Experimental study on seismic behavior of steel reinforced concrete column under combined torsion

被引：0
|
作者：
Weng X. [1 ,2 ]
Shao Y. [2 ,3 ]
Lao Y. [2 ,3 ]
Xia M. [2 ,3 ]
机构：
[1] School of Mechanical Engineering, Suzhou University of Science and Technology, Suzhou
[2] Jiangsu Province Key Laboratory of Structure Engineering, Suzhou University of Science and Technology, Suzhou
[3] School of Civil Engineering, Suzhou University of Science and Technology, Suzhou
来源：
| 1600年 / Science Press卷 / 38期
关键词：
Combined torsion; Quasi-static test; Seismic behavior; Steel reinforced concrete column;
D O I：
10.14006/j.jzjgxb.2017.11.003
中图分类号：
学科分类号：
摘要：
In order to study the seismic behavior of steel reinforced concrete columns subjected to combined torsion, the quasi-static tests of eleven steel reinforced concrete members and one reinforced concrete member for comparison under combined torsion were carried out. The influence of steel form, axial compression ratio, torsion-bending ratio, concrete strength, reinforcement ratio and stirrup ratio on the seismic behavior of members were studied. The results show that the entire process of load-bearing in steel reinforced concrete members under combined torsion can be divided into: non-cracking stage, cracking stage and failure stage. The failure modes of members have two types: failure with torsional feature and failure with flexural and torsional feature. The hysteresis loop is larger for members with axial compression ratio of 0.1 than 0.2, with torsion-bending ratio of 0.5 than 0.1, and with stirrup spacing of 75 mm than 100 mm. The average value of ductility factors for eleven steel reinforced concrete members is 5.12. Thereinto, the average values are 4.17 and 6.27 for six H-shaped members and five cross-shaped members respectively. And the average value is 3.86 for one reinforced concrete contrast member. With the increase of the displacement, the attenuation of the bearing capacity for members grows bigger and bigger. The entire degradation process of relative stiffness consists of three stages: elastic degradation stage, yield degradation stage and failure degradation stage. The equivalent damping ratio increases with the increasing of torsional curvature and a rough linear relationship is found between these two parameters. © 2017, Editorial Office of Journal of Building Structures. All right reserved.
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页码：23 / 33
页数：10
相关论文
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