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Experimental Study on Shear Behavior of Reinforced-Concrete Members Fully Wrapped with Large Rupture-Strain FRP Composites

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Title: Experimental Study on Shear Behavior of Reinforced-Concrete Members Fully Wrapped with Large Rupture-Strain FRP Composites
Authors: Jirawattanasomkul, Tidarut Browse this author
Dai, Jian-Guo Browse this author
Zhang, Dawei Browse this author
Senda, Mineo Browse this author
Ueda, Tamon Browse this author →KAKEN DB
Keywords: Fiber-reinforced polymer (FRP)
Polyethylene terephthalate (PET) fiber
Large rupture strain (LRS)
Reinforced concrete beams
Shear strength
Shear deformation
Issue Date: Jun-2014
Publisher: American Society of Civil Engineers
Journal Title: Journal of Composites for Construction
Volume: 18
Issue: 3
Publisher DOI: 10.1061/(ASCE)CC.1943-5614.0000442
Abstract: This paper presents an experimental study on the shear behavior of RC members fully wrapped with polyethylene terephthalate (PET) fiber-reinforced polymer (FRP) composites, which are a new type of FRP material characterized by a much larger rupture strain (LRS) compared with conventional FRPs (i.e., made of carbon, glass, and aramid fibers). A total of 10 PET fully-wrapped RC beams, which were designed to fail in shear and with different shear-span to effective-depth ratios, transverse reinforcement ratios and shear strengthening ratios, were tested under 4-point bending loads. The overall load-deflection responses and the shear deformation of the beams as well as the strain development of the transverse steel reinforcement and the FRP jackets were carefully observed. Based upon the extensive strain measurements, the shear contributions by concrete, FRPs, and transverse reinforcement are differentiated. It was found that the use of PET FRP composites as the jacket material of RC members could shift the mode of shear failure from a brittle one to an ideal ductile one whereas the ultimate state of the members is no longer caused by FRP fracture. In order to efficiently predict the shear strength of RC members wrapped by LRS FRPs, the effective strain in LRS FRPs and the degradation of concrete at the peak member shear strength should be appropriately considered.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 上田 多門

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