| 摘要 |
PURPOSE: A precast concrete panel with an upper protruding stiffening beam is provided to increase crack resistance by increasing a resultant force with a bridge slab as the bridge slab which is casted and constructed in a field and a composition area increase. CONSTITUTION: A precast concrete panel (100) with an upper protruding stiffening beam comprises a panel body (110), a truss girder (150), a transverse direction reinforcement steel, and a longitudinal direction reinforcement steel. The panel body is formed through concrete casting and includes an upper protruding reinforcement unit (160) and a pair of grooves in the lower surface. The truss girder is applied as a shear connector and comprises a pair of lower roots, an upper root, and a lattice bar. The pair of lower roots is connected to the transverse direction reinforcement steel, and the upper root is placed to form a triangle shape in the top of the lower roots. The lattice bar is extended in a zigzag shape up and down of each hypotenuse part of the triangle shape which is composed of the upper root and the lower roots. The transverse direction reinforcement steel is installed in an orthogonal transverse direction to a longitudinal direction of the truss girder. The longitudinal direction reinforcement steel meets at right angle with the transverse direction reinforcement steel and is installed in the longitudinal direction same as the truss girder. |
