Phenomenological hysteretic model considering low-cycle fatigue effects for hollow circular steel braces

被引：0
|
作者：
Zheng H. [1 ]
Fan J. [2 ]
Zhang Y. [2 ]
机构：
[1] Department of Civil Engineering, Tsinghua University, Beijing
[2] College of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan
来源：
Fan, Jian (fan-jian@hust.edu.cn) | 1600年 / Science Press卷 / 41期
关键词：
Fracture; Low-cycle fatigue; Nonlinear post-buckling; Phenomenological hysteretic model; Steel brace;
D O I：
10.14006/j.jzjgxb.2018.0237
中图分类号：
学科分类号：
摘要：
ABAQUS was used to calculate the buckling capacity, equilibrium path of nonlinear buckling, unloading-reloading paths and damages of a series of hollow circular steel braces with varying slenderness and width-to-thickness ratios. The simulation results of a typical brace were compared with experiments to verify the accuracy of the finite element model. A simple yet efficient phenomenological hysteretic model was calibrated on the basis of the available experimental results and based on a series of numerical simulations by ABAQUS. The Coffin-Manson equation coupled with Miner linear damage theory was adopted to predict the low-cycle fatigure effects. The equation of the cumulative yielding strength degradation was also formulated with the cumulative fatigue damage. Therefore, this proposed model can account for several nonlinear hysteretic behavior, such as yielding in tension, nonlinear buckling in compression, Bauschinger effect, strength degradation and fracture due to low-cycle fatigue. The hysteretic loops and cumulative energy dissipation predicted by the model are consistent with the previous tests and finite element simulation results.In addition, the model requires much less computing time and is therefore suitable for nonlinear analysis of hollow circular steel brace structures. © 2020, Editorial Office of Journal of Building Structures. All right reserved.
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页码：172 / 181
页数：9
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