The damped outrigger system is in widespread use as a damping modification for tall buildings that provides high additional addition to the bending back effect against core. However, while enhanced seismic performance of systems was confirmed previous studies all over world, general-purpose optimal design method focusing on modal ratios has not been established yet. This paper proposes an dampe...

In recent years, the Tuned Mass Damper with inerter (TMDI) has received significant attention. The is defined to exert a force that in proportion relative acceleration of two terminals. Here, TMDI topologies are investigated. conventional topology given by being parallel spring and viscous damper TMDI. other serial arrangement spring, stiffness mass oscillator While first intends increase inert...

Residual vibrations in machine tools hamper accuracy and productivity. The attenuation of residual has been an industrial concern for decades. Meanwhile, the vibrations' vibration pattern reveals that support foundation's damping capabilities predominantly influence them. Therefore, inserting dampers any other location on a tool (such as column) is ineffective. Hence, scope damper into foundati...

Abstract In the paper, nonlinear vibrations of a system with three degrees freedom having spherical pendulum are considered. The comprises mass element suspended from linear spring and viscous damper, swung element. It is assumed that fractional damping occurs in damper at pivot point. viscoelastic properties to be described using Riemann–Liouville derivative. derivative an order $$ 0 < \alp...

When the actual displacement of viscous damper exceeds stroke limit, excessive pounding force may be generated, resulting in damage to damper. To address this issue, a novel with variable stiffness, simple processing, and good economy is proposed. First, load-displacement relation established through theoretical analysis experimental studies. Second, numerical simulations series parametric anal...

Seismic resilience is the residual capacity of a damaged system for recovering and sustaining an acceptable level performance as consequence seismic event. Firstly, this paper summarizes current calculation framework using fragility analyses. After that, new metric based on vulnerability analyses developed to calculate resilience. Finally, typical hospital building adopted single then retrofitt...