Experimental study on seismic performance of prefabricated hybrid joints with buckling-restrained dog-bone steel beam

被引：0
|
作者：
Feng S. [1 ]
Yang Y. [1 ,2 ]
Xue Y. [1 ]
Yu Y. [1 ,2 ]
Wang X. [1 ]
机构：
[1] School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an
[2] Key Lab of Structural Engineering and Earthquake Resistance of the Ministry of Education, Xi'an University of Architecture and Technology, Xi'an
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2022年 / 43卷 / 01期
关键词：
Beam-column joint; Buckling-restrained dog-bone steel beam; Prefabricated steel-concrete hybrid structure; Pseudo-static test; Seismic behavior;
D O I：
10.14006/j.jzjgxb.2020.0285
中图分类号：
学科分类号：
摘要：
In order to combine the advantages of convenient construction of precast concrete structures and seismic performance of dog-bone-shaped members in steel structures, a novel prefabricated hybrid joint with buckling-restrained dog-bone steel beam was proposed in this paper. The joint was assembled by one precast reinforced concrete column and prefabricated steel-concrete hybrid beams using high-strength bolts, and the hybrid beams were assembled by buckling-restrained dog-bone steel beam section and RC beam section using high-strength bolts. With the aim of investigating the seismic performance of the joints, quasi-static tests of two interior joints and two exterior joints were conducted. Through the analyses of failure modes, hysteretic loops, skeleton curves, cumulative energy dissipation, ductility, strength and stiffness degradation, the effects of joint shape and the application of posttensioning strands were taken into consideration. The results indicate that the joint is assembled completely using high-strength bolts, which can achieve a fast construction. The failure of specimens is basically concentrated in the steel beam section, which achieves the purpose of keeping plastic hinge regions away from the joint core zone. The concrete beam section of the prestressed joints has better crack resistance than the unstressed joint, and the overall seismic performance of the prestressed joint is also improved. The calculation method for the flexural capacity of the beam end in the joint is proposed, which are in good agreement with the test results. © 2022, Editorial Office of Journal of Building Structures. All right reserved.
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页码：59 / 68
页数：9
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