effect of high-rise structure characteristics on the ‎rocking of foudations

Rocking of shallow foundation that is a ramification of soil structure interaction has been recently considered by many researchers and earthquake geotechnical performance-based design (pbd) codes. these researches signified the importance of this most unintentional phenomenon in amelioration seismic performance of structures. elongation of thenatural period of the soil-structure system, a decrease in both base shear and ductility demands of superstructures can be named as advantages of this rotational mode; however, unpredictable displacement of the foundation and residual settlement and/or tilting of the foundation concern engineers to allow the base separates from the contacted ground, therefore the ability of realistically modeling the rocking responses of the soil structure interaction is a necessity inthis respect. in addition, the responses of soil-structure interaction like settlement, rotation, mobilized moment and dissipated energy and correlation between these results, are completely intricated, e.g. the nonlinearity of rotation-moment relationship is dependent straightly on several factors including the amount of rotation of foundation, the nonlinear behavior of underlying soil, the static factor of safety of foundation (gaztes et al., 2013), as well, there are some parameters such as the height and the width of structure, in the same vibration, indirectly lead to some significant alterations in the rotation-moment relationship and the other responses of rocking.