Experimental research on dynamic compressive properties of concrete under single-axle repeated loading

With the large static and dynamic electro-hydraulic servo testing system,the single-axle dynamic compressive test with the single-axle repeated loading was carried out on concrete specimens under different stain rate.The test studied the properties of concrete compressive strength,elastic modulus,peak strain and stress-strain curve by varying of strain rate.It shows that the concrete compressive strength is decreased in large amplitude after repeated loading under the same strain rate.The effect of loading history on concrete strength is decreased with the increasing of strain rate.