PRESTRESSED CONCRETE FLOOR SLAB BRIDGE OF COMPOSITE STRUCTURE OF STEEL/CONCRETE USING SHAPE STEEL, AND CONSTRUCTION METHOD OF THE PRESTRESSED CONCRETE FLOOR SLAB BRIDGE

摘要

PROBLEM TO BE SOLVED: To provide a prestressed concrete floor slab bridge of composite structure of steel/concrete using shape steel reducing cost and shortening a construction period in view of a possibility of an increase in construction cost because of the need to provide a cross beam to secure an aseismatic structure in an RC structure of placing concrete in the field due to inconvenience of transportation in relation to the weight of a girder in a steel/concrete composite bridge constructed by a so-called WIB (Walztraenger in Beton) method. SOLUTION: Divided T-shape members 23a, 23b of H-shape steel 21 (shown in Figure 4) cut with a web 22 are juxtaposed in inverted T-shape and joined by a diaphragm 26 to manufacture a steel member 2, and concrete 30 is placed to form an SRC block 1 which is manufactured in a factory or the like. The SRC blocks 1 are laid, and a prestressed concrete steel wire is passed through and tensed to introduce prestress. If necessary, a lightweight material 28 is filled in the steel member 2 to reduce the dead load of the SRC block 1. COPYRIGHT: (C)2008,JPO&INPIT