Enhancement Energy Absorption in Flat Slabs Using Slurry Infiltrated Fibrous Concrete

Abstract

In this paper, enhancing the energy absorption by using slurry infiltrated fibrous concrete (SIFCON) in flat slab-column connection is studied. Eight specimens of reinforced concrete slabs identical in reinforcement and dimensions were tested, six of them were casted as a hybrid reinforced concrete slabs [normal strength concrete (N.S.C) and SIFCON] and the remaining two slabs were casted with a N.S.C as control specimens. SIFCON was casted monolithically with a N.S.C with a different thickness by a square shape of side length (0.5 d) at the center of the specimens, once at all the thickness of cross section of the slab (80 mm) and the others at half thickness (40 mm) either at compression or tension face of the slabs. Two types of fiber were used in SIFCON. All specimens were tested under the same condition by applied a vertical load downward through a square column with dimensions of (100*100*200 mm). The results showed that the use of SIFCON increasing the energy absorption for all cases with a varying percentage according to the location of casting SIFCON within the cross section of the slabs and the type of fibers which used in SIFCON. The enhancement in energy absorption due to using SIFCON with a square shape at center of slabs (155 mm) was ranged from 36.04% to 77.37% compared with the control specimens.