| With the continuous improvement of the level of urbanization, the problem of urban road jam have been increasingly serious. And the rise of urban overpass bridge effectively solves the urban road jam problem. The variable width, curved girder and other irregular structures are used as its parts of the irregular concrete beam bridge of urban interchange, which is usually designed according to the road line type. Currently in the market of various bridge structure analysis software, weakness in the pretreatment are found out. On the basis of the existed practical structure analysis software and bridge structure analysis software, the problem of complex modeling and time-consuming may come up in the process of the analysis of the city overpass irregular bridge. And it is difficult to meet the needs of practical engineering.Parametric modeling is an important method of improving the efficiency of structural analysis, and at present commonly used bridge structure finite element analysis software does not provide efficient parametric design interface, and data file editing and reading all face certain difficulties, when it is unable to make parametric modeling come true. Bridge structure type is not variable at all, so many city overpass irregular bridge structure type is similar. And only the specific parameters are different. If the main data of structure is formed into parameterized data and the generation of structure model can be controlled by the parameter, it can largely improve the efficiency of structural analysis.Based on the parameterized modeling method and the diversity of structure kind supported by Midas/Civil, parameterized modeling is done for the irregular concrete beam bridge of urban interchange. Based on the program developing platform VC 6.0 and by using C/C++ programming language helper applications, bridge parameters are written into programs. And then it is imported into the Midas/Civil for calculation. By this way, the working time is reduced effectively and the design efficiency is greatly improved. |
