高层建筑钢结构在多维地震动输入作用下的反应
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摘要
本文首先建立了非对称建筑结构在二维水平地震动作用下的一般性振型分解方法,探讨了利用反应谱法计算二维水平地震动作用下地震效应所需要解决的问题。通过时程分析法,对大量的工程算例分别进行了一维水平地震动和二维水平地震动作用下的数值计算,同时对结构在不同情况下的地震效应最大值相互之间的比例关系进行了统计,探讨了利用相互垂直单向地震作用效应的组合来代替双向地震作用效应的可行性,并将此推广至反应谱法中。文章最后提出了一个二维水平地震动作用下的地震效应的反应谱计算方法,供工程设计参考。
The general mode superposition procedure of the unsymmetrical structure under two dimensional seismic actions was first set up. Based on this, some questions which will be confronted in calculating the response of structure under two dimensional seismic actions by the response spectrum method were discussed. Time history analysis of many engineering examples under single dimensional component or two dimensional components of ground motion was performed. According to these numerical computations, the ratios among the maxima of seismic responses of structure under different cases were classified and compared in order to discuss the feasibility of substituting the seismic response under double components of ground motion with the combination of two seismic responses of single components of ground motion, and this conclusion was extended to the response spectrum method. Finally, a responses spectrum method of computing the seismic response under the multi dimensional components of ground motion is put forward for practice.
The general mode superposition procedure of the unsymmetrical structure under two dimensional seismic actions was first set up. Based on this, some questions which will be confronted in calculating the response of structure under two dimensional seismic actions by the response spectrum method were discussed. Time history analysis of many engineering examples under single dimensional component or two dimensional components of ground motion was performed. According to these numerical computations, the ratios among the maxima of seismic responses of structure under different cases were classified and compared in order to discuss the feasibility of substituting the seismic response under double components of ground motion with the combination of two seismic responses of single components of ground motion, and this conclusion was extended to the response spectrum method. Finally, a responses spectrum method of computing the seismic response under the multi dimensional components of ground motion is put forward for practice.
引文
1刘季.在多维地震动复合作用下结构的反应和建筑结构扭转地震效应犤J犦.哈尔滨建筑工程学院学报,1986,(2).
2AKTANAE.R/Ccolumnearthquakeresponseintwodimensions犤J犦.JournalofStructuralDivision,ASCE,1974,100(12).
2AKTANAE.R/Ccolumnearthquakeresponseintwodimensions犤J犦.JournalofStructuralDivision,ASCE,1974,100(12).
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