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EXPERIMENTAL STUDY ON DYNAMIC COMPRESSIVE PROPERTIES OF CONCRETE EXPERIENCED LOADING HISTORY

Sun Ji-shu

Abstract

In order to study the impact of the loading history of dynamic compressive properties of concrete,compressive experiments of concrete specimens(C30) experienced a 30% ultimate compressive strength loading history are carried out on MTS,with the uniaxial strain rate ranging from 10-5/s to 10-2/s.The test results show that after the loading history,the dynamic compressive properties of concrete has a certain degree of change;compared with the direct load,the average ultimate compressive strength and elastic modulus of concrete would decrease after the loading history,but the peak strain did not change significantly;compressive strength and elastic modulus would increase with the strain rate increasing,but the peak strain is just the opposite.

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Key concepts: Compressive strength, Materials science, Composite material, Strain rate, Elastic modulus, Modulus, Properties of concrete, Structural engineering