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Research on Intermediate-story Collapse of Reinforced Concrete Buildings by Pseudo-dynamic Test

钢筋混凝土房屋中层倒塌拟动力试验研究

基本信息

批准号：
19760393
负责人：
NAKAMURA Takaya
金额：
$ 2.37万
依托单位：
Tokyo Metropolitan University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Young Scientists (B)
财政年份：
2007
资助国家：
日本
起止时间：
2007 至 2009
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19760393/
关键词：
鉄筋コンクリート建物中間層崩壊擬似動的実験せん断破壊構造耐震指標旧基準耐力低下最大水平変形耐力低下時水平変形建物層数横補強筋比耐力20%時水平変形サブストラクチャ擬似動的実験鉄筋コンクリート柱せん断補強筋比

项目摘要

During the 1995 Kobe earthquake, a number of old buildings with around ten stories suffered intermediate-story collapse. In order to reveal the process of intermediate-story collapse, dynamic responses of R/C buildings idealized as represented by a single column line were studied by the substructure pseudo-dynamic test methods. The columns were designed so that shear failure surely might result. Nine and three story buildings were studied. The third story from the top was determined as collapse story (thus the nine story and three story buildings suffered collapse, respectively at the seventh and first stories). And imaginary mass was introduced so that Seismic Capacity Index, IS prescribed by the Standard for Seismic Evaluation of Existing Buildings of the collapse story might result in about 0.4. Three earthquake records were used as input motions. The most major finding from the study is that the intermediate-story collapse of nine story buildings is easier to occur than the first-story collapse of three story buildings.

在1995年的科比大地震中，一些十层左右的老建筑遭受了中层倒塌。为了揭示中间层倒塌过程，采用子结构拟动力试验方法，研究了以单柱线为代表的理想化钢筋混凝土结构的动力反应。柱子的设计是为了确保剪切破坏的发生。研究了9层和3层建筑。从顶部算起的第三层被确定为倒塌层（因此九层和三层建筑物分别在第七层和第一层发生倒塌）。并引入虚质量，使倒塌层的抗震能力指标IS达到0.4左右。三个地震记录被用作输入运动。该研究最主要的发现是，9层建筑物的中间层倒塌比3层建筑物的第一层倒塌更容易发生。