既設橋梁の溶接部の疲労寿命向上及びき裂補修のための方法

Japanese Patent JP7365095

B2

To improve a fatigue life of a weld zone in an existing bridge and efficiently repair a crack existing in the weld zone.SOLUTION: A method for improving a fatigue life of a weld zone 60 in an existing bridge and for repairing a crack C in the weld zone therein is disclosed. The method includes: determining whether there is the crack C in the weld zone 60 or not; performing peening processing on the weld zone 60 when there is not the crack C in the weld zone 60; determining whether the crack C falls within a range of a predetermined reference or not when there is the crack C in the weld zone 60; performing peening treatment on the weld zone 60 including the crack C when the crack C falls within the range of the predetermined reference; and determining, after performing peening processing, whether a shape of an indentation formed by the peening processing satisfies a predetermined reference or not.SELECTED DRAWING: Figure 3

Hiroshi Shimanuki
Tomonori Tominaga
Kenichiro Uesaka
Hideo Tokita
Takashi Masui
Shuichi Hirano
Takeshi Mori
Daisuke Uchida

JP2019141245A

October 19, 2023

July 31, 2019

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Nippon Steel Corporation
Metropolitan Expressway Technology Center
Shuto Expressway Co., Ltd.
Shutoko Maintenance West Tokyo Co., Ltd.
Shutoko Maintenance East Tokyo Co., Ltd.
Shutoko Maintenance Kanagawa Co., Ltd.

B23K31/00; C21D7/06; E01D1/00; E01D22/00

JP2010125534A
JP2017150234A
JP2018012190A
JP2003113418A

Atsushi Aoki
Shinji Mihashi
Ritsuo Fukuchi
Manabu Saito
Shinji Square

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