Wind and Structures

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Assessment of ride safety based on the wind-traffic-pavement-bridge coupled vibration

  • Yin, Xinfeng (School of Civil Engineering and Architecture, Changsha University of Science & Technology) ;
  • Liu, Yang (School of Civil Engineering and Architecture, Changsha University of Science & Technology) ;
  • Chen, S.R. (School of Civil Engineering and Architecture, Changsha University of Science & Technology)
  • Received : 2016.09.25
  • Accepted : 2017.01.17
  • Published : 2017.03.25
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Abstract

In the present study, a new assessment simulation of ride safety based on a new wind-traffic-pavement-bridge coupled vibration system is developed considering stochastic characteristics of traffic flow and bridge surface. Compared to existing simulation models, the new assessment simulation focuses on introducing the more realistic three-dimensional vehicle model, stochastic characteristics of traffic, vehicle accident criteria, and bridge surface conditions. A three-dimensional vehicle model with 24 degrees-of-freedoms (DOFs) is presented. A cellular automaton (CA) model and the surface roughness are introduced. The bridge deck pavement is modeled as a boundless Euler-Bernoulli beam supported on the Kelvin model. The wind-traffic-pavement-bridge coupled equations are established by combining the equations of both the vehicles in traffic, pavement, and bridge using the displacement and interaction force relationship at the patch contact. The numerical simulation shows that the proposed method can simulate rationally useful assessment and prevention information for traffic, and define appropriate safe driving speed limits for vulnerable vehicles under normal traffic and bridge surface conditions.

Keywords

Acknowledgement

Supported by : Natural Science Foundation China, Fund of Hunan Provincial Youth Talent

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