Complete collapse behavior of braced structures with bending buckling for mega ground motion
Project/Area Number |
16K06574
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Building structures/Materials
|
Research Institution | Osaka University |
Principal Investigator |
TADA Motohide 大阪大学, 工学研究科, 教授 (90216979)
|
Project Period (FY) |
2016-04-01 – 2020-03-31
|
Project Status |
Completed (Fiscal Year 2019)
|
Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
|
Keywords | 筋違い / 曲げ座屈 / 局部座屈 / 筋違 / 引張破断 / 建築構造・材料 / 構造工学・地震工学 / 解析・評価 / 耐震 |
Outline of Final Research Achievements |
Braced structures designed by Building Standard Law were numerically analyzed for mega earthquake ground motion to estimate the ultimate capacity against the complete collapse. The results show that the structures completely collapse by 2.8-5.5 times earthquake that was specified as an extremely rare ground motion. Aiming to improve analysis technology, the mechanical models for large deformation cyclic behavior were developed. Targets are rectangular tube column and H-shaped column that buckles locally due to axial force and biaxial bending, H-shaped beam that buckles locally due to bending moment, and H-shaped brace that repeats bending buckling and tensile yielding.
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Academic Significance and Societal Importance of the Research Achievements |
建築基準法は最低守られるべき必要条件であるにもかかわらず,法が要求するクライテリアだけに基づいた画一的な構造安全性のチェックが長年にわたって行われてきた。法が担保するのは震度V弱程度の中地震に対して建物が無損傷,震度VI強程度の大地震に対して建物がある程度の損傷に留まることである。しかし,最も大切な構造性能は,発生の可能性が低くともゼロではない超大地震に対して建物を倒壊させないことであろう。 本研究で得られた成果から,建築基準法に則って設計した建物が,完全倒壊に至るまでの余裕度を定量的に把握することができた。また,その評価制度をさらに向上させるための数値解析技術も提案することができた。
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Report
(5 results)
Research Products
(35 results)