Application of identification methodology to shaking table tests on reinforced concrete columns

Shaking table tests on twelve reinforced concrete model columns are described. The system identification method is used to process the test data and to find the restoring force for the scaled columns at different deformation stages. The analysis shows that a semidegrading trilinear model can be used for the cracking and yielding stages of the reinforced concrete columns, and a semidegrading trilinear model with a descending branch can be used for the failure stage.