Dynamic Splitting Tensile Strength of SFRC An Experimental and Numerical Investigation

Reported are a series of dynamic splitting tensile tests on 70 mm diameter concrete and steel fiber reinforced concrete specimens at moderate strain rates. A modified split Hopkinson pressure bar was developed to test such large diameter heterogeneous specimens. The paper presents details of the modified SHPB and a novel striker bar. The study obtained a dynamic strength magnification of up to 4.5 times the static strength at moderate strain strength. Hooked end steel fibers were used with 0.3% fiber volume concentration for the SFRC specimens. The paper presents and discusses the numerical simulation of the test.