Journal ArticleDOI
Quantitative evaluation of progressive collapse process of steel portal frames in fire
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TLDR
In this article, the authors present quantitative investigations on the collapse behavior of steel portal frames exposed to standard fires, and the complete collapse process is divided into safe, alert, dangerous and collapse stages.About:
This article is published in Journal of Constructional Steel Research.The article was published on 2018-11-01. It has received 12 citations till now. The article focuses on the topics: Portal frame & Progressive collapse.read more
Citations
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Finite element modeling for the progressive collapse analysis of steel stiffened-plate structures in fires
TL;DR: In this paper, the authors presented new computational models for the analyses of heat transfer and fire-induced progressive collapse behavior of steel stiffened plate structures without or with passive fire protection (PFP) under lateral patch loading in fires.
Journal ArticleDOI
Experimental and numerical study on collapse modes of single span steel portal frames under fire
TL;DR: In this paper, a fire test on a scaled-down single span steel portal frame is conducted and measurements of deformation and collapse mode of the test frame are used to validate the numerical model for simulating the behavior of the single-span steel portal frames subjected to fire.
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Collapse performances of steel frames against fire considering effect of infill walls
Sidi Shan,Shuang Li +1 more
TL;DR: In this paper, the effect of infill walls on collapse performances of three-dimensional (3D) steel frames against fire using explicit nonlinear dynamic analysis was numerically investigated and two eight-story, five-span with three-bay composite steel frames were designed.
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Experimental investigation of square stainless steel tubular stub columns after elevated temperatures
Kang He,Yu Chen,Shaohua Han +2 more
TL;DR: In this article, the authors present the failure modes, ultimate loadbearing capacity, load-strain curves, load versus displacement curves, initial stiffness at the elastic stage and ductility of the specimens.
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Early-warning methods for fire-induced collapse of single span steel portal frames
Wei Ji,Guoqiang Li,Guobiao Lou +2 more
TL;DR: In this article , a three-dimensional finite element model verified by numerical simulation of physical tests was adopted to simulate the collapse behavior of steel portal frames, which indicated that the displacement and velocity of apex and eaves have a close relationship with collapse state and the collapse mode of the burning frame can be predicted through analyzing the direction of displacements.
References
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How did the WTC towers collapse: a new theory
TL;DR: In this paper, a finite-element model was used to investigate the structural stability of the World Trade Center, New York for a number of different fire scenarios, and a simple but unmistakable collapse mechanism that owes as much (or more) to the geometric thermal expansion effects as it does to the material effects of loss of strength and stiffness.
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The tensile membrane action of unrestrained composite slabs simulated under fire conditions
Colin Bailey,DS White,DB Moore +2 more
TL;DR: In this article, it was found that the composite flooring system, comprising lightweight concrete, anti-crack mesh reinforcement and steel deck, had a greater inherent fire resistance than suggested by current codified design methods.
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Tall building collapse mechanisms initiated by fire: Mechanisms and design methodology
TL;DR: In this paper, a methodology for assessing the vulnerability of tall buildings to fire on multiple floors is presented based upon numerical modelling of real and imagined tall building structures, and two potential failure mechanisms for tall buildings in multiple floor fires are described.
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Mechanical Properties of High-Strength Q690 Steel at Elevated Temperature
TL;DR: In this paper, fire resistance design of high-strength steel structures has gained more attention in recent years, and high strength steels are finding wide applications in steel-framed buildings.
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Lateral displacement and collapse of single-story steel frames in uncontrolled fires
TL;DR: In this article, the complete deformation sequence of steel frames, from initial thermal expansion, followed by either column buckling or formation of plastic hinges in the beams, to collapse was used to determine the safe clearance required between the frame and the firewall to allow the frame to expand laterally without contacting and damaging the wall.