Title: Reexamination of Punching Shear Strength and Deformation Capacity of Corner Slab-Column Connection

Author(s): MARNIE B. GIDUQUIO, MIN-YUAN CHENG, LANGA S. DLAMINI

Publication: CRC

Volume:

Issue:

Appears on pages(s):

Keywords: punching, shear, shear strength, slab-column connection, ACI 318-14, shear decay model

DOI:

Date: 12/1/2017

Abstract:
Effects of slab flexural reinforcement on the punching shear strength and deformation capacity of corner slab-column connections without shear reinforcement are evaluated in this study. Six isolated corner slab-column subassemblages were tested under combined gravity-type loading and lateral displacement reversals. Results from present and previous studies indicate that punching shear strength and deformation capacity per ACI 318-14 is not conservative for corner slab-column connections. For connections subjected to gravity-type loads only, a shear strength model considering effects of the equivalent slab top flexural reinforcement ratio and the critical section aspect ratio (bo/d) is proposed. For connections subjected to combined gravity-type loads and lateral displacement reversals, the gravity shear ratio determined based on the proposed model improves applicability of the shear decay model per ACI 318-14.