Behaviour of Restrained Sifcon Two Way Slabs, Part 2: Punching Shear
Author(s):
Abstract:
In part 1 of this paper, flexural tests conducted on restrained SIFCON two way slabs weredescribed and the load-deflection responses under flexural loading were reported. Threedifferent types of slabs i.e. SIFCON slabs, FRC slabs and PCC slabs were investigated. Itwas found that flexural performance of SIFCON slabs is quite superior when compared toFRC and PCC slabs. Among SIFCON slabs those containing twelve percent fibres byvolume exhibited excellent load carrying capacities, ductility and energy absorptioncapacities.In part 2 of the paper, the effect of various volume percentage of steel fibre in SIFCONslab specimens subjected to punching shear was studied. The punching shear load wasapplied to simulate a column-footing connection. From experimentation, the failure loads,deflection and crack patterns in punching shear were studied. Fibre reinforced concrete(FRC) and plain cement concrete (PCC) slab specimens were used as control specimens.The results reported that SIFCON slabs with 12% fibre volume possess high performancethan the other slab specimens in all respects. The experimental results are compared withthe ACI and IS codes and the need for separate provisions for SIFCON in punching shear isemphasised. A regression model has been developed to predict the punching shear capacity of SIFCON slabs.
Language:
English
Published:
Asian journal of civil engineering, Volume:10 Issue: 4, Aug 2009
Page:
481
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