Nonlinear Dynamic Analysis of Lateral Soil Pile Structure Interaction via the Continuum Modeling Approach

Structures equipped with semi-active Tuned Mass Damper (STMD) have recently become popular because of the high efficiency attained against lateral loading. Although it is easy to use, the search for the optimized STMD parameters to mitigate the dynamic response of structures founded on deep foundations is usually complicated. The search for accurate soil-pile-structure interaction (SPSI) estimation has a greater impact on the STMD configuration. The use of lateral load-displacement curves (p-y curves) recommended in the American Petroleum Institute (API) guideline is typically used as a design approach for soil-pile-structure interaction analysis due to its simplicity. The soil-pile-structure interface has two separate parts of interaction; kinematic and inertial interaction. Both types of interaction must be accurately measured for structures with dampers to determine the optimal parameters for design. For structures equipped with semi-active tuned mass dampers (STMD) on a deep foundation, the determination of the optimal STMD characteristics is completely related to the dynamic behavior of the structure. Therefore, in this study, the accuracy of the general p-y equation for buildings with STMD having a short period on deep foundations is first evaluated. Then, the three-dimensional continuum method (finite element method) is used and the general p-y equation is updated to provide compatibility.