Title: Modified punching shear equation of RC flat plate structure considering material and geometric parameters

Authors: Mohammad Rafiqul Islam; Tahsin Reza Hossain

Addresses: Department of Civil and Environmental Engineering, Shahjalal University of Science and Technology, Post Box 3114, Sylhet, Bangladesh ' Department of Civil Engineering, Bangladesh University of Engineering and Technology, Post Box 1000, Dhaka, Bangladesh

Abstract: In determining the punching shear capacity of flat plate structure, ACI 318/BNBC does not consider the effect of longitudinal reinforcement, the yield stress of steel, slab thickness, and column dimensions and uses a conservative equation. The present paper carried out a parametric study of material and geometric parameters to identify the effects of different parameters on punching shear strength of flat plates and propose a modified punching shear equation. For this, to investigate the influence of several materials and geometric properties, a numerical model of the slab-column joint of RC flat plate has been developed using 'ABAQUS' software. ACI 318/BNBC code provision is more conservative in the case of the punching shear design of flat plates. It underestimates the influence of maximum material and geometric parameters to predict the actual punching capacity. Hence, a modification to the code equation has been discussed and verified.

Keywords: flat plate structure; slab-column joint; punching shear failure; material parameter; geometric parameter; ABAQUS software.

DOI: 10.1504/IJSMSS.2024.143436

International Journal of Sustainable Materials and Structural Systems, 2024 Vol.6 No.2, pp.109 - 129

Received: 02 Feb 2021
Accepted: 08 Jan 2022
Published online: 20 Dec 2024 *

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