LOADING RATE EFFECT ON RESTORING FORCE CHARACTERISTICS OF REINFORCED CONCRETE MEMBERS

Dynamic and static loading tests of reinforced concrete member (RC member) have been carried out and the loading rate effect on the restoring force of it is obtained from the differences between the dynamic and static test results. On the basis of the test results the loading rate effect equation which is expressed by the plastic deformation and the accumulated plastic deformation of member is proposed. The dynamic restoring force model of RC member under seismic load is also derived by applying the loading rate effect equation to the static restoring force model. It is ascertained that the presented dynamic restoring force model is useful by comparing it with the dynamic loading test results.