Numerical Simulation on Seismic Performance Deterioration of Rein- forced Concrete Columns Subjected to Chloride and Sulfate Attack

Xu Chengyu

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Numerical Simulation on Seismic Performance Deterioration of Rein- forced Concrete Columns Subjected to Chloride and Sulfate Attack

更新时间：2025-09-25

- Numerical Simulation on Seismic Performance Deterioration of Rein- forced Concrete Columns Subjected to Chloride and Sulfate Attack
- Issue 2, Pages: 376-384(2021)
- 作者机构：
  
  南京理工大学理学院土木工程系,江苏,南京,210094
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU375.3
- Published：2021
- 稿件说明：
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许骋昱,左晓宝,殷光吉.氯盐⁃硫酸盐环境下钢筋混凝土柱抗震性能退化过程的数值模拟∗[J].防灾减灾工程学报,2021,(2):376-384

Xu Chengyu. Numerical Simulation on Seismic Performance Deterioration of Rein- forced Concrete Columns Subjected to Chloride and Sulfate Attack[J]. 2021, (2): 376-384.
许骋昱,左晓宝,殷光吉.氯盐⁃硫酸盐环境下钢筋混凝土柱抗震性能退化过程的数值模拟∗[J].防灾减灾工程学报,2021,(2):376-384 DOI：

Xu Chengyu. Numerical Simulation on Seismic Performance Deterioration of Rein- forced Concrete Columns Subjected to Chloride and Sulfate Attack[J]. 2021, (2): 376-384. DOI：

摘要

针对氯盐?硫酸盐环境中钢筋混凝土构件抗震性能的劣化问题，利用 Fick 定律、离子浓度与材料损伤的拟合关系，确定了硫酸盐侵蚀下混凝土的损伤本构模型，根据氯盐环境下钢筋锈蚀特征及法拉第定律建立了钢筋截面积损失时变模型，并通过 OpenSees 软件分析了柱构件在侵蚀环境中抗震性能的退化情况。结果表明：随着服役时间的增加，柱的受压、受弯承载力及刚度逐渐退化，构件的延性、滞回耗能能力先增大后减小；服役初期，增大轴向力能够提高构件受弯承载力，但服役超过一定时间后，该作用不明显；整个服役周期内，轴向力的增大都将造成构件弹塑性变形能力降低，故高轴向力作用下，构件的延性、滞回耗能能力均降低。

Abstract

Aiming at seismic behavior of the concrete members in an aggressive environment，models of materials subjected to coupling of chloride and sulfate attack were established. Based on Fick's law and the relationship between ion concentration and deterioration degree of concrete obtained from the experimental data，a constitutive model of the corroded concrete was introduced. Faraday's law and characteristics of the steel bars under chloride attack were combined to determine the area loss of steel bar. With these damage models，the degradation of reinforced concrete columns in aggressive environment was analyzed as an example by numerical simulation with OpenSees. The results show that the bearing capacity and stiffness of the investigated reinforced con-crete columns deteriorate with the increase of service time. For components serving for a comparative short time，they tend to have higher ductility and better performance in resisting low-cycle loading than they do at the beginning of service， which will degrade if they serve for a relatively long period. Axial force plays a significant role in columns' performance to resist lateral loads. To be specific，when columns merely serve for a short period，they will be strengthened with their bearing capacity to resist moment or lateral force if carrying alarger axial load，which will not be observed when columns serve for more than 30 years. But however long service time of the column is，a larger axial load will reduce its capacity to deform and consume energy，which has great influence in seismic performance.

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