eprintid: 10204367
rev_number: 8
eprint_status: archive
userid: 699
dir: disk0/10/20/43/67
datestamp: 2025-02-06 08:48:33
lastmod: 2025-02-06 08:48:33
status_changed: 2025-02-06 08:48:33
type: article
metadata_visibility: show
sword_depositor: 699
creators_name: Sun, Yao
creators_name: Shao, Mingtao
creators_name: Cashell, Katherine
title: Postfire Residual Capacities of Aluminum Alloy Unequal-Leg Angle Sections
ispublished: pub
divisions: UCL
divisions: B04
divisions: F44
note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
abstract: This paper presents the laboratory testing, numerical modeling, and structural design of aluminum alloy unequal-leg angle sections after exposure to fire. A testing program was carried out which included heating tests, postfire material tests and unequal-leg angle stub column tests. Eight different levels of elevated temperature exposure were considered ranging from 25°C to 550°C. The testing program was supplemented by finite-element analysis, in which numerical models were developed to simulate the postfire behavior, and the test results were adopted to validate the modeling approach. Then parametric studies were conducted to develop a deeper understanding of the influence of a number of important parameters on the postfire behavior. The experimental and numerical results were compared to various international design codes, and the continuous strength method, the latter of which is the only method which accounts for the effects of strain hardening in the material in the capacity predictions. The results from the design analysis indicate that the existing international standards generally yield underpredicted postfire capacities for aluminum alloy unequal-leg angles after exposure to elevated temperatures, especially between 300°C and 550°C. The continuous strength method was shown to offer significant design improvement over the examined international codes for the postfire design of aluminum alloy unequal-leg angles, especially for stocky angles, mainly due to the consideration of postfire strain hardening.
date: 2025-03-01
date_type: published
publisher: ASCE-AMER SOC CIVIL ENGINEERS
official_url: https://doi.org/10.1061/jsendh.steng-14081
oa_status: green
full_text_type: other
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 2354229
doi: 10.1061/JSENDH.STENG-14081
lyricists_name: Cashell, Katherine
lyricists_id: KCASH63
actors_name: Cashell, Katherine
actors_id: KCASH63
actors_role: owner
funding_acknowledgements: 020100-531119200260 [Fundamental Research Funds for the Central Universities]
full_text_status: public
publication: Journal of Structural Engineering
volume: 151
number: 3
article_number: 04024224
pages: 12
issn: 0733-9445
citation:        Sun, Yao;    Shao, Mingtao;    Cashell, Katherine;      (2025)    Postfire Residual Capacities of Aluminum Alloy Unequal-Leg Angle Sections.                   Journal of Structural Engineering , 151  (3)    , Article 04024224.  10.1061/JSENDH.STENG-14081 <https://doi.org/10.1061/JSENDH.STENG-14081>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10204367/1/Sun%20et%20al%20%282025%29%20Postfire%20Residual%20Capacities%20of%20Aluminum%20Angle.pdf