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quasi-plane-hypothesis of strain coordination for RC beams seismically strengthened with externally-bonded or near-surface mounted fiber reinforced plastic

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Earthquake Engineering and Engineering Vibration 2013年第1期12卷 67-76页

作者： Ren Zhenhua Zeng Xiantao Liu Hanlong Zhou Fengjun School of Building Engineering of Hunan Institute of Engineering College of Civil and Transportation Engineering Hohai University The fourth Engineer Scientific Research Institute of the Headquarters of the General Staff

The application of fiber reinforced plastic（FRP）,including carbon FRP and glass FRP,for structural repair and strengthening has grown due to their numerous advantages over conventional materials such as externally bonded reinforcement（EBR） and near-surface mounted（NSM） strengthening *** paper summarizes the results from 21 reinforced concrete beams strengthened with different methods,including externally-bonded and near-surface mounted FRP,to study the strain coordination of the FRP and steel rebar of the RC *** there is relative slipping between the RC beam and the FRP,the strain of the FRP and steel rebar of the RC beam satisfy the quasi-plane-hypothesis;that is,the strain of the longitudinal fiber that parallels the neutral axis of the plated beam within the scope of the effective height（h 0） of the cross section is in direct proportion to the distance from the fiber to the neutral *** strain of the FRP and steel rebar satisfies the equation：ε FRP =βε steel,and the value of β is equal to 1.1-1.3 according to the test results.

关键词： strain coordination quasi-plane-hypothesis external-bonded near-surface mounted fiber reinforced plastic strengthening concrete beam

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Strain coordination of quasi-plane-hypothesis for reinforced concrete beam strengthened by epoxy-bonded glass fiber reinforced plastic plate

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Journal of Harbin Institute of Technology(New Series) 2006年第4期13卷 391-394页

作者：曾宪桃丁亚红王兴国 The Third Engineer Scientific Research Institute of the Headquarters of the General Staff Dept. of Civil Eng. and Architecture Henan Polytechnic University Dept. of Civil Eng. and Architecture Central South University

The testing of thirteen reinforeed concrete （RC） beams strengthened by epoxy-bonded glass fiber reinforced plastic plate （GFRP） shows that the RC beam and the GFRP plate with epoxy bonding on it can work fairly well in coordination to eaeh other. But there is relative slipping between RC beam and GFRP plate. And the strain of GFRP and steel rebar of RC beam satisfies the quasi-plane-hypothesis, that is, the strain of longitudinal fiher that parallels to the neutral axis of plated beam within the scope of effective height （ h0 ） of the cross section is in direct proportion to the distance from the fiber to the neutral axis. The strain of GFRP and steel rebar satisfies the equation： εGFRP=Kεsteel.

关键词： glass fiber reinforced plastic strengthening concrete beam quasi-plane-hypothesis

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