| 摘要 |
PURPOSE: A three steps division strain Prestressed concrete girder and an installation method thereof are provided to improve the limit of compression resistance after the placement of a bottom plate and the reduction of prestress efficiency due to tension. CONSTITUTION: A three steps division strain Prestressed concrete girder comprises a lower flange(10), a web(50), a plurality of ducts, an upper right and left mounting units(51,53), a lower right and left mounting unit, and a steel wire. The web includes a width which is narrower than the lower flange and is extended from the upper part of the lower flange by using high strength concrete. When whole height of the web is 'H', and the upper right and left mounting units and the lower right and left mounting units are separated in a horizontal direction in a position over H/2 from the lower flange so that the mounting units are formed as a shape protruding from the web. The duct penetrating the right and left mounting units is installed in the web. |
