大底盘双塔楼在不同边界条件下的动力时程分析
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摘要
大底盘多塔楼结构是底部相连上部分开的一种复杂结构形式,目前国内外对这种结构体系的抗震性能研究较少.应用大型有限元软件ANSYS建立了大底盘双塔楼有限元模型,采用动力时程分析法对有限元模型进行地震响应计算,并对比分析了在弹性边界条件与刚性边界条件下大底盘双塔楼结构的抗震性能.研究结果表明,弹性边界下模型的动力响应比刚性边界下的动力响应大,弹性边界下模型可以实现地基的弹性恢复性能,更加接近实际情况.
A Multi-tower structure with enlarged base is a complex structure form which is connected at the bottom but departed at the top,and the research on the seismic behavior of this structure system is less at home and abroad. The finite element software ANSYS was adopted to establish the finite element model of twin-tower building with enlarged base,the dynamic time history analysis method was used to calculate seismic response for the finite element model,and the seismic behavior of twin-tower building with enlarged base was compared and analyzed under elastic boundary conditions and rigid boundary conditions. The results showed that the dynamic response under elastic boundary conditions was larger than the one under rigid boundary conditions,and the model under elastic boundary conditions could realize elastic recovery performance of foundations,which was more closer to the actual situation.
A Multi-tower structure with enlarged base is a complex structure form which is connected at the bottom but departed at the top,and the research on the seismic behavior of this structure system is less at home and abroad. The finite element software ANSYS was adopted to establish the finite element model of twin-tower building with enlarged base,the dynamic time history analysis method was used to calculate seismic response for the finite element model,and the seismic behavior of twin-tower building with enlarged base was compared and analyzed under elastic boundary conditions and rigid boundary conditions. The results showed that the dynamic response under elastic boundary conditions was larger than the one under rigid boundary conditions,and the model under elastic boundary conditions could realize elastic recovery performance of foundations,which was more closer to the actual situation.
引文
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[2]Edward L Wilson.Three-dimensional static and dynamic analysis of structure[M].3rd ed.California:Computers and Structures,Inc.,2002.
[3]习朝位,蒋义平,佟道林,等.大底盘双塔楼连体结构抗震试验研究[J].建筑结构,2009(5):102-107.
[4]胡兴福,熊峰,李辉.落地剪力墙厚度对大底盘双塔楼结构抗震性能的影响[J].四川建筑科学研究,2005(4):88-90.
[5]吴耀辉,娄宇,李爱群,等.大底盘多塔结构抗震分析研究进展[J].建筑结构,2003,33(9):16-19.
[6]赵西安.高层建筑结构在竖向地震作用下的时程分析[J].建筑结构学报,1994,15(3):2-10.
[7]沈聚敏,周锡元,高小旺,等.抗震工程学[M].北京:中国建筑工业出版社,2000.
[8]刘晶波,杜义欣,闫秋实.粘弹性人工边界及地震动输入在通用有限元软件中的实现[J].防灾减灾工程学报,2007(4):41-42.
[9]小飒工作室.最新经典ANSYS及Workbench教程[M].北京:电子工业出版社,2004.
[10]中华人民共和国住房和城乡建设部.GB 50009—2012建筑结构荷载规范[S].北京:中国建筑工业出版社,2012.
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