摘要
为研究点蚀效应对锈蚀箍筋约束混凝土应力-应变的影响,基于已有研究成果,通过分析钢筋表面点蚀坑的深度及其随锈蚀时间的分布概率,得到考虑均匀锈蚀与点蚀耦合影响的锈蚀钢筋时变损伤模型;并通过分析点蚀对锈蚀箍筋约束混凝土的影响,进一步对已有约束混凝土应力-应变模型进行修正,最终建立考虑点蚀效应的锈蚀箍筋约束混凝土时变应力-应变模型;将数值模拟结果与试验结果进行对比分析,验证模型的可靠性。分析结果表明:该模型可较好地反映锈蚀箍筋约束混凝土力学性能的变化,为氯离子侵蚀作用下钢筋混凝土结构精细化数值分析提供参考。
In order to study the influence of pitting corrosion on the stress-strain of concrete confined by stirrups,based on the existing research results,the time-varying damage model of corroded reinforcement with uniform corrosion and pitting corrosion was obtained through analyzing the change rule of pitting depth and probability distribution with corrosion time.Then,the existing confined concrete stress-strain model was modified by analyzing the influence of pitting corrosion on confined concrete with corroded stirrups.Finally,a time-varying stress-strain model of concrete confined by strirrups considering the effect of pitting corrosion was constructed,and the reliability of the model was verified by comparing the calculated results with the experimental results.The results showed that the proposed model could better reflect the change of mechanical properties of concrete with corroded stirrup and provide reference to elaborate numerical analysis of reinforced concrete structure in chloride ion erosion.
作者
王斌
冯博强
孙勇峰
杨倩
王家滨
WANG Bin;FENG Boqiang;SUN Yongfeng;YANG Qian;WANG Jiabin(School of Civil and Architecture Engineering,Xi’an Technological University,Xi’an 710021,China;State Key Laboratory of Green Building in Western China,Xi’an University of Architecture&Technology,Xi’an 710055,China)
出处
《工业建筑》
CSCD
北大核心
2021年第9期106-112,155,共8页
Industrial Construction
基金
国家自然科学基金项目(51908440,51678475)
西部绿色建筑国家重点实验室开放基金项目(LSKF202118)
陕西省科技厅科研计划项目(2021JM-426)。
关键词
锈蚀箍筋
点蚀
损伤模型
时变应力-应变模型
约束混凝土
corroded stirrup
pitting corrosion
damage model
time-varying stress-strain model
confined concrete
