Seismic response control of bridges with nonlinear tuned vibration absorbers

Said Elias*, Rajesh Rupakhety, Dario De Domenico, Simon Olafsson

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

10 Citations (Scopus)

Abstract

The paper investigates seismic response control of bridges with nonlinear tuned vibration absorbers (n-TVAs). A three-span continuous bridge is used as case study. The n-TVAs are designed to act in both longitudinal and transverse directions of the bridge. The n-TVAs are modelled as inelastic springs with bilinear hysteretic behavior. A simple and effective method to design the parameters of the n-TVAs for controlling structural displacement is presented. The performance of the proposed n-TVAs is compared with the optimum linear TVAs (o-TVAs) and elasto-plastic bilinear TVAs (bn-TVAs). The results show that the n-TVAs are at least as effective as o-TVAs in controlling structural response. Because the n-TVAs do not require additional dashpots like the o-TVAs, they provide a more economical solution. It is observed that although effective in controlling structural response, their stroke is of the same order as that of o-TVAs. Addition of a viscous dashpot to the device is found to reduce their stroke, although accompanied by an inherent detrimental effect on the structural control performance.

Original languageEnglish
Pages (from-to)262-274
Number of pages13
JournalStructures
Volume34
Early online date5 Aug 2021
DOIs
Publication statusPublished - Dec 2021
Externally publishedYes

Keywords

  • Bridges
  • Earthquake engineering
  • Nonlinear tuned vibration absorbers (n-TVAs)
  • Optimum design
  • Structural control

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