Survival of Reinforced Concrete Flat Plate System against Column Loss

IF 0.8 Q4 ENGINEERING, CIVIL

Electronic Journal of Structural Engineering Pub Date : 2020-06-01 DOI:10.56748/ejse.20244

Waleed E. El-Demerdash, Salah El-Din E. El-Metwally, Mohamed E. El-Zoughiby

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引用次数: 1

Abstract

Column loss in a flat plate building, due to punching shear, explosion, impact load or any acci-dental event, can lead to what is termed progressive collapse. Progressive collapse is inherently a dynamic process, which makes it difficult to experimentally explore structures with real scale. Therefore, this paper aims to numerically investigate the behavior of flat plate systems due to column loss utilizing nonlinear finite element analysis with the aid of the computer software (ABAQUS). In this investigation, the nonlinear dynamic re-sponse of both an old flat plate building, designed according to the ACI 318-71, and a similar modern building, designed according the ACI 318-14, subjected to an instant removal of a column is examined. The obtained results clearly reveal that the old flat plate building without continuous slab bottom reinforcement at columns is highly vulnerable to progressive collapse and the efficiency of the continuous bottom reinforcement within the column strip, as recommended by the ACI 318-14, in preventing the disproportion or progressive collapse of a reinforced concrete flat plate building. Such reinforcement is able to produce alternate load path through the tensile membrane action, thus providing ductility and robustness in the system.

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钢筋混凝土平板体系抗柱损失的生存

由于冲压剪切、爆炸、冲击载荷或任何acci牙科事件，平板建筑中的立柱损失可能导致所谓的渐进式倒塌。渐进坍塌本质上是一个动态过程，这使得很难通过实验探索具有真实规模的结构。因此，本文旨在借助计算机软件（ABAQUS），利用非线性有限元分析对平板系统因柱损失而产生的行为进行数值研究。在本研究中，检查了根据ACI 318-71设计的旧平板建筑和根据ACI 318-14设计的类似现代建筑在瞬间拆除立柱后的非线性动态响应。所获得的结果清楚地表明，柱处没有连续板底钢筋的旧平板建筑极易发生渐进式倒塌，并且ACI 318-14建议的柱带内连续底部钢筋在防止钢筋混凝土平板建筑不均衡或渐进式倒塌方面的效率。这种加固能够通过拉伸膜作用产生交替的载荷路径，从而在系统中提供延展性和坚固性。

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

Electronic Journal of Structural Engineering Engineering-Civil and Structural Engineering

CiteScore

1.10

自引率

16.70%

发文量

期刊介绍： The Electronic Journal of Structural Engineering (EJSE) is an international forum for the dissemination and discussion of leading edge research and practical applications in Structural Engineering. It comprises peer-reviewed technical papers, discussions and comments, and also news about conferences, workshops etc. in Structural Engineering. Original papers are invited from individuals involved in the field of structural engineering and construction. The areas of special interests include the following, but are not limited to: Analytical and design methods Bridges and High-rise Buildings Case studies and failure investigation Innovations in design and new technology New Construction Materials Performance of Structures Prefabrication Technology Repairs, Strengthening, and Maintenance Stability and Scaffolding Engineering Soil-structure interaction Standards and Codes of Practice Structural and solid mechanics Structural Safety and Reliability Testing Technologies Vibration, impact and structural dynamics Wind and earthquake engineering. EJSE is seeking original papers (research or state-of the art reviews) of the highest quality for consideration for publication. The papers will be published within 3 to 6 months. The papers are expected to make a significant contribution to the research and development activities of the academic and professional engineering community.