减隔震技术对9度近断层区框架结构抗震性能影响与经济性分析  

Impact and economic analysis of seismic mitigation and isolation techniques on seismic performance of frame structures in 9⁃degree near⁃fault zone

作　　者：潘毅[1,2] 晏方浩 熊耀清 金杨颜[1] 胡伟 PAN Yi;YAN Fanghao;XIONG Yaoqing;JIN Yangyan;HU Wei(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;Key Laboratory of Seismic Engineering of Sichuan Province,Chengdu 610031,China;China Southwest Architecture Design and Research Institute Co.,Ltd,Chengdu 610042,China)

机构地区：[1]西南交通大学土木工程学院,成都610031 [2]抗震工程技术四川省重点实验室,成都610031 [3]中国建筑西南设计研究院有限公司,成都610042

出　　处：《建筑结构》2024年第20期34-42,共9页Building Structure

基　　金：中建股份科技研发课题(CSCEC⁃2023⁃Z⁃18);中建西南院科技研发课题(R⁃2022⁃61⁃0B⁃D⁃2022)。

摘　　要：为研究减隔震技术对9度近断层区框架结构抗震性能影响及其经济性,以某多层框架结构为研究对象,在保证结构力学指标为85%的规范限值的原则下,对其分别进行抗震、减震、隔震设计,采用ETABS软件建立结构的抗震、减震、隔震模型并对其进行近断层和非近断层地震动作用下的抗震性能对比分析,以及工程量和经济性分析。结果表明,各模型在近断层地震动下的反应大于非近断层地震动下的。在近断层罕遇地震下,相较于抗震模型,隔震模型最大层间位移角减小6898%,楼面峰值加速度减小7677%,楼层剪力减小8367%;相较于抗震、减震模型,隔震模型在近断层多遇地震和设防地震下的响应及填充墙破坏程度最小,隔震结构抗震性能最优。相较于抗震模型,减震、隔震模型造价分别降低857%、554%,所以减震设计的工程造价最低。To investigate the impact of seismic mitigation and isolation techniques on seismic performance of frame structures in 9-degree near-fault zone and its economic analysis,a multistory frame structure was selected as the research object.On the principle of ensuring that the structural mechanical indicators are 85%of the code limits,seismic design,seismic mitigation design and isolation design were implemented.ETABS software was used to establish seismic model,seismic mitigation model and isolation model of the structure,and comparative analysis of its seismic performance under action of near-fault and non-near-fault ground motions was conducted,as well as engineering quantity and economic analyses.The results show that the responses of each model under near-fault ground motions are larger than those of the non-near-fault ground motions.Under rare earthquakes near faults,compared to seismic model,the maximum inter-story displacement angle of the isolation model is reduced by 6898%,the peak acceleration of floor is reduced by 7677%,and the shear force of floor is reduced by 8367%.Compared to seismic and isolation model,the response of isolation model is minimized under the multiple-occurrence and fortification earthquakes and the damage degree of its infill wall is minimized,so the seismic performance of isolation structure is optimal.Compared to the seismic model,the construction cost of seismic mitigation and isolation model is reduced by 857%and 554%respectively,therefore,the construction cost of the project designed by seismic mitigation is the lowest.

关 键 词：9度设防烈度 近断层地震动 框架结构 隔震设计 减震设计 抗震性能 经济性 

分 类 号：TU352.1[建筑科学—结构工程] TU375.4