Seismic Performance of the Inerter and Negative Stiffness–Based Dampers for Vibration Control of Structures

Naqeeb Ul Islam,R S Jangid

doi:10.3389/fbuil.2021.773622

Naqeeb Ul Islam, R S Jangid

Open Access

https://doi.org/10.3389/fbuil.2021.773622

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Abstract

Passive energy dissipation devices or supplemental damping devices have been successfully implemented into structures for controlling the excessive vibrations under wind and seismic excitation. Recent developments in the form of negative stiffness dampers (NSDs) and inerter-based vibration absorbers (IVAs) as potential energy dissipation devices are of considerable interest to researchers. The present study evaluates the performance of the combined NSD and IVA as a possible alternative to the traditional energy dissipation devices such as viscous dampers (VDs) and viscoelastic dampers (VEDs). The mathematical formulation and optimal design of the combined NSD and IVA mechanism are presented. A 20-storey benchmark building is modeled as a multi-degree-of-freedom (MDOF) shear building. The dynamic equations for the MDOF building are written in the state-space form, and a simple optimization approach based on effective modal damping is prescribed. Comparative performance between traditionally applied and novel IVA and NSD is investigated. The design considerations to analyze structures employing combined NSDs and IVAs are developed. It is demonstrated that NSDs and IVA-based passive energy dissipation devices are the most efficient devices in reducing inter-storey drifts and floor accelerations compared with VDs and VEDs using the same damping coefficient.

Highlights

Vibrations induced to a structure due to different kinds of dynamic loading such as winds, earthquakes, or vibrating machinery need special design steps for mitigating the adverse effects
The present study evaluates the performance of the combined negative stiffness dampers (NSDs) and inerter-based vibration absorbers (IVAs) as a possible alternative to the traditional energy dissipation devices such as viscous dampers (VDs) and viscoelastic dampers (VEDs)
The present study evaluates the performance of negative stiffness inerter damper (NSID) and NSD as possible alternatives to traditional energy dissipation devices such as viscous dampers (VDs) and viscoelastic dampers (VEDs)

Summary

Introduction

Vibrations induced to a structure due to different kinds of dynamic loading such as winds, earthquakes, or vibrating machinery need special design steps for mitigating the adverse effects. Traditional strength-based or ductility-based design methods have limitations of higher construction cost and permanent damage to the structures. Due to these limitations, researchers have developed intelligent structure systems or structural control systems (Cheng et al, 2008; Saaed et al, 2015). A “structural control device” or “control system” is a mechanical system that operates to alter the structural response. This modification of system response is based on design consideration, and the output is desirable in other structures without any control device. Based on the operation style, control devices are classified into four main categories: passive control devices/ system, semi-active control devices/systems, active control devices/systems, and hybrid control devices/systems

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