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Nonlinear analysis of temperature field of reinforced concrete beam with three surfaces exposing to fire(PDF)

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

Issue:
2005年04期
Page:
11-14
Research Field:
Publishing date:
2006-12-20

Info

Title:
Nonlinear analysis of temperature field of reinforced concrete beam with three surfaces exposing to fire
Author(s):
YU Zhi-wu;  TANG Guo-qing;  DING Fa-xing
School of Civil Engineering and Architecture, Central South University, Changsha 410075, China
Keywords:
reinforced concrete beam;  fire;  temperature field;  finite difference;  nonlinear analysis
PACS:
TU375.1
DOI:
-
Abstract:
The finite difference equation was built by using elemental energy balance of reinforced concrete beam with three surfaces exposing to fire based on the thermal properties of concrete. The influence of the physical or chemical reaction of free or combined water in concrete on the temperature field of concrete was considered by magnifying the specific heat of concrete. The program for drawing up the nonlinear finite difference analysis of the temperature field within reinforced concrete beam with three surfaces exposing to fire was developed, and the magnifying coefficient of the specific heat of concrete and the formula for the thermal capacity of concrete were determined by matching the numerical results with experimental results from references. The results show that the calculated results accord with the experimental results and it is possible for further researches on the behaviors and fire resistance of reinforced concrete beam under fire condition.

References:

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[2] 过镇海,时旭东.钢筋混凝土的高温性能及其计算[M].北京:清华大学出版社,2003.
[3] LIE T T.A method of to predict the fire resistance of circular concrete filled hollow steel columns[J].Journal of Fire Protection Engineering,1990,2(4):111-126.
[4] Eurocode 2,General Rules-Structural Fire Design[S].
[5] HUANG Zhao-hui,ANDREW P,JOHN R.Non-linear finite element model to predict temperature histories within reinforced concrete in fires[J].Building and Environment,1996,31(2):109-118.

Memo

Memo:
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Last Update: 2006-12-20