ESTIMATION OF SHEAR AND AXIAL FORCE FOR STEEL COLUMN JOINTS AND SEISMIC STRENGTH OF MULTI-STORY STEEL MOMENT RESISTING FRAMES WITH NEW COLUMN SUPPORT SYSTEM

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  • KIMURA Yoshihiro
    Prof., New Industry Creation Hatchery Center, Tohoku University, Dr. Eng.
  • KANEDA Katsunori
    Structural Design PLUS ONE Co., Ltd., Prof., Nihon University, Dr. Eng.
  • WADA Akira
    Prof. Emeritus, Tokyo Institute of Technology, Dr. Eng.

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  • 新しい柱脚機構を有する鉄骨ラーメン骨組の終局耐震能力及び鉄骨柱支点部の作用力の算定法
  • アタラシイ チュウ キャク キコウ オ ユウスル テッコツ ラーメン ホネグミ ノ シュウキョク タイシン ノウリョク オヨビ テッコツ チュウ シテンブ ノ サヨウリョク ノ サンテイホウ

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Abstract

In the steel frames, the column base is allowed to yield after beam yielding subjected to large earthquake in Japanese design codes such as &ldauo;The Building Standard Low of Japan” by Building Center of Japan. If the frames have unexpected seismic horizontal force, the soft story mechanism may occur. To prevent the plastic collapse of the column on 1st story, our previous paper suggested the new column support system on 1st story, which consist of the reinforced concrete downside column and the steel topside column. In this paper, the virtual work method is applied to estimate the damage distribution and the collapse deformation capacity of the steel moment resisting frames with these support systems, and the shear and axial demands the column joints on 1st story are clarified.

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