A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
BEAM APERTURE REINFORCING STRUCTURE
To prevent the enlargement of a beam while effectively securing the strength of a beam, and to shorten the fixing length of a horizontal reinforcing bar at a peripheral part of an aperture.SOLUTION: The present invention relates to a beam aperture reinforcing structure 2 for reinforcing a peripheral part 1b of a beam 1 by forming an aperture 1a penetrating in the width direction in the reinforced concrete beam 1 laid along the horizontal direction. The beam aperture reinforcing structure 2 includes a plurality of main reinforcing bars 21 extending in the longitudinal direction of the beam 1; an aperture reinforcing bar 27-30 disposed on both sides in the longitudinal direction of the beam 1 with respect to the aperture 1a; horizontal reinforcing bars 23, 24 extending linearly in the longitudinal direction of the beam 1 and arranged respectively on the upper side and the lower side with respect to an opening 1a; the relationship between the length L of each horizontal reinforcing bar 23, 24, the diameter D of the aperture 1a, the reinforcing bar diameter d of each horizontal reinforcing bar 23, 24, and a predetermined coefficient α is defined on the basis of L=D+2×α×d (Equation 1); where, D is 500 mm to 750 mm, d is equal to or greater than the reinforcing bar diameter of each aperture reinforcing bar 27-30 and less than the reinforcing bar diameter of each main bar 21, and α is 14.4-21.SELECTED DRAWING: Figure 1
【課題】梁の強度を効率的に確保しながら、梁の大型化を防ぎ、開孔周辺部における水平補強筋の定着の長さを短くする。【解決手段】本発明は、水平方向に沿った鉄筋コンクリートの梁１に、その幅方向に貫通する開孔１ａを形成して、梁１の開孔周辺部１ｂを補強する梁開孔補強構造２に関する。かかる梁開孔補強構造２は、梁１の長手方向に延びる複数の主筋２１と、開孔１ａに対して梁１の長手方向の両側にそれぞれ配置される孔際補強筋２７〜３０と、梁１の長手方向に直線状に延び、かつ開孔１ａに対して上側及び下側にそれぞれ配置される水平補強筋２３，２４とを有し、各水平補強筋２３，２４の長さＬと、開孔１ａの直径Ｄと、各水平補強筋２３，２４の鉄筋径ｄと、所定の係数αとの関係が、Ｌ ＝ Ｄ＋２×α×ｄ（式１）に基づいて定義され、Ｄが５００ｍｍ〜７５０ｍｍであり、ｄが各孔際補強筋２７〜３０の鉄筋径以上かつ各主筋２１の鉄筋径以下であり、αが１４．４〜２１である。【選択図】図１
BEAM APERTURE REINFORCING STRUCTURE
To prevent the enlargement of a beam while effectively securing the strength of a beam, and to shorten the fixing length of a horizontal reinforcing bar at a peripheral part of an aperture.SOLUTION: The present invention relates to a beam aperture reinforcing structure 2 for reinforcing a peripheral part 1b of a beam 1 by forming an aperture 1a penetrating in the width direction in the reinforced concrete beam 1 laid along the horizontal direction. The beam aperture reinforcing structure 2 includes a plurality of main reinforcing bars 21 extending in the longitudinal direction of the beam 1; an aperture reinforcing bar 27-30 disposed on both sides in the longitudinal direction of the beam 1 with respect to the aperture 1a; horizontal reinforcing bars 23, 24 extending linearly in the longitudinal direction of the beam 1 and arranged respectively on the upper side and the lower side with respect to an opening 1a; the relationship between the length L of each horizontal reinforcing bar 23, 24, the diameter D of the aperture 1a, the reinforcing bar diameter d of each horizontal reinforcing bar 23, 24, and a predetermined coefficient α is defined on the basis of L=D+2×α×d (Equation 1); where, D is 500 mm to 750 mm, d is equal to or greater than the reinforcing bar diameter of each aperture reinforcing bar 27-30 and less than the reinforcing bar diameter of each main bar 21, and α is 14.4-21.SELECTED DRAWING: Figure 1
【課題】梁の強度を効率的に確保しながら、梁の大型化を防ぎ、開孔周辺部における水平補強筋の定着の長さを短くする。【解決手段】本発明は、水平方向に沿った鉄筋コンクリートの梁１に、その幅方向に貫通する開孔１ａを形成して、梁１の開孔周辺部１ｂを補強する梁開孔補強構造２に関する。かかる梁開孔補強構造２は、梁１の長手方向に延びる複数の主筋２１と、開孔１ａに対して梁１の長手方向の両側にそれぞれ配置される孔際補強筋２７〜３０と、梁１の長手方向に直線状に延び、かつ開孔１ａに対して上側及び下側にそれぞれ配置される水平補強筋２３，２４とを有し、各水平補強筋２３，２４の長さＬと、開孔１ａの直径Ｄと、各水平補強筋２３，２４の鉄筋径ｄと、所定の係数αとの関係が、Ｌ ＝ Ｄ＋２×α×ｄ（式１）に基づいて定義され、Ｄが５００ｍｍ〜７５０ｍｍであり、ｄが各孔際補強筋２７〜３０の鉄筋径以上かつ各主筋２１の鉄筋径以下であり、αが１４．４〜２１である。【選択図】図１
BEAM APERTURE REINFORCING STRUCTURE
梁開孔補強構造
MURAKAMI HIDEO (author) / KIMURA TAKUMI (author) / IGARASHI HARUTO (author) / SHIRATO SHIGERU (author) / OTA SHINJI (author)
2019-05-23
Patent
Electronic Resource
Japanese
IPC:
E04C
STRUCTURAL ELEMENTS
,
Bauelemente
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