Research On Design And Information Management Of Steel Trussed Arch Bridge Based On Bim Technology

The BIM application has been gradually expanded from the building field to the municipal works, road engineering, water conservancy project, ect. However, the BIM application and research in bridge engineering is still rare. Since the complex design of steel trussed arch bridge, the difficult in construction, the more heterogeneous components and the huge and distributed information, the efficient design and effective information management is typical in the bridge engineering. The design and information management of steel truss arch bridge based on BIM technology was studied in this paper. Taking the Jingjiang bridge in Tianfu New District as the background project,3D structure design method was adopted to replace the traditional design method in the design process. Then performance information was obtained by finite element analysis. The structure and performance information was classified and managed at last.The comparison of international construction information classification system ISO 12006-2, Uniclass, OmniClass and CBIMS (China Building Information Modeling Standard) classification system indicated that these systems attempted to cover all information in building life cycle. And the specific classification table of these system was mutual referenced and integrated under the framework of ISO 12006. An information model space of bridge engineering integrated of three dimensions including structure Entities, structural performance and lifecycle was put forward based on the construction achievement, construction resources and process of construction of the Chinese construction information classification system in order to realize BIM design and information management. Information of solid structure was further decomposed into system information and component information to realize the standard organization of structural information and serve the 3D design of the structure. Difference between 3D design based on BIM and traditional 2D design was analyzed and the necessity of 3D design was expounded. High-quality parametric design and efficient collaborative design of steel trussed arch bridges became realized through the measure such as the definition of structure entity model level and depth, the division of parameter control line level and the standardized creation and maintenance of component family.For the structure performance-oriented information management of steel trussed arch bridge, typical original performance information such as deflection, internal force and stress were obtained by finite element analysis at first. Then, the original performance information was decomposed by forms of text, graphics, original data, ect according to the CBIMS classification and coding system. However, it was difficult to integrate this information directly into the information model space, so the method of representing the performance information by the index of nominal security degree and security degree was suggested and adopted in the background engineering. Taking the key structure arch hinge as an example, the method of 3D structure design based on BIM was adopted for technical design. Then the performance differential information was obtained by Hertz theory and finite elements analysis. The index of nominal security degree, etc was adopted to represent the differential hinge performance information. The practical application of arch hinge indicated that BIM information organization was required to face structure entity and structure performance at the same time.For the steel trussed arch bridge life cycle information management, the flow of information from the planning and design process, the construction process to the operation and maintenance process was researched. Then a theoretical model of bridge project life cycle with the structure and performance as the core was put forward. The structure damage and resistance degradation of suspender was simulated as an example. The simulation indicated that the theoretical model built in this paper was feasible and the method of representing the performance information by the index of nominal security degree, etc could realize the life cycle information management of steel trussed arch bridge.