Structural Behaviour of Voided Flat Slab With Various Void Ratios Under Vertical Loading

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-05-12 DOI:10.2478/cee-2023-0027

L. Lakshmi Kanth, P. Poluraju

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引用次数: 0

Abstract

Abstract In recent modern buildings, voided slabs have been implemented because of the high reduction of their weight up to 35 %. Also, CO2 emission takes place which was developed from mass concrete. Due to percentage reduction of concrete, it leads to help the pollution free environment, eco-friendly and also more sustainable. On voided flat slabs, a minimal study has been recorded. In this current study, an approach has been made to study the effect of the position of voids in the voided flat slabs. Two groups of seven specimens each, one slab in each group was a controlled flat slab specimen with zero number of voids kept as a reference specimen, while the others were voided slabs. In each group, the number of voids were used based on the positions. The designation of the specimens is made depending on the number of voids placed and the diameter of the rebar used in the specimens. Group-A was reinforced with 8 mm diameter rebars, and Group-B was reinforced with 6 mm diameter rebars. The parameters of the study are the void positions and the rebar diameter. The specimens were subjected to a gradually concentrated load through the short column up to failure. The load carrying capacity of both voided and controlled flat slabs tested have almost same. It indicates that, the inactive concrete below the neutral axis where high density polyethylene (HDPE) recycled hollow spheres have been provided in the flat slab has shown no impact on load carrying capacity of the test specimens. However, the presence of the punching shear can be seen in the specimens where the voids are positioned near the columns and supports. Besides, ABAQUS program (A finite element based software) was used to perform the finite element analysis for profoundly illustrating the experimental findings and performing a parametric study. It is concluded that the concrete has no role at below the neutral axis of structural voided flat slab cross-section for all specimens including controlled specimens (0VS6, 0VS8). Also, it is noticed that the finite element analysis obtained results have shown more or less same as experimental results. From the present study, it is evident that behaviour of voided flat slabs are different from simply supported voided flat slabs.

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不同孔隙比的空心平板在竖向荷载作用下的结构性能

摘要在最近的现代建筑中，由于空心板的重量减少了35%，因此已经实施了空心板。此外，还发生了由大体积混凝土发展而来的二氧化碳排放。由于混凝土的百分比减少，它有助于无污染的环境，环保，也更可持续。在空心平板上，记录了一项最低限度的研究。在本研究中，采用了一种方法来研究空心平板中空隙位置的影响。两组，每组七个试样，每组一块为对照平板试样，保留零个空隙作为参考试样，而其他为空隙板。在每组中，根据位置使用空隙的数量。试样的名称取决于放置的孔隙数量和试样中使用的钢筋直径。A组用直径8mm的钢筋加固，B组用直径6mm的钢筋加固。研究的参数是孔隙位置和钢筋直径。试件通过短柱承受逐渐集中的荷载，直至失效。试验的空心平板和控制平板的承载能力几乎相同。这表明，在平板中提供了高密度聚乙烯（HDPE）再生空心球的中性轴以下的非活性混凝土对试样的承载能力没有影响。然而，在孔洞位于柱和支撑附近的试样中可以看到冲孔剪切的存在。此外，还使用ABAQUS程序（一种基于有限元的软件）进行了有限元分析，以深入说明实验结果并进行参数研究。得出的结论是，对于所有试样（包括控制试样（0VS6、0VS8）），混凝土在结构空心平板横截面的中性轴以下没有作用。此外，值得注意的是，有限元分析获得的结果与实验结果基本相同。从目前的研究中可以明显看出，空心平板的性能不同于简支空心平板。

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

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.