摘要
为军事防护工程的安全合理设计提供关键的材料特性参数,研究高强混凝土(HSC)在冲击作用下的动态性能响应,采用软件LS-DYNA对C80级HSC在霍普金森压杆(HPB)装置上的冲击层裂过程进行数值仿真分析。仿真表明:应力波在混凝土试块的传播过程中,波形基本保持不变,且峰值震荡不明显;随着冲击速度的增大,混凝土试块的破坏越来越严重;横截面内层裂裂缝由试块表面向内部扩展。数值仿真结果与试验结果有较好的相似性,基本能够反映出HSC试块在HPB冲击层裂试验过程中的受力与破坏特征,由试验结果修正后的HJC本构参数可为后续HSC层裂性能的进一步研究提供参考。
Numerical simulation analysis is performed for the impact spalling process of C80 high strength concrete on the Hopkinson pressure bar （HPB） device by software LS-DYNA to study dynamic response performance of high strength concrete under impact effect for providing key material characteristic parameters in safe and reasonable design of military protection engineering. The simulation results show that the stress waveform basically keeps invariant and the vibration of peak stress is not obvious in the propagation process of concrete specimen; with the increase of impact velocity, the damage of hybrid fiber reinforced high strength concrete is more and more serious; the spalling crack is extended from the surface to the inside within the specimen cross section. The results of numerical simulation demonstrate a good similarity to those of experiment, and basically show the characteristic of dynamic load application and failure of the HSC specimens during the HPB spalling experiment. The modified HJC constitutive parameters can provide reference for further study on the spalling performance of concrete in the future.
作者
焦楚杰
权长青
张国强
吕卫国
胡蝶
JIAO Chujie QUAN Changqing ZHANG Guoqiang LU Weiguo HU Die(School of Civil Engineering, Guangzhou University, Guangzhou 510006, China Architecture and Civil Engineering Institute, Guangdong University of Petrochemical Technology, Maoming 525000, China)
出处
《中国测试》
CAS
北大核心
2016年第10期34-39,共6页
China Measurement & Test
基金
国家自然科学基金(51278135
51478128)
住房和城乡建设部科研开发项目(2010-K3-27)
广州大学重点科技项目培育项目(2015)
关键词
高强混凝土(HSC)
层裂
数值仿真
应力波
high strength concrete（HSC）
spalling
numerical simulation
stress wave
