Effects of quasi-static deformation of a simply supported high speed railway box girder bridge on dynamic responses of vehicle-bridge coupled system

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (5) : 209-215.

ZHOU Shuang1，ZHANG Nan1，XIA He1，ZHANG Yunshi1，CAI Chaoxun2

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Abstract

Effects of quasi-static bridge deformation on track irregularities during high speed train operation and the caused running safety problem were studied here. Firstly, the vehicle-bridge coupled system’s dynamic interaction model was established and used to study effects of quasi-static bridge deformation on track irregularities. Then track irregularities were taken as the external excitation to analyze effects of quasi-static deformation of a simple-supported high speed railway box girder bridge under the action of multi-factor on dynamic responses of the vehicle-bridge system. The analysis results showed that effects of the bridge beam’s quasi-static deformation on the bridge’s dynamic response is very small; the beam’s upward slowly bending affects vehicle vertical dynamic response obviously, and the beam’s temperature induced lateral bending and pier-top lateral displacement affect vehicle lateral dynamic response obviously; when amplitudes of the beam’s upward slowly bending and temperature induced lateral bending reach 20 mm and the amplitude of pier-top lateral displacement reaches 50 mm, dynamic parameters of the bridge and the vehicle are all in the train running safe

Key words

quasi-static deformation / running safety / Inter-history iteration / track irregularity / coupled vehicle-bridge system

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ZHOU Shuang1，ZHANG Nan1，XIA He1，ZHANG Yunshi1，CAI Chaoxun2. Effects of quasi-static deformation of a simply supported high speed railway box girder bridge on dynamic responses of vehicle-bridge coupled system[J]. Journal of Vibration and Shock, 2019, 38(5): 209-215

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