THE SITE BUILT-UP HYBRID GIRDER WHICH IS PRESTRESSED BY GAP DIFFERENCE OF CONNECTION FACE OF BLOCKS AND PRESTRESSING METHODS FOR THE HYBRID GIRDER, CONNECTING METHODS OF THE HYBRID GIRDERS TO MAKE CONTINUOUS GIRDER

摘要

The present invention relates to a prefabricated hybrid girder which is often used for an upper structure of a bridge and comprises a precast concrete block and a steel block. Two precast concrete blocks are arranged on both outer sides, and a center block connecting the two precast concrete blocks is formed of the steel block. A connection surface of a connection unit which is between the blocks has a gap so that prestress can be automatically applied to a girder due to the gap when the blocks are assembled.