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Wind and Structures Volume 24, Number 3, March 2017 , pages 287-306 DOI: https://doi.org/10.12989/was.2017.24.3.287 |
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Assessment of ride safety based on the wind-traffic-pavement-bridge coupled vibration |
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Yin Xinfeng, Liu Yang and Chen S.R.
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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. | ||
| Key Words | ||
| bridge; traffic; vibration; ride safety; bridge surface | ||
| Address | ||
| Yin Xinfeng, Liu Yang and Chen S.R.: School of Civil Engineering and Architecture, Changsha University of Science & Technology, Changsha 410004, Hunan, China Chen S.R.: Department of Civil and Environmental Engineering, Colorado State University, Fort Collins, CO 80525, USA | ||