COLUMN MEMBER REINFORCEMENT METHOD USING HIGH PERFORMANCE FIBER-REINFORCED CEMENTITIOUS COMPOSITE AND STRUCTURE BODY

• Main Authors: KUTSUNA ATSUSHI, TANAKA RYOICHI, AMINO TAKAHIKO
• Format: Patent
• Language: English; Japanese
• Published: 27.09.2018
• Subjects: ASSEMBLY OF BRIDGES; BUILDING; BUILDING IMPLEMENTS OR OTHER BUILDING AIDS, OR THEIRUSE; CONSTRUCTION OF BRIDGES; CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES; FIXED CONSTRUCTIONS; FORMS; HANDLING BUILDING MATERIALS ON THE SITE; OR VIADUCTS; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTINGBUILDINGS; SCAFFOLDING; SHUTTERING

PROBLEM TO BE SOLVED: To provide a column member reinforcement method using a high performance fiber-reinforced cementitious composite and a structure body reinforced by the reinforcement method with which damage to a column member superstructure and substructure joint end can be effectively reinforced, while improving the proof stress against bending and axial forces.SOLUTION: A reinforcing steel plate 3 is wound and fixed to an outer peripheral surface of a vertical region including a damaged joint end 2a of a superstructure 7a of a steel pipe pile 2. A shear key 3a is projected onto an outer peripheral surface of the reinforcing steel plate 3. A concrete form 8 is arranged on the outer peripheral side of the vertical region ranging from a position where the shear key 3a is projected to an upper end of the reinforcing steel plate 3. An anchor member 5, which is projected downward from a bottom end of the superstructure 7a, is arranged in a gap g between an inner peripheral surface of the concrete form 8 and the reinforcing steel plate 3. A high performance fiber-reinforced cementitious composite is then placed in the gap g and solidified to form a composite material reinforcement part 4. The reinforcing steel plate 3 and the superstructure 7a are firmly integrated through the composite material reinforcement part 4.SELECTED DRAWING: Figure 1 【課題】柱部材の上部工や下部工との接合端部の損傷を効果的に補強して曲げ耐力や軸力に対する耐力を向上させる複数微細ひび割れ型繊維補強セメント複合材料を用いた柱部材の補強方法およびこの補強方法により補強された構造体を提供する。【解決手段】鋼管杭２の上部工７ａとの損傷した接合端部２ａを含む上下方向領域の外周面に補強鋼板３を巻き立てて固定し、補強鋼板３の外周面にはシアキー３ａを突設して、シアキー３ａが突設された位置から補強鋼板３の上端までの上下方向領域の外周側に型枠８を配置し、上部工７ａの下端部から下方に突出させたアンカー部材５を型枠８の内周面と補強鋼板３とのすき間ｇに配置した状態にして、複数微細ひび割れ型繊維補強セメント複合材料をすき間ｇに打設して固化させることにより、複合材料補強部４を形成し、複合材料補強部４を介して補強鋼板３と上部工７ａとを強固に一体化させる。【選択図】図１