NUMERICAL SIMULATION OF SHPB DYNAMIC COMPRESSION TEST OF CONCRETE

LI XiaoQin; CHEN BaoQi; DU Xi; DING ZuDe

doi:10.16579/j.issn.1001.9669.2018.04.023

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NUMERICAL SIMULATION OF SHPB DYNAMIC COMPRESSION TEST OF CONCRETE

更新时间：2022-09-22

- NUMERICAL SIMULATION OF SHPB DYNAMIC COMPRESSION TEST OF CONCRETE
- Journal of Mechanical Strength Vol. 40, Issue 4, Pages: 901-907(2018)
- 作者机构：
  
  1. 昆明理工大学建筑工程学院土木系
  2. 上海市工程结构安全重点实验室
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2018.04.023
  CLC：
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LI XiaoQin, CHEN BaoQi, DU Xi, et al. NUMERICAL SIMULATION OF SHPB DYNAMIC COMPRESSION TEST OF CONCRETE. [J]. 40(4):901-907(2018)
DOI：

LI XiaoQin, CHEN BaoQi, DU Xi, et al. NUMERICAL SIMULATION OF SHPB DYNAMIC COMPRESSION TEST OF CONCRETE. [J]. 40(4):901-907(2018) DOI： 10.16579/j.issn.1001.9669.2018.04.023.

摘要

分离式霍普金森杆Split Hopkinson pressure bar(SHPB)试验装置被广泛用于材料在高应变率下力学行为的测量。基于K&C局部损伤混凝土模型对混凝土材料动态抗压试验进行数值模拟,利用SHPB二波法理论重构了混凝土试件的应力应变曲线,分析了混凝土试件破坏规律,证明了K&C局部损伤混凝土模型能较好的模拟混凝土在高应变率条件下的混凝土动态抗压的力学行为,考量了应变率效应对混凝土动态强度的影响,讨论并证明了混凝土动态抗压强度的增加主要来源于结构效应而非材料属性的改变。

Abstract

Split Hopkinson pressure bar（SHPB） tests are widely used for testing material mechanism behavior under high strain rates,A series of SHPB numerical tests were done based on K＆C local concrete damage model,The stress-strain curves of the concrete specimens were reconstructed with the two-wave theory,and the damage of the concrete was analyzed.According to the comparison between the numerical and the test results,Proving K＆C model can simulate concrete in concrete under high strain rate compressive mechanical behavior.Proving the increase of dynamic strength of concrete under the influence of structural effects.

关键词

混凝土动力增强因子应变率分离式霍普金森杆

Keywords

ConcreteDynamic increasing factor（DIF）Strain rateSplit Hopkinson pressure bar（SHPB）

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