KINEMATIC INTERACTION OF STRIP EMBEDDED FOUNDATION WITH INCOMPLETE CONTACT BETWEEN SIDEWALL AND SURROUNDING SOIL

In the field of soil-structure interaction (SSI), Kinematic Interaction (KI) can potentially be a source of notable influences on structure dynamic response. Such influences take place through alternation in foundation input motion. In this paper, first the effect of KI on input motion for the case of single rigid strip embedded foundation with incomplete contact between sidewall and nearby soil, under vertical propagation of shear waves is investigated. Then it is discussed that how this input-change would be reflected in response spectrum. Results for different embedment depths and various soil-wall contact lengths of foundation are depicted. In this research, numerical analysis was conducted by ABAQUS, finite element software. It is shown that for high frequencies of excitation, significant intensification of input motion would be expected, as besides horizontal input, a rotational component will be generated because of embedment depth. Also it seems, an optimum sidewall contact length can be found through which, minimum ordinates of input motion would excite soil-structure systems.

Keywords:

Kinematic Interaction , Incomplete Contact , Response Spectrum , Numerical Analysis , Strip Foundation