组合基础隔震在建筑工程中的应用

隔震作为一种新的抗震技术,已广泛应用于新建和加固的建筑工程,同时,许多新型式的支座得到了开发和应用。组合基础隔震是一种新的隔震设计思想,能充分应用不同类型隔震支座的特性,有效降低上部结构地震反应。本文介绍了组合基础隔震在某一工程中的应用,工程中使用的支座包括普通橡胶隔震支座、铅芯橡胶隔震支座和弹性滑板支座三种类型,对全部使用支座进行了常规检测,结构计算采用等效线性法、能量包络法和时程反应分析等方法,计算结果表明:组合基础隔震能有效降低上部结构的反应,隔震层的变形控制在安全范围之内。

Application of combined base isolation to buildings

Seismic isolation,as a technique of innovative seismic design concept,has been widely used in both new and existing buildings to prevent the damage from earthquakes.At the same time,more and more new types of isolators were excogitated and used in engineering.The authors research a combined base isolation system,which includes many types of isolators, and formed an isolation layer to reduce the seismic responses of superstructure.And then a building that adopts the combined base isolation system is introduced,which includes the isolators of natural rubber bearings,lead rubber bearings and elastic sliding bearings,and so on.The routine testing of all applied isolators are carried out.The equivalent linear analysis,the energy envelope method and the time history analysis are adopted to calculate the responses of the structures and the results show that the combined base isolation system can effectively reduce the superstructure responses and the deformation of isolation layer may be limited within the range of safety.