Experimental study on dynamic compressive properties of concrete

In order to investigate the mechanical properties of concrete under dynamic loas,compressive experiments of concrete specimens(C40) are carried out on MTS,with the uniaxial strain rate ranging from 10-5 s-1 to 10-2 s-1.The compressive properties of concrete under different stain rates,which include compressive strength,elastic modulus,peak strain and Poisson's ratio,are studied systematically.The effect law of strain rates on the compressive strength,elastic modulus and etc.of concrete are analyzed.The test results indicate that the compresseive strength and elastic modulus of concrete would increase with the strain rate increasing.The discreteness of peak strain and Poisson's ratio are larger,and the effect of strain rate on peak strain and Poisson's ratio are not significant.These research achievements can provide us with a more accurate grasp of concrete dynamic mechanical properties and contribute to build the dynamic compressive constitutive models of concrete.