Mechanical performance of a flexural shear mild steel damper

被引：0
|
作者：
Wang W. [1 ]
Wang W. [1 ]
Liang Y. [1 ]
Xiang Z. [1 ]
Han B. [1 ]
机构：
[1] School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2020年 / 51卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Constitutive model; Corrugated; Depth-width ratio; Hysteretic behavior; Mild steel damper;
D O I：
10.11817/j.issn.1672-7207.2020.10.024
中图分类号：
学科分类号：
摘要：
In order to solve the problem that the existing metal damper has low out-of-plane stiffness and is vulnerable to local buckling, a corrugated mild steel damper was proposed. Taking the layout of corrugated plates as the variable parameter, two specimens were designed and two quasi-static tests were carried out. Two corresponding finite element models were established based on the structural form and size of the test specimen, and were analyzed by using bilinear follow-up strengthening model, nonlinear follow-up strengthening model and hybrid strengthening model. Then, the deformation and microscopic strain of the specimen and model were compared and analyzed, and the expansion factor analysis of the horizontal corrugated mild steel damper was carried out. The results show that the corrugated mild steel damper has stable hysteresis performance, and the energy-dissipation performance of the horizontal mild steel damper is superior to that of the vertical corrugated soft steel damper, while the bearing capacity is lower. The finite element analysis results manifest that when using hybrid strengthening model, the mechanical property of the corrugated mild steel damper model agrees well with the experimental results, indicating that the hybrid strengthening model is a more accurate constitutive model of the corrugated mild steel damper. The damper has the lowest energy dissipation and the best carrying capacity when the depth-width ratio of the web is 0.9. © 2020, Central South University Press. All right reserved.
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页码：2925 / 2940
页数：15
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