ABSTRACT
Inerter-centered structural vibration control techniques have been popular over the past 20 years. A two-terminal device known as an inerter can produce a force equal to the product of the difference in relative acceleration between the two terminals and the inertance constant. This study incorporates a supplemental device known as a clutching inerter (CI) to numerically investigate the seismic response of a base-isolated (BI) liquid storage tank subjected to real-time earthquake excitations. The isolation device considered is a laminated rubber bearing (LRB). Furthermore, a MATLAB code using the state-space method has been developed to determine the response quantities: sloshing displacement, sloshing acceleration, bearing displacement, and normalized total shear force. The time variation of the response quantities of the BI tank with and without supplemental CI is examined. The hybrid system (LRB + CI) works together to reduce the bearing displacement and sloshing displacement response. The CI adds the sloshing acceleration response, which is a concern. This can be remedied by reducing the total base shear and establishing the CI’s effectiveness.
