CONSIDERATION OF SHEAR RESISTING MECHANISM IN PERFOBOND STRIP WITHOUT PENETRATING REINFORCING BAR

Abstract

 The perfobond strip is intended to integrate composite structural members by filling the hole put in the rib steel plate with concrete. In this study, an experimental study was conducted to understand the shear resistance mechanism of the perfobond strip without the penetrating rebar. In particular, the influence of the confining force acting the hole part on the shear strength was focused.

 In the experiment, the element test specimen that can subject the confining force only to the hole and eliminate the friction force between the steel plate and concrete around was used. From the experimental results, it was clarified that shear strength increases as the confining force increases but has a certain upper limit. Based on this result, the shear strength formula of perfobond strip without the penetrating rebar, which eliminates the effects of friction, was derived. In addition, regarding the slip displacement in the shear direction, the influence of the confining force was incorporated into the coefficient of the model formula in the Standard Specification for Hybrid Structures.