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RISS 인기검색어
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- 저자 : Osman Hansu (검색결과 1 건)
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Ahmet Hilmi Deringöl,Esra Mete Güneyisi,Osman Hansu 한국강구조학회 2022 International Journal of Steel Structures Vol.22 No.5
Recently, the base isolation system (BIS) has been adopted as mature structural protective system which dissipates the most part of the input energy emerged during any type of seismic excitation. However, BIS can induce large displacement because of having easily movement tendency of the bearing. Therefore, this study proposes a set of BIS incorporated with supplementary damping device to control the nonlinear response of the buildings with low and moderate heights. For this, 5 and 10-storey steel moment resisting frames isolated with lead rubber bearing (LRB) with varying stiff ness properties (i.e. high, moderate, and low) were studied. Afterwards, viscous damper (VD) was designed with three diff erent damping exponents of 0.3, 0.6, and 1.0 so that they were alternatively distributed both in inner and corner bays throughout the building heights. The eff ectiveness of the proposed isolation models with and without VDs were evaluated through the nonlinear time history analyses under diff erent earthquake records. Advantages of the developed isolation systems over both the fi xed base and the base isolated frames were discussed in terms of the storey, bearing, and relative displacements, roof and interstorey drift ratios, absolute acceleration, base shear, and hysteretic curves. It was shown that low-stiff ness-LRB (LLRB) associated with the VD of proper damping exponent and implementation layout signifi cantly mitigated the structural response of the buildings.
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