Stress Analysis And Test Of Tubular Style Bridge Expansion And Contraction Installation

With the development of economy, people begin to pay attention to its comfort, beautility and durability more than its functionality for bridge. The bridge expansion and contraction installation is one of the important accessory structures of the bridge. Its performance will influence the comfort and cost of the bridge. Meanwhile, the installation is installed in the weak position of beam end, exposed to the natural environment for a long time and it bears the repeated impact from the wheel loads directly. For these reasons, it is the structure, which is the easiest to be destroyed and most difficult to repair in bridge. So, the research of the bridge expansion and contraction installation problem has been a hot question all the time.In this paper, the status quo of the installation is analyzed. The existing installations are classified. The application range, relative merits of different styles of installations are summed up, and the problems easy to arise and their causes are analyzed. Aimed at solving these problems, a new style installation - tubular style bridge expansion and contraction installation has been introduced in the paper. Its structure and characteristics have Jbeen first analyzed. Its three-dimensional model is built and its motion is simulated. Based on the motion analysis, the paper presents the stress analysis of this installation with finite element analysis program ANSYS. The mechanical test of the installation is also presented. The results of motion analysis, stress analysis and test show that the installation is rationally designed and has a good bearing capacity.