Fundamental Study on Shape Dependency of Input Energy for Failure

This paper describes a comparison of input energy for failure between experimental models. Recently, understanding ultimate fatigue endurance in strong earthquakes is strongly required in order to improve seismic safety reliability. We have dealt with this issue from the viewpoint of the energy balance equation, and already confirmed relations between input energy and fatigue failure by a previous paper. However the confirmed relations were qualitative, so that a quantitative investigation is required. Therefore this paper deals with another experimental model that has 4 times as big width as the previous model. Input energy for failure is investigated by vibration experiment using random wave. As a result, same relations as the previous paper are confirmed. Then relations are expressed by power function, and are compared with the previous model. Consequently the rectangle model requires input energy which is about 4 times bigger than the square model.