Analytical Study on Effect of Floor Slab for Progressive Collapse Resistant Capacity of Steel Moment Frames

Abstract

Abstract In this study, an improved energy-based nonlinear static analysis method are proposed to be used for more accurate evaluation of progressive collapse potential of steel moment frames by reflecting the contribution of a double-span floor slab. To this end, the behavior of the double-span floor slab was first investigated by performing material and geometric nonlinear finite element analysis. A simplified energy-absorbed analytical model by idealizing the deformed shape of the double-span floor slab was developed. It is shown that the proposed model can easily be utilized for modeling the axial tensile force and strain energy response of the double-span floor slab under the column-removal scenario. Keywords :Progressive collapse, floor slab, finite element analysis, axial tensile force, simplified method † Corresponding author: Tel: +82-31-250-1152; E-mail: corea13@snu.ac.krReceived November 15 2013; Revised January 17 2014;Accepted February 5 2014Ⓒ2014 by Computational Structural Engineering Institute of KoreaThis is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License(http://creativecommons. org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.