鋼構造筋違付多層骨組の塑性設計に関する研究 : その 4 筋違付骨組の地震荷重係数について

抄録

Due to the degrading restoring force characteristics of a bracing member, decrease in ultimate strength and ncrease in displacement response of braced frames subjected to severe earthquake are recognized. Inelastic behavior of braced frames under the seismic loads depends directly on the slenderness ratio of a bracing member (λ) and the ratio of story shear force shared by bracings to total shear force (β). To avoid excessive plastic drift, it is necessary to take the degrading restoring force characteristics of a bracing member into account in the process of designing. This paper describes a procedure to estimate the seismic design load factor as a function of λ and β, and to design strong column-weak beam braced frames.