Extension of Modal Pushover Analysis to Compute Member Forces
Extension of Modal Pushover Analysis to Compute Member Forces
复制标题
模态 Pushover 分析的扩展以计算杆件力
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
A. Chopra
中科院分区：
文献类型：
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作者：
R. Goel;A. Chopra
本文扩展了模态推覆分析（MPA）的程序，估计地震变形的建筑物计算杆件力的需求。地震需求计算为六个建筑物，每个分析20个地面运动。MPA和非线性反应历史分析（RHA）计算的地震需求的比较表明，MPA程序提供了很好的估计成员的力量。力的偏差（或误差）一般小于早期层间位移研究中所指出的偏差，并且与弹性建筑物的标准反应谱分析（RSA）中的误差相当。另一方面，四种FEMA-356力分布提供的构件力估计值可能是非线性RHA值的二分之一到四分之一。
This paper extends the modal pushover analysis (MPA) procedure for estimating seismic deformation demands for buildings to compute member forces. Seismic demands are computed for six buildings, each analyzed for 20 ground motions. A comparison of seismic demands computed by the MPA and nonlinear response history analysis (RHA) demonstrates that the MPA procedure provides good estimates of the member forces. The bias (or error) in forces is generally less than that noted in earlier investigations of story drifts and is comparable to the error in the standard response spectrum analysis (RSA) for elastic buildings. The four FEMA-356 force distributions, on the other hand, provide estimates of member forces that may be one-half to one-fourth of the value from nonlinear RHA.