コンクリートを充てんした鋼製角形柱の鋼板要素の一設計法
1985 年 1985 巻 356 号 p. 405-413
詳細
1985 年 1985 巻 356 号 p. 405-413
In this paper, the ultimate strength of steel plate elements in the concrete filled square steel tubular columns is analyzed by using the F. E. M. based on the elastoplastic and large displacement theory. It is found through numerous parametric analyses that the influence of restrictions due to the concrete core upon the boundary conditions concerning the in-plane displacement of the steel plate element along the unloaded edges is tought to be negligible in an ordinary composite column. Furthermore, it is difficult to prevent the local buckling of steel plate elements by the shear connectors, even when they are sufficiently welded on the plate elements and anchored into the concrete core. A tentative design method is proposed by adopting a simplified ultimate strength curve and a column model approach using an effective stiffener which consists of a plate element and a longitudinal stiffener for unstiffend and stiffened steel plate elements, respectively.
