| Project/Area Number |
59460152
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Building structures/materials
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| Research Institution | KUMAMOTO INSTITUTE OF TECHNOLOGY |
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Principal Investigator |
TAKEDA Jin-ichi Professor of Department of Architecture,Kumamoto Institute of Technology, 工学部, 教授 (60163408)
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| Co-Investigator(Kenkyū-buntansha) |
谷川 達彦 熊本工業大学, 工学部, 副手 (10163619)
高本 秀幸 熊本工業大学, 工学部, 講師 (40153499)
KOMOTO Hideyuki Lecturer of Department of Architecture,Kumamoto Institute of Technology
TANIGAWA Tatsuhiko Assistant of Department of Architecture,Kumamoto Institute of Technology
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| Project Period (FY) |
1984 – 1986
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| Project Status |
Completed (Fiscal Year 1986)
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| Budget Amount *help |
¥7,200,000 (Direct Cost: ¥7,200,000)
Fiscal Year 1986: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1985: ¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1984: ¥3,200,000 (Direct Cost: ¥3,200,000)
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| Keywords | Explosion / Impact / Explosion-Resistant Design / Impact-Resistant Design / Rate Effects / Primary Response / 耐衝撃構造 / 耐爆設計 / 耐衝撃設計 / 爆発実験 / 衝撃実験 / 第1次応答 / 応力波応答 / 第2次応答 / 動的弾塑性応答 / 速度効果 / 高速荷重 / ガス爆発 / 爆発事故 |
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| Research Abstract |
Unprecedented and the worst accident of Chernobyl nuclear-reactor which took place in April of last year,have taught us that important structures of same sort with nuclear facilities should be made rigidly so as to resist attacks of explosions or impacts.
Therefore,it is urgently requested to develop the design method of explosion-resistant and impact-resistant structures.
In order for the design of these structures subjected to explosion or impact,the most important step is to numerically estimate responses ( stress,strain,etc. ) of the structures. On the responses in such loadings,it is already reported by the authors that,though the responses of these structures are outstandingly multiple and complicated,they are mainly divided into two responses,one is primary responses which are due to stress waves and latter is secondary responses, elasto-plastic responses, and furthermore,these both responses are completely affected by rate effects which make changes of the relations between stress and strain concern,of the structures.
The primary responses of structures are estimated by the data obtained in adequate experiments or plastic wbve analysis which is considerably complicated.The secondary response are estimated by ordinary elasto-plastic dynamic response analysis,except for the considerations of the rate effects, mentioned above,and preceeding fractures due to primary responses.
There are some unfavorable rate effects for explosion-resistant and impact-resistant design of reinforced concrete structures,for example,dynamic shear fracture and bond stress distribution on reinforcements set in concrate under impact or explosion.
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