Impact of soil–structure interaction on structures with inerter system

Abstract Until now, the influence of soil–structure interaction (SSI) on structures equipped with an inerter system has been neglected in research studies. This study aims at investigating the impact of SSI on the dynamic response of such structures and explores a rather effective method for designing structures equipped with an inerter system. First, the parameters of the inerter system were obtained using the improved fixed-point method, and the foundation characteristics were derived from the classical sub-structure model. Then, dynamic responses of the structure, both with and without the sub-structure model, were comparatively evaluated through frequency- and time-domain analyses. It was found that structures with an inerter system demonstrate an increased dynamic response under the influence of SSI. In addition, structures equipped with an inerter system and designed using conventional methods are potentially unsafe. Hence, the parameter optimization of the inerter system should be performed with due consideration of the SSI effects. The dynamic response of structures equipped with an inerter system is found to be reduced when new inerter parameters obtained from the simulated annealing algorithm are applied. The results of the analyses demonstrate that SSI effects must be considered in the case of structures equipped with an inerter system and standing on flexible soil. Considering the SSI effects, an optimization algorithm, such as the simulated annealing algorithm, can be used to obtain design parameters of the inerter system, thereby more effectively reducing the dynamic response of structures equipped with an inerter system.

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