Effect of Shear Connector Provided at Steel-Concrete Interface on Bending Behavior of Concrete-Filled Double Skin Steel Tubular Member

鋼管－コンクリート界面に設けたずれ止めがコンクリート充填二重鋼管部材の曲げ特性に与える影響

For weight reduction of CFT (concrete-filled tube) members, concrete-filled double skin steel tubular members (CFDT) have been developed. To ensure the composite action of CFDT members, shear connectors should be installed at the interface between steel tubes and concrete. In this study, to investigate the effect of shear connector on the bending behavior of CFDT members, four-point bending tests were carried out on CFDT and CFT members with shear connectors. The locations of the shear connectors were different for each specimen. The shear connectors were found to prevent slip between steel tubes and concrete. The maximum load of CFDT members was improved by shear connectors, particularly when placed on the inner surface of the outer steel tube.コンクリート充填二重鋼管（CFDT）部材は，二重に配置された鋼管の間にコンクリートを充填した構造であり，従来のコンクリート充填（CFT）部材よりも軽量となる利点を有する。一方，CFDT部材の内外鋼管と充填コンクリートが一体となって挙動するためには，両鋼管とコンクリートの界面にずれ止めを設置する必要があると考えられる。本研究では，鋼管にずれ止めを設置したCFDTおよびCFT部材の4点曲げ載荷実験を行った。その結果，内鋼管の径が小さいCFDT部材では，ずれ止めを設置した鋼管とコンクリートとのずれが抑制され，ずれ止めの設置によって最大曲げモーメントが向上した。特に，外鋼管にずれ止めを設置した場合には，最大曲げモーメントの向上率が大きかった。一方，内鋼管の径が小さいCFDT部材では，ずれ止めを設置してもずれの抑制効果が小さく，最大曲げモーメントの向上率も小さかった。

• Record URL:
  https://doi.org/10.3151/crt.25.45
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=Effect+of+Shear+Connector+Provided+at+Steel-Concrete+Interface+on+Bending+Behavior+of+Concrete-Filled+Double+Skin+Steel+Tubular+Member&author=M.+Shimizu&author=T.+Ishikawa&author=A.+Hattori&author=H.+Kawano&publication_year=2014
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/13404733
• Authors:
  • Shimizu, Masaru
  • Ishikawa, Toshiyuki
  • Hattori, Atsushi
  • Kawano, Hirotaka
• Publication Date: 2014

Language

• English
• Japanese

Media Info

• Media Type: Digital/other
• Features: Figures; Photos; References; Tables;
• Pagination: pp 45-55
• Serial:
  • Concrete Research and Technology
  • Volume: 25
  • Issue Number: 0
  • 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: Bending; Concrete; Shear strength; Tubing; Weight
• Subject Areas: Construction; Highways; Materials; I32: Concrete; I50: Construction and Supervision of Construction;

Filing Info

• Accession Number: 01541946
• Record Type: Publication
• Source Agency: Japan Science and Technology Agency (JST)
• Files: TRIS, JSTAGE
• Created Date: Oct 29 2014 11:21AM