| 摘要 |
PROBLEM TO BE SOLVED: To provide the solid design of a tower-like truss structure excellent in strength and profitability by preparing a solid truss model, and taking the total stress degree of axial force and bending moment generated in the joining part of main column materials into consideration. SOLUTION: After design specifications are confirmed and mounting columns are determined, a solid truss model is prepared. In a joining part condition, main column materials are used for rigid joining, and the other joining part is used for semi-rigid joining. Bending rigidity in addition to axial and shearing directional rigidity is taken into consideration in the joining part of the main column materials, and a model taking a semi-rigid coefficient into consideration is used for the other joining part. The semi-rigid coefficient (k) is given in the expression 1. The strength of each member constituting a structure is studied in the all members, and the proper member size is selected by the main plane of the structure and the sub-plane of the structure. Then, the strength consideration of the main column materials is performed by the total stress degree of bending moment produced on the axial force and the member end. Thereby the stressed state of the main column material can be accurately found, and the optimum design can be performed on each member.
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