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首页> 外文期刊>Journal of Earthquake Engineering >Multi-Component Seismic Response Analysis - A Critical Review
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Multi-Component Seismic Response Analysis - A Critical Review

机译：多分量地震反应分析-评述

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Issues related to multi-components seismic response analysis are critically reviewed and their implications with respect to the current codified approaches are studied. The issues specifically addressed are: (1) the directions of earthquake forces to excite a structure when the direction of the potential epicenter is known; (2) different commonly used combination rules to obtain the critical response when responses are available in different directions; and (3) the applicability of the combination rules for elastic and inelastic analyses. Based on an extensive parametric study consisting of three-dimensional 1-, 3-, 8-, and 15- story buildings made of moment-resisting steel frames and 20 recorded earthquakes, it is observed that the principal components produce larger responses than the normal components. The 30% and SSRS rules generally underestimate the axial loads in columns. The 30% combination rule is slightly better than the SSRS rule. For both rules, the uncertainty in the estimation of the axial loads in terms of COV is very large (about 25%). The statistics obtained for axial loads and total base shear indicate that the combination rules are applicable for both elastic and inelastic cases. The critical response could be obtained for an orientation different from that of the principal components. The differences are found to be slightly greater for the scaled earthquakes producing a considerable inelastic behavior. Considering the enormous amount of efforts needed to address the directionality effect, it is believed that the responses obtained by the principal components will be acceptable in most cases; however, for critical structures the components should be rotated to obtain the critical responses.
机译：严格审查了与多分量地震响应分析有关的问题，并研究了它们对当前编码方法的影响。具体解决的问题是：（1）在已知潜在震中方向的情况下地震力激发结构的方向； （2）当不同方向的响应可用时，使用不同的常用组合规则来获得关键响应； （3）组合规则在弹性和非弹性分析中的适用性。根据广泛的参数研究，包括由抗弯钢框架组成的三维1、3、8和15层建筑，并记录了20次地震，观察到主要成分产生的响应比正常情况大。组件。 30％和SSRS规则通常会低估圆柱中的轴向载荷。 30％组合规则比SSRS规则稍好。对于这两个规则，根据COV估算轴向载荷的不确定性非常大（约25％）。从轴向载荷和总基础剪力获得的统计数据表明，组合规则适用于弹性和非弹性情况。对于不同于主要部件的定向可以获得关键响应。对于产生相当大的非弹性行为的规模地震，发现差异更大。考虑到解决方向性效应需要付出大量的努力，人们认为，在大多数情况下，由主要组成部分获得的回应是可以接受的；但是，对于关键结构，应旋转组件以获得关键响应。

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