A Study on Progressive Collapse of Multi-story Steel Frame

多层钢框架连续倒塌研究

基本信息

  • 批准号:
    17560514
  • 负责人:
  • 金额:
    $ 2.05万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
  • 财政年份:
    2005
  • 资助国家:
    日本
  • 起止时间:
    2005 至 2006
  • 项目状态:
    已结题

项目摘要

There are two cases of behavior of multistory frames after the vertical collapse of one story which occurs due to an event such as an explosion or an earthquake. One is where the collapse proceeds to a certain extent and then ceases and the other is where the collapse continuously progresses until all stories have completely collapsed. The collapse in the latter case is called progressive collapse which is an unstable phenomenon resulting from the gravity load of frames.In this study, axial compression tests were carried out on box-section steel columns until complete collapse. The test parameters were the slenderness ratio and width-thickness ratio. The post-buckling behaviour of the steel columns for a large deformation range was clarified, and the load-axial deformation relationships were derived experimentally. Using these relationships, numerical analysis of the vertical dynamic response of multi-mass system models was performed to investigate the progressive collapse of steel buildings.The study clarified the frame conditions which enable stories to resist progressive collapse through comparing the gravity potential energy released by the story collapse with the energy which columns absorb before they completely collapse due to the compressive load.
在一个故事的垂直崩溃之后,由于发生爆炸或地震等事件而发生的多层框架行为有两种情况。一个是崩溃在一定程度上进行的地方,然后停止,另一个是崩溃不断发展的地方,直到所有故事完全崩溃为止。后一种情况下的塌陷称为渐进式塌陷,这是由于框架的重力负载而导致的一种不稳定的现象。在这项研究中,轴向压缩测试是在盒子截面钢柱上进行的,直到完全塌陷。测试参数是细长比率和宽度厚度比。阐明了用于大变形范围的钢柱的弯曲后行为,并通过实验得出了载荷 - 轴变形关系。使用这些关系,对多质量系统模型的垂直动态响应进行了数值分析,以研究钢结构的进行性崩溃。该研究阐明了框架条件,使故事能够通过比较故事崩溃的重力势能与能量与能量的重力势崩溃,从而抵抗渐进式崩溃,这些能量由于压缩负荷而完全塌陷,这些能量是吸收的。

项目成果

期刊论文数量(15)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
鋼構造多層骨組における進行性崩壊 その2 動的解析結果
多层钢框架的渐进倒塌第 2 部分动力分析结果
Study on Progressive Collapse in Multi-Story Steel Frames
多层钢框架连续倒塌研究
Progressive Collapse in Multi-Story Steel Frames, Part 2. Results of Dynamic Analysis
多层钢框架的渐进倒塌,第 2 部分:动力分析结果
鋼構造多層骨組における進行性崩壊 その1 進行性崩壊の停止条件および動的解析モデルの検討
多层钢框架的连续倒塌第1部分停止条件检验和连续倒塌动力分析模型
完全崩壊する鋼柱の座屈後挙動
完全倒塌钢柱的后屈曲行为
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MINAMI Susumu其他文献

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{{ truncateString('MINAMI Susumu', 18)}}的其他基金

Ultimate fracture performance of steel hysteresis dampers in damage control structures
损伤控制结构中钢磁滞阻尼器的极限断裂性能
  • 批准号:
    21560597
  • 财政年份:
    2009
  • 资助金额:
    $ 2.05万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)

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