长期停建工程锈蚀钢筋力学性能研究  

STUDY ON MECHANICAL PROPERTIES OF REINFORCEMENT CORROSION IN LONG-TERM CONSTRUCTION SUSPENSION PROJECT

作　　者：杨兴兴 肖珍 YANG Xingxing;XIAO Zhen(Hunan Bolian Testing Group Co.,Ltd.,Hunan Changde 415000,China;Hunan Institute of Traffic Enginering,Hunan Hengyang 421009,China)

机构地区：[1]湖南博联检测集团有限责任公司,湖南常德415000 [2]湖南交通工程学院,湖南衡阳421009

出　　处：《低温建筑技术》2022年第5期15-18,28,共5页Low Temperature Architecture Technology

基　　金：湖南省教育厅科学研究项目“基于荷载试验和计算分析的既有建筑结构安全性鉴定研究”(19C0693);国家级大学生创新创业训练计划项目“基于计算分析和荷载试验法在既有建筑结构安全性鉴定中的应用”(S202013924002)。

摘　　要：钢筋锈蚀对钢筋力学、钢筋与混凝土粘结性能造成不利影响。文中分析了钢筋锈蚀机理,阐述了钢筋锈蚀过程及危害,并通过对长期停工工程中的锈蚀钢筋进行拉伸试验和拉拔试验,试验表明锈蚀钢筋屈服强度和极限抗拉强度随锈蚀率增加而近似线性减小;锈蚀钢筋与混凝土的粘结力在一定范围内(锈蚀率小于3%时)出现了增加,当锈蚀率大于3%时出现了减小。Reinforcement corrosion has adverse effects on the mechanics of reinforcement,and the bond perfor⁃mance between reinforcement and concrete by reinforcement corrosion.In this paper,the mechanism and harm of re⁃inforcement corrosion was analyzed and expounded.The effect of reinforcement corrosion rate on the strength and bonding loss of reinforcement was studied by the tensile and drawing testing of the corroded reinforcement from a long-term suspension project.The yield strength and ultimate tensile strength of corroded reinforcement decreased linearly with the increase of corrosion rate,and the bonding strength between corroded reinforcement and concrete increased within the corrosion rate<3%.As the corrosion rate is more than 3%,the bonding strength decreases.

关 键 词：钢筋锈蚀 拉伸试验 粘结力损失 

分 类 号：TU411.8[建筑科学—岩土工程]