Evaluating method of axial load carrying capacity of reinforced concrete columns failing in shear considering reinforcing details

考虑配筋细节的钢筋混凝土抗剪柱轴向承载力评价方法

基本信息

批准号：
14550561
负责人：
KATO Daisuke
金额：
$ 2.62万
依托单位：
NIIGATA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550561/
关键词：
reinforced concrete shear failure axial load carrying capacity column reinforcing detail loading history bending and shear loading test axial loading test 鉄筋コンクリート構造軸圧縮実験

项目摘要

Final objective of this study is to prevent pancake type collapse of R/C old buildings during sever earth quake. For this purpose axial load carrying capacity of columns failing in flexure have been studied. In this study the scope was extended to shear failing columns, axial load capacity under residual deformation and effects of reinforcing details. Ten R/C specimens with square sections were tested. Two types of specimens were made with varying only reinforcing details. The hoop of H-series had 135 degrees hook. And the hoop of P-series had 90 degree hook details. Another main variable was loading methods ; i.e.monotonic centric axial loading, eccentric axial loading under constant lateral drift and normal reversed lateral loading under constant axial load. Main conclusions were as follows. (1)Specimens with high axial load lost scheduled axial load far before it's axial deformation reached axial load-axial deformation relation of specimen with centric axial load. On the other hand, Specimens with low axial load lost scheduled axial load when its axial deformation reached axial load-axial deformation relation of specimen with centric axial load. (2)There was little difference of behavior between specimens with normal reinforcing details (H-series) and those with poor reinforcing details (P-series).

这项研究的最终目的是防止薄o/c旧建筑物在切断的地震期间的薄煎饼类型崩溃。为此，已经研究了弯曲失败的圆柱载荷能力。在这项研究中，范围扩展到剪切失败的色谱柱，残余变形下的轴向负载能力以及加强细节的影响。测试了带有方形截面的十个R/C标本。两种类型的标本是通过不同的加固细节而变化的。 H系列的箍具有135度钩。 P系列的箍有90度的挂钩细节。另一个主要变量是加载方法。即以单调为中心的轴向载荷，在恒定侧向漂移下偏心轴向载荷以及在恒定轴向载荷下正常的侧向负荷。主要结论如下。（1）具有高轴向负载的标本丢失的计划轴向载荷在轴向变形之前远距离达到了轴向载荷 - 轴轴形变形的关系与中心轴向负载。另一方面，当其轴向变形达到轴向载荷 - 轴轴变形与中心轴向负载时，其轴向轴向变形达到轴向载荷 - 轴形变形关系时，具有低轴向载荷的标本。（2）具有正常加强细节（H系列）的标本与较差的增强细节（P系列）之间的行为差异很小。