SHEAR STRENGTHENING OF REINFORCED CONCRETE BEAMS USING SHALLOW-ANGLE CFRP LAMINATE STRIPS

• Main Author: Teo, Wee
• Format: Conference or Workshop Item
• Published: 2012
• Subjects: TA Engineering (General). Civil engineering (General)
• Online Access: http://eprints.utp.edu.my/8295/1/FRP_Shear_Paper.pdf; http://eprints.utp.edu.my/8295/

This paper presents the experiment work to investigate the shear behaviour of RC beams strengthened with externally bonded shallow-angle CFRP laminate strips. Four RC beams with varies inclination of CFRP strips were used; namely 90, 45 and 25-deg. The results of the test shown that shallow-angle of CFRP strips gave superb performance in term of shear strength and deformation behaviour, compared with other conventional strengthening scheme. An optimised truss model, based on the principle of minimum strain energy theorem, was developed and used to predict the shear capacity of the CFRP strengthened beams. It is shown that the proposed model can predict reasonably well to the test results with coefficient of variation (C.O.V) of only 3.11%. Compared to other shear model/method, the proposed model gave a better representative to the actual stress fields and behaviour.