Research on Estimation Method of Deformation Capacity of Reinforced Concrete Encased Steel under Varying Axial Force and Bi-Axial Horizontal Force

变轴力和双轴水平力作用下钢筋混凝土钢筋变形能力估算方法研究

基本信息

批准号：
11650580
负责人：
KATO Daisuke
金额：
$ 2.3万
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：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

项目摘要

(1) PurposeIt aims at explaining the validity of a method to evaluate the deformation capacity of the steel framed reinforced concrete (abbreviated as SRC hereafter) beam-columns under varying axial force, on the basis of a method under constant axial force.(2) Research programThe static loading test of the SRC specimens were carried out under varying axial force or constant axial force. These specimens were subjected to the lateral force in the direction of the principal axis of the section or in the direction at 45 degrees. Furthermore, it was analyzed about the deformation capacity of the SRC beam-columns by the data including the experiment data from literature materials.(3) Result of researchFlexural yield occurred before shear failure in all specimens. The limit rotation angle^<*1)> in the case that N/Nu^<*2)> changed from 0.5 to -0.2 was about 7x10^<-2> radian, and a little poor in comparison with the case that N/Nu = 0.3 or N/Nu changed from 0.3 to -0.1. A lateral force condition didn't exert a great influence on the result of the experiment. The axial force ratio at the maximum strength under compressive axial force and the flexural strength ratio of the steel portion have a great influence to the limit rotation angle in the case of varying axial force. By modification of the appraisal method in the case of constant axial force, it could be mostly evaluated.Note:*1) The axial compressive strength superposing that of the steel portion and the RC portion.*2) The rotation angle of the member of which strength declines to 80% of the maximum strength.(4) SummaryIt has been shown that the deformation capacity of SRC beam-columns subjected to the varying axial force could be mostly evaluated by modifying the appraisal method in the case of the constant axial.

（1）目的旨在解释一种方法的有效性，以根据恒定轴向力下的方法在不同的轴向力下评估在不同轴向力下的钢构框钢筋混凝土（以下简称为SRC）的变形能力。（2）研究程序研究程序的静态载荷测试SRC的静态载荷测试，该测试的静态载荷测试均可遵循SRC的静电量。将这些样品沿截面主轴的方向或在45度的方向上进行横向力。此外，通过数据（包括来自文献材料的实验数据）对SRC梁柱的变形能力进行了分析。（3）在所有标本中，剪切失败之前就发生了研究屈服的结果。如果N/NU^<*2）>从0.5更改为7x10^<-2> radian，则极限旋转角度^<*1）>与N/NU = 0.3或N/NU更改为0.3或0.3更改为-0.1。横向力条件不会对实验结果产生很大的影响。在变化的轴向力的情况下，在压缩轴向力下的轴向力比在压缩轴向力下的最大强度和弯曲强度比对极限旋转角具有很大的影响。通过修改评估方法在恒定的轴向力的情况下，可以大部分评估。注意：*1）轴向压缩强度超级物质超过钢部分和RC部分的轴向压缩力。通过在恒定轴向情况下修改评估方法。