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Effect of Heating and Cooling on Axially Restrained RC Columns with Special- Shaped Cross Section

机译:加热和冷却对具有异形截面的轴向约束RC柱的影响

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摘要

This paper describes the performance of 12 axially restrained RC columns (four for each type of cross section, i.e., +-, T- and L-shaped cross section) under fire conditions that were recently finished in South China University of Technology. The main objective of the paper is to investigate the effect of axial restraint on RC columns during both expanding and contracting phases. The RC columns were all initially concentrically loaded and subjected to ISO834 standard fire on all sides. Axial restraints were imposed at the top of the columns to simulate the restraining effect of the rest of the whole frame. Different degrees of axial restraint were obtained by varying the length of the restraining beam. The boundary conditions of the columns were considered as fixed-fixed for all tests. It is found that restrained RC columns behave quite differently to isolated ones. No typical 'runaway' failure of isolated RC columns was observed in the fire test. Finally, the finite element software, SAFIR, is employed to conduct a numerical analysis of the tests.
机译:本文描述了12根受轴向约束的RC柱(每种横截面为四根,即+,T和L形横截面)在火情下的性能,这些条件最近在华南理工大学完成。本文的主要目的是研究在扩张和收缩阶段轴向约束对钢筋混凝土柱的影响。 RC柱最初全部同心加载,并且在所有侧面均经过ISO834标准防火。在圆柱顶部施加轴向约束,以模拟整个框架其余部分的约束效果。通过改变约束梁的长度可以获得不同程度的轴向约束。对于所有测试,列的边界条件都被视为固定-固定的。发现约束RC柱的行为与隔离柱的行为完全不同。在耐火测试中未观察到隔离的RC色谱柱发生典型的“失控”故障。最后,使用有限元软件SAFIR对测试进行数值分析。

著录项

  • 来源
    《Fire Technology》 |2010年第1期|231-249|共19页
  • 作者单位

    Department of Civil Engineering, South China University of Technology, 510640 Guangzhou, China;

    Department of Civil Engineering, South China University of Technology, 510640 Guangzhou, China;

    Department of Civil Engineering, South China University of Technology, 510640 Guangzhou, China;

    State Key Laboratory of Subtropical Building Science, South China University of Technology, 510640 Guangzhou, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    fire performance; RC column; special-shaped cross section; axial restraint; cooling phase;

    机译:防火性能;RC柱;异形截面;轴向约束冷却阶段;
  • 入库时间 2022-08-18 00:13:10

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