International Journal of Civil and Structural Engineering Research ISSN 2348-7607 (Online) Vol. 10, Issue 1, pp: (99-109), Month: April 2022 - September 2022, Available at: www.researchpublish.com
Behaviour of high rise irregular plan steel building in progressive failure due to sudden column removal Mohamed Basel Emara1, Sameh Moustafa Gaawan2, Mahmoud Shahat Mahmoud3, Mohamed Mohamed Yahia4 1
Professor of Analysis and Mechanics of Structures, 2Professor of Steel Structures,
3
Teaching Assistant of Structural Engineering, 4Assistant Professor of Structural Engineering Faculty of Engineering at Mataria, Helwan University, Cairo, Egypt DOI: https://doi.org/10.5281/zenodo.6635695 Published Date: 12-June-2022
Abstract: Progressive failure can be described as step-by-step failure in building caused by the sudden loss of one or a few structural elements, which generates a chain reaction of failures for the adjacent structural elements, which leads to the entire structure failing. One of the factors that can amplify the damage caused by progressive failure is building irregularity. Three dimensional modeling, using the finite element method was developed to investigate the progressive failure of high rise irregular plan building consist of 30 storey with rigid moment resisting steel frames. Non-linear dynamic analysis is carried out following GSA guidelines using ABAQUS software. The modeling techniques were described in detail. The obtained numerical results are compared with experimental data and good agreement is attained. Using this model, the structural behavior of the building under the sudden columns loss for different scenarios of column removal were assessed in detail. Keywords: Progressive failure; Nonlinear dynamic analysis; High rise steel building; Finite element; Column removal.
1. INTRODUCTION In the past decades, several instances of progressive failure for buildings under unexpected loads caused by manmade or natural hazards have occurred. The potential events causing such failure include: vehicle collision, gas explosion, blast attacks, fire, earthquakes, sudden column loss, etc. Progressive failure is a collapse to an extent disproportionate to the cause and is usually triggered by the aforementioned events. Since the progressive failure events, such as the apartment building at Ronan Point in London, UK in 1968 [1], the Alfred P. Murrah Building failure in Oklahoma, USA in 1995 [2], and the World Trade Centre collapse in New York, USA in 2001 [3], many design codes, standards, and guidelines were published to avoid the damage caused from the progressive failure. The American Society of Civil Engineers (ASCE) [4] provides two general design approaches to minimize the potential of progressive collapse, which are direct design approach and indirect design approach for maintaining structural integrity after an unforeseen event. The U.S. General Services Administration (GSA) [5], [6] guidelines describe linear and nonlinear static as well as dynamic procedures to prevent widespread collapse after a local failure has occurred. The U.S. Department of Defense (DoD) [7], [8] published a document, “Design of buildings to resist progressive collapse”, in the frame work of the Unified Facilities Criteria (UFC). This document provided some provisions to analyze and design the buildings to withstand progressive collapse. Both (GSA) and (DoD) employ the alternate path method (APM) to ensure that structural systems have adequate robustness against progressive failure. When a structure is exposed to a severe load, APM allows for local failure, but it also aims to provide other load routes so that the initial damage can be limited and major collapse avoided. Many researchers investigated the behaviour and establish design methodologies for progressive failure. They have performed their studies in different techniques by experimental investigations, numerical models, and analytical solutions.
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