Punching shear behaviour and design of an innovative connection between steel tubular column to flat concrete slab

摘要

This paper presents the results of an experimental and numerical investigation into the punching shear behaviour of a simple and effective method of connection between steel tubular columns and concrete flat slabs using welded shear studs. These studies have investigated the effects on punching shear behaviour and resistance of the proposed shear connection system under different design variables including concrete depth above the shear stud, concrete compressive strength, concrete tensile strength, and shear stud dimensions (length and diameter). The results indicate that the punching shear resistance of the proposed connection system is directly affected by concrete tensile strength rather than concrete compressive strength. An existing method has been modified accordingly. A series of numerical simulations of steel column-rnconcrete flat slab assembly were carried out and the results indicate that it is possible to use the proposed simple connection system to provide sufficient punching shear resistance in realistic flat slab construction.