STRENGTHENING OF REINFORCED CONCRETE SLAB-COLUMN CONNECTIONS USING CFRP

Mohamed Elhassan, Savvas Triantafyllou

Abstract


The efficiency of reinforced concrete flat-slab structures in resisting lateral loads relies mainly on the behaviour of slabcolumn connections to restrict lateral motion and inter-story drift. Potential use of carbon fibre reinforced polymer (CFRP) to strengthen six types of flat slab-column connections was investigated, and their performance was compared with their response before strengthening. The six models were tested under gravity and lateral loads using 3D finite
element analyses (FEA) to investigate the effects of using CFRP to strengthen the slab-column connection. A parametric study was conducted to examine effects of bent length of CFRP on column side, and CFRP thickness on the behaviour of the connections. Increasing thickness and the bent length of the CFRP on column side can increase the moment carrying capacity up to 25%. Generally, the results indicate that strength and stiffness of a connection can be
significantly increased, with noticeable decrease in ductility.


Keywords


Flat-Slab; Strengthening;CFRP;Finite Element Analyses;Ductility

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