Effects of Crack-Prevention Slits in Concrete Guard Walls on Stress in Steel Girders

鉄筋コンクリート壁式防護柵のスリットが鋼桁に生じる応力に与える影響

Recently, to minimize thermal cracks that occur due to excessive temperature differences, several slits have been provided as a crack-prevention measure in the concrete guard walls of bridges. However, this practice may affect the amount of stress in steel girders due to insufficient stiffness of these bridges. This paper presents an investigation of the effect of crack-prevention slits on steel girders through the use of FEM (finite element method) analysis. A RC (reinforced concrete) deck bridge with 4 steel plate girders was used as the model bridge. The authors' analysis revealed that the stress in the lower flange of exterior girders exceeds that of bridges that have no concrete guard wall when the slits are provided at a long distance from each other.本研究では，鉄筋コンクリート床版を有する鋼鈑桁橋を対象に，鉄筋コンクリート壁式防護柵（壁高欄）のひび割れ対策として設けられる伸縮目地（スリット）の数や間隔が主桁の応力に与える影響を明らかにするために，壁高欄にスリットを設けたRC床版鋼合成桁橋のFEM解析を行った。その結果，スリットの間隔が短い場合，スリット位置の外桁下フランジ下面に生じる応力は，壁高欄が設けられていない場合の外桁下フランジの応力とほぼ一致するが，スリットの間隔が長い場合，スリット位置の外桁下フランジの応力は，壁高欄が設けられていない場合よりも大きくなることが示された。

• Record URL:
  https://doi.org/10.3151/crt.24.113
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=Effects+of+Crack-Prevention+Slits+in+Concrete+Guard+Walls+on+Stress+in+Steel+Girders&author=S.+HENG&author=T.+Ishikawa&author=H.+Kawano&author=A.+Hattori&publication_year=2013
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/13404733
• Authors:
  • HENG, Salpisoth
  • Ishikawa, Toshiyuki
  • Kawano, Hirotaka
  • Hattori, Atsushi
• Publication Date: 2013

Language

• English
• Japanese

Media Info

• Media Type: Digital/other
• Features: Figures; Photos; References; Tables;
• Pagination: pp 113-121
• Serial:
  • Concrete Research and Technology
  • Volume: 24
  • Issue Number: 3
  • Publisher: Japan Concrete Institute
  • ISSN: 1340-4733
  • EISSN: 2186-2745
  • Serial URL: https://www.jstage.jst.go.jp/browse/crt/-char/en
• Publication flags:

  Open Access (libre)

Subject/Index Terms

• TRT Terms: Bridge decks; Cracking; Finite element method; Flanges; Girders; Reinforced concrete bridges; Stresses; Temperature; Walls
• Subject Areas: Bridges and other structures; Highways; Materials; I24: Design of Bridges and Retaining Walls; I32: Concrete;

Filing Info

• Accession Number: 01515480
• Record Type: Publication
• Source Agency: Japan Science and Technology Agency (JST)
• Files: TRIS, JSTAGE
• Created Date: Feb 24 2014 8:42AM