NUMERICAL STUDY ON CYCLIC ELASTO-PLASTIC BEHAVIOR OF STEEL BRIDGE PIERS OF PIPE-SECTIONS WITHOUT STIFFENERS

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  • Ge Hanbin
    社団法人 土木学会 名古屋大学 大学院工学研究科土木工学専攻
  • Gao Shengbin
    社団法人 土木学会 名古屋大学大学院工学研究科博士課程後期課程
  • Usami Tsutomu
    社団法人 土木学会 名古屋大学 大学院工学研究科土木工学専攻
  • Matsumura Toshio
    社団法人 土木学会 瀧上工業株式会社 橋梁本部技術部

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Other Title
  • 鋼製パイプ断面橋脚の繰り返し弾塑性挙動に関する数値解析的研究

Abstract

The present paper is concerned with an elasto-plastic large displacement analysis of cantilever type of steel pipe-section columns modeling the bridge piers under cyclic loading. A modified two-surface plasticity model recently developed in Nagoya University is employed for material nonlinearity. Comparisons between the analytical and experimental results show that the modified two-surface model can be used to predict the inelastic cyclic behavior of steel structures with good accuracy. A parametric study is then performed to investigate the effects of radius-thickness ratio, slenderness ratio, magnitude of axial load and cycle numbers on the ultimate strength and ductility of the columns. Finally some formulas on load carrying capacity and ductility are presented considering the effects of various parameters.

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