Numerical and experimental analysis of combined behavior of shear-type friction damper and non-uniform strip damper for multi-level seismic protection

Chang Hwan Lee, Jinkyu Kim, Do Hyun Kim, Jaeho Ryu, Young-Kyu Ju

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

A new hybrid damper which combines a friction damper and steel strip damper is proposed for improving the seismic performance of structures at multiple levels of ground motion. In order to investigate the combined behavior of the proposed damper, quasi-static cyclic tests were carried out on ten specimens. Experimental results demonstrated that hysteretic response was stable, and multi-phased behavior (i.e., activation of two different kinds of dampers) functioned as intended. However, depending on the type of strip damper applied, the behavior and failure modes showed distinct differences due to rotational motion induced during combined behavior deformation and energy dissipation capacities were enhanced when a strip damper with adequate out-of-plane stiffness was applied. Furthermore, numerical analysis based on both material strength and expected strength well represented behavioral characteristics of the damper, and dissipated energy was reliably predicted. It is expected that the proposed analytical model can be practically applied to predict the performance of structures strengthened by the hybrid damper.

Original languageEnglish
Pages (from-to)75-92
Number of pages18
JournalEngineering Structures
Volume114
DOIs
Publication statusPublished - 2016 May 1

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Failure modes
Numerical analysis
Analytical models
Energy dissipation
Chemical activation
Stiffness
Friction
Steel

Keywords

  • Combined behavior
  • Cyclic loading
  • Energy dissipation
  • Friction damper
  • Hybrid damper
  • Metallic damper
  • Out-of-plane behavior
  • Passive control system

ASJC Scopus subject areas

  • Civil and Structural Engineering

Cite this

Numerical and experimental analysis of combined behavior of shear-type friction damper and non-uniform strip damper for multi-level seismic protection. / Lee, Chang Hwan; Kim, Jinkyu; Kim, Do Hyun; Ryu, Jaeho; Ju, Young-Kyu.

In: Engineering Structures, Vol. 114, 01.05.2016, p. 75-92.

Research output: Contribution to journalArticle

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AU - Ryu, Jaeho

AU - Ju, Young-Kyu

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AB - A new hybrid damper which combines a friction damper and steel strip damper is proposed for improving the seismic performance of structures at multiple levels of ground motion. In order to investigate the combined behavior of the proposed damper, quasi-static cyclic tests were carried out on ten specimens. Experimental results demonstrated that hysteretic response was stable, and multi-phased behavior (i.e., activation of two different kinds of dampers) functioned as intended. However, depending on the type of strip damper applied, the behavior and failure modes showed distinct differences due to rotational motion induced during combined behavior deformation and energy dissipation capacities were enhanced when a strip damper with adequate out-of-plane stiffness was applied. Furthermore, numerical analysis based on both material strength and expected strength well represented behavioral characteristics of the damper, and dissipated energy was reliably predicted. It is expected that the proposed analytical model can be practically applied to predict the performance of structures strengthened by the hybrid damper.

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