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，多层框架在一层竖向倒塌后的行为有两种情况。一种是倒塌进行到一定程度，然后停止，另一种是倒塌继续进行，直到所有的故事都完全倒塌。在后一种情况下的倒塌被称为连续倒塌，这是一个不稳定的现象，导致的重力荷载的框架。试验参数为细长比和宽厚比。阐明了钢柱在大变形范围内的后屈曲行为，并推导了荷载-轴向变形关系。利用这些关系，对多质量体系模型的竖向动力响应进行数值分析，研究钢结构建筑的连续倒塌，通过比较层倒塌释放的重力势能与柱在完全倒塌前因压缩载荷而吸收的能量，阐明了层抵抗连续倒塌的框架条件。

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

Progressive Collapse in Multi-Story Steel Frames, Part 1. Frame Conditions to Arrest Progressive Collapse

多层钢框架的渐进式倒塌，第 1 部分：阻止渐进式倒塌的框架条件

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