Experimental Investigation on the Effectiveness of Truss-Shaped Punching Shear Reinforcement in Flat Slab

IF 0.9 Q3 ENGINEERING, MULTIDISCIPLINARY

Journal of Engineering and Technological Sciences Pub Date : 2022-07-18 DOI:10.5614/j.eng.technol.sci.2022.54.4.2

S. Salehuddin, S. Zaini, M. A. Megat Johari, N. L. Rahim, M. A. Rahim

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Abstract

The use of reinforced concrete flat slabs in building construction increases the floor-to-floor clearance, expedites site operations, and offers aesthetically rewarding features. However, punching shear failure in a flat slab is brittle in nature and can be potentially catastrophic. Many studies have been conducted to improve the punching shear capacity of flat slabs but some of the proposed punching shear reinforcements were complicated and costly. This research aimed to evaluate the effectiveness of a simple and cost-effective; truss-shaped punching shear reinforcement embedded in a 1200 mm × 1200 mm × 175 mm thick flat slab specimen. Three types of truss-shaped punching shear reinforcements were prepared. All specimens were supported at the edges and subjected to gravity load tests. The results showed that the introduction of truss-shaped punching shear reinforcement increased the punching shear capacity in the range of 7.71% to 21.47%. The maximum deflection of these specimens exhibited an insignificant increase compared to the control specimen, suggesting that punching failure governed the ultimate behavior. The additional strength offered by truss-shaped punching shear reinforcement makes flat slabs as a construction material more appealing because they allow them to withstand higher design loads.

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平板桁架冲剪加固有效性试验研究

在建筑施工中使用钢筋混凝土平板增加了楼层间的间隙，加快了现场操作，并提供了美观的特点。然而，平板的冲孔剪切破坏本质上是脆性的，可能是灾难性的。为了提高平板的冲剪承载力，已经进行了许多研究，但目前提出的一些冲剪钢筋结构复杂，造价昂贵。本研究旨在评价一种简单、经济、有效的方法;在1200mm × 1200mm × 175mm厚平板试件中嵌入桁架型冲剪钢筋。制备了三种桁架型冲剪钢筋。所有试件均在边缘处支承，并进行重力载荷试验。结果表明:引入桁架型冲剪配筋后，冲剪承载力提高幅度为7.71% ~ 21.47%;与对照试件相比，这些试件的最大挠度呈现出不显著的增加，表明冲孔破坏控制了最终行为。桁架形冲孔剪切钢筋提供的额外强度使平板作为一种建筑材料更具吸引力，因为它们允许它们承受更高的设计载荷。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Engineering and Technological Sciences ENGINEERING, MULTIDISCIPLINARY-

CiteScore

2.30

自引率

11.10%

发文量

审稿时长

24 weeks

期刊介绍： Journal of Engineering and Technological Sciences welcomes full research articles in the area of Engineering Sciences from the following subject areas: Aerospace Engineering, Biotechnology, Chemical Engineering, Civil Engineering, Electrical Engineering, Engineering Physics, Environmental Engineering, Industrial Engineering, Information Engineering, Mechanical Engineering, Material Science and Engineering, Manufacturing Processes, Microelectronics, Mining Engineering, Petroleum Engineering, and other application of physical, biological, chemical and mathematical sciences in engineering. Authors are invited to submit articles that have not been published previously and are not under consideration elsewhere.