STUDY ON DUCTILITY DEMANDS OF STEEL BEAMS WITH HAUNCHES AND REDUCED SECTIONS

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  • MUKAIDE Seiji
    Div. of Global Architecture, Graduate School of Eng., Osaka Univ.
  • TADA Motohide
    Div. of Global Architecture, Graduate School of Eng., Osaka Univ.
  • KOHZU Isao
    Div. of Global Architecture, Graduate School of Eng., Osaka Univ.

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  • 鋼構造ハンチ付き梁およびRBS梁の必要変形性能に関する研究
  • コウ コウゾウ ハンチ ツキ ハリ オヨビ RBS ハリ ノ ヒツヨウ ヘンケイ セイノウ ニ カンスル ケンキュウ

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Abstract

It is crucial to establish method evaluating ductility demand of beams for seismic design of structures. However, there are few studies on the demand of haunched beams and reduced section beam (internal plastic hinge beams) in steel moment resisting frames subjected to severe earthquakes. This paper proposes a damage prediction method of internal hinge beams based on energy equilibrium, and confirms applicability of the method. By applying the proposed method, the difference in damage between internal hinge beams and ordinary beams has been quantitatively clarified, and it can be concluded that the ductility demand of the former beams is not more than the the demand for the latter beams.

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