Kinematic interaction analysis of individual soil-pile model within multi-block system

The influence of single and multi-block structural system on the response of piles in layered soil profiles is investigated in this study. The dynamic soil pile interaction analyses are carried out in three consecutive steps for single/separate and multi-block/complete models. In the first step, 1-dimensional and 3-dimensional linear site response analyses are performed to calibrate the soil domain using parametric analyses using different lateral dimensions. In the second step, the material model parameters of soil are calibrated against experimental tests and analytical model results using modulus degradation and damping curves. Later, 1D and 3D nonlinear site response analyses are compared to verify the soil domain. In the final stage, soil pile kinematic interaction analyses of single and multi-structure system are carried out. The results of separate and complete models are compared in each step. The non-reflective boundaries at the bottom and lateral boundaries are adopted in the 3D model. Ramberg-Osgood material model is utilized to represent nonlinear soil behavior. The kinematic analysis results emphasize that the moments and shear forces at the pile head are much higher in separate models than in complete models. •The study investigates the kinematic analysis responses of a multi-block structural system with different pile lengths.•Considering dynamic SPSI, it offers a way to design and optimize soil dimensions within 3D models.•The study highlights the conservative nature of individually analysing structures within multi-block systems.•It elucidates the spatial specificity of peak responses at the pile head, predominantly manifesting in corner or edge piles.