建筑结构

2011, v.41;No.326(02) 120-123

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CFRP复合加固损伤RC梁抗弯承载力试验
Experiment on flexural capacity of damaged RC beams strengthened by composite CFRP sheets

褚云朋;贾彬;姚勇;王汝恒;
Chu Yunpeng,Jia Bin,Yao Yong,Wang Ruheng(College of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621010,China)

摘要(Abstract):

对在汶川地震中震损建筑物中拆下的强度等级约为C13的RC梁加固后进行抗弯承载力试验研究,根据7组21个试件的三分点加载试验,对梁的承载力、刚度和延性等进行综合评估。结果表明:与直接粘贴CFRP布相比,采用剔槽植入钢筋置换混凝土灌胶再粘贴CFRP布复合加固方案加固的梁极限承载力有显著提高,开裂荷载及延性有较大提高;试验中复合加固方案的CFRP布上的最大应力值比直接粘贴CFRP布的大2~4倍,很好地发挥了CFRP布的高强作用;加载中复合加固方案的CFRP布被拉断,经计算并结合试验结果,加固设计中梁的抗弯承载力提高数值满足相关规范要求,可避免CFRP布的拉断。
The experimental study on flexural capacity of RC beams about C13,which were detached from the damaged building of Wenchuan earthquake and were strengthened,was carried out.Based on the results of three points of division loading test on 21 models which were divided into 7 groups,the bearing capacity,stiffness and ductility were comprehensively evaluated.Results show that ultimate bearing capacity of RC beam strengthened by composite CFRP sheets is much higher than that of direct pasting CFRP.Cracking load and ductility are improved higher too.The maximum stress of CFRP on which reinforcement compound solutions is 2-4 times bigger than that of direct pasting and the high-strength effect of CFRP is used very well.The CFRP of reinforcement compound solutions were ruptured under given ultimate loads,and it would be avoided if the increased value meet interrelated laws by compositing calculation and test results.

关键词(KeyWords): 损伤RC梁;CFRP布加固;抗弯承载力;延性;破坏模式
damaged RC beam;CFRP sheets strengthening;flexural capacity;ductility;failure mode

Abstract:

Keywords:

基金项目(Foundation): 国家“863”高新技术研究与发展计划项目(2009AA032304)

作者(Author): 褚云朋;贾彬;姚勇;王汝恒;
Chu Yunpeng,Jia Bin,Yao Yong,Wang Ruheng(College of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621010,China)

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DOI: 10.19701/j.jzjg.2011.02.029

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