Research On Properties Of Laminated Rubber Bearing And Series Seismic Isolation System After High Temperature

In order to effectively use the isolating layer at the top of the floor, an increasing number of base-isolated building and maintenance will be installed directly into the basement layer or semi-basement, holding the laminated rubber bearing placed in the capitals or the top of the wall to form a base-isolated layer in the base-isolated buildings. When the basement is on fire, such as the role of convection,radiation will make laminated rubber bearing at a high temperature environment with the increasing temperature.The rubber and steel which composition the laminated rubber bearing will be changed at high temperature, therefore, it is necessary to research the performance of laminated rubber bearing for high temperature and after high temperature.This paper has collated the results of research at home and abroad, to a certain degree of comparative analysis on the performance of steel and rubber after high temperature, getting two materials material model under the high temperature, at the same time, introduced the relevant knowledge of temperature field theory.In this paper, based on the other, who did the fire resistance of laminated rubber bearing, to analysis of the dual non-linear methods using material non-linear and geometric nonlinear. In order to ISO-834 standard temperature - time to curve simulated fire (high temperature), temperature calculation and mechanical analysis using the three-dimensional coupled thermo-mechanical unit of the large-scale finite element analysis software ANSYS. Throw the analysis of reaction for high temperature on the laminated rubber bearing, getting the distribution of internal temperature of the venue of laminated rubber bearing.According to the rubber and steel plate in the highest temperature distribution of laminated rubber bearing, determined materials of rubber and steel plates after high-temperature, establishment of laminated rubber bearing finite element model after high-temperature, carry out a variety of simulation analysis of the laminated rubber bearing properties, carry out the test results analyzed with other scholars, determine the feasibility of model. The result of simulation analysis show that the laminated rubber bearing's level stiffness and vertical stiffness after the high temperature are lower than the normal temperature, and the simulation results are similar with experimental results.In addition, this paper use the established finite element model of laminated rubber bearing after high-temperature to simulation analysis the series isolation system which consisted of the laminated rubber bearing and column on isolated buildings after high temperature, and compared with the series isolation system's test after high-temperature, and arrived at a preliminary conclusions.Through simulation research on performance of the laminated rubber bearing after high-temperature is hoped that offing some suggestions about the temperature-related properties of the laminated rubber bearing.