5-7 December 2018 - Hong Kong, China

CONFERENCE PAPERS

Ninth International Conference on Advances in Steel Structures (ICASS 2018)


THE STRUCTURAL BEHAVIOR OF A PORTAL FRAME BUILDING SUBJECTED TO A LOCALIZED FIRE

 

Er-feng Du *, Gan-ping Shu, Xiao Lv and Le Qin

 School of Civil Engineering, Southeast University , Nanjing, China

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DOI:10.18057/ICASS2018.P.144

ABSTRACT:

An experimental investigation was conducted on a 3D steel portal frame structure subjected to a localized fire. The results indicate that the largest deformation occurs in the steel beam above the fire source during the cooling phase, and the recovery is negligible after fire. The beam deformation is symmetrical with each end having an inflection point. The eaves of the portal frame above the fire source and the ridge of the gable move outwards due to the thermal expansion during the heating phase, whereas they are pulled in on the cooling stage. Both global instability and local buckling are observed in the purlins above the fire. The rigid tie bar deflects downward evidently in the fire region, and the members between the eaves buckle due to restrained thermal elongation in the central building. The compression member of the roof bracing ceases to be effective in both out spans. No damage is found in the steel columns, the member-to-member connections and the column bases. The integral structure keeps safe due to the mutual effect of the whole system.

Keywords:

Fire test; Portal frame; Structural system; Temperature; Deformation; Localized fire

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IMPORTANT DATES

First call for paper:
1 January 2018
Abstract submission: (CLOSED)
1 April 2018
Notification of abstract acceptance:
on or before 16 April 2018 
Full paper submission: 
15 July 2018
Online Registration Begins:
1 August 2018
Notification of full paper acceptance:
31 August 2018
Early bird registration:
on or before 7 September 2018
Online Registration Closes:
31 October 2018
Announcement of programme:
1 November 2018
ICASS2018 December 05, 2018 08:00 AM Time's Up