Modelling of CFRP strengthening on the behavior of RC slender columns
Abstract
This paper addresses the strength and deformation capacity of slender columns retrofitted by externally bonded Carbon Fiber-Reinforced Polymers (CFRP) subjected to seismic loading. The behaviour of RC columns depending on the CFRP confinement (carbon CFRP jacket) and on flexural reinforcement (carbon plates) was analysed by a nonlinear finite element method based on multilayer shell element and multifiber beams with plasticity and damage models. The numerical results in terms of the load-displacements are very consistent with experimental data. The observed failure modes and crack patterns are satisfactorily reproduced for both columns, without or with the CFRP strength.
Keywords: FEA, concrete columns, retrofitting, CFRP.
Received: October 9th, 2017; revised: October 30th, 2017; accepted: November 2nd, 2017
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