Experimental study on the dynamic compressive properties of concrete and the application analysis

Uniaxial dynamic compressive tests of two kind of concrete specimens are carried out on MTS with different strain rates.The effect of strain rates on compressive strength,elastic modulus and compressive stress-strain curve of concrete are studied systematically.The formula of concrete compressive strength under the effect of strain rates is established.Using finite element method,the structure dynamic response analysis of a simply supported beam was done in this paper.The results show that the compressive strength and elastic modulus of concrete increases with the strain rate increasing,the stress-strain curves under dynamic loads is similar as that under static loads.Under dynamic loads,the stress wills redistribution in the beam.Strain rates have a significant effect on the structure dynamic response.The dynamic loads effect analysis should be considered in the concrete structure design.