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Interaction and Multiscale Mechanics Volume 3, Number 4, December 2010 , pages 299-308 DOI: https://doi.org/10.12989/imm.2010.3.4.299 |
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Effect of road surface roughness on indirect approach for measuring bridge frequencies from a passing vehicle |
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K.C. Chang, F.B. Wu and Y.B. Yang
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| Abstract | ||
| The indirect approach for measuring the bridge frequencies from the dynamic responses of a passing vehicle is a highly potential method. In this study, the effect of road surface roughness on such an approach is studied through finite element simulations. A two-dimensional mathematical model with the vehicle simulated as a moving sprung mass and the bridge as a simply-supported beam is adopted. The dynamic responses of the passing vehicle are solved by the finite element method along with the Newmark B method. Through the numerical examples studied, it is shown that the presence of surface roughness may have negative consequence on the extraction of bridge frequencies from the test vehicle. However, such a shortcoming can be overcome either by introducing multiple moving vehicles on the bridge, besides the test vehicle, or by raising the moving speed of the accompanying vehicles. | ||
| Key Words | ||
| road surface; roughness; bridge; frequencies; passing vehicle. | ||
| Address | ||
| K.C. Chang, F.B. Wu and Y.B. Yang: Dept. of Civil Engineering, National Taiwan University, Taipei, Taiwan | ||
