柱脚浮き上がりを許容した10層鉄骨造架構の3次元地震応答における降伏ベースプレートの応力状態と架構の変形状態

概要

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Internal forces developed in yielding base plates and frame deformation during the seismic response of three-dimensional ten-story steel frames with columns allowed to uplift is examined and evaluated. The results are: 1) The yielding base plates resist the shear forces of first-story columns mainly by their axial forces; 2) The horizontal forces carried by the yielding base plates of uplift bases are smaller than those of non-uplift bases; 3) The internal forces produced in each wing of a yielding base plate are comparatively small when the horizontal forces carried by the yielding base plates reach the maximum value; and, 4) It should be noted that the maximum first-story drift angles of uplift-base models may become larger than those of fixed-base models, associated with the rotation of first-story column bases without the rigid rotation of frame caused by uplift motion.
一般社団法人日本建築学会の論文
2010-03-27