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首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Three-dimensional modal pushover analysis of buildings subjected to two components of ground motion, including its evaluation for tall buildings
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Three-dimensional modal pushover analysis of buildings subjected to two components of ground motion, including its evaluation for tall buildings

机译：受到地震动两个分量影响的建筑物的三维模态推覆分析，包括对高层建筑物的评估

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摘要

The modal pushover analysis (MPA) procedure, presently restricted to one horizontal component of ground motion, is extended to three-dimensional analysis of buildings—symmetric or unsymmetric in plan— subjected to two horizontal components of ground motion, simultaneously. Also presented is a variant of this method, called the practical modal pushover analysis (PMPA) procedure, which estimates seismic demands directly from the earthquake response (or design) spectrum. Its accuracy in estimating seismic demands for very tall buildings is evaluated, demonstrating that for nonlinear systems this procedure is almost as accurate as the response spectrum analysis procedure is for linear systems. Thus, for practical applications, the PMPA procedure offers an attractive alternative whereby seismic demands can be estimated directly from the (elastic) design spectrum, thus avoiding the complications of selecting and scaling ground motions for nonlinear response history analysis.
机译：目前仅限于地震动的一个水平分量的模态推覆分析（MPA）程序被扩展到同时承受两个地震动的水平分量的建筑物的三维分析（平面图中对称或不对称）。还介绍了此方法的一种变体，称为实际模态推覆分析（PMPA）程序，该程序直接从地震响应（或设计）频谱估算地震需求。评估了其在估计非常高的建筑物的地震需求时的准确性，表明对于非线性系统，此过程几乎与对于线性系统的响应谱分析过程一样准确。因此，对于实际应用，PMPA程序提供了一种有吸引力的替代方法，可以直接从（弹性）设计范围估算地震需求，从而避免了为非线性响应历史分析选择和缩放地面运动的复杂性。

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