Dynamic Analysis of Highway Bridges by 3-D. Vehicle Model Considering Tire Enveloping

타이어 접지폭을 고려한 3차원 차량모델에 의한 도로교의 동적해석

  • 정태주 (한라대학교 토목공학과)
  • Received : 2006.05.11
  • Accepted : 2006.10.06
  • Published : 2006.11.29

Abstract

In this paper, numerical analysis method to perform linear dynamic analysis of bridge considering the road surface roughness and bridge-vehicle interaction when vehicle is moving on bridge is presented. The vehicle and bridge are modeled as three-dimension where contact length of tire and pitching of tandem spring are considered and single truck with 2-axles and 3- axles, and tractor-trailer with 5-axles are modeled as 7-D.O.F., 8-D.O.F., and 14-D.O.F., respectively. Dynamic equations of vehicle are derived from the Lagrange's equation and solution of the equation is obtained by Newmark-${\beta}$ method. The surface roughness of bridge deck for this analysis is generated from power spectral density (PSD) function. Beam element for the main girder, shell element for concrete deck and rigid link between main girder and concrete deck are used. The equations of the motion of bridges are solved by mode-superposition procedures. The proposed procedure is validated by comparing the results with the experimental data by Whittemore and Fenves.

Acknowledgement

Supported by : 건설교통부

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