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RISS 인기검색어
- 검색키워드
- 저자 : S. Garivani (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
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Numerical and Experimental Study of Comb-Teeth Metallic Yielding Dampers
S. Garivani,A. A. Aghakouchak,S. Shahbeyk 한국강구조학회 2016 International Journal of Steel Structures Vol.16 No.1
In this paper, a new type of metallic yielding damper called comb-teeth damper, CTD, is introduced. CTD is made of steel plates and includes a number of teeth that dissipate energy through in-plane flexural yielding. An optimum geometry of teeth is suggested, which assures uniform distribution of stress along them and prevents strain localization. Finite element modeling is used to verify the design of proposed damper and to study nonlinear behavior of the damper subjected to monotonic as well as cyclic loading. Three full scale specimens have also been made and tested under cyclic loading. In order to restrict out-ofplane buckling of damper teeth, a special clamp has been designed. A numerical study has elaborated the effects of these clamps in comparison to increasing the thickness of individual tooth. The tested samples have tolerated considerable cumulative displacement in their hysteresis cycles without any significant loss of strength.
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Seismic Behavior of Steel Frames Equipped with Comb-Teeth Metallic Yielding Dampers
S. Garivani,A. A. Aghakouchak,S. Shahbeyk 한국강구조학회 2019 International Journal of Steel Structures Vol.19 No.4
Comb-teeth damper (CTD), is a new type of metallic yielding damper, which is made of steel plates and includes a number of teeth that dissipate energy through in-plane fl exural yielding. The behavior of individual samples of CTD have been previously studied numerically and experimentally and it has been shown that this damper has excellent energy dissipating capacity and large ductility ratio. In this paper, application of this type of damper to steel frames is studied. Sample steel frames are constructed and equipped with CTDs and tested under cyclic loading. The results show that these dampers can serve their intended duties and dissipate considerable amount of energy. Numerical modelling of the frames confi rms the experimental results and shows that by correct proportioning of the members, frame members i.e. beams, columns and braces remain elastic during lateral loading. This allows using the CTDs as a replaceable energy dissipating device. Finally CTDs are included in a reference frame and their eff ects on reducing seismic demand are studied using non-linear time history analysis. The results show that by using a smaller volume of steel in CTD dampers compared to traditional TADAS, the same level of response reduction may be achieved, while utilizing economic advantage of this type of damper.
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