EVALUATION OF FATIGUE RESISTANCE IN RUNNING WHEEL LOAD TESTS OF RC SLABS REINFORCED WITH UFC PANEL TOP SURFACE BONDED

UFCパネル上面接着補強したRC床版の輪荷重走行疲労実験における耐疲労性の評価

In this study strengthening the UFC (ultra high-strength fiber reinforced concrete) panel top surface by bonding method is proposed as a method for repair and reinforcement of RC (reinforced concrete) slabs of road bridges. Running wheel load tests were carried out to evaluate its practicality. Comparative tests were carried out using RC slab test specimens, SFRC (steel fiber reinforced concrete) top surface thickened reinforced RC slab test specimens, and UFC panel top surface bonded reinforced RC slab test specimens. The fatigue resistance was evaluated from the results, and it was found that the strengthening effect of UFC panel top surface bonded reinforced RC slabs was 47.1 times that of RC slab test specimens, and 2.2 times in the case of SFRC top surface thickened reinforced RC slabs. No sudden increase was seen in the relationship between deflection/strain and the equivalent number of running loads up to failure. The failure mode for all test specimens was punching shear failure. Therefore the fatigue resistance is evaluated highly for the UFC panel top surface bonded strengthening method, which is considered to be a practical reinforcing method for RC slabs of road bridges.本研究は、道路橋RC床版の補修・補強法としてUFCパネル上面接着補強法を提案し、実用性を評価するために輪荷重走行疲労実験を行った。実験には、RC床版供試体、SFRC上面増厚補強したRC床版供試体、UFCパネル上面接着補強したRC床版供試体を用いて比較検討した。その結果、UFCパネル上面接着補強床版はRC床版供試体の47.1倍、またSFRC上面増厚補強の2.2倍の補強効果が得られ、耐疲労性が評価された。たわみ・ひずみと等価走行回数の関係においても破壊時まで急激な増加は見られない。破壊状況は全ての供試体が押抜きせん断破壊となった。よって、UFCパネル上面接着補強法においては耐疲労性が評価され、道路橋RC床版の補強法として実用的であると考えられる。

• Record URL:
  • https://doi.org/10.14250/cement.66.568
• Summary URL:
  • http://scholar.google.com/scholar_lookup?title=EVALUATION+OF+FATIGUE+RESISTANCE+IN+RUNNING+WHEEL+LOAD+TESTS+OF+RC+SLABS+REINFORCED+WITH+UFC+PANEL+TOP+SURFACE+BONDED&author=T.+ABE&author=S.+TANAKA&publication_year=2012
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09163182
• Authors:
  • ABE, Tadashi
  • TANAKA, Satoshi
• Publication Date: 2012

Language

• English
• Japanese

Media Info

• Media Type: Digital/other
• Features: Figures; Photos; Tables;
• Pagination: pp 568-575
• Serial:
  • Cement Science and Concrete Technology
  • Volume: 66
  • Issue Number: 1
  • Publisher: Japan Cement Association
  • ISSN: 0916-3182
  • EISSN: 2187-3313
  • Serial URL: https://www.jstage.jst.go.jp/browse/cement/-char/en
• Publication flags:

  Open Access (libre)

Subject/Index Terms

• TRT Terms: Deflection; Fatigue (Mechanics); Fiber reinforced concrete; Highway bridges; Reinforced concrete; Slabs; Steel fibers; Strain (Mechanics); Wheel loads
• Subject Areas: Bridges and other structures; Construction; Highways; Materials; I32: Concrete; I53: Construction of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01522940
• Record Type: Publication
• Source Agency: Japan Science and Technology Agency (JST)
• Files: TRIS, JSTAGE
• Created Date: Apr 24 2014 11:45AM