| 摘要 |
A unit prestressed composite girder and a construction method for a continuous girder using the unit prestressed composite girder are provided to simplify a continuation structure and to perform construction work easily, effectively and economically by continuing unit prestressed composite girders using an upper tensile force restraining structure and resisting a negative moment simply. A unit prestressed composite girder is manufactured in the type of a simple beam by connecting two H-beams in a row using a connecting plate(13), and continued by connecting with another prestressed composite girder using a fastening plate(40) and installing an upper tensile force restraining structure. The construction method for a continuous girder using the unit prestressed composite girder comprises the steps of: putting a primary unit composite girder and a secondary unit composite girder to face each other at an inner support; unifying negative moment sections of upper and lower flanges with fastening plates; installing an induction type saddle(34) between a fastening hole(42) and a fastening hole of the upper fastening plate; installing strands continuously through upper tensile force restraining strand sheathe pipes of the primary unit composite girder and the secondary unit composite girder to make one end of the strand anchored to an anchor hole of the lower flange of the primary unit composite girder and the other end inserted to the anchor hole of the lower flange via a through hole(16) of the upper flange, the fastening hole of the fastening plate; applying tensile force to the strand inserted to the anchor hole of the lower flange of the secondary unit composite girder; and anchoring the strand on the anchor hole of the lower flange of the secondary unit composite girder. |
