[2112] Static loading experiment on the brittle behavior of RC member adjacent to CLT wall
Keywords:パンチング耐力、鉄筋コンクリート、木質壁、構造実験、ロッキング挙動
本研究ではCLT壁のロッキング挙動によるパンチング力に対するRC部材の耐力を評価するため，静的載荷実験を行った。実験対象は，CLT壁の内蔵により脆性破壊するよう設計されたRC架構の上下梁であり，CLT壁の有無を変動因子とする2体の80%縮小試験体である。実験の結果，CLT壁の内蔵により初期剛性及び最大耐力が増大し，CLT壁を内蔵した試験体は崩壊機構形成後耐力が低下し，パンチング破壊を実験的に確認した。また，RC梁のパンチング耐力の実験値は，計算値の1.5倍程度であった。
This study conducted static loading tests on an RC member to evaluate their punching shear resistance under forces induced by the rocking behavior of an adjacent CLT wall. The tested specimens were two 80%-scale RC specimens representing the upper and lower beams in an RC frame, designed to exhibit brittle failure due to the punching action by the CLT wall. Two specimens: one with and one without CLT wall, were tester to examine the influence of CLT wall as a variable parameter. The experimental results showed that the CLT wall increased the initial stiffness and maximum load-carrying capacity of the overall specimen. However, punching failure of the RC beam was experimentally observed in the specimen with CLT wall showing rapid deterioration of the load-carrying capacity after the formation of a collapse mechanism. The experimental value of the punching shear resistance of the RC beam was approximately 1.5 times higher than the practical design value.
This study conducted static loading tests on an RC member to evaluate their punching shear resistance under forces induced by the rocking behavior of an adjacent CLT wall. The tested specimens were two 80%-scale RC specimens representing the upper and lower beams in an RC frame, designed to exhibit brittle failure due to the punching action by the CLT wall. Two specimens: one with and one without CLT wall, were tester to examine the influence of CLT wall as a variable parameter. The experimental results showed that the CLT wall increased the initial stiffness and maximum load-carrying capacity of the overall specimen. However, punching failure of the RC beam was experimentally observed in the specimen with CLT wall showing rapid deterioration of the load-carrying capacity after the formation of a collapse mechanism. The experimental value of the punching shear resistance of the RC beam was approximately 1.5 times higher than the practical design value.