論文・報告
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柱と梁のいずれもアンボンドPC部材とした柱梁接合部の実験を実施した。柱梁接合部に鉛直方向と水平方向の貫通孔を設けて、体積空隙率を実験変数とした。アンボンドPCaPC柱梁接合部のせん断終局耐力は、体積空隙率が約10%の場合にはボンドPCのせん断終局耐力式による計算値と同等となり、体積空隙率が約15%の場合にはその計算値を9%下回った。柱梁強度比が1程度の試験体であったが、破壊形式は接合部降伏破壊ではなくコンクリート圧壊型の釣合破壊であった。 キーワード: アンボンドPC、柱梁接合部、せん断終局耐力、体積空隙率、釣合破壊 |
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Loading tests were conducted on precast prestressed beam-column joints in which both columns and beams were post-tensioned by unbonded tendons. Vertical and horizontal through-holes were provided at beam-column joints, and the volume void ratio was used as an experimental variable. The ultimate shear strength of unbonded PCaPC beam-column joints was equivalent to the calculated value by bonded PC formula when the volume void ratio was about 10%, and it was 9% lower than the calculated value when it was about 15%. Although the column-to-beam strength ratio of the test specimen was about 1, the beam-column joint yielding had not occurred. Key Words: Unbonded Prestressed Concrete, Beam-column Joint, Ultimate Shear Capacity, Volume Void Ratio, Balanced Failure |
論文