| 锚贴钢板加固RC锈蚀梁承载力计算方法与试验研究 |
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| 引用本文： | 张建仁,唐皇,彭建新,李炬.锚贴钢板加固RC锈蚀梁承载力计算方法与试验研究[J].工程力学,2015,32(3):97-103. |
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| 作者姓名： | 张建仁 唐皇 彭建新 李炬 |
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| 作者单位： | 长沙理工大学土木与建筑学院,湖南,长沙 410114 |
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| 基金项目： | 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) |
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| 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15kN~20kN,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10kN。
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| 关 键 词： | RC梁 锈蚀 锚贴钢板加固 承载力 计算方法 试验研究 |
| 收稿时间： | 2013-09-16 |
CACULATION METHOD AND EXPERIMENTAL STUDY ON CORRODED RC BEAMS STRENTHENED BY STEEL PLANT ANCHORED WITH STUD |
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| Affiliation: | School of Civil Engineering and Architecture, Changsha University of Science & Technology, Changsha, Hunan 410114, China |
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| Abstract: | 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 15kN~20kN 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 10kN. |
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