| With the development of modern technology, especially the development of military defense project, more and more attention has been focused on the response of structures to various shock and explosive loadings.Tensile strength is one of the most important mechanical properties of concrete for design of subterranean engineering. It is also a key Parameter of concrete for strength design, safety and stability analysis of concrete structures. In the present Paper, experimental investigation on static and dynamic splitting tensile test behaviour of concrete is carried out. Firstly, the most recent development of investigation on material characteristic under different strain rate of concrete are reviewed, and the static splitting tensile test principle is introduced briefly. Based on the former theoretical introduction, the test procedure is simulated by using finite element code ANSYS to get a view of distribution and variety of stress. The Paper discusses systematically specimen size effect and plane stress (strain) effect, and points out that the formula existed for many years to calculate the tensile strength of concrete in Brazilian test is not suitable for the practical condition which is a 3D problem. In addition, the Paper analyzes load contact mode,the size of the mat and Brazil disk platform's defects to the infiunce of the static test results.Secondly, the procedure of dynamic spilitting test is simulated by using finite element code LS-DYNA. The results show that in a dynamic situation the specimens from the center does not meet the conditions of crack, the effectiveness of dynamic testing is worthy of discussion; In addition, a focus of this Paper is to discuss the adverse effects of platform deviation of Brazil disk platform from two aspects.Finally, the Paper explores that the dynamic test procedure is simulated by using the H-J-C model of concrete to obtain the split specimen's failure modes, but there are still many deficiencies and defects. |
