Railway bridge engineering model parameter constraint modeling method and device

Abstract

The application provides a railway bridge engineering model parameter constraint modeling method and device, the method comprises the following steps: preparing a component family of a BIM model, the component family is used for defining target attributes of all components in the BIM model and a connection relationship between different components, the target attributes comprise coordinate attributes, size attributes, material attributes and construction stage attributes; determining engineering parameters, the engineering parameters comprise coordinate information of a bridge, a main beam and a pile foundation, and size information, material information and construction stage information of all components; modifying values of the target attributes of all components in the component family according to the engineering parameters, and establishing the BIM model; determining information of corresponding units in a finite element model according to the values of the target attributes of all components in the BIM model, and establishing the finite element model. Through the application, the establishment of the BIM model and the finite element model is automatically and quickly completed based on parameters, which is helpful for saving time and resources, timely feeding back the model to a construction site, and reducing safety hazards.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of railway bridge engineering, and in particular to a railway bridge engineering model parameter constraint modeling method and device. BACKGROUND

[0002] In railway bridge engineering, whether in the survey and design stage or the construction stage, a BIM model plays an increasingly important role, and a finite element model corresponding to a design scheme is an important basis for ensuring the safety of the design scheme or the construction scheme.

[0003] At present, for the BIM model and the finite element model of railway bridge engineering, a manual modeling method based on drawings is usually adopted, and when the bridge scheme changes, the BIM model and the finite element model of the structure need to be re-established, which consumes a large amount of time and resources. If the finite element model cannot be fed back to the construction site in time, it is easy to cause safety hazards. SUMMARY

[0004] The main purpose of the present application is to provide a railway bridge engineering model parameter constraint modeling method and device, which aims to solve the technical problem of consuming a large amount of time and resources in the prior art based on the manual modeling method of drawings.

[0005] In a first aspect, the present application provides a railway bridge engineering model parameter constraint modeling method, which comprises:

[0006] Making a component family of a BIM model, the component family being used to define target attributes of all components in the BIM model and connection relationships between different components, the target attributes including coordinate attributes, size attributes, material attributes and construction stage attributes;

[0007] Determining engineering parameters, the engineering parameters including coordinate information of a bridge, a main beam and a pile foundation, and size information, material information and construction stage information of all components;

[0008] Modifying values of the target attributes of all components in the component family according to the engineering parameters, and establishing a BIM model;

[0009] Determining information of corresponding units in a finite element model according to the values of the target attributes of all components in the BIM model, and establishing a finite element model.

[0010] Optionally, the step of determining engineering parameters comprises:

[0011] Obtaining input engineering parameters through a graphical user interface;

[0012] Checking the input engineering parameters;

[0013] If the check fails, an error prompt is output, and the step of obtaining the engineering parameters through the graphical user interface is returned to.

[0014] Optionally, the step of modifying the values of the target attributes of all components in the component family according to the engineering parameters comprises:

[0015] According to the coordinate information of the bridge, the main girder and the pile foundation in the engineering parameters, and the connection relationship between different components in the component family, the coordinate information of all components in the component family is calculated.

[0016] According to the calculated coordinate information of all components in the component family, the coordinate attribute values of the components are modified to place the components in the BIM software.

[0017] According to the size information, material information and construction stage information of all components in the engineering parameters, the size attribute, material attribute and construction stage attribute values of the placed components are modified to obtain the BIM model.

[0018] Optionally, the step of determining the information of the corresponding unit in the finite element model according to the values of the target attributes of all components in the BIM model comprises:

[0019] The values of the target attributes of all components in the BIM model are obtained by traversing the BIM model.

[0020] According to the values of the coordinate attributes of all components in the BIM model, the node composition information and node coordinate information of the corresponding unit in the finite element model are determined.

[0021] According to the values of the size attribute and material attribute of all components in the BIM model, the size information and material information of the corresponding unit in the finite element model are determined.

[0022] According to the node composition information, node coordinate information, size information and material information of all units in the finite element model, the finite element model is established.

[0023] Optionally, after the step of determining the information of the corresponding unit in the finite element model according to the values of the target attributes of all components in the BIM model, the step of establishing the finite element model further comprises:

[0024] The components in the BIM model and the units in the finite element model are mapped to each other, so that the modification of the BIM model is fed back to the finite element model.

[0025] Optionally, the step of mapping the components in the BIM model and the units in the finite element model comprises:

[0026] determining a target element in a cell of the finite element model, and determining a target component corresponding to the target element in the BIM model;

[0027] establishing a one-to-one mapping relationship between other components in the BIM model except the target component and other corresponding cells in the finite element model except the target element;

[0028] segmenting the target element into a plurality of sub-elements;

[0029] establishing a one-to-many mapping relationship between the target component in the BIM model and the plurality of sub-elements in the finite element model.

[0030] Optionally, after the step of establishing the finite element model according to the values of the target attributes of all components in the BIM model to determine the information of the corresponding cells in the finite element model, the method further comprises:

[0031] adding constraint conditions and boundary conditions in the finite element model.

[0032] Optionally, the step of adding constraint conditions and boundary conditions in the finite element model comprises:

[0033] adding a common node constraint between different segments of the main beam, adding a rigid connection constraint between the cable and the main beam, and between the cable and the tower, and adding an elastic constraint between the main beam and the tower according to the structural system;

[0034] adding a soil spring constraint to the pile foundation according to the soil information, and adding an elastic constraint to the two ends of the main beam according to the support information.

[0035] Optionally, after the step of establishing the finite element model according to the values of the target attributes of all components in the BIM model to determine the information of the corresponding cells in the finite element model, the method further comprises:

[0036] adding load information in the finite element model.

[0037] In a second aspect, the present application further provides a railway bridge engineering model parameter constraint modeling device, which comprises:

[0038] a component family making module for making a component family of the BIM model, the component family being used to define target attributes of all components in the BIM model and connection relationships between different components, the target attributes including coordinate attributes, size attributes, material attributes and construction stage attributes;

[0039] a parameter determining module for determining engineering parameters, the engineering parameters including coordinate information of the bridge, the main beam and the pile foundation, and size information, material information and construction stage information of all components;

[0040] The first modeling module is used to modify the values ​​of the target attributes of all components in the component family according to the engineering parameters, and to establish a BIM model;

[0041] The second modeling module is used to determine the information of the corresponding element in the finite element model based on the values ​​of the target attributes of all components in the BIM model, and to establish the finite element model.

[0042] In this invention, a component family is created for the BIM model. This component family defines the target attributes of all components in the BIM model and the connection relationships between different components. Target attributes include coordinate attributes, dimensional attributes, material attributes, and construction stage attributes. Engineering parameters are determined, including coordinate information for the bridge, main beam, and pile foundation, as well as dimensional, material, and construction stage information for all components. The values ​​of the target attributes of all components in the component family are modified according to the engineering parameters to establish the BIM model. Finally, the information of the corresponding elements in the finite element model is determined based on the values ​​of the target attributes of all components in the BIM model to establish the finite element model. Through this invention, after providing the engineering parameters for a railway bridge project, the BIM model and finite element model can be automatically and quickly established based on these parameters. When the bridge design changes, the relevant parameters can be modified to quickly modify the BIM model and finite element model, helping to save time and resources, promptly feeding the model back to the construction site, and reducing safety hazards. Attached Figure Description

[0043] Figure 1 This is a flowchart illustrating a parameter constraint modeling method for railway bridge engineering models according to an embodiment of the present invention.

[0044] Figure 2 for Figure 1 The flowchart of step S12 in the parameter constraint modeling method for railway bridge engineering is shown.

[0045] Figure 3 for Figure 1 The flowchart of step S13 in the parameter constraint modeling method for railway bridge engineering is shown.

[0046] Figure 4 for Figure 1 The flowchart of step S14 in the parameter constraint modeling method for railway bridge engineering is shown.

[0047] Figure 5 This is a schematic diagram of the hardware structure of a railway bridge engineering model parameter constraint modeling device in one embodiment of the present invention.

[0048] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0049] It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

[0050] In a first aspect, the embodiments of the present application provide a railway bridge engineering model parameter constraint modeling method.

[0051] Figure 1 A flowchart of the railway bridge engineering model parameter constraint modeling method in an embodiment of the present application is shown.

[0052] Referring to Figure 1 In an embodiment, the railway bridge engineering model parameter constraint modeling method includes the following steps:

[0053] S11, making a component family of a BIM model, the component family being used to define target attributes of all components in the BIM model and connection relationships between different components, the target attributes including coordinate attributes, size attributes, material attributes and construction stage attributes;

[0054] In this embodiment, the component family of the BIM model is made according to design drawings of the railway bridge engineering, including bridge upper components, bridge lower components, bridge deck systems and accessory settings. Specifically, the component family adopts an adaptive family type, and point families and line families are used to simulate components. The point family determines the position of a component by one point, and a component such as a pile cap can be placed by setting a coordinate value in the coordinate attribute of the point family. The line family determines the position of a component by two points, and a component such as a pile foundation can be placed by setting two coordinate values in the coordinate attribute of the line family, and the top and bottom coordinates of the pile need to be set when the component is placed. The size attribute can set information such as cross-sectional size, cross-sectional form and diameter according to the component type. The material attribute can set information such as material type and elastic modulus. The construction stage attribute includes an activation stage and a passivation stage, the activation stage defines the timing of placing the component into the model, and the passivation stage defines the timing of removing the component from the model, so that the BIM model can perform three-dimensional display of the bridge structure at each construction stage. When making the component family, it should be ensured that all components have the above target attributes completely, and the specific values of the target attributes can not be set or set as default values.

[0055] S12, determining engineering parameters, the engineering parameters including coordinate information of the bridge, the main girder and the pile foundation, and size information, material information and construction stage information of all components;

[0056] In this embodiment, the engineering parameters include coordinate information, size information, material information and construction stage information. It should be noted that, since the connection relationship between different components is defined in the component family, only the control point coordinates need to be determined when determining the engineering parameters, i.e., the coordinate information of the bridge, the main beam and the pile foundation, so that the coordinate information of all components can be determined in combination with the connection relationship. The size information, the material information and the construction stage information need to be determined one by one for all components according to the design drawings of the railway bridge project. The engineering parameters constrain the entire content of the BIM model, and the input of the engineering parameters should be complete.

[0057] Figure 2 The flowchart of step S12 in the railway bridge engineering model parameter constraint modeling method is shown. Figure 1

[0058] Referring to Figure 2 In an embodiment, step S12 specifically includes:

[0059] S121, obtaining the input engineering parameters through the graphical user interface;

[0060] S122, checking the input engineering parameters;

[0061] S123, if the checking fails, outputting an error prompt and returning to the step of obtaining the input engineering parameters through the graphical user interface.

[0062] In this embodiment, the operator inputs the engineering parameters, such as the coordinates of the bridge tower, the main beam and the pile foundation, the cross-sectional size of the bridge tower, the cross-sectional form and size of the main beam, the diameter of the pile foundation, the diameter of the cable and the main cable, the material type and the elastic modulus of the main beam and the tower, the activation stage and the passivation stage, etc., through the GUI (Graphics User Interface) according to the design drawings. The device checks the input engineering parameters, and if the checking fails, reminds the operator to input the correct engineering parameters through the image user interface again. After the checking passes, only the determined engineering parameters can be used in the subsequent steps.

[0063] ​Specifically, the parameter checking includes integrity checking, character type checking and logic checking. The integrity checking is used to check whether the input data is complete, for example, whether the span information of the bridge, the type of the main cable and the like are input. The character type checking is used to check whether the character type of the input data is correct, for example, whether the input span 240m is a western character. The logic checking is used to check whether the input data is reasonable and consistent with experience, for example, for a double-tower cable-stayed bridge and a suspension bridge, whether the input coordinates are reasonable through the distance and height difference between the two towers, and whether the input structural section size is in a reasonable range. For the data with errors, a warning is given and the error type is prompted. For the unreasonable part checked by the logic checking, a warning is given and the reasonable range is prompted, such as whether the unit system is filled according to the regulation.

[0064] S13, modifying the values of the target attributes of all components in the component family according to the engineering parameters, and establishing the BIM model;

[0065] In the embodiment, the engineering parameters determine the specific values of the target attributes of all components in the component family, so that all components in the component family are presented according to the requirements of the design drawing, and the establishment of the BIM model is completed.

[0066] Figure 3 A flowchart of step S13 in the railway bridge engineering model parameter constraint modeling method is shown. Figure 1 A flowchart of step S13 in the railway bridge engineering model parameter constraint modeling method is shown.

[0067] Referring to Figure 3 In an embodiment, step S13 specifically includes:

[0068] S131, calculating the coordinate information of all components in the component family according to the coordinate information of the bridge, the main beam and the pile foundation in the engineering parameters and the connection relationship between different components in the component family;

[0069] S132, modifying the values of the coordinate attributes of the components according to the calculated coordinate information of all components in the component family, so as to place the components in the BIM software;

[0070] S133, modifying the values of the size attributes, material attributes and construction stage attributes of the placed components according to the size information, material information and construction stage information of all components in the engineering parameters, and obtaining the BIM model.

[0071] In the embodiment, the coordinate information of all components in the component family is first calculated according to the control point coordinates and the connection relationship of the components, then the values of the coordinate attributes are modified according to the coordinate information, so as to place all components, and finally the values of the corresponding attributes of the placed components are modified according to the size information, material information and construction stage information, so as to ensure the orderliness of the BIM model establishment process.

[0072] S14, determine information of corresponding units in the finite element model according to values of target attributes of all components in the BIM model, and establish the finite element model.

[0073] In this embodiment, after the BIM model is established, the values of the target attributes of all components are determined, the information of the corresponding units in the finite element model is determined by extracting the structural information in the BIM model, and the finite element model can be established without re-inputting engineering parameters. In addition, the finite element model in this embodiment is established according to complete structural information, so that the establishment of the finite element model is not limited to a certain platform, such as generating ANSYS, Midas civil, ABAQUS, and the like.

[0074] Figure 4 The flowchart of step S14 in the railway bridge engineering model parameter constraint modeling method is shown. Figure 1 The flowchart of step S14 in the railway bridge engineering model parameter constraint modeling method is shown.

[0075] Referring to Figure 4 In an embodiment, step S14 specifically includes:

[0076] S141, traverse the BIM model to obtain values of target attributes of all components in the BIM model;

[0077] S142, determine node composition information and node coordinate information of corresponding units in the finite element model according to values of coordinate attributes of all components in the BIM model;

[0078] S143, determine size information and material information of corresponding units in the finite element model according to values of size attributes and material attributes of all components in the BIM model;

[0079] S144, establish the finite element model according to node composition information, node coordinate information, size information, and material information of all units in the finite element model.

[0080] In this embodiment, since the positions of all components in the BIM model are determined, each point on the component also has a determined coordinate, so that the node composition information and the coordinate information of each node in the unit can be obtained according to the grid division requirements of the finite element model. The size information and the material information of the component and the corresponding unit are consistent. After the node composition information, the node coordinate information, the size information, and the material information of all units in the finite element model are determined, the finite element model is established according to the complete structural information.

[0081] Optionally, after obtaining the values of the target attributes of all components in the BIM model, corresponding node tables, unit tables, size tables, and material tables are generated, so as to facilitate the integration of information.

[0082] Thus, by the embodiment, after the engineering parameters of the railway bridge engineering are provided, the establishment of the BIM model and the finite element model can be automatically and quickly completed based on the parameters. When the bridge scheme changes, the BIM model and the finite element model can also be quickly modified by modifying the related parameters, which helps to save time and resources, timely feedback the model to the construction site, and reduce safety hazards.

[0083] Further, in an embodiment, after step S14, the method further comprises:

[0084] mapping the components in the BIM model and the units in the finite element model to make the modification of the BIM model feedback to the finite element model.

[0085] In the embodiment, since the finite element model is established according to the structural information extracted from the BIM model, the finite element model and the BIM model are consistent, and it is easy to establish the mapping relationship. After the mapping relationship is established, when the operator modifies the BIM model according to the actual construction situation on site, the modification in the BIM will be fed back to the finite element model, and the finite element model will automatically adjust to the modified components. The modification belongs to incremental modification, and the modification speed of the finite element model is faster, which further saves time and resources, ensures that the finite element model is timely fed back to the construction site, and reduces safety hazards.

[0086] Further, the step of mapping the components in the BIM model and the units in the finite element model comprises:

[0087] determining a target unit in the units of the finite element model, and determining a target component corresponding to the target unit in the BIM model;

[0088] establishing a one-to-one mapping relationship between the components other than the target component in the BIM model and the corresponding units other than the target unit in the finite element model;

[0089] segmenting the to-be-segmented unit into a plurality of sub-units;

[0090] establishing a one-to-many mapping relationship between the target component in the BIM model and the plurality of sub-units in the finite element model.

[0091] In this embodiment, by default, the components in the BIM model and the units in the finite element model are in a one-to-one mapping relationship. In particular, according to actual conditions, some units need to be subdivided in the finite element model, for example, for a unit with a large length, it needs to be subdivided to add constraints. For the target unit that needs to be subdivided, the corresponding target component needs to reestablish a one-to-many mapping relationship with the subdivided sub-units to ensure information exchange between the two models. Specifically, the unit attribute of the finite element model needs to add an attribute of the component it belongs to, and the component number of the subdivided sub-units remains unchanged, and the cross section of the sub-unit is calculated by interpolation according to the cross section of the corresponding component.

[0092] Further, in an embodiment, after step S14, it further includes:

[0093] Adding constraint conditions and boundary conditions in the finite element model.

[0094] In this embodiment, for the finite element model established according to the structural information in the BIM model, constraint conditions and boundary conditions also need to be added to perform stress analysis to obtain internal force information such as axial force, bending moment, stress, and strain of the cross section.

[0095] Specifically, the steps of adding constraint conditions and boundary conditions in the finite element model include:

[0096] Adding co-node constraints between different segments of the main beam, adding rigid connection constraints between the cable and the main beam, and between the cable and the bridge tower, and adding elastic constraints between the main beam and the bridge tower according to the structural system;

[0097] Adding soil spring constraints to the pile foundation according to the soil layer information, and adding elastic constraints to the two ends of the main beam according to the support information.

[0098] In this embodiment, the stiffness of the elastic constraint in the constraint condition is determined according to the tower-beam combination type, such as a floating system that only constrains the vertical stiffness and lateral stiffness at the combination. The stiffness of the elastic constraint in the boundary condition is calculated according to the support type parameter.

[0099] Further, in an embodiment, after step S14, it further includes:

[0100] Adding load information in the finite element model.

[0101] In this embodiment, load information is added in the finite element model according to actual conditions to analyze the influence of external forces on the stress of the bridge structure. Optionally, point groups are used to simulate loads, and the point groups need to set coordinate attributes and construction stage attributes when simulating loads.

[0102] In a second aspect, the embodiments of the present application also provide a railway bridge engineering model parameter constraint modeling device.

[0103] Figure 5 A hardware structure schematic diagram of a railway bridge engineering model parameter constraint modeling device in an embodiment of the present application is shown.

[0104] Referring to Figure 5 In an embodiment, the railway bridge engineering model parameter constraint modeling device comprises:

[0105] A component family making module 10 is configured to make a component family of the BIM model, the component family being configured to define target attributes of all components in the BIM model and connection relationships between different components, the target attributes including coordinate attributes, size attributes, material attributes and construction stage attributes;

[0106] A parameter determining module 20 is configured to determine engineering parameters, the engineering parameters including coordinate information of the bridge, the main beam and the pile foundation, and size information, material information and construction stage information of all components;

[0107] A first modeling module 30 is configured to modify values of the target attributes of all components in the component family according to the engineering parameters, and to establish the BIM model;

[0108] A second modeling module 40 is configured to determine information of corresponding units in the finite element model according to the values of the target attributes of all components in the BIM model, and to establish the finite element model.

[0109] Further, in an embodiment, the parameter determining module 20 is configured to:

[0110] obtain the input engineering parameters through a graphical user interface;

[0111] check the input engineering parameters;

[0112] if the check fails, output an error prompt and return to the step of obtaining the input engineering parameters through the graphical user interface.

[0113] Further, in an embodiment, the first modeling module 30 is configured to:

[0114] calculate coordinate information of all components in the component family according to the coordinate information of the bridge, the main beam and the pile foundation in the engineering parameters and the connection relationships between different components in the component family;

[0115] modify values of coordinate attributes of the components according to the calculated coordinate information of all components in the component family, so as to place the components in the BIM software;

[0116] modify values of size attributes, material attributes and construction stage attributes of the placed components according to the size information, the material information and the construction stage information of all components in the engineering parameters, to obtain the BIM model.

[0117] Further, in an embodiment, the second modeling module 40 is configured to:

[0118] traverse the BIM model to obtain values of the target attributes of all components in the BIM model;

[0119] determine node composition information and node coordinate information of corresponding units in the finite element model according to the values of the coordinate attributes of all components in the BIM model;

[0120] determine size information and material information of corresponding units in the finite element model according to the values of the size attributes and the material attributes of all components in the BIM model;

[0121] establish the finite element model according to the node composition information, the node coordinate information, the size information and the material information of all units in the finite element model.

[0122] Further, in an embodiment, the railway bridge engineering model parameter constraint modeling device further comprises a mapping module 50 configured to:

[0123] establish a mapping relationship between the components in the BIM model and the units in the finite element model, so that modifications to the BIM model are fed back to the finite element model.

[0124] Further, in an embodiment, the mapping module 50 is configured to:

[0125] determine a target unit in the finite element model and a target component corresponding to the target unit in the BIM model;

[0126] establish a one-to-one mapping relationship between other components in the BIM model except the target component and other corresponding units in the finite element model except the target unit;

[0127] divide the to-be-divided unit into a plurality of sub-units;

[0128] establish a one-to-many mapping relationship between the target component in the BIM model and the plurality of sub-units in the finite element model.

[0129] Further, in an embodiment, the second modeling module 40 is further configured to:

[0130] add constraint conditions and boundary conditions in the finite element model.

[0131] Further, in an embodiment, the second modeling module 40 is further configured to:

[0132] add a common node constraint between different segments of the main girder, add a rigid connection constraint between the cable and the main girder, between the cable and the tower, and add an elastic constraint between the main girder and the tower according to the structural system;

[0133] According to the soil information, the soil spring constraint is added to the pile foundation, and according to the support information, the elastic constraint is added to the two ends of the main beam.

[0134] Further, in an embodiment, the second modeling module 40 is further configured to:

[0135] Load information is added in the finite element model.

[0136] The functions of each module in the railway bridge engineering model parameter constraint modeling device correspond to the steps in the railway bridge engineering model parameter constraint modeling method, and the functions and implementation processes will not be repeated here.

[0137] It should be noted that in this document, the terms "comprise", "comprise", or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or inherent to such a process, method, article or system. Without more limitations, the element defined by the statement "comprises a" does not exclude the existence of other identical elements in the process, method, article or system that includes the element.

[0138] The above-mentioned serial numbers of the embodiments of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0139] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.

Claims

1. A railway bridge engineering model parameter constraint modeling method, characterized in that, The railway bridge engineering model parameter constraint modeling method comprises: a component family for making a BIM model is made, the component family is used to define target attributes of all components in the BIM model and connection relationships between different components, the target attributes include coordinate attributes, size attributes, material attributes and construction stage attributes; engineering parameters are determined, the engineering parameters include coordinate information of a bridge, a main beam and a pile foundation, and size information, material information and construction stage information of all components; values of the target attributes of all components in the component family are modified according to the engineering parameters, and a BIM model is established; information of corresponding units in a finite element model is determined according to the values of the target attributes of all components in the BIM model, and the finite element model is established; a mapping relationship between components in the BIM model and units in the finite element model is established, so that modifications to the BIM model are fed back to the finite element model; the step of modifying the values of the target attributes of all components in the component family according to the engineering parameters and establishing the BIM model comprises: coordinate information of all components in the component family is calculated according to the coordinate information of the bridge, the main beam and the pile foundation in the engineering parameters and the connection relationships between different components in the component family; values of coordinate attributes of components are modified according to the calculated coordinate information of all components in the component family, so that the components are placed in a BIM software; values of size attributes, material attributes and construction stage attributes of the placed components are modified according to the size information, material information and construction stage information of all components in the engineering parameters, and the BIM model is obtained; the step of determining information of corresponding units in the finite element model according to the values of the target attributes of all components in the BIM model and establishing the finite element model comprises: values of the target attributes of all components in the BIM model are obtained by traversing the BIM model; node composition information and node coordinate information of corresponding units in the finite element model are determined according to values of coordinate attributes of all components in the BIM model; size information and material information of corresponding units in the finite element model are determined according to values of size attributes and material attributes of all components in the BIM model; the finite element model is established according to node composition information, node coordinate information, size information and material information of all units in the finite element model; the step of establishing a mapping relationship between components in the BIM model and units in the finite element model comprises: a target unit is determined in the units of the finite element model, and a target component corresponding to the target unit is determined in the BIM model; a one-to-one mapping relationship is established between other components in the BIM model except the target component and other corresponding units in the finite element model except the target unit; a to-be-split unit is split into a plurality of sub-units; a one-to-many mapping relationship is established between the target component in the BIM model and the plurality of sub-units in the finite element model.

2. The railway bridge engineering model parameter constraint modeling method of claim 1, wherein, the step of determining the engineering parameters comprises: inputted engineering parameters are obtained through a graphical user interface; the inputted engineering parameters are checked; if the check fails, an error prompt is outputted, and the step of obtaining inputted engineering parameters through a graphical user interface is executed again.

3. The railway bridge engineering model parameter constraint modeling method according to claim 1 or 2, characterized in that, The step of establishing the finite element model according to the values of the target attributes of all components in the BIM model to determine information of corresponding units in the finite element model further comprises: adding constraint conditions and boundary conditions in the finite element model.

4. The railway bridge engineering model parameter constraint modeling method of claim 3, wherein, The step of adding constraint conditions and boundary conditions in the finite element model comprises: adding a common node constraint between different segments of the main beam, adding a rigid connection constraint between the cable and the main beam, between the cable and the tower, and adding an elastic constraint between the main beam and the tower according to the structural system; adding a soil spring constraint to the pile foundation according to the soil layer information, and adding an elastic constraint to the two ends of the main beam according to the support information.

5. The railway bridge engineering model parameter constraint modeling method according to claim 1 or 2, characterized in that, The step of establishing the finite element model according to the values of the target attributes of all components in the BIM model to determine information of corresponding units in the finite element model further comprises: adding load information in the finite element model.

6. A railway bridge engineering model parameter constraint modeling device, characterized in that, The railway bridge engineering model parameter constraint modeling device comprises: a component family making module configured to make a component family of a BIM model, the component family being configured to define target attributes of all components in the BIM model and connection relationships between different components, the target attributes including coordinate attributes, size attributes, material attributes, and construction stage attributes; a parameter determining module configured to determine engineering parameters, the engineering parameters including coordinate information of a bridge, a main beam, and a pile foundation, and size information, material information, and construction stage information of all components; a first modeling module configured to modify values of the target attributes of all components in the component family according to the engineering parameters to establish the BIM model; a second modeling module configured to determine information of corresponding units in a finite element model according to the values of the target attributes of all components in the BIM model to establish the finite element model; a mapping module configured to establish a mapping relationship between components in the BIM model and units in the finite element model, so that modifications to the BIM model are fed back to the finite element model; The first modeling module is configured to: calculate coordinate information of all components in the component family according to the coordinate information of the bridge, the main beam, and the pile foundation in the engineering parameters and the connection relationships between different components in the component family; modify values of coordinate attributes of the components according to the calculated coordinate information of all components in the component family to place the components in a BIM software; modify values of size attributes, material attributes, and construction stage attributes of the placed components according to the size information, the material information, and the construction stage information of all components in the engineering parameters to obtain the BIM model; The second modeling module is configured to: traverse the BIM model to obtain values of target attributes of all components in the BIM model; determine node composition information and node coordinate information of corresponding units in the finite element model according to values of coordinate attributes of all components in the BIM model; determine size information and material information of corresponding units in the finite element model according to values of size attributes and material attributes of all components in the BIM model; establish the finite element model according to node composition information, node coordinate information, size information, and material information of all units in the finite element model; The mapping module is configured to: determine a target unit in the units of the finite element model and determine a target component corresponding to the target unit in the BIM model; The other components in the BIM model except the target component are mapped one-to-one with the other corresponding units in the finite element model except the target unit; The to-be-split unit is split into a plurality of sub-units; The target component in the BIM model is mapped one-to-many with the plurality of sub-units in the finite element model.

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