Non-stationary random response of pedestrian bridge under pedestrian load excitation

Abstract

Abstract: The differential quadrature-probabilistic collocation (DQ-PEM) method, which combines the virtual excitation method and differential quadrature method, is used to study the non-stationary random response of pedestrian bridges under pedestrian excitation. Different from the previous virtual excitation method, this method, based on the simplified spectral model, establishes the spectral density of the pedestrian forcing function, to obtain the multi-modal of the multi-degree of freedom system under pedestrian load. The accuracy and effectiveness of the proposed method are verified by the engineering case. Furthermore, the stochastic vibration problems of beam-type structures under pedestrian loading at different velocities and under various constraint conditions are discussed.

Key words: spectral model, pedestrian load, virtual excitation, non-stationary random response, DQ-PEM

CLC Number:

TU311.3

ZHU Qian-kun, ZENG Xin. Non-stationary random response of pedestrian bridge under pedestrian load excitation[J]. Journal of Lanzhou University of Technology, 2024, 50(1): 110-115.

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