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author:

Lin, Xiaokang (Lin, Xiaokang.) [1] | Han, Linhai (Han, Linhai.) [2]

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EI Scopus PKU CSCD

Abstract:

The load-carrying capacity and the stiffness of concrete filled circular hollow section (CHS) columns will decrease after exposure to fire, so it is necessary to assess the aseismic capacity of concrete filled steel tube (CFST) structure in seismic areas. This paper provided seven test data pertaining to the seismic behavior of concrete filled CHS columns after exposure to ISO-834 standard fire, and a numerical method was used to calculate the hysteretic lateral load (P) versus lateral displacement (Δ) relations. Based on the theoretical model, influences of the changing axial compression ratio (n), slenderness ratio (λ), steel ratio (α), yield strength of steel (fy) and compressive strength of concrete (fcu), fire duration time (t) on the lateral load versus lateral displacement skeleton curves were discussed. The results showed that the hysteretic curves of the beam-columns are in plump shapes, and have no significant pinch phenomenon after exposure to fire, but the ultimate load-carrying capacity and the elastic stiffness will decrease with the increase of the fire duration time. The achievements in this paper may be used to afford an approach to repair such structure with fire protection against earthquake after fire.

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Source :

Journal of Building Structures

ISSN: 1000-6869

CN: 11-1931/TU

Year: 2005

Issue: 3

Volume: 26

Page: 19-29

Cited Count:

WoS CC Cited Count:

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ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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