Review of literature in the field of soil-pile raft-structure interaction indicates that considerable research effort was rendered towards to achieve accuracy in dynamic soil structure interaction (DSSI) model. Interestingly, limited results are available for design response of whole structural system. It is relevant to mention that pile damage (bending) has become a cause of distress in structures. In this context, an effort is devoted in the present paper to see whether DSSI have an adverse effect on elastic as well as inelastic behaviour in superstructure and foundation. This becomes possible through adopting a simplified substructure based DSSI modelling approach. Main focus of the present work is nonlinear seismic response of the whole structure with emphasis on consideration of material nonlinearity in both pile and soil which may contribute in salient design inputs towards performance based design of the whole structural system. Study reveals that consideration of DSSI condition results in inelastic deformation of superstructure and it exhibits marginal increase at higher stories. On the other hand significant increase in deformation at ground storey columns is observed if pile is restricted to deform within elastic range. In fact, initiation of smaller inelastic deformation of pile will lead to further increment in storey displacement, while such storey deformation will gradually decrease with higher inelastic range of deformation in piles and may be beneficial for superstructure system. Hence, designing of pile members with high ductility may reduce the seismic risk of failure of superstructure system. This physical insight may be an important consideration for performance based seismic design of structures.

土-桩-筏-结构相互作用领域的文献综述表明，为实现动态土壤结构相互作用（DSSI）模型的准确性，已进行了大量研究工作。有趣的是，有限的结果可用于整个结构系统的设计响应。值得一提的是，桩的损坏（弯曲）已成为结构困扰的原因。在这种情况下，本文致力于研究DSSI是否对上层建筑和基础中的弹性和非弹性行为产生不利影响。通过采用基于简化子结构的DSSI建模方法，这成为可能。本工作的主要重点是整个结构的非线性地震响应，重点是考虑桩和土中材料的非线性，这可能有助于显着的设计输入，从而有助于整个结构系统的性能设计。研究表明，考虑DSSI条件会导致上层建筑发生非弹性变形，并且在较高楼层其边际增大。另一方面，如果桩被限制在弹性范围内变形，则可以观察到地上柱的变形显着增加。实际上，较小的桩的非弹性变形的开始会导致层的位移进一步增加，而随着桩的变形的较高非弹性范围，这种层的变形将逐渐减小，这可能对上部结构系统有利。因此，高延性桩构件的设计可以降低上层建筑系统失效的地震风险。这种物理洞察力可能是基于性能的结构抗震设计的重要考虑因素。