Nonlinear creep effect analysis for short concrete-filled circular steel tubular columns under axial compression

被引：0
|
作者：
Li S.-W. [1 ]
Yang Y.-Q. [1 ]
Pu Q.-H. [1 ]
Sun B. [1 ]
机构：
[1] School of Civil Engineering, Southwest Jiaotong University, Chengdu
来源：
Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2019年 / 53卷 / 06期
关键词：
Continuum damage mechanics; Nonlinear creep effect; Secondary development by ABAQUS; Short circular concrete-filled steel tubular (CFST) columns; Structural engineering;
D O I：
10.3785/j.issn.1008-973X.2019.06.007
中图分类号：
学科分类号：
摘要：
The nonlinear creep effect of axial loaded short concrete-filled circular steel tubular columns under high stress levels was studied based on the continuum damage mechanics method. First, a new damaged plasticity model for uniform confined concrete (DPM-UC) was proposed, making it convenient to simulate the plasticity and damage evolution of concrete under high stress levels. Next, a new theoretical frame for nonlinear creep effect analysis considering 3D characteristic was presented based on DPM-UC; a corresponding numerical analysis method was established and subsequently implemented into the finite element software ABAQUS. Finally, the analytical results were compared with the experimental results under different stress levels. Results show that the calculated results of nonlinear and linear creep theory differ significantly under high stress levels. The predictive value presented by the nonlinear creep theory is closer to the test results, thus the reliability and validity of the proposed method are verified. © 2019, Zhejiang University Press. All right reserved.
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页码：1083 / 1091
页数：8
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