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Abstract ▼ AI-Helper

This paper deals with the static shear strength and residual strength after cyclic loading of perfobond rib shear connectors. A total of eighteen push-out specimens with perfobond rib shear connectors were fabricated and a series of static and residual push-out tests were conducted. Then, the influe...

This paper deals with the static shear strength and residual strength after cyclic loading of perfobond rib shear connectors. A total of eighteen push-out specimens with perfobond rib shear connectors were fabricated and a series of static and residual push-out tests were conducted. Then, the influences of hole crossing bars, concrete dowel, and cyclic loading on the shear strength were evaluated experimentally. As a results of this study, it is proved that the concrete dowel action is charge of 65% in ultimate shear strength of perfobond shear connectors, and the hole crossing bars increase the shear strength of that in two times. Especially, at the time of failure of shear connectors, the hole crossing bars significantly increase ductility of load-slip behavior. According to the residual push-out tests applying two types of cyclic loadings, design load and 50% of design load specified in Korean Highway Bridge Design Code, the residual strength, which was drawn by static push-out test after cyclic loadings, of the specimens without hole crossing bars were reduced to 65% of ultimate strength. However, the residual strength of the hole crossing bars were not reduced significantly. Therefore, as the perfobond shear connectors are applied to the Bridges which are frequently subjected to the fatigue loadings, it is designable to install hole crossing bar in order to prevent reducing of shear strength by fatigue loadings.

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