Application Of BIM Technology In Finite Element Analysis Of Cable-stayed Bridges

With the maturity of bridge structural mechanics analysis theory and the application of a series of high-strength and light materials,the number of new cable-stayed bridges is increasing,and the span of cable-stayed bridges is also developing from large span to super span.In order to ensure the bearing capacity and alignment of cable-stayed bridge in the construction process and after completion of the bridge meet the requirements,it is necessary to carry out reliable and accurate finite element analysis.At present,the finite element analysis of cable-stayed bridges is usually carried out by directly establishing the finite element model in the finite element software.But there are many shortcomings in this way.Firstly,the modeling process is very complicated.Secondly,the operation of finite element software is difficult.In particular,ANSYS is an all-English interface,which is extremely unfriendly.Many engineers and technicians are incapable of using these finite element software.However,the rising BIM technology in recent years can make use of the characteristics of its parametric modeling to achieve rapid batch modeling,which is easy to operate and fast,and the BIM model created is beautiful.However,BIM model is mainly used for simulation of construction process,collision inspection,construction drawing and calculation of quantities.It can not be directly used in the finite element analysis of structures,and there are few relevant researches at present.Therefore,this paper explores the application of BIM technology to finite element analysis of cable-stayed bridges to solve the drawbacks of cumbersome modeling in traditional methods.Taking Jialing River Bridge in Hechuan of Chongqing as the engineering background,this paper explores the application of BIM technology in the finite element analysis of cable-stayed bridges.The research contents are as follows:(1)Using the Revit software of BIM system and the parametric modeling method,taking Jialingjiang super large bridge as an example,a family library of cable-stayed bridge tower,abutment,main beam and cable is created,and a complete BIM model of cable-stayed bridge is established.At the same time,the three-dimensional real terrain model of the bridge is established by using the current popular GIS technology,and the three-dimensional real terrain model is imported into the BIM model..(2)In order to realize the functions of importing BIM model into ANSYS automatically and completing grid division automatically,a BIM model data conversion interface program can be developed with C ? language.At the same time,in order to simplify the operation process and prompt the work efficiency,the data conversion interface program should also have the function of automatically applying load and viewing the calculation results.(3)Using Revit secondary development technology,BIM model data conversion interface program is added to Revit as an external plug-in.This can improve work efficiency and reduce the probability of error.