Progressive collapse of regular and irregular reinforced concrete moment frame

Ardian Yolanda,Zulfikar Djauhari,Enno Yuniarto,Ridwan Ridwan,M Olivia,M Infantri Yekti,A Marto,I.D Ketut Sudarsana,D Andrio,I.M Agus Ariawan,G Wibisono,D Wishart,E Saputra,G Pringgana,K Yamamoto,R Ridwan

doi:10.1051/matecconf/201927601035

Abstract

A technique to evaluate the potential progressive collapse of reinforced concrete structure was conducted in this study. The analysis involved the removal of several columns on critical location of the building according to General Services Administration (GSA) 2013 provision. In each analysis, the demand-capacity ratios (DCRs) of structural elements were examined and compared to the defined acceptance criteria. To avoid structural building collapse progressively, DCR ratio of regular and irregular buildings should be less than 2 and 1.5, respectively. The result showed that the structure did not collapse with the removal single column only. Further to this finding, several columns need to be removed so that it collapsed progressively. In the case of regular structure, progressive collapse occurred after removing five columns on the side of the regular structure, with the maximum DCR of 4.66. In the case of irregular structure, progressive collapse occurred after removing four columns on the horizontal side in the middle of structure with the maximum DCR of 3.44.

Highlights

The collapse of the World Trade Center (WTC) in New York on September, 11 2001 was extraordinary because the structure collapsed with progressive collapse
The WTC building collapsed with pancake type, which affords little opportunity to rescue because the collapse occurs very quickly
The progressive collapse in regular and irregular structures does not occur with single column deletion; progressive collapse only happens after the removal of some of the critical columns resulting from the pushover analysis

Summary

Introduction

The collapse of the World Trade Center (WTC) in New York on September, 11 2001 was extraordinary because the structure collapsed with progressive collapse. The impact of aircraft crashes that trigger fires in some buildings cause local failure of structures in the area of the plane crash. Failure of the structure gives a gradually vertical load to the floor below and leads to the progressive collapse in the building. Based on the type of collapse occurring, progressive failure is divided into pancake-type, zipper-type, domino-type, section-type, instability-type and mixed-type collapse [1]. The WTC building collapsed with pancake type, which affords little opportunity to rescue because the collapse occurs very quickly. It is in contrast to the domino type that occurs gradually that offers a more significant opportunity to save people

Objectives

Methods

Findings

Conclusion