| 摘要 |
PROBLEM TO BE SOLVED: To eliminate bending moment generated due to deflection of a building material such as a beam and a slab so as to reduce a load of a vertical member such as a column material and a wall material supporting the building material. SOLUTION: The building material 1 is formed into a slightly curving shape curving in the opposite direction to the direction of deflection due to its own weight, a carrying load and the like, and inside the building material 1, a tension beam material 2 is arranged along the curving direction so that tension T by prestress is applied to the inside of the building material 1. In formation of the building material 1, tension directional moment caused by its own deflecting deformation and directed to the outside is balanced with compression directional moment caused by the introduced prestress and directed inward so that both of the moment are canceled mutually, and consequently, resultant moment of the building material 1 itself becomes zero approximately maximally. The building material 1 includes a hanging beam structural body, in which a horizontal beam material is hung up by means of a vertical hanging beam material. The tension beam material 2 is used as the horizontal beam material at the same time. The building material 1 is formed of concrete, a steel frame, or wooden structure used for a roof structure, a floor structure a bridge structure, and a dam structure.
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