Three-dimensional dynamic analysis for multi-component earthquake spectra
Three-dimensional dynamic analysis for multi-component earthquake spectra
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DOI：
10.1002/eqe.4290100309
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发表时间：
1982-05
影响因子：
4.5
通讯作者：
E. Wilson;M. R. Button
中科院分区：
文献类型：
--
作者：
E. Wilson;M. R. Button
目前，三维结构在多分量地震作用下的分析和设计需要一种合理的方法。本文提出了多分量地震输入的一般设计准则。提出了一种三维动力分析的新方法，该方法估计结构内部指定点的最大位移、最大力或最大应力。对于每个计算出的最大值，计算相应的地震输入临界角。该方法可以很容易地结合到现有的地震分析计算机程序中，允许一次计算机运行就能产生所有可能的地震输入角度的平均最大响应值。轴向应力和弯曲应力的组合是在模态级计算的。结果表明，与按最大轴力和最大弯矩计算应力相比，组合模式应力得到的估计值较低。此外，该方法无需修改即可用于对任意爆炸或海浪频谱进行设计校核。
At the present time, there is a need for a rational approach for the analysis and design of three-dimensional structures subjected to multi-component earthquake motions. In this paper, a general design criterion for multi-component earthquake input is proposed. A new method for three-dimensional dynamic analysis is presented which estimates maximum displacements, forces or stresses for specified points within a structure. For each maximum value calculated, the corresponding critical angle of earthquake input is evaluated. The method is readily incorporated into existing computer programs for earthquake analysis, allowing one computer run to produce mean maximum response values for all possible angles of earthquake input. Combined axial and bending stresses are calculated at the modal level. It is shown that combining modal stresses yields lower estimates than if stresses are evaluated from maximum axial forces and moments. In addition, the method can be used without modifications to perform design checks for arbitrary blast or seawave spectra.