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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
FATIGUE CRACK PREVENTION STRUCTURE FOR STEEL BRIDGE WITH VERTICAL STIFFENER
To provide a fatigue crack prevention structure for steel bridge with vertical stiffener for relaxing stress concentration in the vicinity of a joint between an upper flange of a main girder supporting a deck plate of a steel plate floor or a concrete floor slab and the upper end of a vertical stiffener without reducing the rigidity of the vertical stiffener.SOLUTION: An upper end 41 of a vertical stiffener 24 that stiffens a main girder web 23 is welded to the lower surface of a deck plate 12 at a joint 42. The vertical stiffener has a rectangular flat plate 46 and a protruding part 47. At the joint, complete penetration welding is performed at a length L47 of the protruding part and a length L63 of a welding region 63 of the rectangular flat plate. Fillet welding is performed at a residual region 67 via a transition region 66. As with the top being a concrete floor slab, and not just the deck plate side, it is possible to prevent the occurrence of fatigue cracks from a weld toe part on the vertical stiffener side and a weld root part.SELECTED DRAWING: Figure 8
【課題】垂直補剛材の剛性を低下させることなく、鋼床版のデッキプレートまたはコンクリート床版などを支持する主桁の上フランジと垂直補剛材の上端部との接合部付近における応力集中を緩和させるようにした垂直補剛材を備える鋼橋の疲労き裂防止構造を提供する。【解決手段】デッキプレート１２の下面に、主桁ウエブ２３を補剛する垂直補剛材２４の上端部４１が、接合部４２で溶接される。垂直補剛材は、矩形平板部４６と突出部４７とを有する。接合部において、突出部の長さＬ４７と、矩形平板部の溶接領域６３の長さＬ６３とにおいて完全溶込み溶接され、遷移領域６６を経て残余の領域６７では隅肉溶接される。デッキプレート側だけではなく、上部がコンクリート床版の場合と同様に、垂直補剛材側の溶接止端部や、溶接ルート部からの疲労き裂の発生も防止できる。【選択図】図８
FATIGUE CRACK PREVENTION STRUCTURE FOR STEEL BRIDGE WITH VERTICAL STIFFENER
To provide a fatigue crack prevention structure for steel bridge with vertical stiffener for relaxing stress concentration in the vicinity of a joint between an upper flange of a main girder supporting a deck plate of a steel plate floor or a concrete floor slab and the upper end of a vertical stiffener without reducing the rigidity of the vertical stiffener.SOLUTION: An upper end 41 of a vertical stiffener 24 that stiffens a main girder web 23 is welded to the lower surface of a deck plate 12 at a joint 42. The vertical stiffener has a rectangular flat plate 46 and a protruding part 47. At the joint, complete penetration welding is performed at a length L47 of the protruding part and a length L63 of a welding region 63 of the rectangular flat plate. Fillet welding is performed at a residual region 67 via a transition region 66. As with the top being a concrete floor slab, and not just the deck plate side, it is possible to prevent the occurrence of fatigue cracks from a weld toe part on the vertical stiffener side and a weld root part.SELECTED DRAWING: Figure 8
【課題】垂直補剛材の剛性を低下させることなく、鋼床版のデッキプレートまたはコンクリート床版などを支持する主桁の上フランジと垂直補剛材の上端部との接合部付近における応力集中を緩和させるようにした垂直補剛材を備える鋼橋の疲労き裂防止構造を提供する。【解決手段】デッキプレート１２の下面に、主桁ウエブ２３を補剛する垂直補剛材２４の上端部４１が、接合部４２で溶接される。垂直補剛材は、矩形平板部４６と突出部４７とを有する。接合部において、突出部の長さＬ４７と、矩形平板部の溶接領域６３の長さＬ６３とにおいて完全溶込み溶接され、遷移領域６６を経て残余の領域６７では隅肉溶接される。デッキプレート側だけではなく、上部がコンクリート床版の場合と同様に、垂直補剛材側の溶接止端部や、溶接ルート部からの疲労き裂の発生も防止できる。【選択図】図８
FATIGUE CRACK PREVENTION STRUCTURE FOR STEEL BRIDGE WITH VERTICAL STIFFENER
垂直補剛材を備える鋼橋の疲労き裂防止構造
SAKANO MASAHIRO (Autor:in) / TANABE ATSUSHI (Autor:in)
17.06.2021
Patent
Elektronische Ressource
Japanisch
IPC:
E01D
BRIDGES
,
Brücken
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