带抗风支座的基础隔震结构减震分析  

Seismic reduction analysis of base-isolated structures with wind-resistant support

作　　者：李飞燕[1] 黄丹青 LI Feiyan;HUANG Danqing(School of Civil Engineering,Xiamen University Tan Kah College,Zhangzhou 363105,China)

机构地区：[1]厦门大学嘉庚学院土木工程学院,福建漳州363105

出　　处：《厦门大学学报（自然科学版）》2021年第6期1083-1089,共7页Journal of Xiamen University：Natural Science

基　　金：福建省中青年教师教育科研项目(JAT170835);漳州市自然科学基金(ZZ2018J24)。

摘　　要：提出利用抗风支座协同铅芯橡胶支座来解决强风地区隔震结构抗风承载力和减震效果矛盾的难题.对抗风支座的构造和现场安装进行设计,以厦门某教学楼为背景工程,结合《建筑抗震设计规范》(GB 50011—2010),利用有限元软件ETABS建模并进行非线性时程分析,重点研究带抗风支座基础隔震结构减震效果.通过有限元分析和静载荷抗剪试验验证了抗风支座分阶段工作机制.研究结果表明:增设抗风支座可以减少铅芯橡胶支座数量,整体减震效果显著;抗风支座在正常使用和小震阶段协同铅芯橡胶支座参与工作,中震阶段破坏退出工作,分阶段工作机制清晰;抗风支座协同铅芯橡胶支座可以解决强风地区隔震结构抗风承载力和减震效果难协调的问题,该组合隔震体系具有较好的工程应用价值.It is proposed to resolve the contradiction between wind-resistant strength and seismic reduction effects of isolated structures in areas blown by the strong wind by virtue of the synergy of wind-resistant support and lead-rubber bearing.The structure and field installation of the wind-resistant support are designed.Moreover,with the teaching building of a school in Xiamen serving as the background project,and in consideration of the Code for Seismic Design of Buildings(GB 50011—2010),modeling with finite element software ETABS and nonlinear time-history analyses are conducted.Then,we focus on the study of the seismic reduction of the base isolated structure with wind-resistant support.The phased working mechanism of the wind-resistant support is verified with finite element analyses and static load shearing test.According to the research results,additional wind-resistant supports are able to decrease the number of lead-rubber bearings,yielding better seismic reduction effects.Moreover,these wind-resistant supports perform their functions in cooperation with lead-rubber bearings under normal application and frequent earthquake conditions,but suspend the working status during the fortification earthquake.Therefore,an apparent working mechanism exists by stages.It is wind-resistant supports,together with lead-rubber bearings that are capable of addressing the difficulty in coordinating the wind-resistant bearing capacity with the seismic reduction effect of the isolated structures in strong wind areas,indicating an excellent engineering application value.

关 键 词：抗风支座 基础隔震结构 减震分析 组合隔震体系 

分 类 号：TU311.3[建筑科学—结构工程]