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Abstract
Flat-slab system is widely used nowadays. It permits architecturalflexibility, more clear space, less building height, easier formwork, andshorter construction time. It is important to study the structural elementsof this system with more details to insure safety against all kind of failure.The major and critical failure criterion of this system is the punching shearfailure, which happens by a local failure of slab-column connection due tohigh shear stresses produced by the transfer of vertical force and bendingmoment between the slab and the column. The flat slab system can bestrengthened against punching shear failure by using DROP panels, columnheads, and shear reinforcement. Often DROP panels and column heads areunacceptable for aesthetic and architectural reasons, and complicate theformwork and the construction process. The shear reinforcement is moresophisticated from both architectural and economical point of view,because it maintains the flat slab construction uninterrupted. Manyresearches have been carried out on the interior and edge column to flatslab connection more than corner one. So this research discusses thebehavior of the flat slab to corner column connection and how tostrengthen this region with variable techniques considering the steeldistribution and shape. Eight half scale slab-column connections modelthe area of negative bending moments around a corner column in a flatslab system, were tested under gravity loads. Specimens investigate theconnection strength with respect to the tension steel ratio, reinforcementarrangement, shear stirrups configuration and inclination, andcompression steel. Test results were compared with the calculated valuesbased on several available codes. Nonlinear finite element analysis usingANSYS10 software was carried out to verify the experimental results.