权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Development of R/C structures with columns an shear walls using un-bonded reinforcing bars

使用无粘结钢筋开发带有柱和剪力墙的 R/C 结构

基本信息

批准号：
15560509
负责人：
ESAKI Fumiya
金额：
$ 2.3万
依托单位：
Fukuoka University (2004-2005)Kyushu Kyoritsu University (2003)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560509/
关键词：
R C Column Un-bond PC steel bar Residual deformation Shear wall Flexural failure

项目摘要

The aim of this study is to develop the reinforced concrete buildings whose residual lateral drift was decreased after severe earthquake excitation by using the R/C columns with un-bonded high strength longitudinal reinforcing bars. Also, this study intend to improve the lateral drift capacity of framed shear walls failed in flexure by using the un-bonded longitudinal reinforcing bars in their edge columns. The followings were concluded.(1)Relation between the experienced lateral drift angle, Ro, and the residual one, Rr, on the R/C columns failed in flexureThe relation between Ro and Rr was obtained by the experimental data mentioned in the technical papers of AIJ annual meeting printed in 1993-1993. The residual lateral drift increased gradually at the stage where the experienced lateral drift was over 1%.(2)Hysteresis response of R/C columns with un-bonded longitudinal reinforcing barsThe increase of the residual lateral drift of the columns with un-bonded high strength bars was less than that of the columns with bonded normal ones under the large drift. The self-centering hysteresis response was observed in the specimens with the un-bonded longitudinal reinforcing bars. The residual lateral drift of columns with un-bonded bars was small at the stage where the experienced lateral drift angle was 3%.(3)Hysteresis response of R/C framed shear walls with their edge columns reinforced by un-bonded longitudinal reinforcing barsThe lateral drift capacity of shear walls was improved by using the un-bonded longitudinal reinforcing bars. The end of edge column in the compression side required the confinement bars in order to improve more the deformation capacity.(4)Hysteresis response of cross type sub-assemblage frame with the column reinforced by the un-bonded barsThe residual drift of the frame was larger than that of the columns because the plastic deformation of the beam-column joint and the beams occurred.

本研究的目的是开发使用带有无粘结高强纵向钢筋的 R/C 柱来减少强烈地震激发后残余侧向位移的钢筋混凝土建筑。此外，本研究旨在通过在其边缘柱中使用未粘结的纵向钢筋来提高因弯曲而失效的框架剪力墙的横向漂移能力。主要结论如下： (1)受弯破坏的R/C柱经历的横向位移角Ro与残余位移角Rr的关系Ro与Rr的关系是根据1993-1993年AIJ年会技术论文中提到的实验数据得出的。当横向位移超过1%时，残余侧向位移逐渐增大。(2)无粘结纵筋钢筋混凝土柱的滞后响应在大位移下，无粘结高强钢筋柱的残余侧向位移增加量小于粘结普通钢筋的柱。在具有未粘结纵向钢筋的样本中观察到自定心滞后响应。在经历的侧向位移角为3%阶段，无粘结钢筋柱的残余侧向位移较小。(3)无粘结纵向钢筋加固边柱的R/C框架剪力墙的滞后响应无粘结纵向钢筋的使用提高了剪力墙的横向位移能力。受压侧边柱端部需设置约束筋，以进一步提高变形能力。(4)无粘结筋加固柱的十字组合框架的滞回响应由于梁柱节点和梁体发生塑性变形，框架的残余位移大于柱的残余位移。