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Elasto-Plastic Analysis of Concrete-Filled Circular Steel Tube Stub Columns After Constant High Temperature(PDF)

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

Issue:
2006年01期
Page:
34-38
Research Field:
Publishing date:
2006-03-20

Info

Title:
Elasto-Plastic Analysis of Concrete-Filled Circular Steel Tube Stub Columns After Constant High Temperature
Author(s):
DING Fa-xing;  YU Zhi-wu
School of Civil Engineering and Architecture, Central South University, Changsha 410075, Hunan, China
Keywords:
concrete-filled steel tube;  stress-strain relationship;  elasto-plastic analysis;  constant high temperature
PACS:
TU528.59
DOI:
-
Abstract:
Based on the research of the mechanical properties of concrete at uniaxial compression and steel at uniaxial tension after constant high temperature, the axisymmetric triaxial compressive stress-strain relationships of concrete and multiaxial stress-strain relationships of steel after constant high temperatures were suggested. Based on continuum mechanics, the mechanical model of concentric cylinders of circular steel tube with concrete core of entire section loaded after constant high temperature was determined. Applying elasto-plastic analysis method, theoretical calculation formulas for composite elastic modulus and composite stress-strain relationships of concrete-filled circular steel tube(CFST)stub columns were proposed and a FORTRAN program was developed, and the load-axial strain relationships of CFST stub columns after constant high temperatures were analyzed. The analysis results are in reasonable agreement with the experiment ones.

References:

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Memo

Memo:
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Last Update: 2006-03-20