Seismic spatial effects on long-span bridge response in nonstationary inhomogeneous random fields

The long-span bridge response to nonstationary multiple seismic random excitations is investigated using the PEM (pseudo excitation method). This method transforms the nonstationary random response analysis into ordinary direct dynamic analysis, and therefore, the analysis can be solved conveniently using the Newmark, Wilson-θ schemes or the precise integration method. Numerical results of the seismic response for an actual long-span bridge using the proposed PEM are given and compared with the results based on the conventional stationary analysis. From the numerical comparisons, it was found that both the seismic spatial effect and the nonstationary effect are quite important, and that both stationary and nonstationary seismic analysis should pay special attention to the wave passage effect.

作 者： Lin Jiahao Zhang Yahui Zhao Yan   作者單位： Lin Jiahao(State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116023, China)

Zhang Yahui(Chongqing Communications Research & Design Institute, Chongqing 400067, China)

Zhao Yan(State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116023, China;Chongqing Communications Research & Design Institute, Chongqing 400067, China) 

刊 名： 地震工程與工程振動（英文版）  SCI 英文刊名： EARTHQUAKE ENGINEERING AND ENGINEERING VIBRATION  年，卷(期)： 2005 4(1)  分類號： P315  關鍵詞： earthquake   nonstationary   random vibration   multiple excitation   long-span bridge  

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