Title: Investigation of HFRC beams retrofitted using GFRP for enhancement in flexural capacity

Authors: Muthu Vinod Kumar; Muthiah Muthukannan

Addresses: VEL TECH Rangarajan Dr. Sangunthala R&D Institute of Science and Technology, Chennai, Tamil Nadu, India ' Department of Civil Engineering, Kalasalingam University, Tamil Nadu, India

Abstract: The applications of FRP have been widely used in repair and upgrading of concrete structures. Research and design guidelines accomplished that externally bonded FRP could increase the load carrying capacity of RC elements efficiently. A study was undertaken to investigate the flexural behaviour of hybrid fibre reinforced concrete (HFRC) beams, which were preloaded and retrofitted by externally bonded with glass fibre reinforced polymer (GFRP) laminate to the bottom (soffit) of the beam. The compressive, split tensile and flexural strength tests were conducted to find the optimum percentage of hybrid fibre which can be used for casting of beam specimens. Two sets each containing three numbers of beams were cast and tested in this study. Based on the test results, it is found that the HFRC beams retrofitted with GFRP show an improvement in load carrying capacity of about 45% and 23% than the same set of retrofitted control beams.

Keywords: hybrid fibre reinforced concrete; HFRC; glass fibre reinforced polymer; GFRP; laminate; steel; glass and polypropylene fibres; nonlinear finite element analysis; NLFEA; finite element analysis; FEA; ANSYS.

DOI: 10.1504/IJMTM.2020.105825

International Journal of Manufacturing Technology and Management, 2020 Vol.34 No.1, pp.1 - 24

Received: 11 Apr 2017
Accepted: 15 Jun 2017

Published online: 12 Mar 2020 *

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