考虑裂缝分布的外贴复合纤维增强材料加固钢筋混凝土梁变形研究

蔺新艳; 朱小静; 孟海平

doi:10.13204/j.gyjz201308017

考虑裂缝分布的外贴复合纤维增强材料加固钢筋混凝土梁变形研究

doi: 10.13204/j.gyjz201308017

1.
河南理工大学土木工程学院,河南焦作454000

基金项目:

国家自然基金项目(51208183);河南省教育厅自然科学研究项目(2010A560008);河南理工大学博士基金资助项目(B2009-37)

详细信息

作者简介:
第一作者：蔺新艳, 女, 1979年出生, 博士, 讲师。电子信箱：linxinyan79@hpu.edu.cn

中图分类号: TU375.1
计量
- 文章访问数: 144
- HTML全文浏览量: 13
- PDF下载量: 89
- 被引次数: 0
出版历程
- 收稿日期: 2013-03-12
- 刊出日期: 2013-08-20

RESEARCHES ON DEFORMABILITY OF RC BEAMS STRENGTHENED WITH EXTERNAL CFRP SHEETS CONSIDERING THE CRACK DISTRIBUTION

1.
School of Civil Engineering,Henan Polytechnic University,Jiaozuo 454000,China

摘要

摘要: 在建立研究相邻裂缝间局部曲率非线性分析模型的基础上，选取基于黏结-滑移理论的最大裂缝间距2Lb和最小裂缝间距Lb之间部分作为研究对象，对10根外贴复合纤维增强材料加固梁的跨中挠度进行了模拟。模拟结果与实测结果的对比表明，该模型能较好地预测构件的变形性能；裂缝的分布情况对变形虽有一定影响，但并不十分显著，因此，在实用上由弯矩-平均曲率关系计算构件的变形是合理的。
- 钢筋混凝土梁 /
- 复合纤维增强材料 /
- 裂缝分布 /
- 局部曲率 /
- 挠度
Abstract: A model consisting of a system of nonlinear differential equations, named block model, was constructed to study the local curvature between two adjacent cracks.Utilizing this model, the deflections at the midspan in 10 RC beams bonded with external CFRP were simulated when the distance between two consecutive cracks was the maximum crack spacing 2Lb and minimum crack spacing Lb, which could be obtained from cracking analysis based on bond stress and slip.Comparisons between the simulated midspan deflection and that of experiment indicate that the proposed nonlinear model is able to predict the deformability behavior of RC beams strengthened with external CFRP sheets.Furthermore, the results indicate that the crack distribution has little influence on deflection of beam, so the traditional approach called moment-average curvature is reasonable to calculate the deflection of beam in practice.
- RC beam /
- CFRP /
- crack distribution /
- local curvature /
- deflection

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参考文献(11)

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