Experimental study and analytical model of the bond behavior of corroded reinforcing steel bars in concrete

被引：35
作者：
Zheng, Yue [1 ,2 ]
Zheng, Shan-Suo [1 ,2 ]
Yang, Lu [1 ,2 ]
Dong, Li-Guo [1 ,2 ]
Zhang, Yi-Bo [1 ,2 ]
机构：
[1] Xian Univ Architecture & Technol, Sch Civil Engn, Xian 710055, Peoples R China
[2] Minist Educ XAUAT, Key Lab Struct Engn & Earthquake Resistance, Xian 710055, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2022年 / 327卷
基金：
国家重点研发计划;
关键词：
Reinforced concrete; Bond performance; Corrosion; Stirrups; Bond-slip relationship; Finite element simulation; SLIP BEHAVIOR; DEFORMED BARS; LOCAL BOND; CORROSION; STRENGTH; DEGRADATION; PERFORMANCE;
D O I：
10.1016/j.conbuildmat.2022.126991
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The corrosion of longitudinal rebar and stirrups will cause serious degradation of the bond performance between steel bars and concrete. To investigate the impact of both longitudinal rebar and stirrup corrosion on the bond behavior, 35 reinforced concrete (RC) pull-out specimens were subjected to accelerated corrosion tests with electroosmosis/constant current/dry-wet cycling and pull-out tests. The influence laws of the degree of corrosion of the longitudinal reinforcement, degree of corrosion of the stirrups, cover thickness, stirrup spacing and longitudinal reinforcement diameter on the bond performance were also investigated. The bond behavior between corroded steel bars and concrete was analyzed from the aspects of corrosion form, failure mode and bond strength. Subsequently, based on the experimental data, a modified bond-slip constitutive model that considers the design parameters, stirrup corrosion and longitudinal rebar corrosion was built and verified. The modified bond-slip constitutive model was applied to the cohesive element to establish a finite element model of the corroded pull-out specimens, and additional parameters were analyzed.
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页数：16
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