Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/13615
Title: Dynamic analysis of bridge with non-Gaussian uncertainties under a moving vehicle
Authors: Wu, SQ
Law, SS
Keywords: Bridgevehicle interaction
KarhunenLove expansion
non-Gaussian
Polynomial Chaos expansion
Road surface roughness
Spectral stochastic finite element method
Issue Date: 2011
Publisher: Elsevier Sci Ltd
Source: Probabilistic engineering mechanics, 2011, v. 26, no. 2, p. 281-293 How to cite?
Journal: Probabilistic Engineering Mechanics 
Abstract: An analysis method on the bridgevehicle interaction problem with uncertainties is proposed. The bridge is modeled as a simply supported EulerBernoulli beam with non-Gaussian material parameters with a vehicle moving on top modeled by a deterministic four degrees-of-freedom massspring system. The non-Gaussian uncertainty in bridge is modeled by the Spectral Stochastic Finite Element Method (Ghanem and Spanos (1991) [17]), and the mathematical model of the coupled bridgevehicle system, with the road surface roughness assumed as a Gaussian random process, will be solved by the Newmark-β method. The proposed model is verified by the Monte Carlo Simulation with numerical examples. Different levels of uncertainties in both the excitation and system parameters are investigated. Criteria on the selection of both the order of Polynomial Chaos and the threshold for truncation in the KarhunenLove expansion are provided. Results show that the proposed algorithm is promising for the dynamic analysis of the bridgevehicle interaction problem even with a high level of system and excitation uncertainties.
URI: http://hdl.handle.net/10397/13615
DOI: 10.1016/j.probengmech.2010.08.004
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