新型隔震支座理论模型及地震随机响应分析

Theoretical model of new type isolation bearing and random response analysis of earthquake

结合传统摩擦摆隔震支座,增加上拨叉板和下拨叉板,设计出一种新型隔震支座模型。介绍了新型支座 的整体结构及工作原理,说明了地震波的选取及调整方法。利用 ABAQUS 分析软件建立有限元模型,研究新型隔震 支座在 taft 和 EI Centro 两种地震波作用下的位移响应结果。选用经过地震波调整方法调整后的两种波作为输入 量,对比分析新型隔震支座在不同地震波烈度下的位移响应。从拨叉板结构参数中选取拨叉间隙量和摩擦系数两 个参数,重点分析了这两个参数对新型隔震支座在 8 度设防烈度下的动态响应结果的影响,对新型隔震支座的合 理设计提供了一定的参考。对比分析了传统摩擦摆支座和新型隔震支座在地震作用下的响应结果,新型隔震支座 在控制滑移量方面具有显著的优势。

Combined with the traditional friction pendulum isolation bearing, by adding the upper and lower shifting fork plate, this paper designs a new type of isolation bearing model. The overall structure and working principle of the new bearing are introduced, and the selection and adjustment method of the seismic wave are explained. The finite element model is established by using ABAQUS analysis software to study the displacement response results of the new isolation bearing under the action of taft and EI Centro seismic waves. Comparisons and analyses of the displacement responses of the new isolation bearings under di fferent seismic wave intensities are carried out by selecting two kinds of waves adjusted by seismic wave adjustment method as input quantities. In addition, with two parameters of fork clearance and friction coe fficient selected from the structural parameters of the shifting fork plate, analysis focuses are paid on the in fluence of these two parameters on the dynamic response results of the new isolation bearing under 8 degree forti fication intensity. It provides some references for the rational design of new isolation bearings. Compared with the response of traditional friction pendulum bearing and new isolation bearing under earthquake, the analysis results show that the new isolation bearing has signi ficant advantages in controlling slip.