鋼製橋脚横梁支点直下ダイアフラムの疲労損傷に対する補修・補強検討

穴見 健吾, 溝江 慶久, 八木 貴之, 梶原 仁

doi:10.11532/structcivil.53a.755

鋼製橋脚横梁支点直下ダイアフラムの疲労損傷に対する補修・補強検討

DOI

穴見健吾

高知工科大学　社会システム工学科
溝江慶久

川田工業株式会社　橋梁事業部保全技術課
八木貴之

川田工業株式会社　橋梁事業部保全技術課
梶原仁

首都高速道路株式会社　保全・交通部鋼構造物疲労対策グループ

書誌事項

タイトル別名

Examination of retrofitting methods for fatigue damages in diaphragm details inside steel pier beam under bridge girder support

説明

Recently, several types of fatigue cracks were found in diaphragm details inside steel pier beam just under bridge girder support details. Most of those fatigue cracks initiate from the diaphragm-beam flange weld, especially at the coped slit for the longitudinal ribs passing through the diaphragm and below the ends of welded cover plates (shoe plates). This study investigates the mechanism of the fatigue cracking through the stress evaluation by loading test with a real size specimen and FEM analyses, and examines several retrofit methods.