考虑温度效应的大底盘双塔结构地震反应分析
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摘要
针对大底盘双塔结构温度应力问题,通过有限元软件SAP2000建模对考虑温度和地震作用下的某大底盘多塔结构进行了反应谱分析,定量地分析了温度作用对大底盘双塔高层结构的内力分布和抗震性能的影响。结果表明,温度效应虽对结构的抗震性能影响不大,但会造成局部构件应力集中,也会改变双塔底部结构构件的内力分布情况;落地剪力墙的抗剪能力会被削弱,致使底层框架柱承担更多的地震剪力,在抗震设计时应予以注意。
The currently study on two- tower structure with enlarged base only focused on the seismic behavior and the consideration of the temperature stress was rarely taken into account. To address the above problem,the seismic behavior of structure under the combined effect of temperature and seismic action was discussed under response spectrum analysis by using the finite element analysis software SAP2000. It can be concluded that the temperature effect on the seismic performance is not huge,but it causes stress concentration in the local components of twin- towers structure,and the distribution of internal forces are changed; shear capacity of the wall are weakened,resulting in the bigger seismic shear force on the bottom column of frame,it should be pay more attention in the seismic design.
The currently study on two- tower structure with enlarged base only focused on the seismic behavior and the consideration of the temperature stress was rarely taken into account. To address the above problem,the seismic behavior of structure under the combined effect of temperature and seismic action was discussed under response spectrum analysis by using the finite element analysis software SAP2000. It can be concluded that the temperature effect on the seismic performance is not huge,but it causes stress concentration in the local components of twin- towers structure,and the distribution of internal forces are changed; shear capacity of the wall are weakened,resulting in the bigger seismic shear force on the bottom column of frame,it should be pay more attention in the seismic design.
引文
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[2]LIM J,BIENKIEWICZ B.Effects of structural and aerodynamic couplings on the dynamic response of tall twin buildings with a skybridge[J].ASCE,2009,9(1):1-9.
[3]LIM J,BIENKIEWICZ B,RICHARDS E.Modeling of structural coupling for assessment of modal properties of twin tall buildings with a skybridge[J].Journal of Wind Engineering and Industrial Aerodynamics,2011,99(5):615-623.
[4]GB50010-2010,混凝土结构设计规范[S].
[5]CHEN H T,LIN J Y.Application of the hybrid method to transient heat conduction in one-dimensional composite layers[J].Computers and Structures,1991,39(5):451-458.
[6]KULIKOV G M,PLOTNIKOVA S V.Heat conduction analysis of laminated shells by a sampling surfaces method[J].Mechanics Research Communications,2014(55):59-66.
[7]THRELKELD J L.Themral enviormnental engineering[M].Englewood Clibs,NJ:Prentice-Hall,1970.
[8]KAUSHIKA N D,SHMARA P K.Solar thermal analysis of honey comb cover system for energy conservation in an air conditioned building[J].Energy and Buildings,1992(18):45-49.
[9]DVAIES G.Solutions to fourier equation and unsteady heat flow through structures[J].Building and Environment,1995,30(3):309-321.
[10]张国新.大体积混凝土结构温度场与温度应力仿真分析程序包SAPTIS编制说明及用户手册[M].北京:中国水利水电科学研究院,2009.
[11]刘兴法.混凝土结构的温度应力分析[M].北京:人民交通出版社,1991.
[12]赵娟.超长高层建筑结构温度问题研究[D].郑州:郑州大学,2002.
[13]宋琛琛,于明博.考虑温度应力的某大底盘双塔结构裙楼楼板地震反应分析[J].佳木斯大学学报,2014,32(5):691-695.
[14]GB50009-2012,建筑结构荷载规范[S].
[15]代慧娟.大型火电厂主厂房混凝土结构温变响应研究[D].西安:西安建筑科技大学,2011.
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