単純な押抜き試験に基づく孔あき鋼板ジベルのせん断耐力評価  [in Japanese] EVALUATION OF SHEAR RESISTANCE OF PERFOBOND STRIP BASED ON SIMPLE PUSH-OUT TEST  [in Japanese]

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Abstract

鋼コンクリート複合構造のずれ止めとして用いられる孔あき鋼板ジベルのせん断耐力評価式は種々提案されている.しかし,そのせん断耐力評価式は,押抜き試験中のコンクリートブロックにひび割れが生じる場合も含まれた試験結果に基づいて作成されており,近年施工例が増えている複合ラーメン橋などに用いられる孔あき鋼板ジベルのせん断耐力を必ずしも適切に評価しているとは言えない.そこで本研究では,頭付きスタッドの押抜き標準試験とは異なり,ジベル鋼板をコンクリートブロックで取り囲む単純な押抜き試験体を用いた3シリーズの実験検討を行い,せん断耐力やせん断力-ずれ変位関係を確認した.そしてその結果に基づいて,ジベル孔径,コンクリートの圧縮強度に加えてコンクリートブロックの寸法の影響を考慮したせん断耐力評価式の作成を試みた.

 A perfobond strip is generally used as the shear connector in the various steel-concrete hybrid structures and a few design formulas for evaluating the shear resistance of the perfobond strip are proposed. However, these design formulas are not always applicable to the one employed in the steel-concrete rigid frame bridge, since the formulas are established based on the standard push-out specimen for the stud shear connector in which some cracks may occur in the concrete block of the specimen during the test. In this paper, the shear resistance of the perfobond strip are examined experimentally by employing the simple push-out specimen different from the standard one for the stud shear connector. As a result, the design formula is proposed for evaluating the shear resistance of the perfobond strip taking into account the proportion of the concrete block as well as the perforation size and the concrete compressive strength.

Journal

  • Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE))

    Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE)) 68(2), 495-508, 2012

    Japan Society of Civil Engineers

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