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Dynamic Response Analysis of Long-Span Continuous Bridge Considering the Effect of Train Speeds and Earthquakes

Xin-Jun Gao

School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China

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Peng-Hui Duan

School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China

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, and

Hui Qian

School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China

E-mail Address: qianhui@zzu.edu.cn

Corresponding author.

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https://doi.org/10.1142/S0219455420400131Cited by:19 (Source: Crossref)

This article is part of the issue:

Special Issue: Control, Monitoring and Application of Structural Protection Methods against Extreme Dynamic Loading
Guest Editors: Chunwei Zhang and Li Sun

Abstract

In this paper, the dynamic response analysis of long-span continuous bridge under earthquake and train load was simultaneously performed. In order to clearly reveal the mechanism of vibration coupling between vehicles and highway long-span continuous bridge, a numerical model including soil foundation, vehicle and bridge under inclined seismic wave was established utilizing finite element software. The dynamic response of the bridge with different wave incident angles and different train speeds was numerically analyzed. The results show that the wave incident angles have a significant effect on the dynamic response of the bridge, and with the increasing of the wave incident angle, the vertical displacement and velocity as well as the acceleration of mid-span constantly increase. While the dynamic response of the bridge does not increase always with the increasing of train speed, however, at a certain train speed, the dynamic response will reach the maximum. With the increasing of the train speed, the vertical displacements of mid-span points increase while the moments at mid-span reduce significantly when the soil–structure dynamic interaction was considered. The results can provide significant references to ensure the train safe running on the bridges under the earthquake.

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