ALLOWABLE SHEAR STRENGTH CONTROLLED BY RESIDUAL SHEAR CRACK WIDTH OF R/C BEAMS USING SD295 TO 785 N/mm2 TRANSVERSE REINFORCEMENT

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  • ICHIOKA Yukako
    Structural Eng. Dept., General Building Research Corporation, Ph. D.
  • TAGAWA Hiroyuki
    Structural Eng. Dept., General Building Research Corporation, Ph. D.
  • ADACHI Masato
    Structural Eng. Dept., General Building Research Corporation, Ph. D.
  • MASUO Kiyoshi
    Structural Eng. Dept., General Building Research Corporation, Dr. Eng.

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  • SD295～785N/mm2級横補強筋を用いたRC梁の残留せん断ひび割れ幅制限値に基づく短期許容せん断力
  • SD295 785N mm 2 キュウ オウ ホキョウキン オ モチイタ RCリョウ ノ ザンリュウ センダン ヒビワレ ハバ セイゲンチ ニ モトズク タンキ キョヨウ センダンリョク

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Abstract

Allowable shear strength for repair-control was specified in AIJ Standard for Structural Calculation of Reinforced Concrete Structures revised in 2010. However, this allowable strength was defined by limited data and past research indicated that in some specimens no shear crack was initiated at allowable strength.<br> The authors conduct anti-symmetric bending tests of R/C beams using SD295 to 785 N/mm2 transverse reinforcement. It is confirmed that specimens with small transverse reinforcement ratio have frequently no shear crack at allowable strength. Finally, modified allowable shear strength accounting for transverse reinforcement ratio is proposed and verified to satisfy residual shear crack width limitation.

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