Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/29167
Title: Dynamic analysis of bridge-vehicle system with uncertainties based on the finite element model
Authors: Wu, SQ
Law, SS
Keywords: Bridgevehicle system
Dynamic
Finite element method
Gaussian
KarhunenLove expansion
Moving forces
Uncertainties
Issue Date: 2010
Publisher: Elsevier Sci Ltd
Source: Probabilistic engineering mechanics, 2010, v. 25, no. 4, p. 425-432 How to cite?
Journal: Probabilistic Engineering Mechanics 
Abstract: A new method of dynamic analysis on the bridge-vehicle interaction problem considering uncertainties is proposed in this paper. The bridge is modeled as a simply supported EulerBernoulli beam with Gaussian random elastic modulus and mass density of material with moving forces on top. These forces are time varying with a coefficient of variation at each time instance and they are considered as Gaussian random processes. The mathematical model of the bridge-vehicle system is established based on the finite element model in which the Gaussian random processes are represented by the KarhunenLove expansion and the equations will be solved by the Newmark-β method. The proposed method is compared with the Monte Carlo method in numerical simulations with good agreements for cases with different vehicle speed and level of uncertainties in the excitation and system parameters. The mean value and variance of the structural responses are found to be very accurate even with large uncertainties in the excitation forces. The proposed method is also found to have superior performance in the computational efficiency compared with the Monte Carlo method.
URI: http://hdl.handle.net/10397/29167
DOI: 10.1016/j.probengmech.2010.05.004
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