Inderscience Publishers

Joint shear strength of exterior beam–column joints reinforced with non–metallic reinforcements

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This experimental study primarily focuses on the joint shear strength of full scale size exterior concrete beam–column joint reinforced internally with glass fibre reinforced polymer (GFRP) reinforcements under monotonically increasing load on beams keeping constant load on columns. Four series of joints and total of 14 numbers of such specimens are cast and tested for different parametric conditions such as beam longitudinal reinforcement ratio, concrete strength, column reinforcement ratio, joint aspect ratio and influence of the joint stirrups at the joint. Also finite element modelling and analysis of GFRP reinforced concrete beam–column joints are performed to simulate the behaviour of the beam–column joints under various parametric conditions. Based on this study, a modified design equation is proposed for predicting the joint shear strength of the GFRP reinforced beam–column specimens using strut–and–tie concept based on the experimental results and the review of the prevailing design equations.

Keywords: non–metallic reinforcements, exterior joints, beam–column joints, finite element method, FEM, modelling, strut–and–tie, joint shear strength, glass fibre reinforced polymer, GFRP reinforced concrete, structural engineering

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