竖向地震作用下超限高层混凝土大悬挑结构抗震性能试验  

Experimental Study on Seismic Performance of High-rise Concrete Cantilever Structure under Vertical Earthquake

作　　者：林秋怡[1] Lin Qiuyi(Chuzhou Vocational and Technical College,Chuzhou 239000,China)

机构地区：[1]滁州职业技术学院建筑工程学院,安徽滁州239000

出　　处：《廊坊师范学院学报（自然科学版）》2021年第3期81-86,共6页Journal of Langfang Normal University(Natural Science Edition)

基　　金：安徽省教育厅2019年度安徽高校优秀拔尖人才培育项目(重点青年人才)“竖向地震作用下大悬挑结构的抗震性能分析”(gxyqZD2019129)。

摘　　要：为验证竖向地震对建筑结构的破坏性,选取某8层超限高层混凝土大悬挑框架结构建筑为试验对象。通过SAP2000软件建立试验对象的有限元分析模型,分析结构在水平两向和水平加竖向三向地震作用下的地震反应,以及不同工况、不同地震频率下,输入不同地震波的大悬挑结构时程。结果表明,竖向基底反力较易受竖向地震影响,导致剪力和弯矩均呈现增大趋势;结构的竖向位移受竖向地震影响较大,水平位移不易受其影响;El-Centro波作用下的楼层侧移相对较大,Pasadena波作用下的楼层位移相对较小;竖向地震作用下竖向分量对水平侧移所产生的影响不大。In order to verify the destructive effect of vertical earthquake on building structure,an 8—storey transfinite concrete cantilevered frame structure was selected as the test object.The finite element analysis model of the test object is established by SAP2000 software to analyze the seismic response of the structure under horizontal two-way earthquake and horizontal plus vertical three-way earthquake,and to input the time history of large cantilevered structures with different seismic waves under different conditions and different seismic frequencies.The results show that the vertical base reaction is easily influenced by the vertical earthquake,which leads to the increase of the shear force and bending moment,and the vertical displacement of the structure is largely influenced by the vertical earthquake,so the horizontal displacement is not easy to be influenced by it.

关 键 词：建筑 竖向地震 超限高层 大悬挑 地震波 

分 类 号：TU352[建筑科学—结构工程]