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Vibration analysis of axially loaded bridges traversed by accelerating vehicles with passenger dynamics

Asl, P. H ; Sharif University of Technology | 2004

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  1. Type of Document: Article
  2. Publisher: 2004
  3. Abstract:
  4. An investigation into the dynamics of vehicle-passenger-structure-induced vibration of suspension bridges traversed by accelerating vehicles is carried out. The vehicle including the driver and passengers is modeled as a half-car planer model with six degrees-of-freedom. In addition, the stiffness of compliant bushings at the connecting points of the shock absorbers to the body is considered. The bridge is assumed to obey the Timoshenko beam theory with axial load and arbitrary conventional boundary conditions. The roughness of the bridge is assumed as a differentiable function of location. Due to continuously moving the location of the variable loads on the bridge, and in the presence of damping force, the governing differential equations become complicated. The numerical simulations presented here are for the case of a vehicle traveling at a constant acceleration on a uniform bridge with rough surface and simply supported end conditions. The relationship between the bridge vibration characteristics, bridge roughness, and the vehicle speed and acceleration is rendered, which yields into search for a particular acceleration and speed that determines the maximum value of the dynamic deflection and the bending moment of the bridge. Results obtained from the Timoshenko beam theory are compared with those from the Euler-Bernoulli beam for which full agreements are found. Finally, the maximum deflection of the beam under moving loads is compared with that of the case with static loading
  5. Keywords:
  6. Bridges (Structures) ; Suspension bridges ; Stiffness ; Shock absorbers ; Pavement live loads ; Differential equations ; Degrees of freedom ; Damping ; Computer simulation ; Bushings ; Dynamics (Mechanics) ; Vibration analysis ; Surface roughness ; Deflection ; Boundary-value problems ; Timoshenko beam theory
  7. Source: Proceedings of the 7th Biennial Conference on Engineering Systems Design and Analysis - 2004, Manchester, 19 July 2004 through 22 July 2004 ; Volume 2 , 2004 , Pages 275-280 ; 0791841731 (ISBN); 9780791841730 (ISBN)
  8. URL: https://asmedigitalcollection.asme.org/ESDA/proceedings-abstract/ESDA2004/4174X/275/305569