外贴CFRP加固梁斜截面受力性能的分析和计算

郝震; 曹双寅; 翟瑞兴; 方志保

doi:10.13204/j.gyjz200402024

外贴CFRP加固梁斜截面受力性能的分析和计算

doi: 10.13204/j.gyjz200402024

1.
1. 东南大学土木工程学院南京 210096;
2.
2. 江苏东南特种工程有限公司南京 210018

基金项目:

教育部骨干教师基金资助项目

详细信息

作者简介:
郝震男 1978年9月出生硕士研究生

中图分类号: TU3
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- 被引次数: 0
出版历程
- 收稿日期: 2003-09-20
- 刊出日期: 2004-02-20

ANALYSIS AND CALCULATION OF SHEAR BEHAVIORS FOR BEAMS STRENGTHENED WITH EXTERNALLY BONDED CFRP SHEETS

1.
1. College of Civil Engineering,Southeast University Nanjing 210096;
2.
2. Jiangsu Dongnan Special Engineering Co.,Ltd Nanjing 210018

摘要

摘要: 通过16根钢筋混凝土简支梁外贴CFRP抗剪加固的试验，分析了构件的破坏形态、斜截面纤维应变分布特征及承载力的影响因素。无论构件发生何种破坏，其斜截面纤维的应变分布是不均匀的，纤维材料强度不能得到充分利用。根据试验结果，对斜截面纤维应变分布规律进行了研究，综合考虑裂缝倾角的影响，建立了与构件剪跨比的关系式。在此基础上，提出CFRP加固梁抗剪承载力的计算方法，并对计算值与试验值进行了比较，结果是偏于安全的。
- CFRP /
- 斜截面 /
- 抗剪承载力 /
- 应变分布 /
- 封闭加固 /
- 非封闭加固
Abstract: Based on the experiment of sixteen simply supported beams strengthened in shear with CFRP sheets, the failure modes, the strain distribution feature of CFRP intersected by the oblique section and the influence factors of shear strength are studied. Considering the non uniformity of strains in CFRP and the angle of critical shear crack synthetically, the formulas related with shear span ratio are proposed. And then, a calculation method of the shear bearing capacity is established whose results are acceptable comparing with the experimental data.
- FRP /
- oblique section /
- shear bearing capacity /
- strain distribution /
- closed strengthening /
- unclosed strengthening

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参考文献(7)

[2] 曹双寅, 滕锦光, 陈建飞, 等.外贴纤维加固梁斜截面纤维应变分布的试验研究.土木工程学报, 2003, 36(11)

Khalifa A, Gold W J, Nanni A, et al.Contribution of External Bonded FRP to the Shear Capacity of RC Flexural Members.ASCE Journal of Composites for Construction, 1998, 2(4):195～203

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[7] Ahmed Khalifa, Antonio Nanni.Rehabilitation of Rectangular Simply Supported RC Beams with Shear Deficiencies Using CFRP Composites.Construction and Building Materials, 2003, 16:135～146

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