风雨操场建筑屋盖隔震效果分析

Seismic Isolation Effect Analysis for Roof Grid Structure of Playground Building

为研究橡胶支座隔震装置在网架结构屋盖中的隔震工作机理及隔震效果,选取某中学风雨操场作为研究对象,借助有限元软件对屋盖隔震模型在不同地震动下进行动力弹塑性时程分析,得出其水平及竖向地震响应.分析结果表明:在整体结构的基本设防目标不降度的情况下,该类隔震布置方式可以改变风雨操场建筑结构的抗震性能,不仅显著降低了上部网架本身的地震反应,也有效降低了下部框架结构的地震响应.

In order to study the isolation mechanism and effect of rubber bearing isolation in a roof grid structure,a middle school playground is selected as the research object.Dynamic elastic-plastic time history analyses of the roof isolation model under different ground motions are carried out by means of finite element software,and the horizontal and vertical seismic responses are obtained.The analysis results show that this kind of isolation arrangement can change seismic performance of the playground building structure,not only significantly reduce the seismic response of the upper grid structure,but also effectively reduce the seismic response of the lower frame.