Junction structure null of half precast concrete beam and cast-in-place concrete large

摘要

PURPOSE:To facilitate construction execution and secure the joint strength by assembling the header of a half PC small beam which has a tapered surface spreading upwardly onto the side surface of a site laying concrete large beam without allowing an anchorage stem to project onto a header surface. CONSTITUTION:Upper part vertical surfaces 5a and 5b and tapered surfaces 5a and 5a spreading under the upper part vertical surfaces 5a and 5b without projecting an anchorage stem onto the header surfaces of the half precasted concrete small beams 5 and 5. Then, the small beams 5 and 5 are assembled into the side surface joint part of a site laying concrete large beam 1. After concrete laying for the large beam 1, the component force of the vertical load applied on the small beams 5 and 5 exerts a wedge action onto the joint surface of the large beam 1 through the tapered surfaces 5a and 5a, and the small beams 5 and 5 are attached onto the large beam 1 with a sufficient joint strength. Therefore, the obstruction for construction execution by the anchorage stem projecting from the headers of the small beams 5 and 5 is prevented.