TY - JOUR ID - TI - Steel Stiffeners for Enhancement of Slab-Column Connections AU - Safa S. Kadhim AU - Haider K. Ammash PY - 2019 VL - 12 IS - 4 SP - 199 EP - 206 JO - Al-Qadisiyah Journal for Engineering Sciences مجلة القادسية للعلوم الهندسية SN - 19984456 24117773 AB - This paper introduced a strengthening technique for flat plates using steel stiffeners. In this paper, the effectiveness of steel stiffeners with different arrangements and numbers on the punching shear strength. The strengthening steel plates were extended from column to the slab and acted as a column capital of an equivalent concrete column capital. The study was divided into two parts, the first part was the experimental study involves the molding three reinforced concrete flat slab strengthening with different dimensions and numbers of steel stiffeners, with changed the dimensions of steel plates for specimens (SS1 (100×100mm), SS2 (200×200mm), and SS3 (300×300mm)) in addition to reference model without strengthening. The load-capacity of the strengthened slabs was increased by (39.84%, 57%, and 99.2%) respectively over that of the control specimen with slabs (SS1, SS2, and SS3). The second part that numerical modeling through the ABAQUS finite element program was introduced. Effect of the steel stiffeners' size and the effect of the column's shape (rectangular and circular) that's deal with steel stiffeners were studied experimentally and numerically. A good agreement was obtained between the experimental and theoretical results.

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