Innovative dissipative devices with tensegrity architecture and super elastic behaviour for the seismic protection of structures

Nidhita Singh, Ada Amendola, Filipe Santos, Gianmario Benzoni, Fernando Fraternali

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The present paper deals with the design and the mechanical modeling of a seismic bracing system with tensegrity architecture, which operates as a lightweight mechanical amplifier for longitudinal displacements, efficiently limiting the inter-story drifts while dissipating energy. The proposed brace is based on a D-bar tensegrity structure with rhomboidal shape comprising Shape-Memory Alloy (SMA) tendons. The SMA tendons can develop austeniticmartensitic (solid to solid) phase transformations, which enable them to amplify the signals into wide super elastic hysteresis, while subjected to mechanical cycles, comprising strains up to ≈6-7%, with no residual deformations. The underlying concept of the proposed device is the use of SMA wire sections as the dissipating component, and some preliminary results have been presented in previous studies. Enhanced energy dissipation and re-centering capability of the current SMA-D-bar (SMAD) braces are illustrated by the seismic analysis of a benchmark structure. The efficiency of the designed bracing to minimize the seismic damage of the served structure paves the way for the development of advanced seismic energy dissipation systems incorporating tensegrity concepts and superelasticity.

Original languageEnglish
Title of host publicationEURODYN 2020 - 11th International Conference on Structural Dynamics, Proceedings
EditorsManolis Papadrakakis, Michalis Fragiadakis, Costas Papadimitriou
PublisherEuropean Association for Structural Dynamics
Pages3079-3085
Number of pages7
ISBN (Electronic)9786188507210
Publication statusPublished - 2020
Event11th International Conference on Structural Dynamics, EURODYN 2020 - Virtual, Athens, Greece
Duration: 23 Nov 202026 Nov 2020

Publication series

NameProceedings of the International Conference on Structural Dynamic , EURODYN
PublisherEuropean Association for Structural Dynamics
Volume2
ISSN (Print)2311-9020

Conference

Conference11th International Conference on Structural Dynamics, EURODYN 2020
CountryGreece
CityVirtual, Athens
Period23/11/2026/11/20

Keywords

  • Bracing systems
  • Energy dissipation devices
  • Seismic motions
  • SMA

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