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首页> 外文期刊>Magazine of Concrete Research >Collapse resistance of RC beam-slab subassemblies due to column loss at large deflections
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Collapse resistance of RC beam-slab subassemblies due to column loss at large deflections

机译：大挠度下柱损耗引起的RC梁板组件的抗塌陷性

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摘要

This paper proposes an energy-based method to theoretically determine the collapse resistance of reinforced-concrete (RC) beam-slab subassemblies subject to a middle column loss at large deflection. It considers the contributions to internal energy dissipation due to extension of rebar in the slab and beams, the additional resultant bending moment from membrane forces in the slab and catenary tensile forces in beams, and the sectional bending moment at plastic hinges of beams and along yield lines of slabs. Furthermore, the effect of tensile forces on the sectional bending moment of the slab and beams is also accounted for. The effectiveness and accuracy of the proposed method are validated against available test results. The proposed method is found to produce accurate predictions on the collapse resistance of the subassemblies, as well as capture the main feature of mechanism of the subassembly at large deflections. It is concluded that the energy dissipation due to the extension of rebar and additional resultant bending moment significantly contribute to the resistance of subassemblies at large deflections. The interaction between membrane forces and bending moment of the beam and slab sections has a detrimental effect on the collapse resistance. Neglecting this effect will overestimate the collapse resistance for the subassembly.
机译：本文提出了一种基于能量的方法，可从理论上确定在大挠度下承受中柱损失的钢筋混凝土（RC）梁-板子组件的抗倒塌能力。它考虑了由于板坯和梁中钢筋的延伸，板坯中的膜力和梁中的悬链拉伸力而产生的附加合力弯矩，梁的塑料铰链处的截面弯曲矩以及沿屈服而对内部能量耗散的贡献。平板线。此外，还考虑了拉力对平板和梁截面弯矩的影响。针对现有测试结果验证了所提方法的有效性和准确性。发现所提出的方法能够对子组件的抗倒塌性产生准确的预测，并捕获大挠度下子组件的机理的主要特征。结论是，由于钢筋的延伸和附加的弯曲力矩而导致的能量耗散显着提高了大挠度下组件的抵抗力。薄膜力与梁和平板截面的弯矩之间的相互作用对抗倒塌性有不利影响。忽略这种影响将高估组件的抗塌陷性。

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  • 来源
    《Magazine of Concrete Research》 |2019年第12期|647-663|共17页
  • 作者

    Zhang Jing-Zhou; Li Guo-Qiang; Jiang Jian;

  • 作者单位

    Tongji Univ, Coll Civil Engn, Shanghai, Peoples R China;

    Tongji Univ, Coll Civil Engn, Shanghai, Peoples R China|Tongji Univ, State Key Lab Disaster Reduct Civil Engn, Shanghai, Peoples R China;

    Natl Inst Stand & Technol, Engn Lab, Gaithersburg, MD 20899 USA;

  • 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

    loads loading; slabs plates; structural analysis;

    机译：荷载与荷载;板与板;结构分析;

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