钢筋
材料科学
腐蚀
极限抗拉强度
复合材料
断裂(地质)
结构工程
预制混凝土
失效模式及影响分析
变形(气象学)
工程类
作者
Wenting Yuan,Yuren Wang,Zhaoxing Dong,Qinghe Fang
标识
DOI:10.1016/j.conbuildmat.2023.134797
摘要
Grouted sleeve splices are widely used in precast-concrete (PC) structures. Although extensive tensile tests have been conducted on grouted sleeves, the force mechanism and changing rules of grouted sleeve connections as influenced by environmental corrosion have rarely been investigated. Accelerated corrosion and monotonic tensile tests were conducted on twenty-five grouted sleeves. The investigated variables of the sleeve splices were the degree of corrosion, rebar eccentricity, and geometrical sizes of the rebar and sleeve. Based on the test results, the three-dimensional corrosion characteristics of the sleeve were analyzed, and the influences of the corrosion distribution, rebar eccentricity, and sleeve size on the failure mode, force–displacement curve, and strain distribution of the sleeves were discussed. The results indicated that the surface roughness parameters Sz, Sa, and Sq of the sleeve increased with an increase in corrosion. As a result of sleeve corrosion, the failure mode of the grouted sleeve connection changed from rebar fracture to sleeve fracture, accompanied by an increase in the longitudinal and circumferential strains of the sleeve, and reductions in strength, deformation capacity, and energy dissipation ability. In addition, the rebar eccentricity led to an uneven strain distribution in the circumferential direction.
科研通智能强力驱动
Strongly Powered by AbleSci AI