Theoretic Model and Simplified Calculation Method of Fire Resistance of Partially Encaed Concrete（PEC） Columns

毛小勇; 徐悦军; 行盼娟

doi:10.13409/j.cnki.jdpme.2012.01.008

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Theoretic Model and Simplified Calculation Method of Fire Resistance of Partially Encaed Concrete（PEC） Columns

更新时间：2025-12-11

- Theoretic Model and Simplified Calculation Method of Fire Resistance of Partially Encaed Concrete（PEC） Columns
- Vol. 32, Issue 1, Pages: 45-49(2012)
- 作者机构：
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- DOI：10.13409/j.cnki.jdpme.2012.01.008
  CLC： U398.9
- Published：2012
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[1]毛小勇,徐悦军,行盼娟.标准升温条件下PEC柱耐火极限理论分析及简化计算[J].防灾减灾工程学报,2012,32(01):45-49.

毛小勇, 徐悦军, 行盼娟. Theoretic Model and Simplified Calculation Method of Fire Resistance of Partially Encaed Concrete（PEC） Columns[J]. 2012, 32(1): 45-49.
[1]毛小勇,徐悦军,行盼娟.标准升温条件下PEC柱耐火极限理论分析及简化计算[J].防灾减灾工程学报,2012,32(01):45-49. DOI： 10.13409/j.cnki.jdpme.2012.01.008.

毛小勇, 徐悦军, 行盼娟. Theoretic Model and Simplified Calculation Method of Fire Resistance of Partially Encaed Concrete（PEC） Columns[J]. 2012, 32(1): 45-49. DOI： 10.13409/j.cnki.jdpme.2012.01.008.

摘要

基于ABAQUS软件建立了标准升温条件下局部填充混凝土（Partially Encaed Concrete

简称PEC）柱抗火性能分析的有限元模型

计算了火灾下PEC柱的变形曲线及耐火极限

计算结果得到了已有试验数据的验证。利用上述模型分析了截面几何参数、材料物理参数、荷载比及偏心率等因素对耐火极限的影响。在参数分析的基础上

建立了标准升温条件下PEC耐火极限简化计算方法。结果表明:无耐火保护PEC柱的耐火极限一般达不到现有抗火标准的要求;荷栽比、长细比和截面周长是影响PEC柱耐火极限的主要因素;该耐火极限简化计算方法可供工程设计参考。

Abstract

Based on ABAQUS software

3-D finite element model was established to calculate the mechanical performances and fire resistance of PEC columns exposed to standard ISO-834 fire.The calculated deformation curves and fire resistance of PEC columns were validated by the test results.The validated model was then been used to analysis the influence of related factors on fire resistance.Simplified calculation method was established based on the aforementioned parametric study.It can be seen from the research results that fire resistance of PEC columns without any insulation may not meet the demand of current provision. Essential factors related to fire resistance are load ratio

slenderness and circumference of column section.The simplified calculation method suggested in this paper can be used as a reference for fire resistance design of PEC columns.

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references

部分包裹混凝土偏心受压短柱受力性能试验研究 [J]. 赵根田,郝志强,朱晓娟,李鹏宇. 内蒙古科技大学学报 . 2008(02)

高温下砼的强度和变形性能试验研究 [J]. 李卫,过镇海. 建筑结构学报 . 1993(01)

PEC柱抗火性能及设计方法研究 [D]. 徐悦军. 苏州科技学院 2011

Finite-Element Modeling of Partially Encased Composite Columns Using the Dynamic Explicit Method [J] . Mahbuba Begum,Robert G. Driver,Alaa E. Elwi. Journal of Structural Engineering . 2007 (3)

Behavior and Strength of Partially Encased Composite Columns with Built-up Shapes [J] . Thierry Chicoine,Robert Tremblay,Bruno Massicotte,James M. Ricles,Le-Wu Lu. Journal of Structural Engineering . 2002 (3)

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