锚贴钢板加固RC锈蚀梁承载力计算方法与试验研究  

CACULATION METHOD AND EXPERIMENTAL STUDY ON CORRODED RC BEAMS STRENTHENED BY STEEL PLANT ANCHORED WITH STUD

作　　者：张建仁[1] 唐皇[1] 彭建新[1] 李炬[1] 

机构地区：[1]长沙理工大学土木与建筑学院,湖南长沙410114

出　　处：《工程力学》2015年第3期97-103,共7页Engineering Mechanics

基　　金：国家重点基础研究发展计划项目(2015CB057706);国家自然科学基金项目(51178060);交通运输部主干学科应用基础研究项目(2014319825160);中国博士后科学基金项目(2014M552127);2014长沙理工大学科技创新校重点项目(CX2014ZD01);长沙理工大学桥梁工程湖南省高校重点实验室开放基金项目(13KA04)

摘　　要：基于桁架理论模型,定量考虑锈蚀钢筋力学性能、加固钢板厚度、粘胶层粘结强度、保护层厚度对承载力的影响,建立了RC梁锈蚀锚贴加固后极限承载力的计算公式。通过对9片锚贴钢板加固锈蚀梁、3片锈蚀梁以及3片不锈蚀加固梁的试验研究,验证了理论模型的正确性。试验研究和公式计算表明在锈蚀率接近和保护层厚度相同的情况下,钢板厚度每提高1mm,承载力大小提高15k N^20k N,在锈蚀率大小不同的情况下,锈蚀率增加2%~3%,承载力降低大约10k N。Based on the model of truss theory, taking the influence of the mechanical behavior of corroded reinforcements, the thickness of a steel plate, the bond strength, and the thickness of a cover on the capacity of beams into accounts quantitatively, a calculation method for the ultimate load-carrying capacity of corroded RC beams strengthened by steel plates anchored with studs is proposed. The theory model is verified by conducting tests on 9 RC beams strengthened by steel plates anchored with studs, and by 3 corroded RC beams and 3 strengthened RC beams without corroded reinforcements. Experimental results and theoretical results show that a 1mm increase in the thickness of a steel plate will result in 15 k N^20k N increase in bearing capacity under same cover thickness and a close corrosion rate, and under the situation of different corrosion rates, an increase in the corrosion rate of 2%~3% of results will cause a decrease in bearing capacity about 10 k N.

关 键 词：RC梁 锈蚀 锚贴钢板加固 承载力 计算方法 试验研究 

分 类 号：TU375.1[建筑科学—结构工程]