丸鋼鉄筋が用いられたRC橋脚のアンボンド補強鉄筋による耐震補強設計法の検討

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  • A study on seismic retrofitting design method by unbonded reinforcing rebar for RC bridge piers with round rebars
  • 丸鋼鉄筋が用いられたRC橋脚のアンボド補強鉄筋による耐震補強設計法の検討
  • マル コウテツキン ガ モチイラレタ RC キョウキャク ノ アンボド ホキョウ テッキン ニ ヨル タイシン ホキョウ セッケイホウ ノ ケントウ

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As a way of performing rational aseismic retrofitting for RC bridge piers whose rebars are round, we proposed a technique for unbonded the axial rebars, which can be done when RC concrete lining is conducted. It was clarified that the unbonded retrofitting did not inhibit the rocking behavior of the existing round rebars. This study proposes an evaluation method for a seismic retrofitting design for existing RC bridge piers, in which round rebar reinforcement was used. The rocking behavior of the existing round rebars was used in the proposed unbonded retrofitting. The studied evaluation method was based on the rotational angle at the base of the bridge pier, which corresponds to the allowable elongation of the rebars installed in the axial direction.

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