Behavior of FRP strengthened RC brick in-filled frames subjected to cyclic loading

Balvir Singh, R. Siva Chidambaram, Shruti Sharma and Naveen Kwatra

Abstract

Fiber reinforced polymer (FRP) sheets are the most efficient structural materials in terms of strength to weight ratio and its application in strengthening and retrofitting of a structure or structural elements are inevitable. The performance enhancement of structural elements without increasing the cross sectional area and flexible nature are the major advantages of FRP in retrofitting/strengthening work. This research article presents a detailed study on the inelastic response of conventional and retrofitted Reinforced Concrete (RC) frames using Carbon Fibre Reinforced Polymers (CFRP) and Glass Fiber Reinforced Polymers (GFRP) subjected to quasi-static loading. The hysteretic behaviour, stiffness degradation, energy dissipation and damage index are the parameters employed to analyse the efficacy of FRP strengthening of brick in-filled RC frames. Repair and retrofitting of brick infilled RC frame shows an improved load carrying and damage tolerance capacity than control frame.

Key Words

retrofitting; vibration; brick infills; RC frame; frequency response function; damage index; GFRP; CFRP; vibration monitoring

Address

Balvir Singh : Department of Civil Engineering, Thapar University, Patiala, Punjab, India R. Siva Chidambaram : CSIR-Central Building Research Institute, Uttarakhand, Roorkee-247667, India Shruti Sharma : Department of Civil Engineering, Thapar University, Patiala, Punjab, India Naveen Kwatra : Department of Civil Engineering, Thapar University, Patiala, Punjab, India

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