Investigating the effects of sudden column removal in steel structures

Ali Esfandiari Fard,Morteza Biklaryan,Heydar Dashti Nasserabadi

doi:10.1515/nleng-2021-0024

Ali Esfandiari Fard, Morteza Biklaryan + Show 1 more

Open Access

https://doi.org/10.1515/nleng-2021-0024

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Abstract

Abstract Since the effect of the irregularity in height of medium and tall structures has a great influence on lateral behavior of structures and it also affects the design of the sections, in this study, various scenarios of sudden column removal in different locations of steel structures with and without geometric irregularities in height have been investigated. The Alternate load Path Method (APM), Nonlinear Dynamic Analysis (NDA), and OpenSees software were used to investigate 10, 15 and 20-story buildings with three types of irregularity in four different column removal scenarios. The results show that increasing the irregularity in height increases the response of the structure. Also, the response of the structure to the sudden removal of columns in short buildings is greater than high-rise buildings. In other words, as the floors and elements in the buildings decreases, the potential for the progressive failure, increases.

Highlights

Progressive Collapse (PC) is the chain spread of an initial local failure from element to element resulting, eventually, in the collapse of the whole structure or a disproportionate large part of it [1, 2]
The results show that increasing the irregularity in height increases the response of the structure
Parameter Dead load Live Load Yield Stress Expected Yield Stress Modulus of Elasticity, E Poisson ratio Mass per Unit Volume moved column and the time is presented as an Nonlinear Dynamic Analysis (NDA), General Services Administration (GSA) (2003)

Summary

Introduction

Progressive Collapse (PC) is the chain spread of an initial local failure from element to element resulting, eventually, in the collapse of the whole structure or a disproportionate large part of it [1, 2]. One of the mechanisms of structural failure, which has drawn increasing attention over the past few decades, is referred to as Progressive Collapse (PC). One or several structural members suddenly fail, every load redistribution causing in turn the failure of the other structural elements and the building is progressively destroyed. Buildings must be designed so that they are capable of limiting the local failure by inte-. There have been numerous investigations regarding progressive collapse in various structures, some topics have remained overlooked one of which is the effect of irregularity in height in assessing the progressive collapse potential in mid-rise and high-rise buildings.

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Modeling and analysis

Review of analysis results

Conclusions

Examination of the results of the analysis shows