Structure Analysis And Fatigue Performance Research On The Bridge Bearing

The bridge bearing is part of the structure of the bridge, which links upper and lower structure and helps to deliver reaction and distortion from the upper structures to lower reliably. Along with the development of bridge construction, the large span bridge constantly emerging, the requirements of the capacity, displacement and angle of the bridge bearing improves, so need to research and develop new kinds of bridge bearings to adapt it. Spherical bearing with big bearing capacity, flexible rotation, no rubber aging problem, long life and other characteristics, can adapt to curve, wide and ramp bridges. This thesis mainly aimed at spherical bearing and researched problems in following aspects:1. The method of contact analysis which has been performed with the finite element analysis software ANSYS is used to simulate the bearing under the vertical load and compressive turn load. The main design parameter of the spherical bearing has been studied, such as area of PTFE sheet, coefficient of friction between concrete pier and cast steel structure, concrete stiffness etc, and fund out the change rules, provided reference for the design and manufacturing of spherical bearing.2. With spherical bearing for object, developed a bridge bearings parameter FE analysis system using Visual Basic programming language and ANSYS APDL language, which used to spherical bearing parameterized simulation analysis. The system interface friendly, easy to analyze structure of the different types of bridge bearing, shorten development cycle.3. Studied fatigue performance of spherical bearing with the fatigue analysis software FEMFAT. Considering many types of fatigue effect factors, to calculate and analyze safety coefficient and fatigue life of spherical bearing structure under alternating load.The research contents and results of this thesis have great practical values for the spherical bearing’s design and its series production, at the same time, it provides a valid reference for same or other types of bearing’s study.