Influencing factors of Impact Coefficient for Long-span Railway Cable-stayed Bridge
LI Yong-le1,BAO Yu-long1,DONG Shi-fu1,2,ZENG Yong-ping3,XIANG Huo-yue1
1.Department of Bridge Engineering,Southwest Jiaotong University,Chengdu 610031,China;
2.Hubei Provincial Communication Planning and Design Institute, Wuhan 430051,China;
3.China Railway Eryuan Engineering Group Co., Ltd.,Chengdu 610031,China
Abstract:In order to investigate the effect of some factors including train formation on impact coefficient of long-span railway cable-stayed bridge, according to the vehicle-induced vibration characteristics of long-span railway cable-stayed bridge, the method of vehicle-bridge coupling vibration is adopt to explore the impact effects to local elements of bridge under different train’s operational conditions. Based on the self-developed software BANSYS, the dynamic responses of the long-span railway cable-stayed bridge are calculated, and the effect of train formation, track irregularities, advancing directions and types of trains on the impact characteristics of each part of cable-stayed bridge are discussed. The results show that the same or similar train formation should be adopted when conducting vehicle-bridge dynamic calculation or field dynamic experiments; there are obvious differences among the impact coefficients at the same position when the driving direction of train is opposite.
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