Numerical Analysis of Restrained Continuous Steel Columns under Standard Fire

IF 3 3区农林科学 Q2 ECOLOGY

Fire-Switzerland Pub Date : 2023-08-24 DOI:10.3390/fire6090330

J. Sun, Fanqin Meng, K. Andisheh, G. Clifton

{"title":"Numerical Analysis of Restrained Continuous Steel Columns under Standard Fire","authors":"J. Sun, Fanqin Meng, K. Andisheh, G. Clifton","doi":"10.3390/fire6090330","DOIUrl":null,"url":null,"abstract":"The steel column performance in realistic structures during a fire has yet to be fully understood because existing research emphasizes single-story performance, thereby disregarding the influence of continuous steel columns in multi-story configurations devoid of fire. This paper presents a numerical study to comprehend the overall structural fire performance of continuous steel columns, considering the effect of loading ratios, restraint ratios, column continuity, and single-sided lateral moments. An advanced numerical model was initially developed using ABAQUS and validated against experimental tests. The validated numerical model was subsequently employed to investigate the effects of several parameters, including axial restraint ratios (α = 0.05–0.35) and axial load ratios (n = 0.3–0.8). The study findings indicated that the restraint ratios within the designed range have a slightly beneficial impact on the fire resistance of continuous steel columns. The column continuity did not exert a significant impact on the performance of steel columns in fire. Additionally, the comparison showed that the current design approach in EN 1993-1-2 was conservative for predicting the limiting temperature of internal and edge columns.","PeriodicalId":36395,"journal":{"name":"Fire-Switzerland","volume":null,"pages":null},"PeriodicalIF":3.0000,"publicationDate":"2023-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Fire-Switzerland","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.3390/fire6090330","RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ECOLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

The steel column performance in realistic structures during a fire has yet to be fully understood because existing research emphasizes single-story performance, thereby disregarding the influence of continuous steel columns in multi-story configurations devoid of fire. This paper presents a numerical study to comprehend the overall structural fire performance of continuous steel columns, considering the effect of loading ratios, restraint ratios, column continuity, and single-sided lateral moments. An advanced numerical model was initially developed using ABAQUS and validated against experimental tests. The validated numerical model was subsequently employed to investigate the effects of several parameters, including axial restraint ratios (α = 0.05–0.35) and axial load ratios (n = 0.3–0.8). The study findings indicated that the restraint ratios within the designed range have a slightly beneficial impact on the fire resistance of continuous steel columns. The column continuity did not exert a significant impact on the performance of steel columns in fire. Additionally, the comparison showed that the current design approach in EN 1993-1-2 was conservative for predicting the limiting temperature of internal and edge columns.

查看原文本刊更多论文

标准火灾作用下约束连续钢柱的数值分析

由于现有研究强调单层结构的性能，从而忽略了在没有火灾的多层结构中连续钢柱的影响，因此火灾期间现实结构中的钢柱性能尚未得到充分理解。本文对连续钢柱的整体结构防火性能进行了数值研究，考虑了荷载比、约束比、柱连续性和单侧弯矩的影响。最初使用ABAQUS开发了一个先进的数值模型，并通过实验测试进行了验证。随后采用经过验证的数值模型研究了几个参数的影响，包括轴向约束比（α=0.05-0.35）和轴向荷载比（n=0.3-0.8）。研究结果表明，设计范围内的约束比对连续钢柱的耐火性能有轻微的有利影响。柱的连续性对钢柱在火灾中的性能没有显著影响。此外，比较表明，EN 1993-1-2中的现行设计方法在预测内柱和边柱的极限温度方面是保守的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Fire-Switzerland Multiple-

CiteScore

3.10

自引率

15.60%

发文量

182

审稿时长

11 weeks