5-7 December 2018 - Hong Kong, China

CONFERENCE PAPERS

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


PROGRESSIVE COLLAPSE RESISTANCE OF STEEL FRAMED BUILDINGS UNDER EXTREME EVENTS

 

G.Q. Li 1, J.Z. Zhang 2, L.L. Li 2, B.H. Jiang 3, T.C. Yang 4 and J. Jiang 5*

1 State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai, China

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2 College of Civil Engineering, Tongji University, Shanghai, China

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3 School of Civil Engineering, Central South University, Changsha, China

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4 School of Civil Engineering and Architecture, University of Jinan, Jinan, China;

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5 Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, MD, USA.

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(*Corresponding Author)

DOI:10.18057/ICASS2018.K.01

ABSTRACT:

This paper presents experimental and theoretical investigations on the progressive collapse behavior of steel framed buildings subject to extreme loads such as blast, impact, and fire. A new bearing capacity-based index is proposed to quantify the robustness of structures. An energy-based theoretical model is also proposed to quantify the effect of reinforced concrete slabs on the collapse resistance of structures. The experimental results show that the dynamic amplification factors of frames subject to impact or blast are much smaller than the conventional value of 2.0. The collapse process of frames in fire can be either static or dynamic depending on the restraint conditions and load levels. It is important to consider the failure time and residual strength of blast-exposed columns for assessing the collapse resistance of structures subject to explosion. Two collapse modes of steel frames under blast or impact are found: connection-induced collapse mode and column-induced collapse mode. In case of fire, a frame may collapse due to either column buckling or pull-in effect of beams. The energy dissipation due to the elongation of slab reinforcement and additional resultant bending moment considerably contributes to the collapse resistance of structures.

Keywords:

Progressive Collapse; Steel Framed Building; Blast; Impact; Fire; Experimental Study; Theoretical Study

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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