Seismic Behavior of Circular Steel Tube-Confined H-Steel Reinforced Concrete Column-Steel Frame Ring Beam Joint

被引：1
|
作者：
Dai Y. [1 ,2 ]
Nie S. [1 ]
Zhou T. [1 ]
机构：
[1] School of Civil Engineering, Chang'an University, Xi'an, 710061, Shaanxi
[2] Xi'an Traffic Construction Quality Supervision Station, Xi'an, 710065, Shaanxi
来源：
Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) | 2019年 / 47卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Axial compression; Circular steel tube-confined H-steel reinforced concrete column; Line stiffness ratio; Ring beam; Seismic behavior; Variable parameter;
D O I：
10.12141/j.issn.1000-565X.180505
中图分类号：
学科分类号：
摘要：
In this paper, a circular steel tube-confined H-steel reinforced concrete column-steel frame ring beam joint was designed, and a full-scale three-dimension finite element analysis model of the specimen was established. Then, the hysteretic curves, skeleton curves and failure modes of the specimens were calculated, and the results were compared with those obtained by experiments, with good accordance being found. Moreover, a finite-element variable parameter analysis was carried out to reveal the effects of axial compression ratio, concrete strength and line stiffness ratio on the seismic behavior of specimens. Finally, an improved node form of beam end-weakening flange was put forward. The results show that(1)with the increase of axial compression ratio, the energy dissipation and ductility of the specimen decrease significantly; (2)the change of concrete strength has little effect on the hysteretic behavior of specimens; (3)the bearing capacity, ductility and seismic energy dissipation performance of the joints all increase significantly with the increase of beam-column linear stiffness ratio when the column section remains unchanged and only the steel beam size varies; (4)when the section of steel beam remains unchanged and the steel content in the column varies, the change of seismic behavior of the joint with the line stiffness ratio of beam to column is not obvious; and(5)the adoptin of beam end-weakening flange helps to move the plastic hinge far away from the joint area without remarkably reducing the bearing capacity and energy dissipation performance of the specimen, thus protecting the joint area more effectively. The above-mentioned relevant conclusions lay a theoretical foundation for the application of this new type of joint. © 2019, Editorial Department, Journal of South China University of Technology. All right reserved.
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页码：110 / 122
页数：12
相关论文
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