The Design And Static Analysis On Bridge-Building Composite Structure System

With the rapid development of modern economy and the continuous improvement of people’s living conditions, the urbanization is further accelerated. For the limitation of land resources, and in order to meet requirements of the urban construction and the tourism development, the combination system of bridge structure and building structure appeared in time. Until now, there is little research works on this kind of composite structure system, so it is necessary to study the force distribution and design methods to this kind of structure. The main contents are as follows: Firstly, based on project of the gallery bridge of Nuojiang commercial plaza in TongJiang County, the whole bridge was discretized into many finite elements by the finite element software of Midas/Civil. And then, based on the theory of grillage method, the influence of the building on arch and the three dimensional effect for structure were taken into account, finally, the integral calculation model of the composite structure system which including the building and the arch was established. Based on calculation model of the finite element, this paper researched on the force condition of the structure under several floor live loading. Moreover, the bearing capacity calculation of the structure was checked and the calculation results were conformed to the requirements of specification.Secondly, compared the integral calculation model of the composite structure system with the calculation model of the upper building in the form of load upon the bridge, the results showed that they had well consistency, which means the trend of changes in the internal force and displacement of section were similar. And then the influence of the spatial effect on structure in the aspects of internal force and displacement was relatively obvious.At last, in the aspects of elastic stability and temperature effect of structure, the paper studied the interaction between building and bridge in the kind of composite structure system, providing the reference for design of the same kind of composite structure system. It has a certain reference value for the future development of the combination system of bridge structure and building structure.