碳纤维布复合加固钢筋混凝土梁施工工艺及抗弯性能试验研究

褚云朋; 姚勇; 邓勇军; 夏晓宁; 陈代果

doi:10.13204/j.gyjz201204016

碳纤维布复合加固钢筋混凝土梁施工工艺及抗弯性能试验研究

doi: 10.13204/j.gyjz201204016

1.
西南科技大学土木工程与建筑学院四川绵阳 621010

基金项目:

国家发展计划(863)项目(2009AA032304);西南科技大学青年基金项目(11zx3128)

详细信息

作者简介:
褚云朋，男，1979年出生，讲师。

中图分类号: TU375.1
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- 被引次数: 1
出版历程
- 收稿日期: 2011-12-20
- 刊出日期: 2012-04-20

EXPERIMENTAL STUDY ON CONSTRUCTION PROCESS AND BENDING CAPACITY OF DAMAGED RC BEAM STRENGTHENED BY COMPOSITE CFRP SHEETS

1.
Collage of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621010,China

摘要

摘要: 对在汶川地震的震损建筑中拆下的强度等级约C13的钢筋混凝土梁,加载到相同损伤程度后,进行8种加固方法 22个钢筋混凝土梁单调加载试验,探讨梁的极限承载力、破坏模式、裂缝开展和应变变化等力学性能。结果表明:1)采用剔槽植入钢筋置换混凝土灌胶再粘贴碳纤维布(CFRP)的复合加固方案,加固梁的开裂荷载、极限承载力与直接粘贴CFRP布比有显著提高。2)剔槽植筋复合加固方案中的CFRP布上的应变值比简单粘贴CFRP布后应变值增大更多,新旧混凝土间协同工作性强,可以很好地发挥CFRP布高强作用。3)采用复合工艺加固的梁,如适当提高碳纤维布的用量,可以进一步改善钢筋的受力状态,有效地提高梁的开裂荷载和极限荷载。
- 损伤RC梁 /
- CFRP布加固 /
- 抗弯承载力 /
- 延性 /
- 破坏模式
Abstract: The experimental study on flexural capacity of strengthened RC beams about C13,which were detached from the damaged building of Wenchuan earthquake was carried out,then loading to the same damage. There were 22 RC test beams adopting 8 kinds of strengthened methods by composite CFRP sheets under monotonic loading,it was investigated strength,stiffness,ductility,crack and strain changes of the beams. Results showed that: 1) The ultimate bearing capacity of reinforcement compound solutions of automatic glue pouring,replacement concrete after picked slot,implanting steels and pasting CFRP was much higher than direct pasting CFRP; cracking load and ductility was improved evidently. 2) The maximum stress of CFRP on which reinforcement compound solutions was bigger than direct pasting,the high-strength effect of CFRP was used very well,interoperability between new and old concrete was strong,which could play a good role in high-strength CFRP. 3) For the beam strengthened with the compound technology,raising the amount of CFRP could further improve the stress of steel, and effectively improve the cracking load and limit load of beam.
- damaged RC beam /
- CFRP sheets strengthening /
- bending capacity /
- ductility /
- failure mode

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参考文献(10)

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