|Table of Contents|

Effect of Axial Restraint on Fire Resistance Performance of Steel Column(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2006年04期
Page:
64-
Research Field:
Publishing date:
2006-12-20

Info

Title:
Effect of Axial Restraint on Fire Resistance Performance of Steel Column
Author(s):
JI Lin;  ZHAO Jun-hai;  ZHAI Yue;  LI Xin-zhong
School of Architectural Engineering, Chang'an University, Xi'an 710061, Shaanxi, China
Keywords:
steel structure;  fire resistance performance;  axial restraint;  finite element method
PACS:
TU392.1
DOI:
-
Abstract:
Authors investigated the axial restraint on fire resistance of unprotected steel column with commercial finite element method(FEM)software MSC MARC Mentat. The effect of axial restraint stiffness on fire resistance of steel column was analyzed. The FEM analysis results were fairly close to test results. The results show that although raising axial restraint stiffness can benefit bearing capacity of steel column in ambient temperature condition; in fire condition, fire resistance of steel column decreases as restraint stiffness increases. Under the fire condition, the reduction of elastic modulus and thermal expansion of column result in the decrease of bearing capacity before the temperature arrives at 450 °C; after temperature exceeds 450 °C, the yield strength of steel begins to decrease and the high temperature leads to high reaction of axial restraint, finally, it leads to the column collapse in fire.

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Last Update: 2006-12-20