Research On BIM-based Bridge Operation Management Of Super Large Bridge

With the high-quality development of transportation in China,the number of infrastructure is increasing.While the traffic is becoming more convenient,the traffic flow in many regions is growing at a high level,which results in more social concerns about infrastructure safety.As an important part of infrastructure in China,the safety of highway bridges cannot be ignored.In particular,the super large bridges generally play more important role in transportation functions and social benefits compared with ordinary bridges,which deserve more attention in safety and other aspects.At the same time,the management phase of one bridge is the main and longest period in its whole life cycle.As for bridge management,it not only needs to carry all the information of the planning,design and construction phase,but also needs to dynamically integrate the data of daily management.In the context of the urgent need to improve the management level of super large bridges in China and the accelerated development of digital informatization in various fields,the management problems of super large bridges are highlighted,which is a very hard work.As an emerging technology,the application value of BIM in the infrastructure field is gradually recognized in all aspects.Based on BIM technology,this paper studies the construction of BIM model,standardization of BIM data,coding system and knowledge base for the management of super large bridges.Taking Jintang Bridge as an example,the product prototype of management system is carried out,including the following contents:(1)Using the research method of information management,in order to meet the needs of the management of super large bridges,this paper makes a detailed analysis of the current situation of the application of BIM technology,and combining with the actual cases of the management of bridges at home and abroad,it points out that the system of maintenance technology is not complete enough,the digital fundation needs to be strengthened,a unified data standard is lacking,the management work relies too much on subjective experience,and the bridge service performance needs to be improved comprehensively.(2)This paper expounds the general classification and composition structure of bridges,as well as the composition of management information.In order to solve the problemof lacking data standard in the industry,it discusses the theories from three aspects,including the standardization of BIM models,information coding and LOD,which respectively correspond to IFC standard,the latest coding standards of highway information model,and LOD specifications.The commercial software related to BIM modeling of bridge was investigated to provide a theoretical basis for the standardization of management model.(3)Because the current BIM data standard of bridge is still imperfect,some main components,defects and reinforcement information are expanded,and a LOD modeling scheme for super large bridges is developed.Based on CATIA,the top-down modeling method is adopted to build the mangement BIM model of Jintang Bridge,including the main structure model and defect model,which verifies the rationality of the above ideas.At the same time,the concept of knowledge base is introduced,and typical examples of management knowledge are summarized from three aspects,including bridge detection base,defect information base and defect deterioration and prevention base,which reduces the excessive dependence on subjective experience.(4)Based on the above achievements,the demand analysis was carried out for Jintang Bridge.First,the function of the system homepage was designed with the goal of 3D model browsing and structure tree interaction.According to the difference of data types,the offline and online data collection and data management methods were designed.It provides a comprehensive and intuitive visualization of defect information,and integrates the management knowledge base.Focusing on the overload problem,a dynamic twin simulation scheme is designed by combining with high-definition video monitor and dynamic weighing system to achieve multi-dimensional statistics of vehicle information.Based on the semantic model,the idea of automatic evaluation of technical status is proposed,which provides a reference for the application of BIM technology in the management phase of super large bridges,and provides a theoretical and practical reference for the digitalization of bridge management.Finally,based on the process of BIM management,this paper proposes the countermeasure for bridge management,which takes active management as the core,and lays the foundation for active bridge management.