A Study on Progressive Collapse of Multi-story Steel Frame

多层钢框架连续倒塌研究

• 批准号: 17560514
• 负责人: MINAMI Susumu
• 金额: $ 2.05万
• 依托单位: Tokyo Metropolitan University
• 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
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17560514/
• 关键词: Steel Frame; Progressive Collapse; Post-bucking Behavior; Steel Column; Load-Displacement Relation; Energy Absorption Capacity; Inelastic Collision; Dynamical Buckling Length; 衝突モデル; 崩壊条件; 座屈後残存耐力; 弾塑性応答解析

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.

由于爆炸或地震等事件而导致一层垂直倒塌后，多层框架的行为有两种情况。一种是崩溃进行到一定程度然后停止，另一种是崩溃不断进行，直到所有故事完全崩溃。后一种情况下的倒塌称为渐进式倒塌，是框架重力荷载作用下产生的一种不稳定现象。本研究对箱型钢柱进行轴压试验直至完全倒塌。测试参数为长细比和宽厚比。阐明了钢柱在大变形范围内的屈曲行为，并通过实验推导了荷载-轴向变形关系。利用这些关系，对多质量系统模型的竖向动力响应进行数值分析，以研究钢结构建筑的连续倒塌。通过比较钢结构建筑释放的重力势能，阐明了楼层抵抗连续倒塌的框架条件。在由于压缩载荷而完全倒塌之前，楼层会因柱吸收的能量而倒塌。

项目成果

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

• 发表时间: 2007
• 期刊: 第77回日本建築学会関東支部2006年度研究報告集 I
• 作者: 羽田和樹;山崎真司;見波 進
• 通讯作者: 見波 進

Study on Progressive Collapse in Multi-Story Steel Frames

多层钢框架连续倒塌研究

• 发表时间: 2006
• 期刊: Summaries of Technical Papers of Annual Meeting(AIJ) C-1
• 作者: Kazuki HANEDA;Shinji YAMAZAKI;Susumu MINAMI
• 通讯作者: Susumu MINAMI

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

• 发表时间: 2007
• 期刊: Proceeding of the 77th Architectural Research Meetings, 2006, Kanto Chapter(Architectural Institute of Japan) I
• 作者: Kazuki HANEDA;Shinji YAMAZAKI;Susumu MINAMI
• 通讯作者: Susumu MINAMI

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

• 发表时间: 2007
• 期刊: 第77回日本建築学会関東支部2006年度研究報告集 I
• 作者: 見波 進;山崎 真司;羽田 和樹
• 通讯作者: 羽田 和樹

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

• 发表时间: 2005
• 期刊: 日本建築学会大会学術講演梗概集 C-1分冊
• 作者: 見波 進;山崎真司;今村悠大
• 通讯作者: 今村悠大