Effect of blast loading on CFRP-Retrofitted RC columns - a numerical study

This study aims to investigate the effect of blast loads generated as a result of explosive charges on the existing exterior RC circular columns of a typical building in the city of Riyadh. A procedure has been developed for evaluating the dynamic characteristics of the circular column with and without retrofitting. A wide range of parametric studies have been performed as part of this investigation to examine the effects of stand-off distance, charge weight and the presence of CFRP retrofitting on the level of damage to the RC column. The nonlinear finite element analysis was carried out using LS-DYNA software with explicit time integration algorithms. Different charge weights of 100, 200, 500 and 1000 kg equivalent weight of TNT at stand-off distances of 1, 4 and 15 m were considered. Results described in this paper indicate that CFRP strengthening could be an effective solution to limit the damage caused by moderate explosions. The stand-off distance was found to play a very important role in mitigating the adverse effects of a blast. The results also indicate that the maximum lateral deflection experienced by the column decreased exponentially with the increase in the stand-off distance and also decreased for the columns strengthened with CFRP, compared with the unstrengthened columns.

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Bibliographic Details
Main Authors: Elsanadedy,H.M., Almusallam,T.H., Abbas,H., Al-Salloum,Y.A., Alsayed,S.H.
Format: Digital revista
Language:English
Published: Associação Brasileira de Ciências Mecânicas 2011
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-78252011000100004
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