Seismic Performance of Bridge Pile Foundation Considering Effects of Material Freeze-Thaw Deterioration and Permafrost Degradation

ZHANG Xiyin, School of Civil Engineering , Lanzhou Jiaotong University , Lanzhou , Gansu 730070 , ChinaFollow
YU Shengsheng, School of Civil Engineering , Lanzhou Jiaotong University , Lanzhou , Gansu 730070 , China
WANG Wanping, School of Civil Engineering , Lanzhou Jiaotong University , Lanzhou , Gansu 730070 , China
WEN Hairong, School of Civil Engineering , Lanzhou Jiaotong University , Lanzhou , Gansu 730070 , China

Abstract

In cold and high-seismic regions,such as the Qinghai‒Xizang Plateau in China,the deterioration of material properties caused by freeze-thaw cycles and permafrost degradation due to climate change have become increasingly severe,posing significant challenges for the seismic performance assessment of bridge pile foundations.To systematically investigate the impact of permafrost degradation and material freeze-thaw deterioration on the seismic performance of bridge pile foundations and ensure proper seismic design,a finite element model was established,considering the dual effects of permafrost degradation and material freeze-thaw deterioration.A comparative analysis was conducted to evaluate the influence mechanisms of various factors on the seismic performance of bridge pile foundations in permafrost regions.The results indicate that as the bridge service life increases,the horizontal bearing capacity,equivalent stiffness,and energy dissipation capacity of the pile-permafrost system all show a decreasing trend.Notably,the combined effect of permafrost degradation and material freeze-thaw deterioration has a more significant impact on the seismic performance of the bridge pile foundation.Specifically,after 100 years of bridge service,the horizontal bearing capacity of the pile-permafrost system reduces to approximately 55% of its initial value,whereas when only permafrost degradation is considered,the horizontal bearing capacity drops to around 89% of its initial value.Therefore,neglecting the effect of material freeze-thaw deterioration will lead to an unsafe seismic performance assessment of the bridge pile foundation.In the seismic performance analysis of bridge pile foundations in permafrost regions,it is essential to consider not only the effect of p ermafrost degradation but also the impact of material freeze-thaw deterioration.

Publication Date

2-22-2025

DOI

10.14048/j.issn.1671-2579.2025.01.003

First Page

Last Page

Submission Date

March 2025

Recommended Citation

Xiyin, ZHANG; Shengsheng, YU; Wanping, WANG; and Hairong, WEN (2025) "Seismic Performance of Bridge Pile Foundation Considering Effects of Material Freeze-Thaw Deterioration and Permafrost Degradation," Journal of China & Foreign Highway: Vol. 45: Iss. 1, Article 3.
DOI: 10.14048/j.issn.1671-2579.2025.01.003
Available at: https://zwgl1980.csust.edu.cn/journal/vol45/iss1/3

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