Flexural behaviour of reinforced concrete beams strengthened with NSM CFRP prestressed prisms

Jiong-Feng Liang, Deng Yu, Shengjun Xie and Jianping Li

Abstract

The behaviour of reinforced concrete beams strengthened with near surface mounted (NSM) CFRP prestressed prisms was experimentally investigated. Five RC beams were tested under four point bending. All beams were made with dimensions of 300 mm in width, 2000 mm in length and 150 in depth. The effects of presstress level of CFRP prestressed prisms and prism material type were studied. The failure mode, load capacity, deflection, CFRP strain, steel strain and ductility of the tested beams were all analyzed. The results showed that the behavior of the reinforced concrete beams strengthened with NSM CFRP prestressed prisms showed a significant increase in the load-carrying capacity and the deformation capacity. The NSM CFRP prestressed prisms strengthening technique could be considered as an effective method for repairing RC structures.

Key Words

flexural behaviour; near surface mounted; CFRP; strengthened; beam

Address

Jiong-Feng Liang: Jiangxi Engineering Research Center of Process and Equipment for New Energy, East China Institute of Technology, 418 Guanglan Road, Nanchang, P.R. China; Faculty of Civil and Architecture Engineering, East China Institute of Technology, 418 Guanglan Road, Nanchang, P.R. China Shengjun Xie and Jianping Li: Faculty of Civil and Architecture Engineering, East China Institute of Technology, 418 Guanglan Road, Nanchang, P.R. China Deng Yu: College of Civil and Architecture Engineering, Guangxi University of Science and Technology, 268 Donghuan Road, Liuzhou, P.R. China

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