SBHSによる鋼十字断面柱に対する熱履歴付与および単調圧縮載荷実験

抄録

A heating experiment assuming a bridge fire was conducted on cruciform columns assembled by SBHS400, SBHS500, and SBHS700. The lower parts of the columns were locally heated up to 600 ℃ and 900 ℃ and rapidly cooled by water. After the heating experiments, the monotonic compressive loading experiments were performed. The elastic stiffness of the heated columns became lower than that of the sound column according to the magnitude of the out-of-plane deformation by the heating. The ultimate compressive strengths of the heated columns were reduced by the change in mechanical properties due to the heating over the A1 transformation point, regardless of the cooling methods.