effect of soil characteristics on the rocking of ‎foudations

Rocking of shallow foundations is a consequence of soil-structure interaction, in which the base of the foundations subjected to strong vibration may separate from the underneath soil by rotating about the longitudinal axis. in this rotational mode, plastic hinge spreads in the underlying soil instead of the main elements of the structure such as columns, thereforeprevents a catastrophic collapse of the structures during strong vibrations; however, resulting in residual deformation in the soil and permanent displacement of the foundation. rocking of shallow foundation is an intricate phenomenon, and its results including displacement time history of the foundation, amount of mobilized moment and dissipated energy,are dependent on several factors such as specifications of the underlying ground, properties of the foundation and the superstructure and characteristics of inducing vibration.