Fire resistance of concrete-filled steel tubular column to composite beam frames with blind bolted connections

Fire Science and Technology ›› 2020, Vol. 39 ›› Issue (9): 1206-1210.

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Fire resistance of concrete-filled steel tubular column to composite beam frames with blind bolted connections

XIANG Kai¹, QU Yi-ming², PAN Yan-chong¹, SONG Tian-yi³

1. Tianjin Fire Science and Technology Research Institute of MEM, Tianjin 300381, China；2. Xicheng Fire and Rescue Division（of Beijing）, Beijing 100009, China; 3. College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China

Online:2020-09-15 Published:2020-09-15

Abstract

Abstract: In order to clarify fire performance of concrete filled steel tubular (CFST) column to composite beam frames with blind bolted connections, the finite element method was used to analyze the temperature field and fire resistance limit of circular CFST column to composite beam frames with blind bolted connections. The fire condition was ISO 834 standard heating curve. The research results show that the simplified blind bolted model could effectively analyze the fire resistance of circular CFST column to composite beam frame. The meshing method of CFST column cross section had little influence on the fire resistance limit of CFST column to composite beam frame. When the blind bolt connection was reliable, the failure modes of CFST column to composite beam frame reaching the fire resistance limit were mainly column failure mode and composite beam failure mode.

Key words: concrete filled steel tubular column, composite beam, blind bolt, fire performance, numerical simulation

XIANG Kai, QU Yi-ming, PAN Yan-chong, SONG Tian-yi. Fire resistance of concrete-filled steel tubular column to composite beam frames with blind bolted connections[J]. Fire Science and Technology, 2020, 39(9): 1206-1210.

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Fire resistance of concrete-filled steel tubular column to composite beam frames with blind bolted connections

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