MODEL SHAKE TABLE TESTS ON SEISMIC RESPONSE OF A RUBBER-TIRED GANTRY CRANE

Abstract

 Although it has been reported that rubber-tired gantry cranes (RTGs) in harbors were not damaged in the 1995 Hyogo-ken Nanbu earthquake, their seismic behavior has not been well clarified yet. Therefore, model shake table tests were conducted to investigate the behavior and stability of RTGs. As a result, although large values of acceleration response were observed in the legs during vibration, large stress of structural member leading to failure were not observed, which is consistent with the fact that no damage was observed in RTGs during the Hyogo-ken Nanbu Earthquake. Although large acceleration response values were observed due to the influence of higher-order modes, the high frequency component was not observed in the member curvature, indicating that the contribution of low-frequency modes was significant.