期刊
ADVANCES IN MECHANICAL ENGINEERING
卷 14, 期 7, 页码 -出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/16878132221112494
关键词
High-speed railway; suspension bridge; continuous welded rail; seismic response; viscous damper
资金
- National Key R&D Program of China [2017YFB1201204]
- National Natural Science Foundational of China [51608542]
- Fundamental Research Funds for the Central Universities of Central South University [2020zzts643]
This study establishes a nonlinear dynamic simulation model to analyze the seismic response characteristics of a high-speed railway suspension bridge-tracks system under multi-dimensional seismic waves. The effects of design parameters such as initial temperature load mode and viscous damper on the system's response are discussed.
Taking a suspension bridge of (84+84+1092+84+84) m high-speed railway as an example, a nonlinear dynamic simulation model of long-span suspension bridge-tracks system is established. The seismic response characteristics of CWR system of railway suspension bridge under the action of multi-dimensional seismic waves are analyzed. The effects of design parameters such as initial temperature load mode and viscous damper on the seismic response of the system are discussed. Calculation results showed that the longitudinal seismic excitation has great influence on the steel rail stress on the adjacent bridges on both sides and the longitudinal shear force at the pier bottom, and the transverse seismic excitation has great influence on the steel rail stress on the main truss of the suspension bridge, the vertical seismic excitation has a great influence on the internal forces of the main cable and sling; the initial temperature load has a significant influence on the internal forces of the main cable and sling; by reasonably setting the damping coefficient and speed index of the viscous damper, it can effectively reduce the displacement at the end of the main tower pier beam and the bending moment at the bottom of the pier.
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