陈君君,关晓迪,魏欢欢,马迪
CHEN Jun-jun,GUAN Xiao-di,WEI Huan-huan,MA Di

• 1:河南省建筑设计研究院有限公司
• 2:西安理工大学西北旱区生态水利国家重点实验室
• 3:杨凌职业技术学院建筑工程学院
• 4:西安交通工程学院土木工程学院

摘要(Abstract)：

基于颗粒流软件PFC~(2D)，模拟了纤维混凝土试样单轴压缩破坏过程，分析了混凝土中纤维长度、直径以及细观参数对纤维混凝土力学特性的影响，得出如下结论：纤维在混凝土试样中是通过影响裂隙的发展而改变混凝土试样的力学性能；随着摩擦因数的增加，混凝土试样的单轴抗压强度提高，弹性模量变化不大；随着孔隙率的增大，混凝土试样的弹性模量呈下降趋势，单轴抗压强度先增大后减小；随着纤维长度和直径的增加，混凝土试样的单轴抗压强度先增大再减小，单轴抗压强度峰值对应的纤维长度和直径分别为20 mm和0.2 mm。
Based on the particle flow software PFC~(2D), the uniaxial compression failure process of fiber reinforced concrete samples was simulated, and the influences of fiber length, diameter and microscopic parameters on the mechanical properties of fiber reinforced concrete were analyzed. The conclusions are as follows: the fibers in the concrete sample change the mechanical properties of the concrete samples by affecting the development of the cracks. With the increase of friction factor, the uniaxial compressive strength of concrete samples increases, but the elastic modulus does not change much. With the increase of porosity,the elastic modulus of concrete samples shows a downward trend, and the uniaxial compressive strength first increases and then decreases. With the increase of fiber length and diameter, the uniaxial compressive strength of concrete samples first increases and then decreases, and the fiber length and diameter corresponding to the peak uniaxial compressive strength are 20 mm and 0.2 mm respectively.

关键词(KeyWords)： 纤维混凝土;离散元模拟;裂隙扩展;力学性能
fiber reinforced concrete;discrete element simulation;crack propagation;mechanical property

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(22002006、5197857);; 河南省高等学校重点科研项目(17A560012);; 河南省重点研发与推广专项(2021022310547)

作者(Author): 陈君君,关晓迪,魏欢欢,马迪
CHEN Jun-jun,GUAN Xiao-di,WEI Huan-huan,MA Di

DOI: 10.16090/j.cnki.hcxw.2022.04.014

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