BENDING TEST OF JOINT STRUCTURE OF PRECAST PC SLAB USING PERFOBOND STRIP AND ITS CORRESPONDING ELEMENT TEST

Abstract

 In replacing the slab of the girder bridge, a joint structure with the combination of the perfobond strip and the steel fiber reinforced mortar, have been proposed to connect precast slabs on the site. In previous study, the bending behaviour of this joint structure was confirmed experimentally. In this paper, the bending tests of the joint structure are carried out with two parameters, first is the presence or absence of a chin instead of formwork at the undersurface of the joint structure when placing mortar, and second is the mixture rate of steel fiber in the mortar. The influence of these factors on the bending behaviour of joint structure are considered. In addition, the pull-out tests of the perfobond strip with the steel fiber reinforced mortar are also carried out. The shear resistance of the perfobond strip from the pull-out tests are compared with the estimated value from the bending tests to confirm the corresponding of both tests.