哈尔滨工程大学学报2025，Vol.46Issue(2)：210-218,9.DOI:10.11990/jheu.202209044
不同冲击荷载作用下风积砂混凝土动力学特性及能量耗散规律研究
Dynamic characteristics and energy dissipation law of Aeolian sand concrete under different impact loads
摘要
Abstract
The dynamic impact failure test of Aeolian sand concrete was carried out using the split Hopkinson pres-sure bar system to investigate the dynamic characteristics and energy dissipation law of Aeolian sand concrete under different impact loads.The macroscopic failure mode,dynamic features,and energy dissipation characteristics un-der single and cyclic impact were mainly studied.The results show that under a single impact,with the increase in pressure,a higher crushing degree of the specimen indicates a smaller block particle size.The peak stress and strain increase and show evident strain rate correlation.The strength of the specimen increases,as well as the ab-sorption energy per unit volume,whereas the energy absorption rate decreases.Under cyclic impact,the number of impacts required to cause damage to the specimen decreases as the impact pressure increases.At constant pressure,as the number of impacts increases,the degree of fragmentation of the specimen transforms from larger particle sizes to smaller and medium sizes.The peak stress shows a positive correlation with the number of impacts,whereas the peak strain exhibits an inverse relationship.In addition,the energy absorbed per unit volume and the energy ab-sorption rate generally show a downward trend.The influence of Aeolian sand on the impact resistance of concrete can be attributed to its effects on pore volume and distribution,which consume impact energy and weaken the struc-tural impact response.At the same time,the incorporation of Aeolian sand alters particle grading and concrete com-pactness,improving the structure of the interface transition area.Finally,these changes enhance the impact resist-ance of the concrete.关键词
风积砂混凝土/分离式霍普金森压杆/循环冲击/破坏模式/应变率/动态增长因子/动力学特性/能量耗散Key words
Aeolian sand concrete/(Split Hopkinson pressure bar)SHPB/cyclic impact/failure modes/dynamic growth factor/strain rate/energy dissipation分类
土木建筑引用本文复制引用
张慧梅,王丹,陈世官..不同冲击荷载作用下风积砂混凝土动力学特性及能量耗散规律研究[J].哈尔滨工程大学学报,2025,46(2):210-218,9.基金项目
国家自然科学基金项目(12172280,12472406) （12172280,12472406）
陕西省自然科学基金重点项目(2020JZ-53) （2020JZ-53）
陕西省重点研发计划(2024SF-YBXM-626). （2024SF-YBXM-626）
