Analysis of Fire Endurance of Reinforced Concrete Columns with Sideway

吴波; 陈海巨

doi:10.13409/j.cnki.jdpme.2017.05.023

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Analysis of Fire Endurance of Reinforced Concrete Columns with Sideway

更新时间：2025-12-11

- Analysis of Fire Endurance of Reinforced Concrete Columns with Sideway
- Vol. 37, Issue 5, Pages: 848-854(2017)
- 作者机构：
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- DOI：10.13409/j.cnki.jdpme.2017.05.023
  CLC： U352.5;TU375.3
- Published：2017
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[1]吴波,陈海巨.有侧移钢筋混凝土方柱的耐火极限分析[J].防灾减灾工程学报,2017,37(05):848-854.

吴波, 陈海巨. Analysis of Fire Endurance of Reinforced Concrete Columns with Sideway[J]. 2017, 37(5): 848-854.
[1]吴波,陈海巨.有侧移钢筋混凝土方柱的耐火极限分析[J].防灾减灾工程学报,2017,37(05):848-854. DOI： 10.13409/j.cnki.jdpme.2017.05.023.

吴波, 陈海巨. Analysis of Fire Endurance of Reinforced Concrete Columns with Sideway[J]. 2017, 37(5): 848-854. DOI： 10.13409/j.cnki.jdpme.2017.05.023.

摘要

采用结构抗火分析软件SAFIR

对独立柱与框架柱的耐火极限进行了比较

并对有侧移柱的计算模型进行了验证;针对不同的侧移因子、截面尺寸、荷载比和配筋率共240种工况

开展了有侧移方柱的耐火分析

揭示了各参数对柱耐火极限折减系数的影响规律;在此基础上

建立了有侧移方柱耐火极限的实用计算公式。研究表明:（1）柱端水平侧移较大时

框架柱的耐火极限相比独立柱明显降低;（2）随着侧移因子的增加

耐火极限折减系数逐渐减小

特别是当柱截面尺寸较大时影响更为显著;（3）随着柱截面尺寸的增加

耐火极限折减系数逐渐降低

且侧移因子越大降低速率越快;（4）随着荷载比的增加

耐火极限折减系数总体上逐渐减小

但配筋率对耐火极限折减系数的影响相对较弱。

Abstract

By using the computer program SAFIR for analysis of reinforced concrete structures in fire

a comparison between the fire endurance of frame columns and that of independent column has been conducted

and the numerical model of the column with sideway is verified.Then

the influences of lateral-displacement factor

sectional dimensions of column

axial load ratio

and reinforcement ratio on the fire resistance reduction coefficient（FRRC）of square column with sideway have been numerically studied

and a regressive formula is proposed to determine the FRRC.It is found that:（a）when the column’s sideway is large

the fire endurance of frame column is remarkable lower than that of independent column;（b）with the increasing of the lateral-displacement factor

the FRRC decreases gradually

especially when the sectional dimensions of the column is bigger

the effect of the lateral-displacement factor is more significant;（c）the FRRC reduces gradually with the increasing of the sectional dimensions of the column

and the greater the lateral-displacement factor

the faster the rate of reduction of the FRRC;and（d）with the increasing of the axial load ratio

the FRRC decreases gradually on the whole

but the effect of the reinforcement ratio on the FRRC is relatively negligible.

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references

钢筋混凝土柱的耐火极限研究 [J]. 吴波,洪洲. 自然灾害学报 . 2005(05)

钢筋混凝土框架结构抗火试验研究 [J]. 姚亚雄,朱伯龙. 同济大学学报(自然科学版) . 1996(06)

考虑柱端时变侧移的约束混凝土柱耐火性能研究 [D]. 陈筱妹. 华南理工大学 2012

Fire resistance of reinforced concrete columns with elastically restrained thermal elongation [J] . Engineering Structures . 2010 (10)

Effect of Heating and Cooling on Axially Restrained RC Columns with Special-Shaped Cross Section [J] . Bo Wu,Yi-Hai Li,Shu-Liang Chen. Fire Technology . 2010 (1)

Behaviour of axially restrained high strength concrete columns under fire [J] . Abdelaziz Benmarce,Mohamed Guenfoud. Construction and Building Materials . 2005

Outcomes of a major research on fire resistance of concrete columns [J] . Faris Ali,Ali Nadjai,Gordon Silcock,Abid Abu-Tair. Fire Safety Journal . 2004 (6)

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