Loading...
Influence of apparent wave velocity on seismic performance of a super-long-span triple-tower suspension bridge
Wang, Hao Li, Jian Tao, Tianyou Wang, Chunfeng Li, Aiqun
Wang, Hao
Li, Jian
Tao, Tianyou
Wang, Chunfeng
Li, Aiqun
Citations
Altmetric:
Abstract
As one of the main characteristics of seismic waves, apparent wave velocity has great influence on seismic responses of long-span suspension bridges. Understanding these influences is important for seismic design. In this article, the critical issues concerning the traveling wave effect analysis are first reviewed. Taizhou Bridge, the longest triple-tower suspension bridge in the world, is then taken as an example for this investigation. A three-dimensional finite element model of the bridge is established in ABAQUS, and the LANCZOS eigenvalue solver is employed to calculate the structural dynamic characteristics. Traveling wave effect on seismic responses of these long-span triple-tower suspension bridges is investigated. Envelopes of seismic shear force and moment in the longitudinal direction along the three towers, relative displacements between the towers and the girder, and reaction forces at the bottoms of the three towers under different apparent wave velocities are calculated and presented in detail. The results show that the effect of apparent wave velocity on the seismic responses of triple-tower suspension bridge fluctuates when the velocity is lower than 2000 m/s, and the effects turn stable when the velocity becomes larger. In addition, the effects of traveling wave are closely related to spectral characteristics and propagation direction of the seismic wave, and seismic responses of components closer to the source are relatively larger. Therefore, reliable estimation of the seismic input and apparent wave velocity according to the characteristics of the bridge site are significant for accurate prediction of seismic responses. This study provides critical reference for seismic analysis and design of long-span triple-tower suspension bridges.
Description
Date
2015-06-25
Journal Title
Journal ISSN
Volume Title
Publisher
SAGE Publications
Files
Loading...
Li_2015.pdf
Adobe PDF, 4.05 MB
Research Projects
Organizational Units
Journal Issue
Keywords
Apparent wave velocity, seismic performance, triple-tower suspension bridges, non-uniform ground motion, propagation direction
Citation
Wang, H., Li, J., Tao, T., Wang, C., & Li, A. (2015). Influence of apparent wave velocity on seismic performance of a super-long-span triple-tower suspension bridge. Advances in Mechanical Engineering, 7(6), 1687814015589464.