EFFECTS OF INPUT DIRECTION OF GROUND MOTION AND COLUMN OVERDESIGN FACTOR ON SEISMIC RESPONSE OF 3D STEEL MOMENT FRAMES WITH SQUARE TUBE COLUMNS

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  • CHAN Iathong
    Grad. stud., Dept. of Architecture and Architectural Engineering, Kyoto Univ., M. Eng.
  • KOETAKA Yuji
    Assoc. Prof., Dept. of Architecture and Architectural Engineering, Kyoto Univ., Dr. Eng.
  • SUITA Keiichiro
    Prof., Dept. of Architecture and Architectural Engineering, Kyoto Univ., Dr. Eng.

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  • 角形鋼管柱を有する鋼構造立体骨組の地震応答に及ぼす入力方向と柱梁耐力比の影響
  • カクガタ コウカン チュウ オ ユウスル コウ コウゾウ リッタイ ホネグミ ノ ジシン オウトウ ニ オヨボス ニュウリョク ホウコウ ト チュウリョウ タイリョクヒ ノ エイキョウ

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Abstract

 This paper presents a numerical study on 3D steel moment frames with square tube columns. The major parameters are column overdesign factor, shapes of the frames and input direction of ground motion. From the analysis, it is revealed that the relationships between cumulative plastic deformation of columns and column overdesign factor are not affected by the shapes of frames but influenced by amplitude and input direction of ground motion and width-thickness ratio of columns. The required column overdesign factor to keep the damage of columns below the limit of plastic deformation is proposed under the reliability index of 2.0.

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