Parametric computational study on butterfly-shaped hysteretic dampers

doi:10.1007/s11709-019-0550-6

Frontiers of Structural and Civil Engineering

2019, Vol. 13

Issue (5): 1214-1226 https://doi.org/10.1007/s11709-019-0550-6

本期目录

Parametric computational study on butterfly-shaped hysteretic dampers

Alireza FARZAMPOUR(

), Matthew Roy EATHERTON(

)

Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA 24060, USA

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Abstract：

A parametric computational study is conducted to investigate the shear yielding, flexural yielding, and lateral torsional buckling limit states for butterfly-shaped links. After validating the accuracy of the finite element modeling approach against previous experiments, 112 computational models with different geometrical properties were constructed and analyzed including consideration of initial imperfections. The resulting yielding moment, corresponding critical shear force, the accumulation of plastic strains through the length of links as well as the amount of energy dissipated are investigated. The results indicate that as the shape of the butterfly-shaped links become too straight or conversely too narrow in the middle, peak accumulated plastic strains increase. The significant effect of plate thickness on the buckling limit state is examined in this study. Results show that overstrength for these links (peak force divided by yield force) is between 1.2 and 4.5, with straight links producing larger overstrength. Additionally, proportioning the links to delay buckling, and designing the links to yield in the flexural mode are shown to improve energy dissipation.

Key words： structural fuse hysteretic damper finite element analysis energy dissipation initial imperfection butterfly-shaped links

收稿日期: 2018-07-17 出版日期: 2019-09-11

Corresponding Author(s): Alireza FARZAMPOUR,Matthew Roy EATHERTON

引用本文:

. [J]. Frontiers of Structural and Civil Engineering, 2019, 13(5): 1214-1226.
Alireza FARZAMPOUR, Matthew Roy EATHERTON. Parametric computational study on butterfly-shaped hysteretic dampers. Front. Struct. Civ. Eng., 2019, 13(5): 1214-1226.

链接本文:

https://academic.hep.com.cn/fsce/CN/10.1007/s11709-019-0550-6
https://academic.hep.com.cn/fsce/CN/Y2019/V13/I5/1214

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