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Title |
Seismic Capacity of Non-seismic Designed RC Framed Building Retrofitted by Double I-type Metallic Damper
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Authors |
허무원(Moo-Won Hur) ; 천영수(Young-Soo Chun) ; 황재승(Jae-Seung Hwang) ; 김종호(Jong-Ho Kim) |
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DOI |
http://dx.doi.org/10.11112/jksmi.2015.19.6.010 |
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Keywords |
더블 I형 이력 감쇠장치 ; 강도저하 ; 강성저하 ; 에너지소산면적 ; 보강된 Double I-type Hysteretic damper ; Strength degradation ; Stiffness degradation ; Energy dissipation ; retrofitted |
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Abstract |
In this study, to examine seismic reinforcement effect of a school building constructed prior to application of seismic design, a Double I-type damper supported by wall was installed to perform comparative analysis on existing non-seismic designed RC frame. As a result of experiment, while non-seismic designed specimen showed rapid reduction in strength and brittle shear destruction as damages were focused on top and bottom of left and right columns, reinforced specimen showed hysteretic characteristics of a large ellipse with great energy absorption ability, exhibiting perfectly behavior with increased strength and stiffness from damper reinforcement. In addition, as a result of comparing stiffness reduction between the two specimens, specimen reinforced by shear wall type damper was effective in preventing stiffness reduction. Energy dissipation ability of specimen reinforced by Double I-type damper was about 3.5 times as high as energy dissipation ability of non-reinforced specimen. Such enhancement in energy dissipation ability is considered to be the result of improved strength and deformation.
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