Title: Failure Mode and Shear Strength of Nonprestressed Hollow-Core Slabs in One-Way Shear

Author(s): Tae-Sung Eom, In-Hye Hwang, Seung-Jae Lee, and Tae-Won Park

Publication: Structural Journal

Volume: 115

Issue: 4

Appears on pages(s): 1131-1141

Keywords: hollow-core slabs; reinforced concrete; shear strength; shear test; T-beams; void slabs

DOI: 10.14359/51702064

Date: 7/1/2018

Abstract:
In this study, the failure mode and shear strength of nonprestressed hollow-core slabs in one-way shear are investigated. First, nine hollow-core slabs with different void properties, such as the shape, location, and area of voids, are tested. The tests show that the nonprestressed hollow-core slabs are failed mainly by inclined tensile cracking in the compression zone, and the shear strengths of the hollow-core slabs are 20% to 30% less than that of the solid slab. Then, to estimate the slab shear strength depending on void properties, design equations based on a compression zone failure mechanism under inclined tensile cracking are formulated. For verification, the proposed method is applied to 50 specimens with a wide range of design parameters. The results show that the predictions of the proposed methods agree with the test strengths.