NUMERICAL STUDY OF CONFINEMENT EFFECT OF FRP COATINGS ON BEHAVIOR OF RC FRAMES BY USING NONLINEAR ANALYSIS

Hossein Tahghighi; Mohammad Rashid Gholami

doi:10.5937/jaes16-16866

Hossein Tahghighi Hossein Tahghighi University of Kashan, Kashan, Islamic Republic of Iran
Mohammad Rashid Gholami University of Kashan, Iran

DOI: https://doi.org/10.5937/jaes16-16866

Keywords: Nonlinear analysis, Flexural retrofitting, Confinement, FRP materials, Reinforced concrete,

Abstract

Confinement of both existing and newly constructed reinforced concrete (RC) frames by fibre reinforced polymer (FRP) has been commonly used in recent decades. This is because of its ability to enhance the behavior of RC frames under lateral loading. The purpose of this research is to perform a numerical study on effect of FRP confinement on strength and ductility of RC frames using OpenSEES software. After evaluating the accuracy of numerical model results by comparison with experimental results, the behavior of FRP-resistant frames is discussed. The 8-story studied building is reinforced in various ways by GFRP and CFRP composite sheets. Results of nonlinear analysis show that un-wrapped frame exhibits low resistance and less energy absorption. However, the loading capacity and the performance level have improved significantly in the frames strengthened with FRP materials. Also, increased capacity and reduced drift present more amount of increment in cases which CFRP materials are used.