Experimental study on seismic performance of H-section beam-column welded connections corroded in general atmosphere

被引：0
|
作者：
Wang Y. [1 ]
Shi T. [1 ]
Ma R. [1 ,2 ]
Xu S. [1 ]
机构：
[1] Department of Civil Engineering, Xi'an University of Architecture & Technology, Xi'an
[2] First Affiliated Hospital of Xi'an Jiaotong University, Xi'an
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2022年 / 43卷 / 07期
关键词：
Beam-column welded connection; Corrosion; General atmospheric environment; Quasi-static test; Seismic performance;
D O I：
10.14006/j.jzjgxb.2020.0604
中图分类号：
学科分类号：
摘要：
Six H-section steel beam-column welded connections were subjected to the periodic outdoor spray accelerated corrosion test and low-cycle loading test to study the influence of atmospheric corrosion on the seismic performance of beam-column welded connections. The damage process, failure mode, hysteretic curve, skeleton curve, bearing capacity, deformation capacity, stiffness and energy dissipation capacity of the welded beam-column connections with different corrosion degrees were studied, and their degradation laws with the increasing corrosion ratio were revealed. The results indicate that the beam-column connections show general corrosion characteristics under a general atmospheric environment, and there are differences in the corrosion loss at different positions. The amount of corrosion from most to least is beam lower flange, beam web(column flange, column web), beam upper flange. Corrosion has an important influence on the failure mode of beam-column welded connections. Severe local buckling at the beam root was observed for the beam-column connections with the corrosion ratio of 5.03%-8.85%, resulting in obvious bearing capacity degradation, and the failure characteristics changed from sudden failure to mixed failure. Meanwhile, corrosion causes the critical crack initiation position to move up and the crack propagation path to change. The yield load, peak load, peak displacement and ductility coefficient of the corroded beam-column connections all show linear degradation laws and produce initial stiffness damage. The number of plastic cyclic loading during the failure is reduced by two to four times, resulting in the energy dissipation to decrease in a power function. The total rotation angle at the beam end of the beam-column connections with the corrosion ratio of 5.03%-8.85% cannot meet the requirement of 5% in the seismic design. © 2022, Editorial Office of Journal of Building Structures. All right reserved.
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页码：184 / 193
页数：9
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