Article: Experimental investigation on suitability of FRP retrofitting of all possible types of RC deficient beam-column joints under cyclic loading Journal: International Journal of Structural Engineering (IJSTRUCTE) 2026 Vol.16 No.1 pp.29 - 45 Abstract: One of the crucial components of a structural system is the beam-column joint. Behaviour of beam-column joint during earthquakes is very important. In the present experimental study, three different forms of beam-column connections with distinct flaws were taken into consideration. CFRP and GFRP were used to retrofit the defective joints. Cyclic load was applied using servo hydraulic dynamic actuator. To get prior knowledge of the load and deflection, nonlinear static analysis was performed. Strength-based criteria were also used in the analysis. The recorded data were used for drawings of the hysteresis loop, envelope curve, stiffness variation, and energy dissipation with respect to drift angle. Comparison between the test results of control and retrofitted specimens were done. Conclusions regarding the improvement in design parameters as a result of retrofitting were drawn. The outcome showed that all parameters had significantly increased due to FRP retrofitting. Seismic loads were the main focus of this investigation. Many structures in Houston were harmed by the most recent hurricane. The hurricane load is comparable to earthquake loading. The outcome is therefore extremely important for Houston's hurricane-affected buildings to be retrofitted. Inderscience Publishers - linking academia, business and industry through research

Title: Experimental investigation on suitability of FRP retrofitting of all possible types of RC deficient beam-column joints under cyclic loading

Authors: Abdul M. Choudhury

Addresses: Department of Civil and Environmental Engineering, Prairie View A&M University, Prairie View, TX 77446, USA

Abstract: One of the crucial components of a structural system is the beam-column joint. Behaviour of beam-column joint during earthquakes is very important. In the present experimental study, three different forms of beam-column connections with distinct flaws were taken into consideration. CFRP and GFRP were used to retrofit the defective joints. Cyclic load was applied using servo hydraulic dynamic actuator. To get prior knowledge of the load and deflection, nonlinear static analysis was performed. Strength-based criteria were also used in the analysis. The recorded data were used for drawings of the hysteresis loop, envelope curve, stiffness variation, and energy dissipation with respect to drift angle. Comparison between the test results of control and retrofitted specimens were done. Conclusions regarding the improvement in design parameters as a result of retrofitting were drawn. The outcome showed that all parameters had significantly increased due to FRP retrofitting. Seismic loads were the main focus of this investigation. Many structures in Houston were harmed by the most recent hurricane. The hurricane load is comparable to earthquake loading. The outcome is therefore extremely important for Houston's hurricane-affected buildings to be retrofitted.

Keywords: beam-column connection; deficient specimen; dynamic load; retrofitted; flexure; shear; carbon fibre reinforced polymer; CFRP; glass fibre reinforced polymer; GFRP.

DOI: 10.1504/IJSTRUCTE.2026.151682

International Journal of Structural Engineering, 2026 Vol.16 No.1, pp.29 - 45

Received: 28 Dec 2023
Accepted: 17 Mar 2024
Published online: 13 Feb 2026 *

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Title: Experimental investigation on suitability of FRP retrofitting of all possible types of RC deficient beam-column joints under cyclic loading

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