International Journal of Civil and Structural Engineering Research ISSN 2348-7607 (Online) Vol. 10, Issue 1, pp: (110-118), Month: April 2022 - September 2022, Available at: www.researchpublish.com
Numerical Study for Progressive Failure of High Rise Stepped Steel Building Mohamed Basel Emara1, Sameh Moustafa Gaawan2, Mahmoud Shahat Mahmoud3, Mohamed Mohamed Yahia4 1
Professor of Analysis and Mechanics of Structures, Faculty of Engineering at Mataria, Helwan University, Cairo, Egypt 2 Professor of Steel Structures, Faculty of Engineering at Mataria, Helwan University, Cairo, Egypt 3 Teaching Assistant of Structural Engineering, Faculty of Engineering at Mataria, Helwan University, Cairo, Egypt 4 Assistant Professor of Structural Engineering, Faculty of Engineering at Mataria, Helwan University, Cairo, Egypt DOI: https://doi.org/10.5281/zenodo.6670584
Published Date: 20-June-2022
Abstract: Progressive collapse of a structure happens when one or more primary members are suddenly lost due to an unfortunate accident such as a gas explosion, bomb attack, fire, or overloaded. Building irregularity is one aspect that might aggravate the damage caused by gradual failure. The progressive failure of high rise stepped frames was investigated using 3-dimensional modelling and the finite element approach in this paper. The steel structure has 30 stories and rigid moment-resisting steel frames. Abaqus software is used to perform nonlinear dynamic analysis in accordance with GSA criteria. The results of Abaqus model are verified with an experimental data and good agreement is achieved. The structural behaviour of the building under sudden column loss was studied in detail using this model for several scenarios of column removal. Keywords: Progressive failure; Nonlinear dynamic analysis; High rise steel building; Finite element; Column removal.
1. INTRODUCTION Progressive failure occurs when a system fails in a way that is disproportionate to the reason, and it is frequently brought on by unanticipated extreme occurrences. Over the past years, there have been various cases of buildings failing due to unanticipated loads generated by manmade or natural risks. Vehicle collisions, gas explosions, blast attacks, fire, earthquakes, and rapid column loss are all possible causes of such collapse. Therefore, numerous design codes, standards, and guidelines have been issued in order to prevent the damage caused by progressive failure. The American Society of Civil Engineers (ASCE) [1] recommends two general design approaches for sustaining structural integrity following an unforeseen event: direct design approach and indirect design approach. The US General Services Administration (GSA) standards [2], [3] offer linear and nonlinear static as well as dynamic approaches for preventing broad collapse after a local failure. In the framework of the Unified Facilities Criteria, the US Department of Defense (DoD) [4], [5] published a document titled "Design of buildings to withstand progressive collapse" (UFC). This document included procedures for analysing and designing buildings that would be able to endure progressive failure. Many researchers looked into the behaviour and developed progressive failure design approaches. They conducted their research using a variety of methods, including experimental investigations, numerical models, and analytical methods. Izzuddin et al. [6] created a new methodology for progressive failure assessment. The methodology provides a realistic way to evaluate structural resilience at different levels of structural idealization. Ruth et al [7] evaluated the DoD and GSA guidelines' dynamic increase factor to see how conservative it was. The authors created 11 steel moment frame structures models, including eight two-dimensional and three three-dimensional models. The study showed that a reasonable value of the dynamic multiplier was well below 2.0.
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