Author(s): Xuan-toan Nguyen, Kuriyama Yukihisa, Duy-thao Nguyen
Published in: International Journal of Engineering Research & Technology
License: This work is licensed under a Creative Commons Attribution 4.0 International License.
Volume/Issue: Volume. 6 - Issue. 06 , June - 2017
This article presents random vibration analysis of dynamic vehicle-bridge interaction due to road unevenness based on the Finite element method and Monte-Carlo simulation method. The road unevenness are described by a zero-mean stationary Gaussian random process. The vehicle is a dumper truck with three axles. Each axle of vehicle is idealised as two mass dynamic system, in which a mass is supported by a spring and a dashpot. The structural bridge are two-span slab beam concrete, are simulated as bending beam elements. The finite element method is applied to established the overall model of vehicle-bridge interaction. Galerkin method and Green theory are used to discrete the motion equation of vehicle-bridge system in space domain. Solutions of the motion equations are solved by mean of Runge-Kutta-Mersion method (RKM) in time domain. The numerical results are in good agreement with full-scale field testing results of the slab beam concrete at NguyenTriPhuong bridge in Danang city, Vietnam. Also, the effects of road surface condition on dynamic impact factor of bridge are investigated detail. The numerical results show that dynamic impact factor of bridge has increased significantly when road unevenness have varied from Grade A-road to Grade E-road according to ISO 8608:1995 “Mechanical vibration - Road surface profiles – Reporting of measured data”.
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