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Purpose <p>This paper deals with the multimodal suppression of excessive amplitude vibration in two adjacent buildings of different heights under the sequential nonstationary earthquake excitation. These Buildings are linked through a sky bridge, which is considered as a system of spring and viscous damping elements.</p> Methods <p>The dynamic behaviour of structures is modelled using a set of partial differential equations derived from Timoshenko beam theory. Each adjacent building is equipped with a damped outrigger system that incorporates a vibration absorber known as a Nonlinear Energy Sink (NES).</p> Results <p>As an additional energy dissipation mechanism, this controller is positioned between the inner surface of the perimeter column and the end boundary of the outrigger. A parametric study is performed to examine the effect of key parameters of sky bridge and NES devices on the response behaviour of outrigger-connected structures. Subsequently, Particle Swarm Optimization (PSO) is employed through an objective function to identify the appropriate intrinsic NES parameters for enhanced performance.</p> Conclusion <p>The findings demonstrate that coupling the sky bridge with NES devices considerably improves the structural dynamical response. It follows that this configuration is mechanically advantageous, and can mitigate more than <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(70\%\)</EquationSource> </InlineEquation> of seismic vibration effects.</p>

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Nonlinear Energy Sink Outrigger Control of two interconnected Buildings under earthquake Loads

  • 期刊论文

  • 发表日期：

    2025年11月24日

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  • Buris Peggy Ndemanou,
  • Jules Metsebo,
  • Sifeu Takougang Kingni,
  • Armel Martial Ngounou

摘要

Purpose

This paper deals with the multimodal suppression of excessive amplitude vibration in two adjacent buildings of different heights under the sequential nonstationary earthquake excitation. These Buildings are linked through a sky bridge, which is considered as a system of spring and viscous damping elements.

Methods

The dynamic behaviour of structures is modelled using a set of partial differential equations derived from Timoshenko beam theory. Each adjacent building is equipped with a damped outrigger system that incorporates a vibration absorber known as a Nonlinear Energy Sink (NES).

Results

As an additional energy dissipation mechanism, this controller is positioned between the inner surface of the perimeter column and the end boundary of the outrigger. A parametric study is performed to examine the effect of key parameters of sky bridge and NES devices on the response behaviour of outrigger-connected structures. Subsequently, Particle Swarm Optimization (PSO) is employed through an objective function to identify the appropriate intrinsic NES parameters for enhanced performance.

Conclusion

The findings demonstrate that coupling the sky bridge with NES devices considerably improves the structural dynamical response. It follows that this configuration is mechanically advantageous, and can mitigate more than \(70\%\) of seismic vibration effects.