Abstract
Flat slab systems are widely used in modern buildings due to their architectural flexibility and construction efficiency. However, their structural performance is often governed by punching shear failure at slab–column connections, particularly at corner joints where the effective shear perimeter is reduced and biaxial bending is transferred in addition to axial loads. This study investigates the punching shear behavior of corner slab–column connections constructed with high-performance reinforced concrete (HPRC) through experimental testing and numerical analysis. Eight full-scale HPRC slab–column specimens were tested to evaluate the effects of concrete compressive strength (40 and 60 MPa), column dimensions (250 × 250 mm² and 300 × 300 mm²), load eccentricity (55 mm and 110 mm), and the presence of marginal beams. The results showed that slabs with marginal beams exhibited significantly higher punching shear capacity, increasing from 103.5 kN to 157.5 kN and from 154.2 kN to 212.4 kN, depending on the investigated parameters. Nonlinear finite element simulations conducted using ABAQUS showed good agreement with the experimental results, demonstrating the effectiveness of HPRC in enhancing punching shear resistance. The findings provide practical guidance for the design of corner column connections in flat slab systems.