CN111274632A - Construction method of BIM (building information modeling) parameterized modeling platform for highway engineering - Google Patents

Abstract

The invention discloses a construction method of a BIM (building information modeling) parameterized modeling platform of highway engineering, which is a method for quickly creating, calculating, analyzing and applying a BIM model and comprises the following steps: 1) based on the whole design cycle of the highway engineering, establishing a visual programming engineering data structure system, embedding a BIM standard of the highway engineering, and realizing flexible definition of the aggregation and derivation instantiation logical relationship among engineering entity components; 2) complex and heterogeneous modeling capabilities are realized through an open source geometric modeling class library, and engineering database management is carried out by taking a model decomposition structure as a hub, so that collaborative design, storage and management of modeling bodies and construction information are realized; 3) the method is based on a plug-in, a mainstream design platform and a geographic information system to carry out three-dimensional display and information transfer, and is applied to the stages of highway engineering design, construction, maintenance and operation.

Description

Construction method of BIM parametric modeling platform for highway engineering

technical field

The invention relates to BIM technology, geometric modeling technology and graphic rendering technology, in particular to a technical method for rapid modeling of BIM models and association with engineering structures.

Background technique

BIM technology is an engineering information application technology based on the development and integration of modern information technology and computer technology. Full life cycle information sharing and work collaboration can effectively recommend the informatization construction of engineering construction projects.

Although the foreign mainstream BIM software has strong modeling capabilities, it still has a running-in period to integrate with China's engineering practice, and will encounter obstacles from norms, standards, and management models. At this stage, there is no software that can quickly create a full-professional, high-precision BIM model of highway engineering, and automatically associate it with the engineering structure to meet the application in different stages of the highway engineering cycle.

For newly-built, renovated, under-constructed and built expressways, design units, management units and consulting units gradually accumulate some BIM model components during the implementation of the project, most of which are reusable component resources, but due to the specialization of highway engineering The level is relatively high, and the standards, BIM software and model depth are different. The BIM model component library established only to meet the current project needs is difficult to achieve effective use of component resources. BIM information assets to support different application scenarios in the design, construction, and management stages of the industry.

Take CAD (Computer Aided Design, Computer Aided Design)/CAE (Computer Aided Engineering, Computer Aided Engineering)/CAM (Computer Aided Manufacturing, Computer Aided Manufacturing) OpenCasCade (geometric model core) open source geometric modeling basic platform as a geometric modeling class library, The development freedom is higher, which can better support the open source advantages of complex parametric model modeling of highway engineering. It has a large-scale mature service community and a lot of development experience for reference. At the same time, the open source software based on OpenCasCade makes the development cost lower. , the research and development depth can dive deeper.

SUMMARY OF THE INVENTION

The invention provides a method for constructing a BIM parametric modeling platform for highway engineering, which effectively solves the problem that BIM modeling software cannot meet the requirements of rapid creation of high-precision BIM models for highway engineering, association of BIM models with engineering structure systems, and BIM parametric components. The problem of non-uniform standards enables the creation of engineering structures based on industry BIM standards, and generates a model decomposition structure; parametric BIM models are automatically associated and control parametric modeling behavior, realizing arbitrarily complex modeling body modeling, which can be applied to all aspects of highway engineering. different stages of the cycle. The technical scheme adopted in the present invention includes:

Organize and import the industry "BIM Model Classification Standard", "BIM Model Coding Standard" and engineering instantiation data into the BIM parametric modeling platform, generate a basic library of model decomposition structure, and realize the management of engineering logic and engineering through component code (ID) association. Information and process information, and at the same time specify the logical relationship of instantiated aggregation, inheritance and derivation between engineering entity class components through visual programming, realize the definition and analysis of bridge span expressions, and generate instantiated engineering structures;

Create a BIM parametric component template library through a visual constraint solver, assign and associate constraint labels to all constraint variables, and manage the component library in the form of additional component codes;

Create engineering structure based on visual programming, control the constraint labels defined by the generated BIM parameterized component template library, and deepen the BIM parameterized component template library into an engineering BIM parameterized component template library driven by the instantiated engineering structure;

Driven by line and terrain instance data, generate parametric BIM model and its component information, define and store data in model file (OBJ) format through model body, and perform data in Extensible Markup Language (XML) format through model information storage;

Create BIM parametric modeling platform plug-ins based on mainstream modeling software such as AutoDesk Civil3D, Bentley Powercivil and Dassault Catia, and combine modeling API of BIM design platform to directly model and render in mainstream modeling platforms;

Export model formats such as FBX (3D file format), OBJ (model file), etc., support mainstream 3D display platforms such as SkyLine, Cesium, ArcGis, CityMaker, and combine GIS terrain to display 3D design results. The generated BIM component information can be used in highway engineering. Implement applications at different stages of the full cycle.

Description of drawings

Figure 1 shows the construction steps of the BIM parametric modeling platform for highway engineering.

Figure 2 is a specific implementation of the BIM parametric modeling platform for highway engineering.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to FIG. 2 . The embodiments described are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, the field of All other embodiments obtained by ordinary technicians without innovative work fall within the protection scope of the present invention.

Referring to accompanying drawing 2, the present invention adopts the following embodiments based on the visual design interface:

Organize and import the industry "BIM Model Classification Standard", "BIM Model Coding Standard" and engineering instance parameters such as bridge span expressions, piers, beam-slab structure styles and dimensions, and import them into the BIM parametric modeling platform to generate belt components Coded instance engineering structure, specifically involving hierarchical division relationship, component physical information and component construction information;

Create BIM parametric modeling platform plug-ins through mainstream BIM modeling software, and combine with BIM design platform modeling API to directly model and render parametric BIM models in mainstream modeling platforms;

Through the mainstream model format and GIS platform, the display of 3D design results is realized. Through the generated BIM component information, the model decomposition structure is combined with the work decomposition structure and engineering system decomposition structure widely used in highway engineering, so as to realize different stages of the whole cycle of highway engineering. application.

The geometric modeling is shown in Figure 2, including two-dimensional modeling and three-dimensional modeling, as follows:

By combining the visual 2D constraint solver with modeling operations such as stretching and sweeping, a BIM parametric component template library is created, and the constraint variables are controlled through parameter labels, and the component code ID is attached to realize the management of the component library;

Based on the visual 3D assembly constraint solver, the generated parametric components are assembled, and the parametric BIM model instance is generated through the instance data drive of the line and terrain and the model file (OBJ) format, and the BIM model component space information is generated through the BIM model calculation. And the bill of quantities information, and then combined with the generated component information to store and transfer the extensible markup language (XML) format uniformly.

Aiming at the problems of complex and diverse components of highway engineering and low modeling efficiency, the present invention proposes a method for constructing a BIM parametric model platform for highway engineering, which can realize the rapid creation, calculation analysis and application of highway engineering component models, and can be widely used in engineering Industry design, construction, operation and maintenance stages.

Claims (4)

1. A construction method of a BIM (building information modeling) parameterized modeling platform for highway engineering is characterized by comprising the following steps of:

1) based on the whole design cycle of the highway engineering, establishing a visual programming engineering data structure system, embedding a BIM standard of the highway engineering, and realizing flexible definition of the aggregation and derivation instantiation logical relationship among engineering entity components;

2) complex and heterogeneous modeling capabilities are realized through an open source geometric modeling class library, and engineering database management is carried out by taking a model decomposition structure as a hub, so that collaborative design, storage and management of modeling bodies and information attribute construction are realized;

3) the method is based on a plug-in, a mainstream design platform and a geographic information system to carry out three-dimensional display and information transfer, and is applied to the stages of highway engineering design, construction, maintenance and operation.

2. The method of claim 1, wherein step 1) comprises:

based on an embedded highway engineering BIM standard, a model decomposition structure is created and generated, and hierarchical division and association of geometric information and process information are realized;

a project data structure system is established through visual programming and used for appointing logic relations of instantiation aggregation, inheritance and derivation among project entity components, and the division, the splitting and the combination of model bodies and the definition and the analysis of a bridge span expression are realized.

3. The method of claim 1, wherein step 2) comprises:

the OpenCasCade open source geometric modeling basic platform is used as a geometric modeling class library to realize basic modeling, calculation, analysis, space transformation and Boolean;

the method comprises the steps of establishing a two-dimensional constraint solver and a three-dimensional constraint solver which meet the modeling requirements of highway engineering, realizing the creation of a complex parameterized template, and generating a parameterized component unit model;

based on a three-dimensional constraint solver, realizing parameterized space three-dimensional assembly of the component unit model;

describing complex curved surface objects by storing points, lines, surfaces and mutual relations of the points, the lines and the surfaces, and realizing triangulation of a curved surface model by utilizing a B-REP boundary method for calculating geometrical characteristics to make strong support for data exchange of the mesh objects;

and controlling the modeling of all parameterized components by using an engineering data structure system to generate a BIM parameterized component library.

4. The method of claim 1, wherein step 3) comprises:

manufacturing BIM parameterized platform plug-in by using mainstream BIM modeling software of Autodesk Civil3D, Bentley Powercivil and Dassault Catia, and directly modeling and rendering a parameterized BIM in an ABD mainstream modeling platform by combining BIM design platform modeling API;

the platform supports derivation of main flow model formats such as FBX and OBJ, supports main flow three-dimensional display platforms such as SkyLine, Cesium, ArcGis and CityMaker, and can be combined with GIS terrain to realize three-dimensional design result display.

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