A Study on Impact Compressive Strength of Axial Loaded Concrete Specimen

摘要

The purpose of this paper is to judge impact property of axial loaded concrete or mortar specimens, when they are subjected to impact compressive force by a drop weight impact testing machine. Brief of these experimental results are as followes. (1) There is a correlation between impact fracture energy and statical strain energy of the specimens without reference to axial load. (2) Residual strength ofaxial loaded specimens begin to drop down over the critical impact level, then impact fracture energy and impact fatigue strength are both lower than that of un-loaded specimens. (3) Stress-strain curve of the specimen in impact fatigue test changes with increase of repeat number and showes the same process as compressive fatigue test.