Restoring Force Model for Steel Frame Joints Considering Corrosion Damage

被引：0
|
作者：
Cao C. [1 ,2 ]
Zheng S. [1 ,2 ]
Hu W. [1 ,2 ]
He J. [3 ]
Zhang X. [1 ,2 ]
Liu Y. [1 ,2 ]
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, Ministry of Education(XAUAT), Xi'an
[3] Architectural Design and Research Institute of Xi'an University of Architecture and Technology, Xi'an
来源：
Tianjin Daxue Xuebao (Ziran Kexue yu Gongcheng Jishu Ban)/Journal of Tianjin University Science and Technology | 2020年 / 53卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Acidic atmospheric environment; Corrosion; Low cyclic loading test; Restoring force model; Steel frame joint;
D O I：
10.11784/tdxbz201906010
中图分类号：
学科分类号：
摘要：
To study the seismic behavior of corroded steel-frame beam-column joints in an acidic atmosphere, we conducted accelerated corrosion tests and quasi-static loading tests on six steel frame beam-column joints in an acidic atmospheric environment and analyzed their hysteretic behaviors with different degrees of corrosion.The test results show that as the degree of corrosion increases, the mechanical and seismic properties of the specimens deteriorate, including the strength, stiffness, ductility, and hysteretic energy.Based on the experimental research results, we established a bending moment-shear angle trilinear skeleton curve model of the core area of the steel frame beam-column joint.With reference to the characteristic parameters of the restoring force model, for an uncorroded member, we obtained a formula for characteristic points on the skeleton curve of steel frame beam-column joints that considers the steel corrosion damage.We introduce a cyclic degradation index βi based on the hysteretic energy loss, and propose a hysteresis rule for application to steel frame beam-column joint specimens after corrosion cycles.We also established a restoring force model for the corroded steel frame beam-column joint, which considers strength and stiffness degradations.A comparison of the theoretical hysteresis curves with the experimental results, reveals that they are in good agreement, which further proves the good applicability of the proposed restoring force model for steel frame joints that considers corrosion damage.This study provides a theoretical basis for the seismic response analysis and anti-seismic evaluation of existing steel frame structures in acidic atmospheric environments. © 2020, Editorial Board of Journal of Tianjin University(Science and Technology). All right reserved.
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页码：695 / 703
页数：8
相关论文
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