eprintid: 10188923
rev_number: 7
eprint_status: archive
userid: 699
dir: disk0/10/18/89/23
datestamp: 2024-03-13 15:43:33
lastmod: 2024-03-13 15:43:33
status_changed: 2024-03-13 15:43:33
type: article
metadata_visibility: show
sword_depositor: 699
creators_name: Possidente, Luca
creators_name: Freddi, Fabio
creators_name: Tondini, Nicola
title: Dynamic increase factors for progressive collapse analysis of steel structures considering column buckling
ispublished: pub
divisions: UCL
divisions: B04
divisions: C05
divisions: F44
keywords: Dynamic increase factor, Progressive collapse, Steel structures, Column buckling, Robustness
note: © 2024 The Author(s). Published by Elsevier Ltd. under a Creative Commons license (http://creativecommons.org/licenses/by/4.0/).
abstract: Progressive or disproportionate collapse of structures may have severe socio-economic consequences. Aiming at buildings that can withstand such events, one solution is to prevent or minimize the propagation of damage that may lead to progressive collapse by means of robust design strategies. As a typical approach to model progressive collapse and assess robustness, the Alternate Path Method (APM) allows for static analyses, in which the dynamic effects induced by a sudden column loss are taken into account by amplifying loads through a Dynamic Increase Factor. Current recommendations for Dynamic Increase Factors to be used within non-linear static analyses have mainly considered beam-type collapse, overlooking other failure mechanisms, e.g., column buckling. The present paper investigates the dynamic effects of steel structures subjected to progressive collapse when buckling of columns is relevant. Five low- to high-rise case study building structures are considered together with three different column loss scenarios. A numerical procedure is introduced to evaluate the Dynamic Increase Factors considering two different Engineering Demand Parameters (EDPs), suited for describing beam- and column-type mechanisms, respectively. As Dynamic Increase Factors are typically assessed by increasing the loads on all the spans (DIF), a procedure was proposed for deriving factors that apply only on the spans above the removal (DIF*), consistently with UFC guidelines. The obtained DIF and DIF* are compared with the current literature and with values recommended in the UFC guidelines, highlighting the limits of current recommendations. Relevant considerations on the derived Dynamic Increase Factors and failure mechanisms involved are provided.
date: 2024-06
date_type: published
publisher: Elsevier BV
official_url: http://dx.doi.org/10.1016/j.engfailanal.2024.108209
oa_status: green
full_text_type: pub
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 2256695
doi: 10.1016/j.engfailanal.2024.108209
lyricists_name: Freddi, Fabio
lyricists_id: FFRED33
actors_name: Freddi, Fabio
actors_id: FFRED33
actors_role: owner
full_text_status: public
publication: Engineering Failure Analysis
volume: 160
article_number: 108209
citation:        Possidente, Luca;    Freddi, Fabio;    Tondini, Nicola;      (2024)    Dynamic increase factors for progressive collapse analysis of steel structures considering column buckling.                   Engineering Failure Analysis , 160     , Article 108209.  10.1016/j.engfailanal.2024.108209 <https://doi.org/10.1016/j.engfailanal.2024.108209>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10188923/1/Possidente%20et%20al_2024_Dynamic%20increase%20factors%20for%20progressive%20collapse%20analysis%20of%20steel%20structures%20considering%20column%20buckling.pdf