(河南理工大学土木工程学院，焦作 454003)

［摘要］根据相关文献的试验结果，分析了CFRP剥离对CFRP抗弯加固钢筋混凝土梁正截面承载力的影响，并推导了采用应变折减系数β予以修正的正截面承载力公式；建立了CFRP发生端部剥离时纤维材料的有效拉应变计算公式，公式计算结果均与试验结果吻合较好。

［关键词］CFRP；剥离；抗弯加固；钢筋混凝土； 正截面承载力； 极限拉应变

CFRP debonding on normal section bearing capacity of flexural strengthening RC beams

Li Yan, Liu Zejun

(School of Civil Engineering， Henan Polytechnic University， Jiaozuo 454003, China)

Abstract:According to the test results of relevant documents, the effect of CFRP debonding on normal section bearing capacity in flexural strengthening reinforced concrete beams was studied. The formula on normal section bearing capacity modified by the reduction factor β was deduced. The formula for the effective CFRP strain was also proposed when CFRP end debonded. The comparison shows that theoretical results are in good agreement with experimental results.

Keywords:CFRP; debonding; flexural strengthening; reinforced concrete; normal section bearing capacity; ultimate tensile strain

国家自然科学基金项目（50804014），河南省重点学科资助项目（504906），河南省教育厅自然科学研究资助项目（2007560005