Deflection Of Reinforced Concrete Beam Cfrp Bar With U-Wrap Cfrp Sheet as Shear Reinforcement

Kusnadi Kusnadi,Ichsan Rauf,Rita Irmawaty,I.H.A Wahab,R Mardian,A.P Bayuseno

doi:10.1051/e3sconf/202132810012

Abstract

The purpose of this study was to understand the deflection behavior of reinforced concrete beams using GFRP bar as flexural reinforcement and GFRP sheet as shear reinforcement. The tested beams with dimensions of span length were 3000 mm, width of 150 mm and height of 250 mm of concrete quality f'c.25 MPa. The beams use GFRP bar 3D13 as flexural reinforcement and U-wrap GFRP sheet 50 mm wide with a distance of 100 mm. U-wrap GFRP sheet shear reinforcement is only installed in shear spans. The beam is loaded with two concentrated loads monotonically until it collapses. The test results show that the loaddeflection relationship of GFRP bar reinforced concrete beams with external shear reinforcement of U-wrap GFRP sheet shows two linear curve patterns. The results of the analysis show that the ACI-440.1R-06 approximation equation can be used to accurately predict the deflection in the middle of the GFRP bar reinforced concrete beam with external shear reinforcement from U-wrap GFRP sheet.

Highlights

Buildings that use steel-reinforced concrete in corrosive areas, such as the marine environment, are damaged by corrosion
To increase the durability of reinforced concrete buildings, steel reinforcement can be replaced with GFRP bars that are resistant to corrosion and serve as flexural reinforcement [1]
Steel stirrups as internal shear reinforcement can be replaced with U-wrap GFRP sheets as external shear reinforcement [2]

Summary

Introduction

Buildings that use steel-reinforced concrete in corrosive areas, such as the marine environment, are damaged by corrosion. Corrosion may reduce the cross-sectional area of steel reinforcement in addition to destroying the concrete from within by cracking and spalling. To increase the durability of reinforced concrete buildings, steel reinforcement can be replaced with GFRP bars that are resistant to corrosion and serve as flexural reinforcement [1]. Steel stirrups as internal shear reinforcement can be replaced with U-wrap GFRP sheets as external shear reinforcement [2]. Because the GFRP bar reinforcement is resistant to corrosion, a concrete blanket to protect the reinforcement is not required. The longitudinal reinforcement is positioned as close as possible to the outer fibers of the cross-section so that its effective height can be maximized

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