Seismic Responses of Cable‑Sta yed Bridge Considering Ponding Effect under Near‑Fa ult Ground Motions

Authors

LYU Long, College of Environment and Civil Engineering , Chengdu University of Technology , Chengdu , Sichuan 610059 , China ;State Key Lab of Bridge Engineering Structural Dynamics , China Merchants Chongqing Communications Technology Research & Design Institute Co ., Ltd., Chongqing 400067 , ChinaFollow
YU Deen, China Highway Engineering Consultants Corporation , Beijing 100089 , China
YUAN Yuhang, College of Environment and Civil Engineering , Chengdu University of Technology , Chengdu , Sichuan 610059 , China
YANG Huaiyu, Railway 15th Bureau Grou p 5th Co ., Ltd., Tianjin 300133 , China

Abstract

To study the influence of the pon ding e ffect on seismic responses of the cable-stayed bridge under near-fault ground motions，taking a double-tower cable-stayed bridge as the engineering background，this paper analyzed the ponding response of the main bridge and the main beam of the approach bridge of the cable-stayed bridge under near-fault ground motions and the influence of the ponding response on the structural seismic response.Besides，the influence of viscous dampers and elastic cables on the ponding effect of the cable-stayed bridge under near-fault ground motions was studied，which was compared with the seismic response of the cable-stayed bridge under far-fault ground motions to discuss the influence of the ponding effect on the seismic mitigation rate of the cable-stayed bridge.The results show that compared with non-pulse ground motions，under near-fault pulse-type ground motions， the main bridge and approach bridge of the cable-stayed bridge are more likely to collide within the pulse period，and the influence of the ponding effect on the seismic response of the cable-stayed bridge is more significant.When viscous dampers and elastic cables are installed，the main bridge and approach bridge still collide within the pulse period，but the ponding response decreases.Besides，the influence of the ponding effect on seismic responses of the cable-stayed bridge under pulse-type ground m otions is significantly reduced，and the ponding effect should be considered when the seismic mitigation rate of the cable-stayed bridge under pulse-type ground motion is analyzed.

Publication Date

10-28-2024

DOI

10.14048/j.issn.1671-2579.2024.05.016

First Page

149

Last Page

157

Submission Date

February 2025

Recommended Citation

Long, LYU; Deen, YU; Yuhang, YUAN; and Huaiyu, YANG (2024) "Seismic Responses of Cable‑Sta yed Bridge Considering Ponding Effect under Near‑Fa ult Ground Motions," Journal of China & Foreign Highway: Vol. 44: Iss. 5, Article 16.
DOI: 10.14048/j.issn.1671-2579.2024.05.016
Available at: https://zwgl1980.csust.edu.cn/journal/vol44/iss5/16

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