FIRE RESISTANCE ANALYSIS OF CONCRETE-FILLED SQUARE STEEL TUBULAR COLUMNS

YU Jinghai; ZHAO Siyu; YAN Mingting; LI Luchuan; YAN Xiangyu

doi:10.13204/j.gyjz202005024

Volume 50 Issue 5

Jul. 2020

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YU Jinghai, ZHAO Siyu, YAN Mingting, LI Luchuan, YAN Xiangyu. FIRE RESISTANCE ANALYSIS OF CONCRETE-FILLED SQUARE STEEL TUBULAR COLUMNS[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(5): 145-150,192. doi: 10.13204/j.gyjz202005024

Citation:

YU Jinghai, ZHAO Siyu, YAN Mingting, LI Luchuan, YAN Xiangyu. FIRE RESISTANCE ANALYSIS OF CONCRETE-FILLED SQUARE STEEL TUBULAR COLUMNS[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(5): 145-150,192. doi: 10.13204/j.gyjz202005024

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FIRE RESISTANCE ANALYSIS OF CONCRETE-FILLED SQUARE STEEL TUBULAR COLUMNS

doi: 10.13204/j.gyjz202005024

1. School of Civil Engineering, Tianjin University, Tianjin 300072, China;
2. Architectural Design and Research Institute of Tianjin University, Tianjin 300073, China

Received Date: 2019-11-04
Publish Date: 2020-07-14

Abstract

Abstract

The finite element analysis model of concrete-filled square steel tubular (CFST) composite columns was established by using the sequential thermo-mechanical coupling analysis method and ABAQUS finite element software, and its reliability was verified by tests. On this basis, the factors affecting the fire resistance of concrete-filled square steel tubular columns were deeply analyzed. The results showed that the section area, load ratio, slenderness ratio and the thickness of fire protection layer of concrete were important factors affecting the mechanical properties of composite columns at high temperature. Under the effective fire protection, the composite column could bear greater axial force than the circular section and square section columns, the greater the load ratio, the lower the fire resistance limit of the composite column, the more significant the effect was when axial compression ratio n<0.5.
- concrete-filled square steel tubular column,
- finite element analysis,
- temperature field,
- fire resistance

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References(19)

References

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