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Nonlinear dynamic analysis of long-span cable-stayed bridges with train–bridge and cable coupling

Authors
  • Zhu, Zhihui1
  • Wang, Lidong1
  • Davidson, Michael T.2
  • Harik, Issam E.3
  • Patil, Anand4
  • 1 Central South University, School of Civil Engineering, Changsha, Hunan Province, 410075, China , Changsha (China)
  • 2 University of Florida, Bridge Software Institute, Engineering School of Sustainable Infrastructure and Environment, Gainesville, FL, 32605-0281, USA , Gainesville (United States)
  • 3 University of Kentucky, Department of Civil Engineering, Lexington, KY, 40506-0281, USA , Lexington (United States)
  • 4 University of Florida, Engineering School of Sustainable Infrastructure and Environment, Gainesville, FL, 32605-0281, USA , Gainesville (United States)
Type
Published Article
Journal
International Journal of Advanced Structural Engineering
Publisher
Springer Berlin Heidelberg
Publication Date
May 24, 2019
Volume
11
Issue
2
Pages
271–283
Identifiers
DOI: 10.1007/s40091-019-0229-1
Source
Springer Nature
Keywords
License
Green

Abstract

Span lengths of newly constructed cable-stayed railway bridges continue to show increases relative to those of older bridges. Accompanying such increases is the importance of ensuring that vibrations of long-span cable-stayed bridges satisfy both safety and serviceability requirements, particularly for bridges that support train passages. In contrast to modern design of bridges that support roadway vehicles, current methods for analyzing cable-stayed railway bridges do not yet typically account for coupling effects that may occur between cables and the surrounding bridge structure during train passages. This paper presents a computational framework for the nonlinear dynamic analysis of railway bridges based on a coupled train–bridge analytical model and investigates the significance of accounting for cable-related coupling effects. A case study is then carried out, where coupled dynamic responses of cables, towers, and girders of an in-service railway bridge are computed and compared to those obtained using an uncoupled approach. These comparisons demonstrate the merits of accounting for coupling phenomena when computing dynamic characteristics of cable-stayed railway bridges and highlight benefits of the coupled analysis approach in bridge design applications.

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