Behavior of Reinforced Concrete Slabs Subjected to Combined Punching Shear and Biaxial Tension

摘要

This report summarizes experimental results on peripheral (punching) shear strength of precracked, biaxially tensioned, orthogonally reinforced concrete slabs. The 6 inch thick, 4 foot square test specimens were designed to simulate the stress state in the wall of a pressurized containment vessel subjected to combined internal pressurization (which produces biaxial tension) and punching loads normal to the wall. Seven specimens were tested to study the influence of level of biaxial tension, shear span, size of loaded area, and reinforcing ratio on punching shear strength. The levels of biaxial tension, 0 and 0.8f sub y, were used.