Multi-objective optimal design and seismic assessment of an inerter-based hybrid control system for storage tanks

Abstract

In this paper, a hybrid control system (HCS) endowing a base isolation system (BIS) with a Tuned Mass Damper Inerter (TMDI) is proposed for the protection of steel storage tanks from severe structural damages induced by seismic events. Among all the components of industrial plants, cylindrical steel storage tanks are widely spread and play a primary role when subjected to seismic hazard, since they suffer of many critical issues related to their dynamic response such as high convective wave height and base shear force. The adopted base isolation system is realized with spring and damper elements, whereas the TMDI is realized with a tuned mass damper connected to the ground by the inerter. The developed mechanical model consists of a MDOF system, which considers the impulsive and convective modes as well as the TMDI dynamics. An optimal design problem is tackled, making use of a multi-objective approach, with the scope to mitigate simultaneously the convective and impulsive response of the storage tank. A zero mean white noise excitation is assumed as input in the optimal design procedure. Once the HCS is optimally designed, a systematic investigation of its seismic effectiveness is reached through parametric analysis. Modal parameters and frequency response functions are discussed. A literature case study comparing the effectiveness of the proposed optimally designed HCS with traditional base isolation is illustrated and performances are assessed through stochastic excitation and natural earthquakes.

State-of-the-Art Review on the Seismic Performance Assessment of On-Ground Steel Cylindrical Tanks

“…For instance, Rawat and Mastagar investigated the application of oblate spheroid base isolators on the seismic response of tanks [136,137]. Some other researchers studied the application of different arrangements of inerter base isolators to control the seismic response of liquid storage tanks [138][139][140][141]. In addition, several other researchers have focused on utilizing various types of dampers on base-isolated liquid storage tanks [142][143][144][145].…”

Wave-induced vibration control of Floating production storage and offloading systems by tuned mass damper inerter

“…The viscous mass damper has an inerter and an inner tube coated with viscous fluid connected with a ball screw. Another hybrid control system with base isolation and TMDI was proposed by Labaf et al (2022) for mitigating seismic-induced severe structural damage of steel storage tanks. A comparative vibration control study of the base-isolated water tank equipped with linear viscous damper, viscous mass damper and negative stiffness damper subjected to seismic isolation was carried out by Zhu et al (2023).…”

Earthquake Natech Risk: Numerical Analysis of Floating Roof and Sealing System in Cylindrical Storage Tanks

“…Indeed, some proposals for monitoring have already been made in [18], so models that describe the horizontal dynamics of the roof would be used to estimate some risk thresholds for the activation of early warning systems. In addition, some efforts have already been made in the field of passive seismic protection of industrial components [19], and in particular of the floating roof by Zahedin Labaf et al in [20], in which a hybrid control system is proposed, where a base isolation system is equipped with a tuned mass damper inerter. This system was experimentally tested in [21].…”