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JP2014190040A - Hybrid structure and the construction method therefor - Google Patents

Hybrid structure and the construction method therefor Download PDF

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Publication number
JP2014190040A
JP2014190040A JP2013066438A JP2013066438A JP2014190040A JP 2014190040 A JP2014190040 A JP 2014190040A JP 2013066438 A JP2013066438 A JP 2013066438A JP 2013066438 A JP2013066438 A JP 2013066438A JP 2014190040 A JP2014190040 A JP 2014190040A
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Prior art keywords
column
steel
concrete
joint
concrete column
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JP2013066438A
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JP6215552B2 (en
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Singh Ravi
ラヴィ シング
Masashi Matsudo
正士 松戸
Hitoshi Sasaki
仁 佐々木
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Fujita Corp
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Fujita Corp
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Priority to JP2013066438A priority Critical patent/JP6215552B2/en
Priority to PCT/JP2014/001578 priority patent/WO2014156072A1/en
Priority to CN201480013043.1A priority patent/CN105102734B/en
Publication of JP2014190040A publication Critical patent/JP2014190040A/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
    • E04B1/22—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material with parts being prestressed
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/30—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts being composed of two or more materials; Composite steel and concrete constructions
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
    • E04H9/024—Structures with steel columns and beams
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
    • E04H9/025—Structures with concrete columns
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
    • E04B1/2403—Connection details of the elongated load-supporting parts
    • E04B2001/2448—Connections between open section profiles

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Rod-Shaped Construction Members (AREA)

Abstract

PROBLEM TO BE SOLVED: To reduce a cross section of a column, and to enhance the aseismic performance of a building.SOLUTION: PC steel wires 22 are upwardly protruded from four corners of an upper end 10A of a concrete column 10. A beam-column joining pat 14 has a steel frame beam portion 12A, upper and lower band plates 30 attached to an upper part and a lower part of the steel frame beam portion 12A, a surrounding plate 32 attached between peripheries of the upper and lower band plates 30 and partitioning an inside space, concrete 34 placed in the inside space, and a plurality of penetration holes 36A, 36B. In the column-beam joining part 14, the lower band plate 30 is placed at the upper end 10A of the concrete column 10, and the PC steel wires 22 pass through the penetration holes 36A, 36B and are upwardly protruded from the upper band plate 30. Tensile strength is applied to the PC steel wires 22 on the upper band plate 30, and prestress is applied to the concrete column 10 and the column-beam joining part 14.

Description

本発明は、プレストレスコンクリート柱と鉄骨梁とが結合されたハイブリット構造と、その構築方法に関する。   The present invention relates to a hybrid structure in which a prestressed concrete column and a steel beam are combined, and a construction method thereof.

従来、ハイブリット構造の建物では、柱をコンクリート造、梁を鉄骨造としている（特許文献１）。   Conventionally, in a building having a hybrid structure, a pillar is made of concrete and a beam is made of steel (Patent Document 1).

特開平５−３３１９１２JP 5-331912

そのため、柱を鉄筋コンクリート造とした従来のハイブリット構造では、建物の重量および地震時の荷重を負担するため、柱の断面積を大きくせざるを得ない。
その結果、建物の重量が増加し、建物の耐震性能を高める上で不利があった。
本発明は前記事情に鑑み案出されたものであって、本発明の目的は、プレストレスコンクリート柱と鉄骨梁とが結合されたハイブリット構造の建物において、柱の断面を小さくでき、建物の耐震性能を高める上で有利なハイブリット構造とその構築方法を提供することにある。 Therefore, in the conventional hybrid structure in which the columns are reinforced concrete, the weight of the building and the load at the time of an earthquake are borne, so the cross-sectional area of the columns must be increased.
As a result, the weight of the building is increased, which is disadvantageous in improving the earthquake resistance performance of the building.
The present invention has been devised in view of the above circumstances, and an object of the present invention is to reduce the cross section of a pillar in a hybrid structure building in which a prestressed concrete column and a steel beam are combined, and An object of the present invention is to provide a hybrid structure and its construction method that are advantageous in enhancing performance.

前記目的を達成するため本発明は、コンクリート柱と複数の鉄骨梁とが結合されたハイブリット構造であって、前記コンクリート柱の上端部の外周部の周方向に間隔をおいた複数箇所において前記コンクリート柱の下部から上方に延在する複数のＰＣ鋼材がそれぞれ上方に突出しており、前記複数の鉄骨梁が前記コンクリート柱の上端部に結合される箇所は柱梁接合部とされ、前記柱梁接合部は、複数の前記鉄骨梁が結合された鉄骨梁部分と、前記鉄骨梁部分の上下に取着された上下のバンドプレートと、前記上下のバンドプレートの周囲間に取着され前記複数の鉄骨梁を貫通させ前記上下のバンドプレートの間に内側空間を仕切る囲み板と、前記内側空間に打設されるコンクリートと、前記複数のＰＣ鋼材を下側の前記バンドプレートから前記コンクリート、上側の前記バンドプレートに挿通させる複数の挿通孔とを有し、前記柱梁接合部は、下側の前記バンドプレートが前記コンクリート柱の上端部に載置されており、前記コンクリート柱の上端部から突出する前記複数のＰＣ鋼材が前記挿通孔に挿通されて上側の前記バンドプレートから上方に突出しており、前記複数のＰＣ鋼材に引っ張り力を掛けることで前記コンクリート柱と前記柱梁接合部にプレストレスが掛けられていることを特徴とする。
また、本発明は、コンクリート柱と複数の鉄骨梁とが結合されたハイブリット構造の構築方法であって、前記コンクリート柱の上端部の外周部の周方向に間隔をおいた複数箇所から前記コンクリート柱の下部から上方に延在する複数のＰＣ鋼材をそれぞれ上方に突出させ、前記複数の鉄骨梁が前記コンクリート柱の上端部に結合される柱梁接合部を、前記複数の鉄骨梁が結合された鉄骨梁部分と、前記鉄骨梁部分の上下に取着された上下のバンドプレートと、前記上下のバンドプレートの周囲間に取着され前記複数の鉄骨梁を貫通させて前記上下のバンドプレートの間に内側空間を仕切る囲み板と、前記内側空間に打設されるコンクリートと、前記複数のＰＣ鋼材を下側の前記バンドプレートから前記コンクリート、上側の前記バンドプレートに挿通させる複数の挿通孔とで構成し、前記柱梁接合部の前記下側のバンドプレートを前記コンクリート柱の上端部に載置し、前記コンクリート柱の上端部から突出する前記複数のＰＣ鋼材を前記挿通孔に挿通して上側の前記バンドプレートから上方に突出させ、前記上側のバンドプレート上において前記複数のＰＣ鋼材に引っ張り力を掛けることで前記コンクリート柱と前記柱梁接合部にプレストレスを掛けるようにしたことを特徴とする。 In order to achieve the above object, the present invention provides a hybrid structure in which a concrete column and a plurality of steel beams are combined, and the concrete column is provided at a plurality of locations spaced in the circumferential direction of the outer peripheral portion of the upper end portion of the concrete column. A plurality of PC steel members extending upward from the lower part of the column protrude upward, and a portion where the plurality of steel beams are coupled to an upper end portion of the concrete column is a column beam joint, and the column beam joint The portion includes a steel beam portion to which a plurality of the steel beam beams are coupled, upper and lower band plates attached to the upper and lower sides of the steel beam portion, and a plurality of the steel frames attached between the upper and lower band plates. A surrounding plate that penetrates a beam and partitions an inner space between the upper and lower band plates, concrete that is placed in the inner space, and the plurality of PC steel materials from the lower band plate The concrete column has a plurality of insertion holes through which the upper band plate is inserted, and the column beam joint has the lower band plate placed on the upper end of the concrete column. The plurality of PC steel members protruding from the upper end of the steel plate are inserted through the insertion holes and protrude upward from the upper band plate, and the concrete columns and the column beams are applied by applying a tensile force to the plurality of PC steel materials. A prestress is applied to the joint.
The present invention is also a method for constructing a hybrid structure in which a concrete column and a plurality of steel beams are combined, and the concrete column is formed from a plurality of locations spaced in the circumferential direction of the outer peripheral portion of the upper end portion of the concrete column. A plurality of PC steel members extending upward from the lower part of each of the steel beams are protruded upward, and the plurality of steel beams are coupled to a column beam joint where the plurality of steel beams are coupled to an upper end portion of the concrete column. A steel beam part, upper and lower band plates attached to the upper and lower parts of the steel beam part, and a space between the upper and lower band plates attached between the upper and lower band plates and passing through the plurality of steel beam A partition plate for partitioning the inner space, concrete cast in the inner space, the plurality of PC steel materials from the lower band plate to the concrete, and the upper band plate And a plurality of insertion holes that are inserted into the plurality of PC steel members. The plurality of PC steel members projecting from the upper end portion of the concrete column, wherein the lower band plate of the column beam joint is placed on the upper end portion of the concrete column. Is inserted into the insertion hole and protrudes upward from the upper band plate, and a tensile stress is applied to the plurality of PC steel materials on the upper band plate to prestress the concrete column and the beam-column joint. It is characterized by being multiplied.

本発明によれば、各柱梁接合部からその直下のコンクリート柱にプレストレスを簡単に確実に導入できるので、プレストレスコンクリート柱の軸耐力および曲げ耐力を簡単に確実に向上できる。
したがって、柱の断面積を小さくでき、建物の重量を低減し、建物のコストダウンを図る上で有利となる。
また、ＰＣ鋼材を柱梁接合部に挿通させ、柱―柱梁接合部一体型建込みとするので、コンクリート型枠などの量が減って躯体工事の簡略化が図れ、躯体工事の工期の短縮化、コストダウンを図る上で有利となる。
また、柱梁接合部はその外面に、上下のバンドプレートおよび囲み板を備えるので、柱梁接合部のせん断力が向上し、柱梁接合部に高い耐震性能を発揮させる上で有利となる。 According to the present invention, since prestress can be easily and reliably introduced from each column-beam joint to the concrete column directly therebelow, it is possible to easily and reliably improve the axial strength and bending strength of the prestressed concrete column.
Therefore, the cross-sectional area of the column can be reduced, which is advantageous in reducing the weight of the building and reducing the cost of the building.
In addition, because the PC steel material is inserted into the beam-column joint and built into the column-column-beam joint, the amount of concrete formwork is reduced, simplifying the frame work and shortening the work period of the frame work. This is advantageous in reducing cost and cost.
In addition, since the column beam joint is provided with upper and lower band plates and a surrounding plate on its outer surface, the shear force of the column beam joint is improved, which is advantageous for exhibiting high earthquake resistance performance in the column beam joint.

ハイブリット構造の正面図である。It is a front view of a hybrid structure. （Ａ）は柱梁接合部の平面図、（Ｂ）は上側のバンドプレートを取り除いた柱梁接合部の平面図、（Ｃ）は（Ａ）のＣＣ断面図である。(A) is a plan view of the beam-column joint, (B) is a plan view of the beam-column joint with the upper band plate removed, and (C) is a CC cross-sectional view of (A). コンクリート柱の上端部に柱梁接合部を載置する説明図である。It is explanatory drawing which mounts a column beam junction part in the upper end part of a concrete pillar. （Ａ）、（Ｂ）はそれぞれ柱梁接合部の変形例の斜視図である。(A), (B) is a perspective view of the modification of a column beam junction part, respectively. （Ａ）、（Ｂ）は柱梁接合部の変形例の説明図、（Ｃ）はコンクリート柱および柱梁接合部の変形例の説明図である。(A), (B) is explanatory drawing of the modification of a column beam junction part, (C) is explanatory drawing of the modification of a concrete column and a column beam junction part.

以下、本発明のハイブリット構造をその構築方法と共に添付図面に従って説明する。
図１〜図３に示すように、コンクリート柱１０と、鉄骨梁１２の柱梁接合部１４とが結合されてハイブリット構造１６が構成されている。 Hereinafter, the hybrid structure of the present invention will be described together with its construction method with reference to the accompanying drawings.
As shown in FIGS. 1 to 3, the concrete column 10 and the column beam joint 14 of the steel beam 12 are combined to form a hybrid structure 16.

コンクリート柱１０は、例えば、フロア１８上に立設されている。
コンクリート柱１０の上端部１０Ａの外周部の周方向に間隔をおいた複数箇所から、コンクリート柱１０の下部から上方に延在するＰＣ鋼材であるＰＣ鋼線２２の複数本がそれぞれ上方に突出している。
本実施の形態では、コンクリート柱１０の断面は矩形状を呈しており、ＰＣ鋼線２２が３本ずつコンクリート柱１０の上端部１０Ａの４隅からそれぞれ上方に突出している。なお、このＰＣ鋼線２２の本数は建物に合わせ適宜決定される。
各ＰＣ鋼線２２の下端は、例えば、機械式継手２４を介して基礎に連結され、あるいは、下層階のコンクリート柱１０のＰＣ鋼線２２に連結されている。
なお、ＰＣ鋼線２２の下端を除いた箇所は、後述するように後でコンクリート柱１０と柱梁接合部１４とにプレストレスとを掛けられるように、スリーブ内に通すなどしてコンクリート柱１０のコンクリートに完全に密着させないように図られている。 The concrete pillar 10 is erected on the floor 18, for example.
A plurality of PC steel wires 22, which are PC steel materials extending upward from the lower part of the concrete column 10, protrude upward from a plurality of locations spaced in the circumferential direction of the outer peripheral portion of the upper end portion 10 </ b> A of the concrete column 10. Yes.
In the present embodiment, the concrete pillar 10 has a rectangular cross section, and three PC steel wires 22 protrude upward from the four corners of the upper end portion 10A of the concrete pillar 10, respectively. The number of PC steel wires 22 is appropriately determined according to the building.
The lower end of each PC steel wire 22 is connected to the foundation via, for example, a mechanical joint 24 or connected to the PC steel wire 22 of the concrete pillar 10 on the lower floor.
The portions other than the lower end of the PC steel wire 22 are passed through a sleeve so that the prestress can be applied to the concrete column 10 and the column beam joint 14 later, as will be described later. It is designed not to be completely in close contact with concrete.

柱梁接合部１４は、鉄骨梁１２がコンクリート柱１０の上端部１０Ａに結合される箇所である。
柱梁接合部１４は、鉄骨梁部分１２Ａ、上下のバンドプレート３０、囲み板３２、コンクリート３４、挿通孔３６Ａ、３６Ｂとを含んで構成されている。
本実施の形態では、コンクリート柱１０の断面形状と、平面視した柱梁接合部１４の輪郭は等しく、共に矩形を呈しており、それらの形状を同一としコンクリート柱１０と柱梁接合部１４とを上下方向に連続状にすることで、上階のフロアの配筋や型枠などを含んだその他の各種部材をレイアウトする上で有利となっている。 The column beam joint 14 is a portion where the steel beam 12 is coupled to the upper end portion 10 </ b> A of the concrete column 10.
The column beam joint 14 includes a steel beam portion 12A, upper and lower band plates 30, a surrounding plate 32, concrete 34, and insertion holes 36A and 36B.
In the present embodiment, the cross-sectional shape of the concrete column 10 and the outline of the beam-column joint 14 in plan view are equal and both are rectangular, and the shape is the same, and the concrete column 10 and the beam-column joint 14 It is advantageous for laying out various other members including the reinforcement of the upper floor, the formwork, etc., by making the shape continuous in the vertical direction.

鉄骨梁１２は、例えば、鉛直方向に延在するウェブと、ウェブの上下に位置し水平方向に延在する上下のフランジとからなるＨ型鋼である。
鉄骨梁１２は、柱梁接合部１４では複数の鉄骨梁１２が平面視十字状に連結された鉄骨梁部分１２Ａとなっている。 The steel beam 12 is, for example, an H-shaped steel including a web extending in the vertical direction and upper and lower flanges positioned above and below the web and extending in the horizontal direction.
The steel beam 12 is a steel beam portion 12A in which a plurality of steel beams 12 are connected in a cross shape in plan view at the column beam joint 14.

上下のバンドプレート３０は、鉄骨梁１２からコンクリート柱１０への応力の伝達を可能とするもので、鋼製である。
上下のバンドプレート３０は、鉄骨梁部分１２Ａをなす鉄骨梁１２の上下のフランジにそれぞれ溶接やボルト、ナット等により強固に取着されている。
各バンドプレート３０は、コンクリート柱１０の断面と等しい矩形の輪郭を呈し、平面視した場合、各辺をコンクリート柱１０の断面の４辺に合致させて配置され、鉄骨梁１２はそれぞれ矩形の４つの辺の中央部に位置している。なお、４つの鉄骨梁１２が交差する箇所は、コンクリート柱１０の断面の中央から偏心した箇所に配置される場合もある。
各バンドプレート３０の４隅に、コンクリート柱１０の上端部１０Ａから突出するＰＣ鋼線２２を挿通させるように、挿通孔３６Ａがそれぞれ３つずつ形成されている。 The upper and lower band plates 30 enable transmission of stress from the steel beam 12 to the concrete column 10 and are made of steel.
The upper and lower band plates 30 are firmly attached to the upper and lower flanges of the steel beam 12 forming the steel beam portion 12A by welding, bolts, nuts, or the like.
Each band plate 30 has a rectangular outline equal to the cross section of the concrete column 10, and when viewed in plan, each band plate 30 is arranged so that each side matches the four sides of the cross section of the concrete column 10. Located in the middle of one side. In addition, the location where the four steel beams 12 intersect may be arranged at a location eccentric from the center of the cross section of the concrete column 10.
Three insertion holes 36A are formed at four corners of each band plate 30 so that the PC steel wires 22 protruding from the upper end portion 10A of the concrete pillar 10 are inserted.

囲み板３２は柱梁接合部１４のせん断力の向上を図り、同時に、コンクリート型枠を省略するもので、鋼製である。
囲み板３２は、上下のバンドプレート３０の周囲間に取着され、複数の鉄骨梁１２を貫通させて上下のバンドプレート３０の間に内側空間を仕切るように設けられている。
より詳細には、図３に示すように、柱梁接合部１４の４つの側面を構成する各囲み板３２は、Ｈ型の切り欠き３２Ａを挟んだ２つの分割体３２Ｂからなり、それら切り欠き３２Ａに鉄骨梁１２が挿通され、挿通された箇所では切り欠き３２Ａの周辺部と各分割体３２Ｂとが溶接により取着されている。 The surrounding plate 32 improves the shearing force of the column beam joint 14 and at the same time omits the concrete formwork and is made of steel.
The surrounding plate 32 is attached between the upper and lower band plates 30 and is provided so as to partition the inner space between the upper and lower band plates 30 through the plurality of steel beam 12.
More specifically, as shown in FIG. 3, each of the surrounding plates 32 constituting the four side surfaces of the beam-column joint portion 14 is composed of two divided bodies 32B sandwiching an H-shaped notch 32A. The steel beam 12 is inserted through 32A, and the peripheral portion of the notch 32A and each divided body 32B are attached by welding at the inserted portion.

コンクリート３４は内側空間に打設されている。
そしてコンクリート３４には、上下のバンドプレート３０の挿通孔３６Ａに対応する複数の挿通孔３６Ｂが、上下のバンドプレート３０の４隅で互いに直交する鉄骨梁１２の間にそれぞれ設けられている。 The concrete 34 is placed in the inner space.
The concrete 34 is provided with a plurality of insertion holes 36 </ b> B corresponding to the insertion holes 36 </ b> A of the upper and lower band plates 30 between the steel beams 12 orthogonal to each other at the four corners of the upper and lower band plates 30.

このような構成からなる柱梁接合部１４は、下側のバンドプレート３０がコンクリート柱１０の上端部１０Ａにそれら矩形の輪郭が合致するように載置され、コンクリート柱１０の上端部１０Ａから突出する複数のＰＣ鋼線２２が下側のバンドプレート３０の挿通孔３６Ａ、コンクリート３４の挿通孔３６Ｂ、上側の前記バンドプレート３０の挿通孔３６Ａに挿通されて上側のバンドプレート３０から上方に突出される。
そして、ＰＣ鋼線２２が例えばねじ節鉄筋である場合には、上側のバンドプレート３０上においてナットＮを螺合させ回転させることにより各ＰＣ鋼線２２に引っ張り力を掛け、これによりコンクリート柱１０と柱梁接合部１４にプレストレスが掛けられた状態で、柱梁接合部１４とコンクリート柱１０の上端部１０Ａとが結合されている。 The column beam joint 14 having such a structure is placed so that the lower band plate 30 matches the upper end portion 10A of the concrete column 10 with the rectangular outline thereof, and protrudes from the upper end portion 10A of the concrete column 10. A plurality of PC steel wires 22 are inserted into the insertion hole 36A of the lower band plate 30, the insertion hole 36B of the concrete 34, and the insertion hole 36A of the upper band plate 30 and protrude upward from the upper band plate 30. The
When the PC steel wire 22 is, for example, a threaded reinforcing bar, a tensile force is applied to each PC steel wire 22 by screwing and rotating a nut N on the upper band plate 30, thereby the concrete pillar 10. In a state where prestress is applied to the beam-column joint 14, the beam-column joint 14 and the upper end portion 10 </ b> A of the concrete column 10 are coupled.

本実施の形態のハイブリット構造１６によれば、各柱梁接合部１４からその直下のコンクリート柱１０にプレストレスを簡単に確実に導入できるので、コンクリート柱１０の軸耐力および曲げ耐力を簡単に確実に向上できる。
したがって、コンクリート柱１０の断面積を小さくでき、建物の重量を低減し、建物の耐震性能を高める上で有利となる。
また、コンクリート柱１０の上端部１０ＡのＰＣ鋼線２２を柱梁接合部１４に挿通させ、柱梁接合部１４を建て込み一体型とするので、コンクリート型枠などが不要となって躯体工事の簡略化が図れ、躯体工事の工期の短縮化、コストダウンを図る上で有利となる。
また、柱梁接合部１４はその外面に、鋼製の上下のバンドプレート３０および囲み板３２を備えるので、柱梁接合部１４のせん断力が向上し、柱梁接合部１４に高い耐震性能を発揮させる上で有利となる。 According to the hybrid structure 16 of the present embodiment, prestress can be easily and surely introduced from the respective column beam joints 14 to the concrete columns 10 immediately therebelow, so that the axial strength and bending strength of the concrete columns 10 can be easily ensured. Can be improved.
Accordingly, the cross-sectional area of the concrete pillar 10 can be reduced, which is advantageous in reducing the weight of the building and improving the earthquake resistance performance of the building.
Further, the PC steel wire 22 at the upper end portion 10A of the concrete column 10 is inserted into the column beam joint 14 and the column beam junction 14 is built in and integrated, so that a concrete formwork or the like is not required and the frame work is performed. Simplification can be achieved, which is advantageous for shortening the construction period and reducing costs.
In addition, since the beam-column joint portion 14 includes the upper and lower band plates 30 and the surrounding plate 32 made of steel on the outer surface, the shear force of the beam-column joint portion 14 is improved, and the column-beam joint portion 14 has high earthquake resistance. It is advantageous in making it show.

次に、図４（Ａ）、（Ｂ）を参照して柱梁接合部１４の変形例について説明する。
この変形例では、柱梁接合部１４の４隅に位置するＰＣ鋼線２２を、それぞれ鉄骨梁部分１２Ａと協働して囲むように鉄筋４０を配筋したものである。
なお、図面では、鉄骨梁部分１２Ａで４つに仕切られた空間の手前の空間にのみ鉄筋４０を描き他の空間の鉄筋４０を省略しているが、鉄筋４０は、鉄骨梁部分１２Ａで４つに仕切られた空間の全てに配筋される。
図４（Ａ）は、Ｌ字状に屈曲された鉄筋４０Ａを上下方向に間隔をおいて複数設け、それら鉄筋４０Ａの両端を鉄骨梁部分１２Ａに結合させた横補強筋タイプのものである。
図４（Ｂ）は、Ｕ字状に屈曲された鉄筋４０Ｂを上下方向に間隔をおいて複数設け、それら鉄筋４０Ｂの両端を鉄骨梁部分１２Ａに結合させた差し筋タイプのものである。
このような変形例によれば、柱梁接合部１４において鉄骨梁部分１２Ａとコンクリート３４とが鉄筋４０を介してより強固に結合され、鉄骨梁１２からコンクリート柱１０へ応力を伝達する上で有利となり、柱梁接合部１４のせん断力を向上する上で有利となる。 Next, a modified example of the column beam joint 14 will be described with reference to FIGS.
In this modification, reinforcing bars 40 are arranged so as to surround the PC steel wires 22 located at the four corners of the column beam joint 14 in cooperation with the steel beam portions 12A.
In the drawing, the reinforcing bar 40 is drawn only in the space in front of the space divided into four by the steel beam portion 12A, and the reinforcing bars 40 of other spaces are omitted. However, the reinforcing bar 40 has four steel beam portions 12A. The bars are arranged in all of the spaces that are partitioned.
FIG. 4A shows a lateral reinforcing bar type in which a plurality of reinforcing bars 40A bent in an L shape are provided at intervals in the vertical direction, and both ends of the reinforcing bars 40A are coupled to the steel beam portion 12A.
FIG. 4B shows a reinforcing bar type in which a plurality of reinforcing bars 40B bent in a U-shape are provided at intervals in the vertical direction, and both ends of the reinforcing bars 40B are coupled to the steel beam portion 12A.
According to such a modified example, the steel beam portion 12A and the concrete 34 are more firmly coupled to each other through the reinforcing bars 40 in the column beam joint portion 14, which is advantageous in transmitting stress from the steel beam 12 to the concrete column 10. This is advantageous in improving the shearing force of the beam-column joint 14.

なお、柱梁接合部１４は、コンクリート柱１０の上端部１０Ａに載置される前に内側空間にコンクリート３４が打設され養生されたプレキャスト部材であってもよく、あるいは、コンクリートが打設されていない柱梁接合部１４をコンクリート柱１０の上端部１０Ａに載置し、複数のＰＣ鋼材を挿通孔３６に挿通し上側の前記バンドプレート３０から上方に突出させたのちコンクリート３４を打設したもの（現場打ちコンクリート）であってもよい。
また、平面視した柱梁接合部１４の輪郭はコンクリート柱の断面形状よりも大きくてもよく、あるいは、小さくてもよく、要するに、コンクリート柱の上端部から突出する複数のＰＣ鋼材を柱梁接合部１４から上方に突出させることができればよい。
また、鉄骨梁部分１２Ａは鉄骨梁１２が十字状に交差するものに限定されず、例えば、図５（Ａ）に示すようにＴ字状や、図５（Ｂ）に示すようにＬ字状に交差する場合にも無論適用可能である。
また、コンクリート柱１０の断面および平面視した柱梁接合部１４の輪郭は矩形に限らず、図５（Ｃ）に示すように円形や、多角形などであってもよい。 The column beam joint 14 may be a precast member in which concrete 34 is cast and cured in the inner space before being placed on the upper end portion 10A of the concrete column 10, or concrete is cast. The non-column beam joint portion 14 is placed on the upper end portion 10A of the concrete column 10, and a plurality of PC steel materials are inserted into the insertion holes 36 and protruded upward from the band plate 30 on the upper side. Things (on-site concrete) may be used.
Moreover, the outline of the beam-column joint portion 14 in plan view may be larger or smaller than the cross-sectional shape of the concrete column. In short, a plurality of PC steel members protruding from the upper end portion of the concrete column are joined to the beam. What is necessary is just to make it protrude from the part 14 upwards.
Further, the steel beam portion 12A is not limited to the crossing of the steel beam 12 in a cross shape. For example, the steel beam portion 12A has a T shape as shown in FIG. 5 (A) or an L shape as shown in FIG. 5 (B). Of course, it is applicable to the case of crossing.
Further, the cross section of the concrete column 10 and the outline of the beam-column joint 14 in plan view are not limited to a rectangle, but may be a circle or a polygon as shown in FIG.

１０……コンクリート柱、１０Ａ……コンクリート柱の上端部、１２……鉄骨梁、１２Ａ……複数の鉄骨梁が結合された鉄骨梁部分、１４……柱梁接合部、１６……ハイブリット構造、２２……ＰＣ鋼線、３０……バンドプレート、３２……囲み板、３４……内側空間に打設されるコンクリート、４０……鉄筋。   DESCRIPTION OF SYMBOLS 10 ... Concrete column, 10A ... Upper end part of concrete column, 12 ... Steel beam, 12A ... Steel beam part where several steel beams are combined, 14 ... Column beam joint, 16 ... Hybrid structure, 22 ... PC steel wire, 30 ... band plate, 32 ... enclosure, 34 ... concrete placed in the inner space, 40 ... rebar.

Claims (8)

コンクリート柱と複数の鉄骨梁とが結合されたハイブリット構造であって、
前記コンクリート柱の上端部の外周部の周方向に間隔をおいた複数箇所において前記コンクリート柱の下部から上方に延在する複数のＰＣ鋼材がそれぞれ上方に突出しており、
前記複数の鉄骨梁が前記コンクリート柱の上端部に結合される箇所は柱梁接合部とされ、
前記柱梁接合部は、複数の前記鉄骨梁が結合された鉄骨梁部分と、前記鉄骨梁部分の上下に取着された上下のバンドプレートと、前記上下のバンドプレートの周囲間に取着され前記複数の鉄骨梁を貫通させ前記上下のバンドプレートの間に内側空間を仕切る囲み板と、前記内側空間に打設されるコンクリートと、前記複数のＰＣ鋼材を下側の前記バンドプレートから前記コンクリート、上側の前記バンドプレートに挿通させる複数の挿通孔とを有し、
前記柱梁接合部は、下側の前記バンドプレートが前記コンクリート柱の上端部に載置されており、
前記コンクリート柱の上端部から突出する前記複数のＰＣ鋼材が前記挿通孔に挿通されて上側の前記バンドプレートから上方に突出しており、
前記複数のＰＣ鋼材に引っ張り力を掛けることで前記コンクリート柱と前記柱梁接合部にプレストレスが掛けられている、
ことを特徴とするハイブリット構造。 A hybrid structure in which a concrete pillar and a plurality of steel beams are combined,
A plurality of PC steel materials extending upward from the lower part of the concrete column at a plurality of locations spaced in the circumferential direction of the outer peripheral portion of the upper end portion of the concrete column respectively protrude upward.
The place where the plurality of steel beams are joined to the upper end of the concrete column is a column beam joint,
The column beam joint is attached between a steel beam portion in which a plurality of the steel beams are coupled, upper and lower band plates attached above and below the steel beam portion, and the periphery of the upper and lower band plates. A surrounding plate that penetrates the plurality of steel beams to partition an inner space between the upper and lower band plates, concrete that is placed in the inner space, and a plurality of PC steel materials from the lower band plate to the concrete A plurality of insertion holes that are inserted into the upper band plate,
In the beam-column joint, the lower band plate is placed on the upper end of the concrete column,
The plurality of PC steel materials protruding from the upper end of the concrete pillar are inserted through the insertion hole and protrude upward from the upper band plate,
Prestress is applied to the concrete column and the beam-column joint by applying a tensile force to the plurality of PC steel materials,
A hybrid structure characterized by that. コンクリート柱の断面形状と、平面視した前記柱梁接合部の輪郭は共に矩形状を呈し、
前記鉄骨梁部分は、複数の前記鉄骨梁が十字状に連結されて構成され、
前記複数のＰＣ鋼材は前記柱梁接合部の４隅で互いに直交する前記鉄骨梁の間にそれぞれ位置している、
ことを特徴とする請求項１記載のハイブリット構造。 Both the cross-sectional shape of the concrete column and the outline of the beam-beam joint in plan view are rectangular,
The steel beam part is configured by connecting a plurality of the steel beam in a cross shape,
The plurality of PC steel materials are respectively positioned between the steel beams that are orthogonal to each other at the four corners of the beam-column joint.
The hybrid structure according to claim 1. 前記柱梁接合部は、さらに前記柱梁接合部の４隅に位置する前記ＰＣ鋼材を、それぞれ十字状に連結された前記鉄骨梁部分と協働して囲むように配筋された鉄筋を備えている、
ことを特徴とする請求項２記載のハイブリット構造。 The beam-column joint further includes reinforcing bars arranged to surround the PC steel materials positioned at the four corners of the beam-column joint in cooperation with the steel beam portions connected in a cross shape. ing,
The hybrid structure according to claim 2. コンクリート柱の断面形状と、平面視した前記柱梁接合部の輪郭は等しい、
ことを特徴とする請求項１〜３に何れか１項記載のハイブリット構造。 The cross-sectional shape of the concrete column and the outline of the column beam joint in plan view are equal.
The hybrid structure according to any one of claims 1 to 3, wherein: コンクリート柱と複数の鉄骨梁とが結合されたハイブリット構造の構築方法であって、
前記コンクリート柱の上端部の外周部の周方向に間隔をおいた複数箇所から前記コンクリート柱の下部から上方に延在する複数のＰＣ鋼材をそれぞれ上方に突出させ、
前記複数の鉄骨梁が前記コンクリート柱の上端部に結合される柱梁接合部を、前記複数の鉄骨梁が結合された鉄骨梁部分と、前記鉄骨梁部分の上下に取着された上下のバンドプレートと、前記上下のバンドプレートの周囲間に取着され前記複数の鉄骨梁を貫通させて前記上下のバンドプレートの間に内側空間を仕切る囲み板と、前記内側空間に打設されるコンクリートと、前記複数のＰＣ鋼材を下側の前記バンドプレートから前記コンクリート、上側の前記バンドプレートに挿通させる複数の挿通孔とで構成し、
前記柱梁接合部の前記下側のバンドプレートを前記コンクリート柱の上端部に載置し、
前記コンクリート柱の上端部から突出する前記複数のＰＣ鋼材を前記挿通孔に挿通して上側の前記バンドプレートから上方に突出させ、
前記上側のバンドプレート上において前記複数のＰＣ鋼材に引っ張り力を掛けることで前記コンクリート柱と前記柱梁接合部にプレストレスを掛けるようにした、
ことを特徴とするハイブリット構造の構築方法。 A method for constructing a hybrid structure in which a concrete column and a plurality of steel beams are combined,
A plurality of PC steel members extending upward from the lower part of the concrete column from a plurality of locations spaced in the circumferential direction of the outer peripheral portion of the upper end of the concrete column are respectively projected upward.
A column beam joint where the plurality of steel beams are coupled to an upper end portion of the concrete column, a steel beam portion where the plurality of steel beams are coupled, and an upper and lower band attached above and below the steel beam portion A plate, a surrounding plate that is attached between the upper and lower band plates and penetrates the plurality of steel beams to partition an inner space between the upper and lower band plates, and a concrete that is placed in the inner space The plurality of PC steel materials are composed of a plurality of insertion holes through which the concrete and the upper band plate are inserted from the lower band plate.
Place the lower band plate of the beam-column joint on the upper end of the concrete column,
The plurality of PC steel members protruding from the upper end of the concrete pillar are inserted through the insertion hole and protruded upward from the upper band plate,
By applying a tensile force to the plurality of PC steel materials on the upper band plate, prestress is applied to the concrete column and the column beam joint.
A method for constructing a hybrid structure. コンクリート柱の断面形状と、平面視した前記柱梁接合部の輪郭は共に矩形状を呈し、
前記柱梁接合部は、前記複数の鉄骨梁が十字状に連結されて構成され、
前記複数のＰＣ鋼材は前記柱梁接合部の４隅で互いに直交する前記鉄骨梁の間にそれぞれ位置している、
ことを特徴とする請求項５記載のハイブリット構造の構築方法。 Both the cross-sectional shape of the concrete column and the outline of the beam-beam joint in plan view are rectangular,
The column beam joint is configured by connecting the plurality of steel beams in a cross shape,
The plurality of PC steel materials are respectively positioned between the steel beams that are orthogonal to each other at the four corners of the beam-column joint.
The method for constructing a hybrid structure according to claim 5. 前記柱梁接合部は、前記コンクリート柱の上端部に載置される前に、前記内側空間にコンクリートが打設されたプレキャスト部材である、
ことを特徴とする請求項５または６記載のハイブリット構造の構築方法。 The column beam joint is a precast member in which concrete is placed in the inner space before being placed on the upper end of the concrete column.
The method for constructing a hybrid structure according to claim 5 or 6. 前記内側空間へのコンクリートへの打設は、前記柱梁接合部を前記コンクリート柱の上端部に載置し、前記複数のＰＣ鋼材を前記挿通孔に挿通し上側の前記バンドプレートから上方に突出させたのち行なわれる、
ことを特徴とする請求項５または６記載のハイブリット構造の構築方法。 For placing the concrete in the inner space, the column beam joint is placed on the upper end of the concrete column, and the plurality of PC steel materials are inserted into the insertion holes and protrude upward from the band plate on the upper side. Done after
The method for constructing a hybrid structure according to claim 5 or 6.
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JP2019143422A (en) * 2018-02-23 2019-08-29 株式会社フジタ Reinforcement structure of column-beam connection portion
JP7011490B2 (en) 2018-02-23 2022-01-26 株式会社フジタ Reinforcing structure of beam-column joint

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