• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of structural fire engineering >Performance of Axially Restrained Hollow and Concrete Filled Oval Steel Columns Subjected to Hydrocarbon Fire
【24h】

Performance of Axially Restrained Hollow and Concrete Filled Oval Steel Columns Subjected to Hydrocarbon Fire

机译：受碳氢化合物腐蚀的空心钢管混凝土空心圆柱的性能

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper represents the outcomes of the first research in the world involving experimental and validated theoretical study to investigate the performance of axially restrained steel columns with hollow and concrete filled elliptical sections subjected to fire. The test programme involved 9 hollow and concrete filled columns with 200 x 100 x 8 mm oval section yielding a slenderness λ = 51 and tested under the severe hydrocarbon fire curve. The 1800 mm columns were tested under loading ratios = 0.2, 0.4 and 0.6 of the ultimate strength. The paper presents the obtained experimental results including measured axial and lateral displacements, restraint forces and failure time. A three-dimensional model was built using the finite element method (FEM) and was validated using the obtained tests results. By using variable with temperature thermal expansion coefficient and the EC3 thermal parameters, the finite element model demonstrated an excellent agreement with test results of failure temperatures, failure modes, axial displacements and generated axial forces. The verified finite element model was used to conduct a parametric analysis involving a range of parameters of loading level and slenderness. The study has shown that the concrete filled sections have demonstrated an improved fire resistance when compared to the hollow sections under low loading ratios. The research indicates that imposing axial restraint has reduced the fire resistance of columns by approximately one third on the time domain. The study has also shown a non-linear relationship between the loading ratio and slenderness of elliptical columns and that the load ratio has more effect on fire resistance of columns with high slenderness.
机译：本文代表了世界上第一个涉及实验和经过验证的理论研究的结果，这些研究旨在研究带有空心和混凝土填充椭圆形截面的受火灾约束的轴向约束钢柱的性能。该测试程序涉及9个空心和混凝土填充柱，其椭圆形截面为200 x 100 x 8 mm，产生的细长度为λ= 51，并在严重的烃着火曲线下进行了测试。在极限强度的加载比= 0.2、0.4和0.6的条件下测试1800 mm色谱柱。本文介绍了获得的实验结果，包括测量的轴向和横向位移，约束力和失效时间。使用有限元方法（FEM）建立了三维模型，并使用获得的测试结果对其进行了验证。通过使用具有温度热膨胀系数和EC3热参数的变量，有限元模型显示出与故障温度，故障模式，轴向位移和产生的轴向力的测试结果极好的一致性。经过验证的有限元模型用于进行参数分析，其中涉及一系列载荷水平和细长度参数。研究表明，与低荷载比的空心型材相比，混凝土填充型材具有更高的耐火性。研究表明，施加轴向约束会在时域上将立柱的耐火性降低约三分之一。研究还表明，椭圆柱的载荷比与细长度之间存在非线性关系，载荷比对细长柱的耐火性影响更大。

著录项

  • 来源
    《Journal of structural fire engineering》 |2012年第2期|p.181-197|共17页
  • 作者

    F. Ali; A. Jeffers; N. Goodfellow; A. Nadjai; T. Scullion; J. Gardner;

  • 作者单位

    FireSERT, School of the Built Environment, University of Ulster, UK;

    Civil and Environmental Engineering, University of Michigan, Ml 48109-2125, USA;

    FireSERT, School of the Built Environment, University of Ulster, UK;

    FireSERT, School of the Built Environment, University of Ulster, UK;

    FireSERT, School of the Built Environment, University of Ulster, UK;

    Jeremy Gardner Associates, 11 Risborough Street, London, UK;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号