Micromechanical Analysis of Steel Fiber Corrosion in Ultra-high Performance Concrete

被引：0
|
作者：
Shu G. [1 ]
Zhang Q. [2 ]
Huang Y. [2 ]
Bu Y. [2 ]
机构：
[1] Sichuan Zhitong Luqiao Engineering and Technology Co. Ltd., Chengdu
[2] School of Civil Engineering, Southwest Jiaotong University, Chengdu
来源：
Xinan Jiaotong Daxue Xuebao/Journal of Southwest Jiaotong University | 2019年 / 54卷 / 06期
关键词：
ABAQUS secondary development; Micromechanical analysis; Model test; !text type='PYTHON']PYTHON[!/text] algorithm; Steel fiber corrosion simulation; Ultra-high performance concrete (UHPC);
D O I：
10.3969/j.issn.0258-2724.20170453
中图分类号：
学科分类号：
摘要：
In order to study the influence of the volume content and corrosion degree of the steel fiber on the strength and deformation of the structure, the large-volume randomization of the steel fiber in ultra-high performance concrete (UHPC) matrix was realized by the ABAQUS software redeveloped by self-compiling Python script file. Based on this, the UHPC defect corrosion simulation method was developed and the equivalent method of the steel fiber corrosion was explored. Finally, the UHPC beam four-point bending test was taked as an example to verify the UHPC micromechanics analysis method, corrosion simulation method, and equivalent means. The results show that when the fiber volume content is 2%, the UHPC beam has the best bending resistance; corrosion weakens the cross-section of fibers, stress concentration near the corrosion pits and the destroyed interfacial bonding are the key factors affecting the corrosion effect. The random material property distribution method is limited to simulate the macroscopic deformation of UHPC beams, and can't accurately simulate the distribution of stress field. © 2019, Editorial Department of Journal of Southwest Jiaotong University. All right reserved.
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页码：1268 / 1276
页数：8
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