STRUCTURE FOR RIGIDLY JOINING PIER AND CONCRETE BEAM TOGETHER

摘要

A structure for rigidly joining a pier and a concrete beam together can form a bridge which is significantly lower in cost than a rigid-frame bridge using steel beams, uses a reduced total amount of steel materials, and allows the concrete beam to be formed in a shape according to a bridge building site without a limitation on the shape, which limitation is found in the steel beam. A joint-equipped precast concrete beam (1) is formed by embedding the rear halves of shaped steel joints (3), which are constructed from short shaped steel, in opposite ends of a concrete beam (2) and causing the front halves of the joints (3) to project from the surfaces of the ends of the concrete beam (2).  Those portions (3b) of the joints (3) which project from the end surfaces of the concrete beam (2) are made to be supported on bridge seat surfaces (12) of piers (4) and are connected to connecting bars (13) raised from the bridge seat surfaces (12).  The portions (3b) of the joints (3) and the connecting bars (13) are embedded in connecting concrete (14) additionally placed on the bridge seat surfaces (12).  Thus, a structure for rigidly joining the pier (4) and the concrete beam (2) together is formed.