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《World Information On Earthquake Engineering》 2001-04
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A random analytical approach for structures with random multi-point earthquake exciation

LIU Tian-yun1, LJU Guang-ting1, XUE Ying2 (1. Department of Hydraulic Engineering, Tsinghua University, Beijing 100084. China; 2. Nei Monggal Tongliao Dianye Ju, Nei Monggal 028000, China)  
The random earthquake multi-input is modeled as stationary random process vector. A two-step decomposition approach is proposed to transfer the correlative vector process into an independent one. The structural random response is obtained by mode-decomposition method. Furthermore, the power spectral densities of responses can be calculated directly. The proposed approach is an effective one, as it can deal with not only the multi-excitation problem and wave-propagation effect, but also the correlative one between structural modes easily.
【CateGory Index】: P315.9
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