Overview of the punching capacity of the flat slab under reversed cyclic loading and methods of improvement

Q2 Engineering Asian Journal of Civil Engineering Pub Date : 2023-12-13 DOI:10.1007/s42107-023-00934-5

Khaled Fawzy, Hilal Abdel Kader Mahmoud, Mohamed Selim, Khaled Fawzy Kotb

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Abstract

Flat slab buildings gain popularity due to their architectural and aesthetic advantages, including lower building height, expedited construction, simpler formwork, unobstructed ceiling height, and simpler reinforcement placement. With increasing high-rise building trends, flat slab construction is extensively used in RC structures worldwide. One of the most crucial factors to consider when designing RC flat slabs is punching. Especially when exposed to gravity and inverted cyclic load. Several variables influence the flat slab’s slab-column connection (SCC) punching behavior under cyclic loading. These factors are shear reinforcement, gravity, horizontal loading, opening presence, concrete compressive strength, loading area dimension, internal RFT type, and tension reinforcement proportion. This paper thoroughly analyzes the aforementioned experimental and finite element investigations. This paper reviews the literature on the punching shear (PS) mechanism in flat slabs (FS) and discusses various RFT types versus PS. In addition, to illustrate the potential of SMAs as internal reinforcement, repairing, strengthening of damaged beams/beam-column connections, moderating deflection, self-repairing concrete, and in seismic application.

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反向循环荷载下平板冲孔能力概述及改进方法

平板建筑因其建筑和美学方面的优势而广受欢迎，这些优势包括降低建筑高度、加快施工进度、简化模板、无遮挡的天花板高度以及更简单的钢筋布置。随着高层建筑的不断增加，平板结构在全世界的钢筋混凝土结构中得到了广泛应用。在设计 RC 平板时，冲孔是需要考虑的最关键因素之一。尤其是在承受重力和反循环荷载时。在循环荷载作用下，有几个变量会影响平板的板柱连接（SCC）冲孔行为。这些因素包括剪力配筋、重力、水平荷载、开口存在、混凝土抗压强度、加载区域尺寸、内部 RFT 类型和拉力配筋比例。本文对上述实验和有限元研究进行了深入分析。本文回顾了有关平板（FS）冲剪（PS）机制的文献，并讨论了各种 RFT 类型与 PS 的关系。此外，本文还阐述了 SMA 作为内部加固、修复、加固受损梁/梁柱连接、减缓挠度、自修复混凝土以及抗震应用的潜力。

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来源期刊

Asian Journal of Civil Engineering Engineering-Civil and Structural Engineering

CiteScore

2.70

自引率

0.00%

发文量

121

期刊介绍： The Asian Journal of Civil Engineering (Building and Housing) welcomes articles and research contributions on topics such as:- Structural analysis and design - Earthquake and structural engineering - New building materials and concrete technology - Sustainable building and energy conservation - Housing and planning - Construction management - Optimal design of structuresPlease note that the journal will not accept papers in the area of hydraulic or geotechnical engineering, traffic/transportation or road making engineering, and on materials relevant to non-structural buildings, e.g. materials for road making and asphalt. Although the journal will publish authoritative papers on theoretical and experimental research works and advanced applications, it may also feature, when appropriate: a) tutorial survey type papers reviewing some fields of civil engineering; b) short communications and research notes; c) book reviews and conference announcements.