Sand Erosion of Steel-Concrete Composite Girder Cable-Stayed Bridge Is Considered Time-Varying Seismic Vulnerability Analysis

DOI

10.2991/978-94-6463-650-5_18How to use a DOI?

Keywords

Steel-concrete composite girder cable-stayed bridge; Erosion by wind and sand; Incremental dynamic analysis procedure; Seismic fragility

Abstract

The main disasters in this research project are sandstorm and frost, and the number of sandstorm days accounts for 63% of the total number of days in the whole year. Therefore, in order to study the influence of wind-sand erosion and seismic action on the seismic performance of concrete cable tower columns of steel-concrete composite girder cable-stayed bridge, the cable tower columns of steel-concrete composite girder cable-stayed bridge consolidated by pier and tower beams of a highway in Qinghai province were taken as the research object. After being eroded by wind-sand for 0, 20, 40, 60, 80 and 100 years, they were divided into 6 working conditions. Based on the IDA analysis method, the reasonable damage index was selected as the damage index of the structure, and the seismic vulnerability analysis of the cable tower column of the steel-concrete composite beam cable-stayed bridge under time-varying earthquake was carried out. The analysis results show that the failure probability along the bridge and across the bridge will increase, but the failure probability along the bridge is much higher than the failure probability along the transverse bridge. After 100 years, when PGA=0.5g, the failure probability along the bridge is 12 times that of the transverse bridge. Therefore, the concrete pylons are not easy to be damaged in the transverse bridge direction.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Fangjun Wang
AU  - Mingbo Ding
AU  - Wei Si
AU  - Jinghua Lu
PY  - 2025
DA  - 2025/01/31
TI  - Sand Erosion of Steel-Concrete Composite Girder Cable-Stayed Bridge Is Considered Time-Varying Seismic Vulnerability Analysis
BT  - Proceedings of the 2024 7th International Conference on Civil Architecture, Hydropower and Engineering Management (CAHEM 2024)
PB  - Atlantis Press
SP  - 174
EP  - 182
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-650-5_18
DO  - 10.2991/978-94-6463-650-5_18
ID  - Wang2025
ER  -