设置铅芯滑移隔震支座框架结构的地震响应分析

Seismic response analysis of frame structure with lead core sliding seismic isolation bearing

以设置铅芯滑移隔震支座框架结构为研究对象,建立实体空间有限元计算模型。通过与设置固定支座和无铅铅芯滑移隔震支座计算对比,分析研究铅芯滑移隔震支座的耗能性、自复位性、层间位移、各节点加速度以及地震输入结构能量和动能方面的优越性。结果表明:设置铅芯滑移隔震支座框架结构层间位移比未隔震结构大大减小,比无铅芯滑移隔震框架结构的小,且支座滑动位移小,地震输入结构能量和动能减少。分析结果进一步证明,铅芯滑移隔震支座具有良好的隔震和耗能性能,减小结构的地震响应,更具有工程适用性。

Frame structure with lead core sliding seismic isolation bearing is studied, and the finite element calculation model of solid space is established, the calculation is compared with the setting of a fixed bearing and a lead free lead slip isolation bearing.The advantages of energy dissipation, self reset, interlayer displacement, acceleration of each node, and energy and kinetic energy of seismic input structure are analyzed.The results show that:the interlayer displacement of the frame structure with lead core sliding seismic isolation bearing is greatly reduced than that of the unisolated structure.It is smaller than the unleaded core sliding frame structure, and the sliding displacement of the support is small, and the energy and kinetic energy of the seismic input structure are reduced.The result of the analysis further proves that the lead sliding isolation bearing has good seismic isolation and energy dissipation performance, and reduces the seismic response of the structure, so it is more applicable to engineering.