Train-induced dynamic behavior analysis of longitudinal girder in cable-stayed bridge

Dong-Hui Yang, Ting-Hua Yi, Hong-Nan Li, Hua Liu and Tiejun Liu

Abstract

The dynamic behaviors of the bridge structures have great effects on the comfortability and safety of running high-speed trains, which can also reflect the structural degradation. This paper aims to reveal the characteristics of the dynamic behaviors induced by train loadings for a combined highway and railway bridge. Monitoring-based analysis of the acceleration and dynamic displacement of the bridge girder is carried out. The effects of train loadings on the vertical acceleration of the bridge girder are analyzed; the spatial variability of the train-induced lateral girder displacement is studied; and statistical analysis has been performed for the daily extreme values of the train-induced girder deflections. It is revealed that there are great time and spatial variabilities for the acceleration induced by train loadings for the combined highway and railway cable-stayed bridge. The daily extreme values of the train-induced girder deflections can be well fitted by the general extreme value distribution.

Key Words

railway bridge; structure health monitoring; girder acceleration; dynamic deflection; general extreme value distribution

Address

Dong-Hui Yang: School of Civil Engineering, Dalian University of Technology, Dalian 116023, China Ting-Hua Yi: School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China Hong-Nan Li:School of Civil Engineering, Dalian University of Technology, Dalian 116023, China; School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China Hua Liu: China Railway Major Bridge (Nanjing) Bridge and Tunnel Inspect & Retrofit Co., Ltd., Nanjing 210061, China Tiejun Liu: School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, China

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