考虑高温蠕变影响的钢梁抗火性能

王卫永; 何平召

doi:10.13409/j.cnki.jdpme.2016.03.025

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考虑高温蠕变影响的钢梁抗火性能

钢结构抗火 | 更新时间：2025-12-11

- 考虑高温蠕变影响的钢梁抗火性能
- Fire Resistance of Steel Beams Considering Creep at Elevated Temperatures
- 防灾减灾工程学报 2016年36卷第3期页码：486-492
- 作者机构：
- 作者简介：
- 基金信息：
  
  中央高校基本科研业务费项目（CDJZR12200004）;重庆市自然科学基金项目（cstc2013jcyjA30010）资助
- DOI：10.13409/j.cnki.jdpme.2016.03.025
  中图分类号： U391;TU352.5
- 纸质出版：2016
- 稿件说明：
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[1]王卫永,何平召.考虑高温蠕变影响的钢梁抗火性能[J].防灾减灾工程学报,2016,36(03):486-492.

王卫永, 何平召. Fire Resistance of Steel Beams Considering Creep at Elevated Temperatures[J]. 2016, 36(3): 486-492.
[1]王卫永,何平召.考虑高温蠕变影响的钢梁抗火性能[J].防灾减灾工程学报,2016,36(03):486-492. DOI： 10.13409/j.cnki.jdpme.2016.03.025.

王卫永, 何平召. Fire Resistance of Steel Beams Considering Creep at Elevated Temperatures[J]. 2016, 36(3): 486-492. DOI： 10.13409/j.cnki.jdpme.2016.03.025.

摘要

钢材在高温和荷载作用下产生明显蠕变变形

影响火灾中钢梁的变形和受力性能。为了定量确定高温蠕变对钢梁抗火承载力的影响

建立了考虑高温蠕变的钢梁有限元分析模型。采用约束钢梁抗火试验数据对模型进行了验证

结果吻合较好。进而采用该模型对钢梁在火灾下的承载力进行了分析

得到了钢梁的抗火承载力与温度和时间的关系

并提出了钢梁高温承载力实用计算方法。研究表明:钢材的高温蠕变对钢梁抗火性能具有较大影响;钢梁在高温下承载力随时间变化十分显著;对耐火极限要求较低的钢梁

传统的高温承载力计算方法偏于保守;而对耐火极限要求较高的钢梁

传统的高温承载力计算方法偏于不安全。

Abstract

Significant creep deformation occurs in steel subjected to elevated temperatures and loading

and then affects the deformation and load capacity of steel beams in fire.In order to quantify the influence of creep at elevated temperatures on load bearing capacity of steel beams

finite element analysis model for steel beam was established by taking creep into consideration.The model was validated by test data on restrained steel columns in fire and good agreement was found.Then load bearing capacity analysis was performed for steel beams in fire by employing the calibrated model.The load capacity depending on temperature and time was obtained and the simplified calculation approach to predict the load capacity at elevated temperature was proposed.The study shows that the creep has a great effect on fire response of steel beams.The load capacity of steel beams varies significantly with temperature and time.For the steel beams with lower fire duration requirement

load capacity at elevated temperature calculated by traditional method for steel beams is conservative and for which with higher fire duration requirement

the load capacity is overestimated.

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references

球形储罐局部消应力热处理的机理与效果评价研究 [D]. 王泽军. 天津大学 2007

CECS 200-2006. 建筑钢结构防火技术规范 [S]. 2006

钢结构及钢-混凝土组合结构抗火设计[M]. 中国建筑工业出版社 , 李国强等著, 2006

Effect of high temperature creep on the fire response of restrained steel beams [J] . V. K. R. Kodur,M. M. S. Dwaikat. Materials and Structures . 2010 (10)

Experiment on restrained steel beams subjected to heating and cooling [J] . Guo-Qiang Li,Shi-Xiong Guo. Journal of Constructional Steel Research . 2007 (3)

Parametric analysis of the lateral–torsional buckling resistance of steel beams in case of fire [J] . Fire Safety Journal . 2007 (6)

Experimental and numerical research on the critical temperature of laterally unrestrained steel I beams [J] . L.M.R. Mesquita,P.A.G. Piloto,M.A.P. Vaz,P.M.M. Vila Real. Journal of Constructional Steel Research . 2005 (10)

Numerical simulations of the effects of non-uniform temperature distributions on lateral torsional buckling resistance of steel I-beams [J] . Y.Z. Yin,Y.C. Wang. Journal of Constructional Steel Research . 2003 (8)

A new proposal of a simple model for the lateral-torsional buckling of unrestrained steel I-beams in case of fire: experimental and numerical validation [J] . P.M.M Vila Real,P.A.G Piloto,J.-M Franssen. Journal of Constructional Steel Research . 2002 (2)

Experimental investigation of behaviour of axially restrained steel beams in fire [J] . T.C.H Liu,M.K Fahad,J.M Davies. Journal of Constructional Steel Research . 2002 (9)

Stress-Strain-Temperature Relationship for Structural Steel [J] . K. W. Poh. Journal of Materials in Civil Engineering . 2001 (5)

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