Experimental study on seismic behavior of self-centering concrete-filled square steel tubular column-steel beam frame joint with wedge-shaped device

被引：0
|
作者：
Wang X. [1 ]
Xie C. [1 ]
Luo Y. [1 ]
Zhang J. [1 ]
机构：
[1] School of Civil Engineering, Xi'an University of Architecture & Technology, Xi'an
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2021年 / 42卷 / 09期
关键词：
Frame joint; Quasi-static test; Restoring force model; Seismic behaviour; Self-centering; Wedge-shaped device;
D O I：
10.14006/j.jzjgxb.2019.0529
中图分类号：
学科分类号：
摘要：
In order to alleviate resisting force on recentering stage, a self-centering (SC) concrete-filled square steel tubular column-steel beam frame joint (SCFJ) with wedge-shaped device (WD) was proposed. Quasi-static tests of four SC joints with scale ratio of 2/3 were carried out to investigate the influence of the initial post-tensioned (PT) force, the cross-sectional diameter of energy dissipation (ED) bar and the using of wedge-shaped devices on the mechanical behavior, self-centering behavior and seismic behavior. The results show that the hysteretic curves of SC frame joint are typical double-flag shape with favorable self-centering capability and energy dissipation capacity. The ED bars yields while the column, beam and strands remain in elastic state, indicating that the joints could be quickly repaired by replacing the ED bars and adjusting the WDs. Besides, increasing the initial PT force significantly increases the carrying capacity of the joint. Increasing the cross-sectional diameter of the ED bar has a notable effect on the carrying capacity and energy dissipation capacity. The using of WDs allows the ED bar to fully dissipate energy. A simplified restoring force model of SC frame joint with WD was developed, which agrees well with the test hysteretic curves. © 2021, Editorial Office of Journal of Building Structures. All right reserved.
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页码：52 / 61
页数：9
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