行波效应对双塔楼结构抗震设计的影响
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摘要
以北京LG大厦为例,讨论了双塔结构多维地震动的行波激励效应对结构抗震设计值的影响。首先进行了结构静力荷载作用下的反应分析,并与结构在一致激励下的地震反应相组合,得到一致地震作用下结构抗震设计值;然后进行结构行波输入下的地震反应分析,将其与静力反应组合得到行波地震激励下结构抗震设计值。考察在一致输入和行波输入下得出的抗震设计值之间的差异,分析了不同的地震激励方式对结构抗震设计值的影响。
Taking Beijing LG Building as an example,the effect of multi-dimensional travelling wave excitation on seismic design value of twin-towers structures is discussed.First,the static response of the structure is analyzed and then combined with the seismic response of the structure under the uniform excitation to obtain the seismic design values of the structure.Second,the seismic response analysis of the structure under travelling wave excitation is carried out and then combined with its static response to obtain the seismic design value of the structure under the travelling wave excitation.The influence of the different types of seismic excitations on the seismic design value of the structure is analyzed by comparing the difference of the seismic design values obtained from two types of seismic excitations.
Taking Beijing LG Building as an example,the effect of multi-dimensional travelling wave excitation on seismic design value of twin-towers structures is discussed.First,the static response of the structure is analyzed and then combined with the seismic response of the structure under the uniform excitation to obtain the seismic design values of the structure.Second,the seismic response analysis of the structure under travelling wave excitation is carried out and then combined with its static response to obtain the seismic design value of the structure under the travelling wave excitation.The influence of the different types of seismic excitations on the seismic design value of the structure is analyzed by comparing the difference of the seismic design values obtained from two types of seismic excitations.
引文
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[3]刘哲.双塔结构的振动与抗风分析[D].成都:西南交通大学,2003.Liu Z.An analysis about the vibration and the windresistance of the double-tower structure[D].Chendu:Southwest Jiaotong University,2003.(in Chinese)
[4]Lia Q S,Chen J M.Nonlinear elastoplastic dynamicanalysis of single-layer reticulated shells subjected toearthquake excitation[J].Computers and Structures,2003,11(81):33-39.(in Chinese)
[5]Zanardo G,Hao H,Modena.Seismic response ofmulti2span simply supported bridges to a spatiallyvarying earthquake ground motion[J].EarthquakeEngineering and Structural Dynamics,2002,16(31):31-39.
[6]中华人民共和国建设部.GB 50011—2001建筑抗震设计规范[M].北京:中国建筑工业出版社,2002.Ministry of Construction of the People’s Republic ofChina.GB 50011-2001,Code for seismic design ofbuildings[M].Beijing:China Architecture&BulidingPress,2002.(in Chinese)
[7]石树中,沈建文,楼梦麟.基岩场地强地面运动加速度反应谱统计特征[J].同济大学学报(自然科学版)2,0023,0(11):1300-1304.Shi S Z,Shen J W,Lou M L.Statistic features ofresponse spectra of acceleration strong ground motionat rock sites[J].Journal of Tongji University(NaturalScience)2,0023,0(11):1300-1304.(in Chiness)
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