Page 262 - 《振动工程学报》2025年第9期

第 38 卷第 9 期 振 动 工 程 学 报 Vol. 38 No. 9
2025 年 9 月 Journal of Vibration Engineering Sept. 2025

氯 离 子 侵 蚀 作 用 下 的 典 型 钢 筋 混 凝 土 梁 桥

时 变 抗 震 性 能 分 析

尹康帅 ， 冯克岩 ， 李建中 1
1
2
（1. 同济大学土木工程防灾减灾全国重点实验室，上海 200092； 2. 天津市政工程设计研究总院有限公司，天津 300392）

摘要：为研究氯离子侵蚀作用下钢筋混凝土 (reinforced concrete, RC) 梁桥抗震性能的退化规律，基于 Duracrete 模型和现有材
料劣化的研究成果，确定了纵筋、箍筋、保护层混凝土和核心混凝土力学性能的时变劣化模型；以一座三跨 RC 连续梁桥为
例，采用 OpenSees 建立了不同服役时间下的梁桥分析模型，比较不考虑钢筋极限拉应变劣化和采用 3 种不同的劣化关系模型
考虑钢筋极限拉应变劣化的情况，分析了氯离子侵蚀作用对梁桥结构抗震能力和地震需求的影响。分析结果表明：在氯离子
侵蚀作用下，钢筋极限拉应变的劣化明显比钢筋屈服强度的劣化更为严重；考虑钢筋极限拉应变劣化时，桥墩截面的极限曲
率退化更加显著，同时曲率地震需求明显增加，从而导致墩柱曲率能力与需求比进一步减小，梁桥结构的抗震性能受到变形
能力劣化的显著影响，因此若不考虑钢筋极限拉应变劣化，会使得对梁桥结构全寿命周期内抗震性能的评价结果偏于不安
全；此外，3 种劣化关系模型的适用性各不相同，墩柱曲率能力与需求比的退化程度也存在较大的差异，需要根据研究应用的
场景进行选择。
关键词： 桥梁工程；抗震性能分析；非线性时程分析；材料劣化；氯离子侵蚀
+
中图分类号：U442.5 5 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202309059

Time-dependent seismic performance analysis of typical reinforced concrete girder

bridge under chloride-induced corrosion

1
2
YIN Kangshuai ，FENG Keyan ，LI Jianzhong 1
（1.State Key Laboratory of Disaster Reduction in Civil Engineering，Tongji University，Shanghai 200092，China；
2.Tianjin Municipal Engineering Design & Research Institute Co.，Ltd.，Tianjin 300392，China）

Abstract：This study aims to investigate the life-cycle seismic performance degradation behaviour of reinforced concrete (RC) girder bridges
under chloride-induced corrosion. Based on the Duracrete model and existing research results，the time-dependent deterioration models for the
mechanical properties of longitudinal reinforcement，transverse reinforcement，cover concrete，and core concrete are determined. A three-
span RC continuous girder bridge is taken as an example，and its nonlinear analysis models corresponding to different characteristic time points
are established by the OpenSees platform. Four analysis cases are investigated to study the effects of chloride-induced corrosion on the girder
bridge's seismic capacity and seismic demand. Among these cases， one involves the omission of considering the deterioration of ultimate
tensile strain of reinforcing steel，while the remaining three consider this deterioration using three diverse degradation models. The results
show that：in the presence of chloride-induced corrosion，the degradation of the ultimate tensile strain of reinforcing steel manifests markedly
more severe than the deterioration observed in its yield strength；the girder bridge suffers a more significant decrease in ultimate curvature，a
greater increase in curvature demand，and a lower curvature demand-to-capacity ratio of pier when considering the deterioration of ultimate
tensile strain of reinforcing steel；disregarding the degradation of the ultimate tensile strain of reinforcing steel would render the life-cycle
seismic performance evaluation results of girder bridge structures unreliable and unsafe； additionally， the applicability of these three
deterioration models varies，and there are significant differences in the degree of degradation of curvature demand-to-capacity ratio among
these models. Therefore，the choice among these three models should be grounded in the research application scenario. As a result，it is
necessary to consider the deterioration characteristics of the ultimate tensile strain of reinforcing steel in the time-dependent seismic
performance evaluation of RC girder bridges.
Keywords：bridge engineering；seismic performance analysis；nonlinear time history analysis；material deterioration；chloride ion corrosion

收稿日期：2023-09-19；修订日期：2023-12-03
基金项目：天津市交通运输科技发展计划资助项目（2021-01）