SLAB-COLUMN EDGE CONNECTIONS SUBJECTED TO HIGH MOMENTS

This paper presents test results of eight large-scale reinforced concr ete flat plate edge connections. The test specimens consisted of two i dentical series. Each series consisted of four specimens, two with ope nings, in the vicinity of the column, and the other two without openin gs. One of the specimens without an opening contained shear studs as s hear reinforcement. The tests were designed to study the effect of hig h moment-to-shear ratio on the punching shear behaviour of the slab-co lumn edge connections with openings. Each series was subjected to a di fferent moment-to-shear ratio. The test parameters were the location o f openings around the column, the shear reinforcement, and the moment- to-shear ratio. The openings in the specimens were square with the sid es parallel to the sides of the column. The square dimension of the op enings (150 x 150 mm) was 60% of the square column dimension. The slab s contained typical flexural reinforcement (ACI 318-95 and CSA A23.3-9 4) with the additional reinforcement added on the sides of the opening s (equivalent to that interrupted by an opening). The design procedure s in the Canadian and American codes (CSA A23.3-94 and ACI 318-95) are discussed and compared with the test results.