外部PC鋼棒により横補強されたRC柱における異形主筋の付着割裂強度

概要

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In order to investigate splitting bond strength of the deformed longitudinal reinforcing bars in the R/C columns strengthened laterally with the external PC rods, a total of 52 sets of test re-bars with and without active confining force given by the external PC rods are pulled monotonically until failure. Test results indicate that the bond strength becomes higher with the increase in number of PC rod sets and their initial stress magnitude. This is due to the active confining force given by the PC rods, and passive confining forces given by the PC rods and transverse reinforcements, in which the passive confinement effect varies depending on the magnitude of active confining force. An equation to estimate the splitting bond strengths for the R/C columns strengthened laterally with the external PC rods is developed based on the test results of the present study.
2006-05-30