二级配骨料随机分布混凝土动态特性数值模拟
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宁夏大学 土木与水利工程学院,宁夏大学 土木与水利工程学院

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中图分类号:O347.3

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国家自然科学(51368048,11162015),教育部“长江学者和创新团队发展计划”创新团队项目(IRT1067)


Numerical Simulation of Dynamic Mechanical Properties of Two-gradation Concrete with Random Distribution of Coarse Aggregate
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School of Civil and Hydraulic Engineering,Ningxia University,School of Civil and Hydraulic Engineering,Ningxia University

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    摘要:

    混凝土是民用、工业、安全防护等建筑中最常用的材料之一,具有抗压强度高、工艺简单、抗腐蚀性好、抗耐性优良等特点。在使用过程中,不仅要承受准静态荷载作用,还需考虑爆炸、冲击等动载荷的作用,因此有必要进行混凝土动态特性研究。利用ANSYS/LS-DYNA软件,对粗骨料粒径和体积含量不同二级配混凝土动态特性进行模拟,分析粗骨料粒径和体积含量对二级配混凝土动态特性影响规律。研究表明:随着粗骨料最大粒径的增加,二级配混凝土峰值应力呈下降趋势;随着粗骨料中间粒径和体积含量增大,二级配混凝土峰值应力均呈现先增大后减少趋势。

    Abstract:

    Concrete is widely used in civil, industrial and safety defense buildings, which has high compressive strength, simple preparation, better corrosion and tolerance resistance. Concrete is not only used to be sustained with quasi-static loading, but also subjected to impact and explosion loading. It is necessary to study on the dynamic mechanical properties of concrete. Finite element software ANSYS/LS-DYNA was used to simulate the dynamic failure process of two-gradation concrete with various sizes and volume content of coarse aggregate. Simulated results shows that the peak stress of two-gradation concrete subjected to impact loading declines with the maximum size of coarse aggregate. With the increase of middle size and volume content of coarse aggregate, the peak stress of two-gradation concrete increase firstly, and then declines.

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刘海峰,陈巧丽. 二级配骨料随机分布混凝土动态特性数值模拟[J]. 科学技术与工程, 2017, 17(20): .
Liu Haifeng, Chen Qiaoli. Numerical Simulation of Dynamic Mechanical Properties of Two-gradation Concrete with Random Distribution of Coarse Aggregate[J]. Science Technology and Engineering,2017,17(20).

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  • 收稿日期:2017-01-07
  • 最后修改日期:2017-02-17
  • 录用日期:2017-03-16
  • 在线发布日期: 2017-07-17
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