A comparison of the approaches between ACI 318-2014, Eurocode 2 and AS 3600-2018 in the analysis of punching shear

Mpai, Grace (2023) A comparison of the approaches between ACI 318-2014, Eurocode 2 and AS 3600-2018 in the analysis of punching shear. [USQ Project]

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Abstract

Punching shear is a structural behaviour encountered in the analysis and design of reinforced concrete flat slabs. It is caused by the concentration of a load, referred to as a shear force, over a small area. There are differences in the code provisions between the American (ACI 318-2014), European (EN 1992-1-1-2004+A1-2014) and Australian (AS 3600-2018) concrete design codes for the assessment of punching shear.

The aims of this project are to investigate and compare these differences and to rate the cost effectiveness of the three codes for punching shear design. Although various experiments and papers have undertaken to compare the punching shear provisions between codes, there is a research gap for research that considers and rates the cost effectiveness between the codes. Furthermore, when the provisions of codes are compared in experiments, ACI 318 and EN 1992 are often considered, however AS 3600 is seldom included in these experiments. The project aims were achieved through a literature review and a hand calculation comparison between the provisions of the three codes on three typical column locations on a proposed typical residential building floor slab. Utilisation ratios (applied shear/shear capacity) were determined for each of the locations and used as the basis of the findings. A software analysis, using Tekla Structural Designer (TSD), was used to validate and correlate the results from the hand calculation analysis.

The findings of the research are that the punching shear code provisons of ACI 318 and AS 3600 are similar in their approches, however the provisions of EN 1992 differ significantly to the those of the other two codes. EN 1992 was determined to be the most conservative code for punching shear design, with AS 3600 and ACI 318 being second and third respectively. One reason identified for the conservatism noted in EN 1992 is the ultimate limit state (ULS) dead load factor of 1.35 that is considered in the code, while 1.2 is considered in both ACI 318 and AS 3600. These findings indicate that designers who are familiar with the provisions of ACI 318 and AS 3600 should be aware that higher punching shear utilisation ratios will be observed when designing building structures in jurisdictions covered by the Eurocode.


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Item Type: USQ Project
Item Status: Live Archive
Faculty/School / Institute/Centre: Current – Faculty of Health, Engineering and Sciences - School of Engineering (1 Jan 2022 -)
Supervisors: Ferdous, Wahid
Qualification: Bachelor of Engineering (Honours) (Civil)
Date Deposited: 30 Sep 2025 04:22
Last Modified: 30 Sep 2025 04:22
Uncontrolled Keywords: punching shear; concrete slab; Tekla Structural Designer (TSD)
URI: https://sear.unisq.edu.au/id/eprint/52978

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