FRP约束高温损伤混凝土柱的轴压性能有限元分析
Finite element analysis of axial compression performance of FRP confined high-temperature damaged concrete columns
关键词：
纤维增强复合材料（FRP）；约束效果；混凝土柱；轴压性能；高温损伤
Key words：
Fiber reinforced polymer (FRP); Constraint effect; Concrete column; Axial compression performance; High-temperature damage
刊期：
2025年第7期
DOI：
10.19761/j.1000-4637.2025.07.066.05
文章编号：
基金项目：
国家自然科学基金项目（51708349、11672185）。
作者：
欧阳利军，奚际宇
单位：
上海理工大学 环境与建筑学院，上海 200093
摘要
摘 要：采用ABAQUS软件建立了纤维增强复合材料（FRP）约束高温损伤混凝土柱的轴压模型，研究了混凝土强度等级、FRP的种类和约束层数、温度对试件轴压性能的影响。结果表明：建立的FRP约束高温损伤混凝土柱轴压模型的准确度较高；随着混凝土强度等级的提高，试件的极限应力增大，极限应变减小；与玄武岩纤维增强复合材料（BFRP）相比， 碳纤维增强复合材料（CFRP）对试件的约束增强效果更好；随着约束层数的增加，FRP对试件的约束效应增强；高温会劣化混凝土的性能，随着温度的增加，试件的极限应力减小。
Abstract: An axial compression model of fiber reinforced polymer (FRP) confined high-temperature damaged concrete columns was established by using ABAQUS software, and the effects of concrete strength grade, type and constraint layer number of FRP, and temperature on the axial compression performance of specimens were studied. The results indicate that the established axial compression model of FRP confined high-temperature damaged concrete column has high accuracy. As the concrete strength grade increases, the ultimate stress of the specimen increases, and the ultimate strain decreases. Compared with basalt fiber reinforced polymer (BFRP), carbon fiber reinforced polymer (CFRP) has a better constraint enhancement effect on the specimen. As the constraint layer number increases, the constraint effect of FRP on the specimen is enhanced. High temperature will deteriorate the performance of concrete, and as the temperature increases, the ultimate stress of the specimen decreases.
结论
（1）本文建立的FRP约束高温损伤混凝土柱轴压模型的准确度较高，可为相关研究和工程应用提供参考。
（2）随着混凝土强度等级的提高，试件的极限应力增大，极限应变减小；与BFRP约束试件相比， CFRP约束试件的极限应力提高较大，而极限应变提高较小；随着约束层数的增加，FRP对高温损伤混凝土柱的约束效应增强；随着温度的增加，试件的极限应力减小。实际应用时，需综合考虑工程要求、材料性价比等因素，选择合适的FRP种类和约束层数。
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引用本文
欧阳利军,奚际宇.FRP约束高温损伤混凝土柱的轴压性能有限元分析[J].混凝土与水泥制品,2025(7):66-70.
OUYANG L J,XI J Y.Finite element analysis of axial compression performance of FRP confined high-temperature damaged concrete columns[J].China Concrete and Cement Products,2025(7):66-70.
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