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。
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.
作者
李晓琴
陈保淇
杜茜
丁祖德
LI XiaoQin;CHEN BaoQi;DU Xi;DING ZuDe(Faculty of Civil Engineering Kunming University of Science and Technology,Kunming 650000,China;Shanghai Key Laboratory of Engineering Structure Safety,Shanghai 200000,China)
出处
《机械强度》
CAS
CSCD
北大核心
2018年第4期901-907,共7页
Journal of Mechanical Strength
基金
国家自然科学基金青年科学基金(51308271
51308270)
教育部留学回国人员科研启动基金(教外司留[2013-1792]号文件)
上海市工程结构安全重点实验室开放课题(2015-KF05)
昆明理工大学省级人培项目(KKSY201306007)资助~~
关键词
混凝土
动力增强因子
应变率
分离式霍普金森杆
Concrete
Dynamic increasing factor（DIF）
Strain rate
Split Hopkinson pressure bar（SHPB）
