SLIDING OF NEARSHORE RIGID FOUNDATION OF LOW BEARING PRESSURE ON MUD STONE DURING EARTHQUAKES

In case of construction of gravity structures in nearshore space, it is an important problem whether the structure slides or not during earthquakes owing to its buoyant force. This paper firstly describes the results of shaking table tests to investigate the sliding phenomena between the gravity structure model and mud stone during excitation. Secondly the characteristics of coefficients of static and dynamic friction at the contact surface between concrete and mud stone were studied using the direct shear testing apparatus. Furthermore, several numerical simulations of shaking table tests were performed by introducing the constitutive relation based on the experimental results.