BEAM OF REINFORCED CONCRETE STRUCTURE, AND BEAM DESIGN METHOD

• Main Authors: MIZUKOSHI KAZUAKI, YONEZAWA KENJI
• Format: Patent
• Language: English; Japanese
• Published: 22.12.2016
• Subjects: BUILDING; BUILDING MATERIALS; CEILINGS; FIXED CONSTRUCTIONS; FLOORS; GENERAL BUILDING CONSTRUCTIONS; INSULATION OR OTHER PROTECTION OF BUILDINGS; ROOFS; STRUCTURAL ELEMENTS; WALLS, e.g. PARTITIONS

PROBLEM TO BE SOLVED: To ensure that design requirements on bearing force and deformation performance of a structure are met even when an opening is formed at an edge part of a beam of a reinforced concrete structure, without impairing structural performance of the beam, at the same time enabling the opening to be formed closer to a column.SOLUTION: An opening 43 is formed on a beam 4 of a reinforced concrete structure 1, the opening penetrating concrete 41 at an edge part of the beam 4 in a width direction. At least either of a compression member 48 for opening reinforcement above the opening 43 or a compression member 49 for opening reinforcement below the opening 43 is embedded in the concrete 41. The compression members 48, 49 for opening reinforcement are made to extend in an axial direction of the beam 4, and the compression members 48, 49 for opening reinforcement are not anchored to a column 3 connected to the edge part of the beam 4. The opening 43 is positioned closer to an edge 44 by the column of the beam 4, thereby suppressing shear deformation of a portion of the concrete 41 around the opening 43.SELECTED DRAWING: Figure 4 【課題】鉄筋コンクリート構造物において、梁の端部に開口を設けても、梁の構造性能を劣化させることなく、設計上で要求される構造物の耐力および変形性能が得られるようにするとともに、開口を柱際に寄せて配置できるようにする。【解決手段】鉄筋コンクリート構造物１において、梁４の端部のコンクリート４１に幅方向に貫通する開口４３を梁４に設け、開口４３の上側の開口補強圧縮材４８と開口４３の下側の開口補強圧縮材４９のうち少なくとも一方をコンクリート４１に埋設する。開口補強圧縮材４８，４９を梁４の軸方向に延在させ、梁４の端部に接続される柱３に開口補強圧縮材４８，４９を定着しない。開口４３を梁４の柱際４４に寄せて配置して、コンクリート４１のうち開口４３の周囲の部分のせん断変形を抑える。【選択図】図４