Quantitative Estimation of Responses of Reinforced Concrete Structures Subjected to Impact or Impulsive Loadings

钢筋混凝土结构受到冲击或脉冲载荷响应的定量估计

基本信息

批准号：
59460152
负责人：
TAKEDA Jin-ichi
金额：
$ 4.61万
依托单位：
KUMAMOTO INSTITUTE OF TECHNOLOGY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1984
资助国家：
日本
起止时间：
1984 至 1986
项目状态：
已结题

项目摘要

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.

去年4月发生的前所未有的和最严重的意外事故，与核设施相同的重要结构应进行严格，以抵抗爆炸或影响的攻击。步骤是通过数值估计结构的响应（应力，应变等）。 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通过在适当的实验或塑性WBVE分析中获得的数据估算，这些数据相当复杂。次级响应是通过普通的弹性塑性动态响应分析来估计的，除了上述速率效应的考虑以及由于主要响应的考虑以及主要响应造成的裂缝外，对爆炸性的构建效果不佳，并有效地构成了爆炸性的构建，并有效地构成了构建效果。以及在撞击或爆炸下构成的材料中设定的增强件上的键应力分布。