| 摘要 |
PROBLEM TO BE SOLVED: To provide a composite structural beam capable of reducing a shear reinforcing quantity by eliminating concentrated reinforcing bars arranged near a beginning end of a material end part and increasing a shear strength at the same time, or shortening the material end part to save the weight thereof, and also simplifying a boundary plate, in an embedded type in which a part of a steel frame is embedded in the material end part.SOLUTION: A composite structural beam 1 is formed of a steel-structured central part 11 and a reinforced concrete-structured material end part 12. The composite structural beam comprises: a steel frame 3 a part of which is embedded in the material end part; a boundary plate 4 disposed at a boundary between the central part and the material end part; main reinforcements 5A to 5F arranged in the material end part substantially in parallel with the steel frame and each having a tip 52 fixed to the boundary plate; a plurality of shear reinforcements 6,... arranged at intervals in the axial direction of the steel frame so as to surround the steel frame and the main reinforcements; and concrete 8 filled in the material end part. The steel frame and the boundary plate are not dynamically integrated together. |
