Experimental study on seismic behavior of self-centering fabricated steel-concrete hybrid exterior joint

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 / 05期

关键词：

Exterior joint; Precast structure; Pseudo-static test; Seismic behavior; Self-centering structure;

D O I：

10.14006/j.jzjgxb.2020.0286

中图分类号：

学科分类号：

摘要：

In order to combine the advantages of convenient construction of the bolted connection and seismic performance of the post-tensioned connection in prefabricated concrete structures, a self-centering fabricated steel-concrete hybrid exterior joint was proposed. The joint was assembled by a reinforced concrete column and a steel-concrete hybrid beam with high-strength bolts. The resilient ability was mainly provided by unbonded post-tensioned strands in the beam, and the friction device and plastic deformation of the steel beam section provided the energy dissipation capacity. Pseudo-static tests were conducted on five exterior joint specimens to analyze the bearing capacity, seismic behavior, energy dissipation capacity and self-centering capacity. The effects of initial pre-stress of the strands and the initial pretension force of the high-strength bolts at the friction device were critically investigated. The test results indicate that hysteresis curves of specimens can be divided into two typical stages. In the first stage before the yielding of the flanges of steel beam section, the contact interface between the concrete beam and the steel beam section shows a continuous opening and closing mechanism. The hysteresis curves exhibit a clear double flag shape, and the residual deformation is small. In the second stage after the yielding of steel flanges, the plastic deformation of the steel beam section increases with the increase of the lateral load. The hysteresis curve becomes plumper, and the energy dissipation capacity of specimens increases significantly. The peak load, ductility coefficients and cumulative energy dissipation increase with the increase of the initial torque of the high-strength bolt at the friction device. The peak load and self-centering ability increase with the increase of the initial pretension force of applied strands. During the entire test process, the damage occurring in the primary members is not obvious, and the resilience after the earthquake is basically achieved. © 2022, Editorial Office of Journal of Building Structures. All right reserved.

引用

页码：89 / 97

页数：8

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