TOWER STRUCTURE SUPPORTING STRUCTURE FOR OFFSHORE FLOATING BODY STRUCTURE

To effectively reinforce a tower base unit installed on an offshore floating body structure.SOLUTION: An offshore floating body structure includes: a plurality of frames (horizontal structural members) 32 provided in the horizontal direction for supporting an upper deck 12; a flare tower 22 composed of three pillars 24A to 24C and installed on the upper deck 12; a plurality of connection members hung across the pillars 24A to 24C to integrate the pillars 24A to 24C with each other; and brace members attached to the pillars 24A to 24C respectively in a base unit of the flare tower 22. A top end of the brace member is attached to the height at which the connection members are attached. A bottom end of the brace member is attached to a position at which the horizontal structural member is provided. The inclination angle of the brace members to the upper deck 12 is set within a range of approximately 50 degrees to approximately 70 degrees.SELECTED DRAWING: Figure 4 【課題】洋上浮体構造物に設置されるタワー基部をより効果的に補強する。【解決手段】洋上浮体構造物は、幅方向に設けられ上甲板１２を支持する複数のフレーム（横構造部材）３２と、３本の支柱２４Ａ〜２４Ｃから構成され上甲板１２上に据え付けられるフレアタワー２２と、支柱２４Ａ〜２４Ｃ間に架け渡され支柱２４Ａ〜２４Ｃ同士を一体化する複数の連結部材と、フレアタワー２２の基部において支柱２４Ａ〜２４Ｃの各々に取り付けられるブレース部材とを備える。ブレース部材の上端は、連結部材が取り付けられた高さに取り付けられる。ブレース部材の下端は、横構造部材が設けられた位置に取り付けられる。ブレース部材の上甲板１２に対する傾斜角度は、約５０度〜約７０度の範囲に設定される。【選択図】図４