EFFECTS OF THE INERTIA AND KINEMATIC INTERACTIONS ON DYNAMIC BEHAVIOR OF THE ISOLATED BRIDGE

Abstract

In this research, contributions of inertia and kinematic interactions to the dynamic behavior of an isolated structure are studied. Two layered soil conditions with different heights and shear velocities are prepared, kinematic interaction of that are regarded as negligible in the currend design standart. Also, a combined model representing the behaviors of free-field soil, piles and surrounding soil and upper structures is employed for numerical simulations. It is clarified through series of simulations that displacements of the free-field layered soils significantly affect the maximum moment distribution of the isolated structure, despite the inertial interaction is relatively small due to the isolation bearings. It consequently follows that effect of the kinematic interaction should be properly considered even under good soil conditions.