Experiment on Response Characteristics of A Single-Story Structure with Mass Asymmetry in the Vibration Direction Accompanied by Uplift and Its Seismic Response Prediction

Abstract

In this paper, free vibration and shake table tests of uplifting structures with asymmetry due to mass eccentricity are conducted. The effect of asymmetry on response with uplifting is experimentally examined. Moreover, a formula based on the balance of energy in the undamped free vibration in an uplifting excursion is modified and applied to estimate the maximum force, and the correspondence with the test results is confirmed. It is shown that rocking angle and story shear coefficient are shifted to positive or negative side due to asymmetry in the structure, and that the prediction by undamped free vibration theory roughly corresponds to the trend of test results even in asymmetric uplifting structure.