锈蚀箍筋约束混凝土应力-应变本构关系模型  

Stress-Strain Constitutive Relation Model of Corroded Stirrups Confined Concrete

作　　者：刘磊 牛荻涛[2] 李强[3] 何真[1] LIU Lei;NIU Ditao;LI Qiang;HE Zhen(State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China;College of Civil Engineering,Xi an University of Architecture and Technology,Xi an 710055,China;School of Architecture and Civil Engineering,Xi an University of Science and Technology,Xi an 710055,China)

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072 [2]西安建筑科技大学土木工程学院,陕西西安710055 [3]西安科技大学建筑与土木工程学院,陕西西安710055

出　　处：《建筑材料学报》2018年第5期811-816,共6页Journal of Building Materials

基　　金：国家重点基础研究发展计划(973计划)项目(2015CB655101);国家杰出青年科学基金资助项目(50725824);国家自然科学基金资助项目(51278403);教育部创新团队发展计划项目(IRT13089)

摘　　要：为探讨箍筋锈蚀对混凝土约束性能的影响,通过外加直流电对钢筋混凝土棱柱体中的箍筋进行加速锈蚀,得到了不同箍筋锈蚀率试件,并对试件进行了轴心受压试验.结果表明:随着箍筋锈蚀率的增加,约束混凝土试件的承载力、刚度和延性均有不同程度的降低.基于现有研究成果,建立了轴心受压下锈蚀箍筋约束混凝土应力-应变本构关系模型,通过与实测的锈蚀箍筋约束混凝土应力-应变全曲线对比,证实该模型拟合曲线与实测曲线吻合较好.In order to study the influence of the corrosion of stirrups on the confined concrete performance,stirrups in concrete specimens were subjected to an accelerated galvanic corrosion process.The uniaxial compressive properties of reinforced concrete with different corrosion rate of stirrups were investigated.Testing results show that bearing capacity,stiffness and ductility of the confined concrete are reduced in different degrees,with the increase of the corrosion rate of stirrups;the stress-strain constitutive relation model under uniaxial compression is proposed based on the existing research results,which is in good agreement with the measured curve.

关 键 词：锈蚀箍筋 约束混凝土柱 轴心受压 应力应变全曲线 

分 类 号：TU528.01[建筑科学—建筑技术科学]