Dynamic effect of heavy-haul train on seismic response of railway cable-stayed bridge

来源期刊:中南大学学报(英文版)2020年第7期

论文作者:王琨 朱志辉 龚威 刘宇 DAVIDSON Michael T 蒋丽忠

文章页码:1939 - 1955

Key words:train-bridge interaction; heavy-haul train; cable-stayed bridge; earthquake; live load

Abstract: This paper focuses on understanding and evaluating the dynamic effect of the heavy-haul train system on the seismic performance of a long-span railway bridge. A systematic study on the effect of heavy-haul trains on bridge seismic response has been conducted, considering the influence of vehicle modeling strategies and dynamic characteristics of the seismic waves. For this purpose, the performance of a long-span cable-stayed railway bridge is assessed with stationary trains atop it, where the heavy-haul vehicles are modeled in two different ways: the multi-rigid body model with suspension system and additional mass model. Comparison of the bridge response in the presence or absence of the train system has been conducted, and the vehicle loading situation, which includes full-load and no-load, is also discussed. The result shows that during the earthquake, the peak moment of the main girder and peak stress of stay cables increase by 80% and by 40% in the presence of fully loaded heavy-haul trains, respectively. At the same time, a considerable decrease appears in the peak acceleration of the main girder. This proves the existence of the damping effect of the heavy-haul train system, and this effect is more obvious for the fully loaded vehicles. Finally, this paper proposes an efficient vehicle modeling method with 2 degrees of freedom (DOF) for simplifying the treatment of the train system in bridge seismic checking.

Cite this article as: ZHU Zhi-hui, GONG Wei, WANG Kun, LIU Yu, DAVIDSON Michael T, JIANG Li-zhong. Dynamic effect of heavy-haul train on seismic response of railway cable-stayed bridge [J]. Journal of Central South University, 2020, 27(7): 1939-1955. DOI: https://doi.org/10.1007/s11771-020-4421-z.

有色金属在线官网  |   会议  |   在线投稿  |   购买纸书  |   科技图书馆

中南大学出版社 技术支持 版权声明   电话:0731-88830515 88830516   传真:0731-88710482   Email:administrator@cnnmol.com

互联网出版许可证:(署)网出证(京)字第342号   京ICP备17050991号-6      京公网安备11010802042557号