Many structures and buildings, such as nuclear power stations and chemical plants, are often subjected to impact and explosive loadings. The understanding of material response to high-amplitude, short-duration, impulse loads is very important, so dynamic behaviour of concrete under high strain rate has been paid much attention. In the present paper, by using the FEM code LS-DYNA, the numerical simulation on the dynamic splitting tensile test of concrete was carried out, which gives the differences between the stress distributions in the concrete specimen under different kinds of loading cases. The validity of dynamic splitting tensile test was verified. Some available conclusions on improving test method were reached. Dynamic splitting tensile tests at different strain rates were then conducted on 74 mm diameter concrete specimens in a split Hopkinson pressure bar to study the effect of strain rate on die dynamic tension behaviour of concrete. The mechanism and speed of crack propagation of concrete cylinder planar surface in dynamic splitting tensile test were briefly discussed.
展开▼
