繰り返しせん断を受けるハイブリッド型箱形断面柱の強度および変形性能

概要

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This paper presents an experimental investigation on the hysteretic behavior of stiffened box columns having two or five longitudinal ribs under constant compressive thrust combined with cyclic shear loads at the column top. The low-yield web panels behave like dissipative zones of shear link to resist earthquake actions. Seven specimens are of four square web panels of 450 mm side. Thicknesses of web panels are 3.5mm and 7mm, and thickness of flange is 7mm. The webs are made of mild steel (SM400) or low-yield steel (LY 100 and FLS), and the flanges are made of mild steel. Hysteretic curves in shear are obtained experimentally and compared them for different steel and thickness of web panels. The cyclic shear strength and panel ductility are discussed and compared them from the energy dissipative point.