Flexure Based Energy Dissipating Device in Self-Centering Braces
| Autor: | Anila Xhahysa, Serap Kahraman, Sadik Can Girgin |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
energy dissipation
Materials science Yield (engineering) Self-centering brace UFPs flexure Aerospace Engineering Ocean Engineering Flexural strength medicine General Materials Science Civil and Structural Engineering Tension (physics) business.industry Mechanical Engineering Stiffness finite element modeling Structural engineering Dissipation Brace Hysteresis Buckling Mechanics of Materials Automotive Engineering medicine.symptom business |
| Zdroj: | Latin American Journal of Solids and Structures v.16 n.8 2019 Latin American journal of solids and structures Associação Brasileira de Engenharia e Ciências Mecânicas (ABCM) instacron:ABCM |
| Popis: | Self-centering braces, in the current stage of development can accommodate large deformation and force levels. However, there is still a need for improvement of the energy dissipation mechanisms commonly incorporated in these braces. Yield based energy dissipation systems can overcome some of the problems faced with friction-based devices, such as susceptibility to bolt relaxation, long-term creep of friction material and excessive flexing arising in the outer tubes due to friction bolts. However, in these alternative systems multi-wave buckling of the yielding core is present, which is the leading cause of an asymmetric hysteresis of the brace. Hence, in this study, U-shape flexural plates (UFPs) are analyzed as an alternative energy-dissipating device in real scale self-centering braces with a finite element modeling approach. UFP plates yield in flexure and when comparing to direct tension/compression yielding members, they show lower strain demand, resulting in a larger displacement capacity. Implementation of the UFP units in the brace produces a flag shape hysteresis with minimal residual deformation. The proposed system provides some advantages when compared to previous models in terms of increased redundancy, symmetric hysteresis and a more gradual stiffness change. |
| Databáze: | OpenAIRE |
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