Experimental Study on the Dynamic Deformation of Simply Supported Beam in Chinese High-speed Railway-Reference-Cited by-同舟云学术

Experimental Study on the Dynamic Deformation of Simply Supported Beam in Chinese High-speed Railway

Published:2018 Issue: Volume: Page:
ISSN:2221-3783
Container-title:IABSE Reports
language:
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Author:

Dai Gonglian¹,Wang Meng¹,Zhao Tianliang¹,Liu Wenshuo¹

Affiliation:

1. Central South University, Changsha, Hunan, China

Abstract

<p>At present, Chinese high-speed railway operating mileage has exceeded 20 thousand km, and the proportion of the bridge is nearly 50%. Moreover, high-speed railway design speed is constantly improving. Therefore, controlling the deformation of the bridge structure strictly is particularly important to train speed-up as well as to ensure the smoothness of the line. This paper, based on the field test, shows the vertical and transverse absolute displacements of bridge structure by field collection. What’s more, resonance speed and dynamic coefficient of bridge were studied. The results show that: the horizontal and vertical stiffness of the bridge can meet the requirements of<b>Chinese “high-speed railway design specification” (HRDS)</b>, and the structure design can be optimized. However, the dynamic coefficient may be greater than the specification suggested value. And the simply supported beam with CRTSII ballastless track has second-order vertical resonance velocity 306km/h and third-order transverse resonance velocity 312km/h by test results, which are all coincide with the theoretical resonance velocity.</p>

Publisher

International Association for Bridge and Structural Engineering (IABSE)

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