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(河南理工大學(xué)土木工程學(xué)院，焦作 454003)

［摘要］根據(jù)相關(guān)文獻(xiàn)的試驗(yàn)結(jié)果，分析了CFRP剝離對(duì)CFRP抗彎加固鋼筋混凝土梁正截面承載力的影響，并推導(dǎo)了采用應(yīng)變折減系數(shù)β予以修正的正截面承載力公式；建立了CFRP發(fā)生端部剝離時(shí)纖維材料的有效拉應(yīng)變計(jì)算公式，公式計(jì)算結(jié)果均與試驗(yàn)結(jié)果吻合較好。

［關(guān)鍵詞］CFRP；剝離；抗彎加固；鋼筋混凝土； 正截面承載力； 極限拉應(yīng)變

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

國(guó)家自然科學(xué)基金項(xiàng)目（50804014），河南省重點(diǎn)學(xué)科資助項(xiàng)目（504906），河南省教育廳自然科學(xué)研究資助項(xiàng)目（2007560005