An Experimental Study on the Critical Section of Punching Shear Strength in Donut type Biaxial Hollow Slab

The hollow slab system is effective slab system which can reduce self-weight of slab. The present research is being verified for performance of hollow slab. According to previous studies, the hollow slab has weak performance in slab-column connection. Also, the present code does not provide computation method for the punching shear strength of hollow slab. In this study, full sized slab-column connection tests were performed to find out the critical section of donut type hollows slab. The test parameter was the number of donut type hollow spheres in critical section surrounding column