SHEAR FAILURE BEHAVIOR ANALYSIS OF RC BEAM WITH UNBONDED REGION AND DECREASED BOND STRENGTH IN STIRRUPS

Sumihiro Sawabe; Naoshi Ueda; Hikaru Nakamura; Minoru Kunieda

doi:10.2208/jsceje.62.444

Abstract

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せん断補強筋の定着不良を生じたせん断破壊するRCはりのせん断耐力の評価法の検討を行い,既往の実験結果および,数値解析を用いてその適用性について検討を行った.その結果,検討した評価法により,斜め引張破壊するはり,せん断圧縮破壊するはりのいずれにおいても,定着不良を生じたせん断補強筋の効果を概ね評価できることが確認された.また数値解析により,定着不良領域や付着強度,供試体寸法を解析パラメータとしてせん断破壊挙動の評価を行った.その結果,せん断補強筋の定着不良の影響は,斜め引張破壊するはりでは,引張側の支点近傍において,せん断圧縮破壊するはりでは,引張側の支点近傍,および圧縮側の載荷点近傍において生じたとき,その影響が構造物全体の挙動に対して支配的であることが確認された.

SHEAR FAILURE BEHAVIOR ANALYSIS OF RC BEAM WITH UNBONDED REGION AND DECREASED BOND STRENGTH IN STIRRUPS

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