河北水利电力学院学报2024，Vol.34Issue(1)：22-28,7.DOI:10.16046/j.cnki.issn2096-5680.2024.01.004
冲击荷载作用下混凝土动态力学性能研究
Study on Dynamic Mechanical Properties of Concrete under Impact Load
摘要
Abstract
In order to investigate the dynamic mechanical properties of concrete under impact load,fi-nite element analysis software was used to simulate the SHPB tests of C30,C40 and C60 concrete under different impact velocities.The stress-strain curves and energy time-history curves at different velocities were obtained by numerical simulation,and the crushing process of the specimen was analyzed.The re-sults show that the peak stress of C40 concrete and C60 concrete is 20.8%and 31.6%higher than that of C30 concrete,respectively.Improving the strength grade of concrete can improve the impact resistance of concrete structure.When the impact velocity is 10m/s and 15m/s,the strain rate of concrete is 3.2 and 4.7 times that of 5m/s,respectively,indicating that concrete is a strain rate-sensitive material.The ener-gy time history curve is generally divided into three stages:the initial stable stage,the mid-term growth stage,and the final stable stage.Under impact load,concrete breaks from the edge from outside to inside first,and splits inside.关键词
数值模拟/能量/混凝土Key words
numerical simulation/energy/concrete分类
建筑与水利引用本文复制引用
程思悟,代兴先,冯凯,齐子怡,张泽..冲击荷载作用下混凝土动态力学性能研究[J].河北水利电力学院学报,2024,34(1):22-28,7.基金项目
河北建筑工程学院研究生创新基金项目(XY202207) （XY202207）
河北建筑工程学院研究生创新基金项目(XY2023041) （XY2023041）
