponding layout surface object representing the section plane of the real three-dimensional geometric figure and expressed in two-dimensional graphics. When the number of parallel surfaces in the attribute information of the parallel layout surface of the layout surface object is not 0 and the corresponding spacing value is given, it means that the obtained two-dimensional layout surface object is a set of parallel section planes arranged at a certain spacing.

[0049] The vertical straight line segment L1 is Figure 3 (c) The left view of the main structure object intersects, and we get Figure 4 The two-dimensional layout surface object shown in the figure represents Figure 5 The real three-dimensional geometry of the main structural object shown is a cross-section at the longitudinal center position.

[0050] 4. The steel bar shape template is a two-dimensional functional graphic object with the following basic characteristics:

[0051] (1) Each steel bar in the main structure object has its own geometric shape and corresponding size, and the actual steel bar template needs to be expressed through geometric shape and size. Steel bar templates of a certain number have the same geometric shape, but the size is not exactly the same. This geometric figure that describes the geometric shape and size variation of the steel bar is the steel bar shape template. The steel bar shape template represents the common shape and size variation of a certain number of steel bar types in the main structure.

[0052] (2) The steel bar shape template has attribute information such as name, steel bar specification, steel bar material, starting hook, end hook, hook direction, local coordinate system, geometric shape type, and shape parameters.

[0053] (3) When the steel bar shape template is a combination line composed of straight line segments and arc segments, the endpoints of all line segments constitute a set of control points of the combination line. The combination line can be obtained by connecting line segments in sequence. The corresponding shape parameters are the three-dimensional coordinates (X, Y, Z) and the curvature radius R of the group of control points in the local coordinate system. When the coordinate Z of all control points is 0 or the value is equal, the shape template becomes a two-dimensional shape template; otherwise, it is a three-dimensional shape template. When the curvature radius of the control point of the combination line is 0, it indicates that the line connecting the current control point and the previous control point is a straight line segment; when the curvature radius is not 0, it indicates that the line connecting the current control point and the previous control point is an arc curve segment.

[0054] (4) When the steel bar shape template is a circular steel bar shape, its shape parameters are the circle radius and the lap length.

[0055] (5) Based on a certain numbered steel bar sample provided by the design data, draw a two-dimensional geometric figure of the numbered steel bar, and then use the forced conversion method to convert it into a steel bar shape template, thereby obtaining an initial steel bar shape template with a local coordinate system; then set the steel bar attribute information on the preset interface, and modify the origin position of the local coordinate system to the set position to obtain the required steel bar shape template. For the steel bar shape template of circular steel bars or spiral bars, the parametric method can be used to establish it.

[0056] (6) The origin of the local coordinate system is also called the base point. The base point of the steel bar shape template obtained by forced transformation is the initial position. The base point position needs to be modified according to the positional relationship between the steel bar shape template and the layout surface. The specific operation method is to move the base point to the set position by dragging the mouse or setting the horizontal and vertical distance increments. The change of the base point position will lead to the change of the control point coordinates, but will not change the geometric shape of the steel bar shape template.

[0057] (7) Shape parameters can be fixed values, and the corresponding steel bar shape template is called a fixed steel bar shape template. Shape parameters can also be variable, and the corresponding steel bar shape template is called a variable parameter steel bar shape template. For a fixed steel bar shape template, its geometric dimensions are fixed, and the geometric dimensions of a certain number of steel bar templates in the main structure are also fixed. For a variable parameter steel bar shape template, one or more variable parameters are needed to express its shape parameters, and the geometric dimensions of a certain number of steel bar templates in the main structure vary according to these variable parameters. They vary with the change of the position of the steel bar in the main structure, and the corresponding geometric dimensions of the steel bar templates are also different.

[0058] The following table is Figure 6 A list of control point parameters used by the rebar shape template, including the four parameters DL, H1, H2 and D1.

[0059]

[0060] In this table, DL is the bottom width of the box beam minus the thickness of the steel bar cover; H1 is the main height of the vertical steel bar segment minus the thickness of the cover; H2 and D1 are used to express the changing law of the steel bar segment. The variable parameters DL, H1, H2 and D1 with changed values ​​are used to express a group of steel bars with the same shape but whose size is constrained by the outline of the main structure or changes with the spacing. Figure 6 The status of the 3D steel bar model corresponding to the steel bar shape template object in the 3D geometry of the main structure is shown as follows: Figure 7 shown.

[0061] (8) When the steel bar shape template is composed of straight segments and circular curves and is a three-dimensional steel bar shape template, it is necessary to set the value or change parameter of the Z coordinate.

[0062] 5. The positioning feature line object is a two-dimensional functional graphic object with the following basic features:

[0063] (1) The positioning feature line object is a two-dimensional functional graphic object arranged within the outline of the layout surface object. Through the joint application of the positioning feature line object and the layout surface object, the steel bar samples of a certain number of steel bars in the main structure object and the corresponding three-dimensional steel bar model can be described.

[0064] (2) The positioning feature line object has positioning information such as positioning method, positioning base point, reinforcement spacing sequence, reinforcement shape template name, surface offset, etc., and also has other information such as reinforcement number and reinforcement color. The positioning information and other information together constitute the attribute information of the positioning feature line. The reinforcement number corresponds to the reinforcement group of a certain reinforcement number expressed in the design data, the reinforcement shape template name is used to express the reinforcement shape template associated with the reinforcement group, and the reinforcement spacing sequence is used to express the spacing sequence of each reinforcement in the reinforcement group.

[0065] (3) The method of establishing a positioning feature line object is: first draw a straight line segment, then select the straight line segment and force it to be converted into a positioning feature line object. On the preset interface, modify the attribute information of the positioning feature line, and then according to the position of the steel bar group in the main structure, through the geometric operations of functional graphic objects such as moving, rotating, and mirroring, arrange the positioning feature line to the corresponding position of the layout surface object.

[0066] (4) On the preset interface, set the value of the shape template parameter in the attribute information of the positioning feature line object. Based on the feature line object and its attribute information, the corresponding layout surface and its associated main structure object, you can obtain the steel bar pattern, steel bar quantity table and three-dimensional steel bar model of the relevant numbered steel bars described by the feature line object and its attribute information consistent with the design data.

[0067] For fixed steel bar shape templates, the parameters of the steel bar shape template are fixed values ​​and do not change with the change of the position of the steel bars in the steel bar group. For variable parameter steel bar shape templates, the steel bar shape template involves one or more variable parameters, which change with the change of the steel bar spacing position. The specific parameter values ​​can be expressed in the way described by Python language, so that the variable parameters in the steel bar shape template are automatically calculated and processed due to the different positions of the steel bars.

[0068] To implement the method of using Python language to express and calculate the values ​​of one or more variable parameters involved in the steel bar shape template, it is necessary to provide some built-in functions described in Python language on the preset interface to calculate some dimension values ​​related to the main structure surface, such as the function of calculating the length of the line segment obtained by the steel bar shape template corresponding to each steel bar in a certain numbered steel bar group extending to both ends in the X and Y axis directions of its local coordinate system and intersecting with the surface of the main structure object. It is also necessary to provide some other built-in functions to facilitate the implementation of using Python language to express and calculate the values ​​of one or more variable parameters involved in the steel bar shape template.

[0069] (5) The positioning methods of the positioning feature line object include parallel surface layout and vertical surface layout. For vertical surface layout, the positioning feature line is composed of dots and arrow lines. Each dot represents the base point of a steel bar shape template perpendicular to the layout surface, and the arrow direction represents the X direction of the steel bar shape template. For parallel surface layout, the positioning feature line is displayed as a line segment group with dots and arrow directions. The dots on the arrow line represent the base points of the steel bar shape template, and the arrow direction represents the X direction of the steel bar shape template. When the number of parallel surfaces in the parallel layout surface attribute information of the layout surface object is not 0 and the corresponding spacing value is given, the line segment group of the positioning feature line object expresses that a certain number of steel bars are arranged in batches according to the attribute information of the feature line on a set of parallel section surfaces arranged at a certain spacing.

[0070] Figure 8 In the figure, B1 is the layout surface object, and W1 is the positioning feature line of the vertical surface layout. Through the layout surface B1 and the positioning feature line W1 and the steel bar shape template described in their attribute information, the preset interface can be queried. Fig. 9 The real three-dimensional geometric figure of the main structure, the cross-section figure B11 and a set of three-dimensional steel bar models R1 perpendicular to the layout surface B1 are shown.

[0071] Fig.10 In the example, B1 is the layout surface, W1 is the positioning feature line of the parallel layout mode, and the reinforcement shape template described in the layout surface B1 and the positioning feature line W1 and their attribute information can be queried on the preset interface. Fig.11The real three-dimensional geometric figure of the main structure, the cross-section figure B11 and a set of three-dimensional steel bar models R1 parallel to the layout surface B1 are shown.

[0072] 6. The main structure object, layout surface object, positioning feature line object and reinforcement shape template object in the present invention need to be used in combination to establish reinforcement templates, three-dimensional reinforcement models and reinforcement quantity tables for each numbered reinforcement in the main structure object.

[0073] (1) Based on the reinforcement layout design data of the main structure, it is necessary to establish several layout surface objects, and it may be necessary to establish several positioning feature line objects on a layout surface.

[0074] (2) On the preset interface of the positioning feature line object, you can set its attribute information, query the three-dimensional steel bar model associated with the specified steel bar shape template name, and establish the corresponding steel bar template and steel bar quantity table.

[0075] (3) On the preset interface of the layout surface object, you can query the three-dimensional steel bar model associated with all the positioning feature lines within the contour range of a layout surface, and establish the corresponding steel bar template and steel bar quantity table.

[0076] (4) On the preset interface of the main structure object, the attribute information of all positioning feature line objects within the contour range of all associated layout surface objects can be extracted to establish Fig.12 The three-dimensional steel bar model is shown; and by querying the three-dimensional steel bar model, the corresponding steel bar sample and the steel bar quantity table as shown in the following table can be established.

[0077]

[0078] The method for quickly constructing a three-dimensional steel bar model of a concrete bridge structure of the present invention comprises the following steps:

[0079] S1. According to the design data of the reinforced concrete structure of the bridge, the three-dimensional geometric model object of the bridge concrete structure is established by using the three-dimensional geometric modeling function of the BIM system.

[0080] S2. Using the forced transformation method, the three-dimensional geometric model object of the bridge concrete structure is transformed into a two-dimensional concrete main structure object.

[0081] S3. According to the layout characteristics of each numbered steel bar in the bridge reinforced concrete structure design data, the steel bar shape template object of each numbered steel bar is established by using the forced transformation method, and the geometric dimensions of the steel bar template in the steel bar shape template object are observed; if the geometric dimensions of the steel bar template are different, the variable parameters of the steel bar shape template object are set according to the variation law of the geometric dimensions and the local coordinate system in the steel bar shape template object; if the geometric dimensions are the same, there is no need to set the variable parameters.

[0082] S4. According to the layout characteristics of each numbered steel bar in the design data of the bridge reinforced concrete structure, a layout surface object of a certain numbered steel bar is established by making a section surface on the main structure; and a layout surface object is established for each numbered steel bar in this way; if the section surfaces of the main structure corresponding to steel bars with different numbers are the same, then these numbered steel bars share a common layout surface object.

[0083] S5. Create a positioning feature line object of each numbered steel bar within the contour range of the layout surface object of the numbered steel bar; and set the attribute information of the layout feature of the numbered steel bar on the preset interface of the positioning feature line object.

[0084] S6. On the preset interface of the concrete main structure object, the positioning feature line objects corresponding to each layout surface object are summarized; and according to the positioning feature line objects, steel bar shape template objects and layout surface objects corresponding to each numbered steel bar, as well as their respective attribute information, a steel bar quantity table as shown in the following table and a three-dimensional steel bar model of each numbered steel bar are established.

[0085] S7. Create a steel bar detail drawing of each numbered steel bar based on the three-dimensional steel bar model of each numbered steel bar.

Claims

1. A method for quickly constructing a three-dimensional steel bar model of a concrete bridge structure, characterized in that: The following steps are involved: S1. Based on the design data of the reinforced concrete structure of the bridge, the three-dimensional geometric model object of the bridge concrete structure is established by using the three-dimensional geometric modeling function of the BIM system; S2, using a forced transformation method, transforming the three-dimensional geometric model object of the bridge concrete structure into a two-dimensional concrete main structure object; S3. According to the layout characteristics of each numbered steel bar in the bridge reinforced concrete structure design data, a steel bar shape template object of each numbered steel bar is established by using a forced transformation method, and the geometric dimensions of the steel bar template in the steel bar shape template object are observed; if the geometric dimensions of the steel bar template are different, the variable parameters of the steel bar shape template object are set according to the variation law of the geometric dimensions and the local coordinate system in the steel bar shape template object; if the geometric dimensions are the same, there is no need to set the variable parameters; S4. According to the layout characteristics of each numbered steel bar in the design data of the bridge reinforced concrete structure, a layout surface object of a certain numbered steel bar is established by making a section surface on the main structure; and a layout surface object is established for each numbered steel bar in this way; if the section surfaces of the main structure corresponding to steel bars with different numbers are the same, then these numbered steel bars share a layout surface object; S5. within the contour range of the layout surface object of each numbered steel bar, establish a positioning feature line object of the numbered steel bar; and set the attribute information of the layout feature of the numbered steel bar on the preset interface of the positioning feature line object; S6. On the preset interface of the concrete main structure object, the positioning feature line objects corresponding to each layout surface object are summarized; and according to the positioning feature line objects, the steel bar shape template objects and the layout surface objects corresponding to each numbered steel bar, and their respective attribute information, a steel bar quantity table and a three-dimensional steel bar model of each numbered steel bar are established; S7. Create a steel bar detail drawing of each numbered steel bar based on the three-dimensional steel bar model of each numbered steel bar.

Images