JP7483569B2 - Outer shell PCa member piece of column and outer shell PCa member of column - Google Patents

Outer shell PCa member piece of column and outer shell PCa member of column Download PDF

Info

Publication number
JP7483569B2
JP7483569B2 JP2020154121A JP2020154121A JP7483569B2 JP 7483569 B2 JP7483569 B2 JP 7483569B2 JP 2020154121 A JP2020154121 A JP 2020154121A JP 2020154121 A JP2020154121 A JP 2020154121A JP 7483569 B2 JP7483569 B2 JP 7483569B2
Authority
JP
Japan
Prior art keywords
column
pca
reinforcement
outer shell
main
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2020154121A
Other languages
Japanese (ja)
Other versions
JP2022048018A (en
Inventor
昭夫 春日
健治 田野
健太郎 松永
樹里也 井上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Mitsui Construction Co Ltd
Original Assignee
Sumitomo Mitsui Construction Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Mitsui Construction Co Ltd filed Critical Sumitomo Mitsui Construction Co Ltd
Priority to JP2020154121A priority Critical patent/JP7483569B2/en
Publication of JP2022048018A publication Critical patent/JP2022048018A/en
Application granted granted Critical
Publication of JP7483569B2 publication Critical patent/JP7483569B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Rod-Shaped Construction Members (AREA)

Description

本開示は、柱の断面の一部をなす外殻PCa部材片及び、複数の外殻PCa部材片を含む外殻PCa部材に関する。 The present disclosure relates to an outer shell PCa member piece that forms part of the cross section of a column, and an outer shell PCa member that includes multiple outer shell PCa member pieces.

鉄筋コンクリート造の柱(以下、RC柱という)をプレキャストコンクリート(以下、PCaという)により構成する場合には、柱の全断面をPCa化したフルPCa構造にする方法と、柱の断面の一部をPCa化したハーフPCa構造とする方法との2種類がある。RC柱をハーフPCa構造にすると、フルPCa構造にする場合に比べてPCa部材を軽量化できるため、クレーンの大型化を防ぐことができる。柱をハーフPCa構造にする場合には、柱の外殻部をPCa化した外殻PCa部材とすることが多い。外殻PCa部材は現場打ちコンクリートの型枠代わりになるため、現場での型枠組立工程が不要になる。そのため、柱の全体を現場打ちコンクリートにより構築する従来工法に比べて工期の短縮が図れる。 When constructing reinforced concrete columns (hereinafter referred to as RC columns) using precast concrete (hereinafter referred to as PCa), there are two methods: a full PCa structure in which the entire cross section of the column is PCa-processed, and a half PCa structure in which only part of the column's cross section is PCa-processed. When an RC column is made into a half PCa structure, the PCa members can be made lighter than when it is made into a full PCa structure, so it is possible to prevent the crane from becoming larger. When making a column into a half PCa structure, the outer shell of the column is often made into an outer shell PCa member that is PCa-processed. Since the outer shell PCa member serves as a formwork for cast-in-place concrete, there is no need for a formwork assembly process on-site. This allows for a shorter construction period than the conventional method of constructing the entire column from cast-in-place concrete.

柱の外殻PCa部材(外殻PCa柱部材)として、中空で断面が矩形形状のPCaコンクリート部の内部に柱主筋とせん断補強筋(帯筋)とが埋設されたものが公知である(例えば、特許文献1の図5参照)。この外殻PCa部材では、せん断補強筋がコ字形状をなす2本の同形状の鉄筋によって矩形に形成され、それぞれの鉄筋の両端部が立ち上り部として内側に折り曲げられてPCaコンクリート部の内表面から延出するように配置される。立ち上り部分の先端が現場打ちコンクリートに埋設されることにより、外殻PCa部材と現場打ちコンクリートとの充分な一体性が得られる。 A known outer shell PCa member for a column (outer shell PCa column member) has column main reinforcement and shear reinforcement (hoop reinforcement) embedded inside a hollow PCa concrete section with a rectangular cross section (see, for example, Figure 5 of Patent Document 1). In this outer shell PCa member, the shear reinforcement is formed into a rectangle by two identical rebars that form a U-shape, and both ends of each rebar are bent inward as rising sections and are arranged to extend from the inner surface of the PCa concrete section. By embedding the tips of the rising sections in the cast-in-place concrete, sufficient integrity is obtained between the outer shell PCa member and the cast-in-place concrete.

また、柱の外殻PCa部材が、断面において分割された2つのPCa部材片から構成されたものが公知である(例えば、特許文献2の図1及び図3参照)。この外殻PCa部材は、両PCa部材片を対向して当接配置することによって断面ロ形に形成され、その内部に打設される現場打ちコンクリートの型枠を兼ねる。各PCa部材片は、コ字形断面やL字形断面等に形成される。 It is also known that the outer shell PCa member of a column is composed of two PCa member pieces divided in cross section (see, for example, Figures 1 and 3 of Patent Document 2). This outer shell PCa member is formed with a cross section shaped like a square by placing the two PCa member pieces facing each other and abutting each other, and also serves as a formwork for the cast-in-place concrete that is poured inside. Each PCa member piece is formed with a U-shaped or L-shaped cross section, etc.

実開平5-67701号公報Japanese Utility Model Application Publication No. 5-67701 特開平8-42059号公報Japanese Patent Application Laid-Open No. 8-42059

従来の柱用の外殻PCa部材を用いることにより、現場での工数を減らし、人工を減らすことができる。一方、PCa部材を製造する工場での人工を減らすことはできない。ここで、PCa工場での人工を減らし、生産性を向上させるために、PCa部材の製造工程の一部をロボット化することが考えられる。しかしながら、従来の外殻PCa部材の鉄筋は立体的な形状をしているため、そのような複雑な作業を伴う配筋工程のロボット化は困難であった。 By using conventional outer shell PCa components for columns, it is possible to reduce on-site man-hours and labor. However, it is not possible to reduce labor at the factory where the PCa components are manufactured. Here, in order to reduce labor at the PCa factory and improve productivity, it is possible to robotize part of the manufacturing process for PCa components. However, because the rebars in conventional outer shell PCa components have a three-dimensional shape, it has been difficult to robotize the reinforcing bar arrangement process, which involves such complex work.

本発明は、このような背景に鑑み、柱用の外殻PCa部材について、PCa工場での配筋工程のロボット化を容易にすることを課題とする。 In light of this background, the present invention aims to facilitate the robotization of the reinforcement process at PCa factories for outer shell PCa components for columns.

このような課題を解決するために、本発明のある実施形態は、多角形断面を有する柱(1)の外殻部の一部をなす外殻PCa部材片(4)であって、前記柱の外周面(1a)に沿って配置される平板状のPCa部(5)と、前記PCa部に一体に設けられ、少なくとも帯筋(9)を含む柱筋(6)とを備え、前記PCa部は、断面において、前記柱の前記外周面の1辺をなす外面(13)と、前記外面と略平行に延在する内面(14)と、前記外面と前記内面とを接続し、前記柱の主筋(7)のうち前記柱の隅部に配置される隅主筋(7A)を当該PCa部に埋設させないように傾斜する1対の傾斜側面(15)とを有し、前記帯筋が、前記PCa部から延出する両端を有する直線状の帯筋主部(10)と、前記帯筋主部の前記両端から前記柱の内方へ折り曲げられ、前記隅主筋に係合する1対のフック(11)とを備える。 In order to solve such problems, in one embodiment of the present invention, a shell PCa member piece (4) forming a part of the outer shell of a column (1) having a polygonal cross section is provided with a flat PCa part (5) arranged along the outer peripheral surface (1a) of the column, and a column reinforcement (6) including at least a tie bar (9) that is integrally provided with the PCa part, and the PCa part has, in cross section, an outer surface (13) that forms one side of the outer peripheral surface of the column, an inner surface (14) that extends approximately parallel to the outer surface, and a pair of inclined side surfaces (15) that connect the outer surface and the inner surface and are inclined so that the corner main reinforcement (7A) of the main reinforcement (7) of the column that is arranged at the corner of the column is not embedded in the PCa part , and the tie bar is provided with a straight tie bar main part (10) having both ends extending from the PCa part, and a pair of hooks (11) that are bent from both ends of the tie bar main part toward the inside of the column and engage with the corner main reinforcement.

この構成によれば、PCa部に一体に設けられる帯筋の帯筋主部が直線状をなすため、外殻PCa部材片の配筋工程のロボット化が容易である。PCa部が平板状であっても、複数の外殻PCa部材片を多角形状に配置して閉断面形状の外殻PCa部材にすることができる。その際、1対の傾斜側面が隅主筋を埋設させないように傾斜しているため、互いに近接するPCa部の傾斜側面間に空隙が形成され、この空隙に隅主筋が配置可能になる。また、帯筋が隅主筋に係合するフックを介して連続する多角形の閉環状になる。 According to this configuration, the main part of the tie bar integrally provided in the PCa section is linear, so that the reinforcing bar arrangement process of the shell PCa member pieces can be easily robotized. Even if the PCa section is flat, multiple shell PCa member pieces can be arranged in a polygonal shape to form a shell PCa member with a closed cross section. In this case, since a pair of inclined side surfaces are inclined so that the corner main reinforcement cannot be buried , a gap is formed between the inclined side surfaces of the adjacent PCa sections, and the corner main reinforcement can be arranged in this gap. In addition, the tie bars form a continuous polygonal closed ring shape via the hooks that engage with the corner main reinforcement.

好ましくは、前記傾斜側面(15)のそれぞれが、前記外面(13)から連続し、前記多角形断面の対応する頂点の内角(θ)の半分の角度(θ/2)をもって前記外面に対して傾斜する外側面部(16)と、前記外側面部から連続し、前記外側面部の延長線(17)に対して凹陥する内側面部(18)とを有するとよい。 Preferably, each of the inclined sides (15) has an outer side portion (16) that is continuous with the outer surface (13) and inclined with respect to the outer surface at an angle (θ/2) that is half the interior angle (θ) of the corresponding vertex of the polygonal cross section, and an inner side portion (18) that is continuous with the outer side portion and recessed with respect to an extension line (17) of the outer side portion.

この構成によれば、複数の外殻PCa部材片を多角形状に配置する際に、互いに近接するPCa部の外側面部同士を面接触の態様で当接させることができる。したがって、互いに近接する外殻PCa部材片の相対位置の調整が容易である。また、当接によるPCa部の破損が抑制される。 With this configuration, when multiple outer shell PCa component pieces are arranged in a polygonal shape, the outer surface portions of adjacent PCa sections can be abutted in a surface-to-surface contact manner. This makes it easy to adjust the relative positions of the adjacent outer shell PCa component pieces. In addition, damage to the PCa sections due to abutment is suppressed.

また、上記課題を解決するために、本発明のある実施形態は、多角形断面を有する柱(1)の外殻部をなす外殻PCa部材(2)であって、前記柱の断面において周方向に分割された複数の外殻PCa部材片(4)を含み、前記外殻PCa部材片のそれぞれが、前記柱の外周面(1a)に沿って配置される平板状のPCa部(5)と、前記PCa部に一体に設けられ、少なくとも帯筋(9)を含む柱筋(6)とを備え、前記PCa部は、断面において、前記柱の前記外周面の1辺をなす外面(13)と、前記外面と略平行に延在する内面(14)と、前記外面と前記内面とを接続し、前記柱の主筋(7)のうち前記柱の隅部に配置される隅主筋(7A)を当該PCa部に埋設させないように傾斜する1対の傾斜側面(15)とを有し、前記帯筋が、前記PCa部から延出する両端を有する直線状の帯筋主部(10)と、前記帯筋主部の前記両端から前記柱の内方へ折り曲げられ、前記隅主筋に係合する1対のフック(11)とを備え、隣接配置される1対の前記外殻PCa部材片の互いに隣接する前記傾斜側面の間に、前記隅主筋を配置するための空隙(G)が形成される。 In order to solve the above-mentioned problems, one embodiment of the present invention provides an outer shell PCa member (2) forming an outer shell of a column (1) having a polygonal cross section, the outer shell PCa member including a plurality of outer shell PCa member pieces (4) divided in the circumferential direction in the cross section of the column, each of the outer shell PCa member pieces including a flat PCa portion (5) arranged along the outer peripheral surface (1a) of the column and a column reinforcement (6) including at least a hoop reinforcement (9) that is integral with the PCa portion, the PCa portion being provided with an outer surface (13) that forms one side of the outer peripheral surface of the column in cross section, and an inner surface (14) that extends approximately parallel to the outer surface. (14), and a pair of inclined side surfaces (15) that connect the outer surface and the inner surface and are inclined so as not to embed the corner main reinforcement (7A) of the main reinforcement of the column at the corner of the column among the main reinforcement of the column (7) in the PCa portion, the hoop reinforcement has a straight hoop main part (10) having both ends extending from the PCa portion, and a pair of hooks (11) that are bent from both ends of the hoop main part toward the inside of the column and engage with the corner main reinforcement, and a gap (G) for placing the corner main reinforcement is formed between the adjacent inclined side surfaces of a pair of the outer shell PCa member pieces that are arranged adjacent to each other.

この構成によれば、PCa部に一体に設けられる帯筋の帯筋主部が直線状をなすため、外殻PCa部材を構成する外殻PCa部材片の配筋工程のロボット化が容易である。各外殻PCa部材片のPCa部が平板状であっても、複数の外殻PCa部材片を多角形状に配置して閉断面形状の外殻PCa部材にすることができる。その際、1対の傾斜側面が隅主筋を埋設させないように傾斜しているため、互いに近接するPCa部の傾斜側面間に空隙が形成され、この空隙に隅主筋が配置可能になる。また、帯筋が隅主筋に係合するフックを介して連続する多角形の閉環状になる。 According to this configuration, the main part of the tie bar integrally provided in the PCa section is linear, so that the reinforcing bar arrangement process of the shell PCa member pieces constituting the shell PCa member can be easily robotized. Even if the PCa section of each shell PCa member piece is flat, multiple shell PCa member pieces can be arranged in a polygonal shape to form a shell PCa member with a closed cross section. In this case, since a pair of inclined side surfaces are inclined so that the corner main reinforcement is not embedded , a gap is formed between the inclined side surfaces of the adjacent PCa sections, and the corner main reinforcement can be arranged in this gap. In addition, the tie bar forms a polygonal closed ring shape that continues through the hook that engages with the corner main reinforcement.

好ましくは、前記外殻PCa部材片(4)の前記柱筋(6)が、前記主筋(7)のうち前記隅部以外の部分に配置される中間主筋(7B)を含み、前記外殻PCa部材片(4)のそれぞれが、関連する前記中間主筋(7B)に係合する外フック(32)及び前記柱(1)の中心に配置される芯筋(34)に係合する内フック(33)を有するフック付き鉄筋(31)を更に含むとよい。 Preferably, the column reinforcement (6) of the outer shell PCa component piece (4) includes intermediate main reinforcement (7B) arranged in a portion of the main reinforcement (7) other than the corner portion, and each of the outer shell PCa component pieces (4) further includes a hooked reinforcing bar (31) having an outer hook (32) that engages with the associated intermediate main reinforcement (7B) and an inner hook (33) that engages with a core reinforcement (34) arranged at the center of the column (1).

この構成によれば、複数の外殻PCa部材片がフック付き鉄筋によって拘束される。そのため、外殻PCa部材の形状維持が容易である。 With this configuration, multiple outer shell PCa component pieces are restrained by the hooked reinforcing bars. This makes it easy to maintain the shape of the outer shell PCa component.

好ましくは、前記柱(1)が偶数の辺からなる偶数角形断面を有し、前記外殻PCa部材片(4)の前記柱筋(6)が、前記主筋(7)のうち前記隅部以外の部分に配置される中間主筋(7B)を含み、互いに対向して配置される1対の前記外殻PCa部材片(4)のそれぞれが、関連する前記中間主筋に係合する外側フック(42)を有し、内側部分にて互いに継ぎ合わされる中子筋片(41)を更に含むとよい。 Preferably, the column (1) has an even-numbered polygonal cross section with an even number of sides, the column reinforcement (6) of the outer shell PCa member piece (4) includes intermediate main reinforcement (7B) arranged in a portion of the main reinforcement (7) other than the corner portion, and each of the pair of outer shell PCa member pieces (4) arranged opposite each other has an outer hook (42) that engages with the associated intermediate main reinforcement, and further includes a core reinforcement piece (41) that is joined to each other at the inner portion.

この構成によれば、対向配置される1対の外殻PCa部材片同士が互いに継ぎ合わされた中子筋片によって連結され複数の外殻PCa部材片によって構成される外殻PCa部材の形状が維持される。 With this configuration, a pair of outer shell PCa member pieces arranged opposite each other are connected by a jointed core piece, and the shape of the outer shell PCa member composed of multiple outer shell PCa member pieces is maintained.

このように本発明によれば、柱用の外殻PCa部材について、PCa工場での配筋工程のロボット化を容易にすることができる。 In this way, the present invention makes it easier to robotize the reinforcement process at PCa factories for outer shell PCa components for columns.

第1実施形態に係る柱の断面図Cross-sectional view of a pillar according to the first embodiment 図1に示す外殻PCa部材片の断面図Cross-sectional view of the outer shell PCa member piece shown in FIG. 図1に示す柱の構築手順を示す断面図2 is a cross-sectional view showing the construction procedure of the column shown in FIG. 第2実施形態に係る柱の梁接合部の斜視図FIG. 13 is a perspective view of a column beam joint according to a second embodiment; 図4に示す柱の断面図Cross-section of the pillar shown in FIG. 第3実施形態に係る柱の構築手順を示す断面図13A to 13C are cross-sectional views showing a procedure for constructing a pillar according to a third embodiment. 第4実施形態に係る柱の構築手順を示す断面図13A to 13C are cross-sectional views showing a procedure for constructing a pillar according to a fourth embodiment. 第5実施形態に係る柱の構築手順を示す断面図13A to 13C are cross-sectional views showing a procedure for constructing a pillar according to a fifth embodiment. 第6実施形態に係る柱の構築手順を示す断面図13A to 13C are cross-sectional views showing a procedure for constructing a pillar according to the sixth embodiment. 第7実施形態に係る柱の外殻PCa部材の断面図Cross-sectional view of the outer shell PCa member of the column according to the seventh embodiment 第8実施形態に係る柱の外殻PCa部材の断面図Cross-sectional view of the outer shell PCa member of the column according to the eighth embodiment 第9実施形態に係る柱の外殻PCa部材の断面図Cross-sectional view of the outer shell PCa member of the column according to the ninth embodiment

以下、図面を参照して、本発明のいくつかの実施形態について詳細に説明する。 Below, several embodiments of the present invention will be described in detail with reference to the drawings.

≪第1実施形態≫
まず、図1~図3を参照して本発明の第1実施形態について説明する。図1は第1実施形態に係る柱1の断面図である。図1に示すように、柱1は、鉄筋によってコンクリートを補強された鉄筋コンクリート(RC)造である。柱1は、プレキャストコンクリートによって構成された外殻部(以下、外殻PCa部材2という)と、現場打ちコンクリートによって外殻PCa部材2の内側に構成された現場打ち部3とを有している。柱1は断面矩形状をなし、本実施形態では断面正方形をなしている。他の実施形態では、柱1の断面が四角形以外の多角形(例えば五角形や、六角形、八角形など)をなしていてもよい。なお、柱1の断面は、正多角形である必要はなく、例えば長方形であってもよい。
First Embodiment
First, a first embodiment of the present invention will be described with reference to Figs. 1 to 3. Fig. 1 is a cross-sectional view of a column 1 according to the first embodiment. As shown in Fig. 1, the column 1 is made of reinforced concrete (RC) in which concrete is reinforced by steel bars. The column 1 has an outer shell portion (hereinafter referred to as an outer shell PCa member 2) made of precast concrete and a cast-in-place portion 3 made of cast-in-place concrete inside the outer shell PCa member 2. The column 1 has a rectangular cross section, which is a square cross section in this embodiment. In other embodiments, the column 1 may have a cross section of a polygon other than a quadrangle (e.g., a pentagon, a hexagon, an octagon, etc.). The cross section of the column 1 does not need to be a regular polygon, and may be, for example, a rectangle.

外殻PCa部材2は、断面における柱1の外周面1aの辺の数に応じた数の外殻PCa部材片4によって構成されている。本実施形態では、柱1の断面が四角形であるため、4つの外殻PCa部材片4によって外殻PCa部材2が構成されている。柱1の断面が正方形であるため、4つの外殻PCa部材片4はすべて同一形状とされている。各外殻PCa部材片4は、柱1の外周面1aに沿って配置される平板状のプレキャストコンクリート部(以下、PCa部5という)と、PCa部5に一体に設けられる柱筋6の一部とを備えている。柱筋6の一部は、大半の部分においてPCa部5に埋設され、一部においてPCa部5から延出して現場打ち部3に埋設されている。 The outer shell PCa member 2 is composed of outer shell PCa member pieces 4 in a number corresponding to the number of sides of the outer peripheral surface 1a of the column 1 in the cross section. In this embodiment, since the cross section of the column 1 is rectangular, the outer shell PCa member 2 is composed of four outer shell PCa member pieces 4. Since the cross section of the column 1 is square, all four outer shell PCa member pieces 4 have the same shape. Each outer shell PCa member piece 4 has a flat precast concrete section (hereinafter referred to as PCa section 5) arranged along the outer peripheral surface 1a of the column 1, and a portion of the column reinforcement 6 that is integrally provided with the PCa section 5. The majority of the portion of the column reinforcement 6 is embedded in the PCa section 5, and a portion extends from the PCa section 5 and is embedded in the cast-in-place section 3.

柱筋6は、周方向に間隔を空けて配置された複数の柱主筋7(7A、7B)と、これらの柱主筋7を取り囲むように柱主筋7の外側に配置された閉環状の環状帯筋8とを含む。柱筋6は柱1の内部、具体的には柱1の外周面1aから所定の被り厚を確保した位置に埋設されている。環状帯筋8は柱1の長手方向に所定間隔をもって複数配置されている。 The column reinforcement 6 includes a number of column main reinforcement bars 7 (7A, 7B) spaced apart in the circumferential direction, and annular tie bars 8 in the form of a closed ring arranged on the outside of the column main reinforcement bars 7 so as to surround the column main reinforcement bars 7. The column reinforcement bars 6 are embedded inside the column 1, specifically at a position that ensures a specified covering thickness from the outer peripheral surface 1a of the column 1. A number of annular tie bars 8 are arranged at specified intervals in the longitudinal direction of the column 1.

柱主筋7は、柱1の断面における隅部に配置される複数の隅主筋7Aと、隅部以外の部分、すなわち周方向に隣接する1対の隅主筋7Aの間に配置される複数の中間主筋7Bとを含んでいる。本実施形態では、柱1の断面が四角形であるため、4本の隅主筋7Aが設けられている。中間主筋7Bは1対の隅主筋7Aの間に3本ずつ配置され、合計で12本の中間主筋7Bが設けられている。隅主筋7Aは現場打ち部3に配置され、中間主筋7Bは外殻PCa部材片4のPCa部5に配置されている。 The column main reinforcements 7 include multiple corner main reinforcements 7A arranged at the corners of the cross section of the column 1, and multiple intermediate main reinforcements 7B arranged in the parts other than the corners, i.e., between a pair of circumferentially adjacent corner main reinforcements 7A. In this embodiment, since the cross section of the column 1 is rectangular, four corner main reinforcements 7A are provided. Three intermediate main reinforcements 7B are arranged between each pair of corner main reinforcements 7A, for a total of 12 intermediate main reinforcements 7B. The corner main reinforcements 7A are arranged in the cast-in-place section 3, and the intermediate main reinforcements 7B are arranged in the PCa section 5 of the outer shell PCa member piece 4.

環状帯筋8は、4つの外殻PCa部材片4のPCa部5に一部を埋設された4本の帯筋9(環状帯筋8の一部を構成する帯筋片)によって閉環状に形成される。4本の帯筋9は同一形状をなしており、それぞれ、PCa部5から延出する両端を有する直線状の帯筋主部10と、帯筋主部10の両端から柱1の内方へ折り曲げられ、隅主筋7Aに係合する1対のフック11とを備えている。帯筋主部10は、柱1の外周面1aの1辺に平行に延在している。フック11は、折り曲げ角度が135°である135°フックとされている。 The annular tie bars 8 are formed into a closed ring by four tie bars 9 (tie bars constituting part of the annular tie bars 8) partially embedded in the PCa parts 5 of the four outer shell PCa member pieces 4. The four tie bars 9 are of the same shape, and each has a straight tie bar main part 10 with both ends extending from the PCa parts 5, and a pair of hooks 11 that are bent from both ends of the tie bar main part 10 toward the inside of the column 1 and engage with the corner main bars 7A. The tie bar main part 10 extends parallel to one side of the outer peripheral surface 1a of the column 1. The hooks 11 are 135° hooks with a bending angle of 135°.

図2の断面図に示すように、外殻PCa部材片4のPCa部5は、柱1の外周面1aの1辺をなす外面13と、外面13と略平行に延在する内面14と、1対の傾斜側面15とを有している。1対の傾斜側面15は、外面13と内面14とを接続し、近接する柱1の隅部に配置される2本の隅主筋7AをPCa部5に埋設させないように傾斜している。傾斜側面15のそれぞれは、外面13から連続する外側面部16と、外側面部16から連続する内側面部18とを有している。外側面部16は、四多角形断面の対応する頂点の内角θ(=90°)の半分の角度θ/2(=45°)をもって外面13に対して傾斜している。内側面部18は、外側面部16の延長線17に対して凹陥している。 As shown in the cross-sectional view of FIG. 2, the PCa portion 5 of the outer shell PCa member piece 4 has an outer surface 13 forming one side of the outer peripheral surface 1a of the column 1, an inner surface 14 extending approximately parallel to the outer surface 13, and a pair of inclined side surfaces 15. The pair of inclined side surfaces 15 connect the outer surface 13 and the inner surface 14, and are inclined so that two corner main reinforcements 7A arranged at the corners of the adjacent column 1 are not embedded in the PCa portion 5. Each of the inclined side surfaces 15 has an outer surface portion 16 continuing from the outer surface 13, and an inner surface portion 18 continuing from the outer surface portion 16. The outer surface portion 16 is inclined with respect to the outer surface 13 at an angle θ/2 (=45°) which is half the interior angle θ (=90°) of the corresponding vertex of the quadrilateral cross section. The inner surface portion 18 is recessed with respect to the extension line 17 of the outer surface portion 16.

次に、柱1の構築手順について、図3を参照して説明する。図3(A)に示すように、4つの外殻PCa部材片4を用意し、これらを図3(B)に示すように、四角形状に配置する。この際、互いに近接するPCa部5の外側面部16同士を面接触の態様で当接させる。これにより、4つの外殻PCa部材片4によって正方形の中空断面の外殻PCa部材2が形成され、互いに隣接するPCa部5の内側面部18間に空隙Gが形成される。帯筋9は、フック11がこの空隙Gに納まり、且つ互いに隣接する帯筋9のフック11が重なりあって両者間に隅主筋7Aを配置可能な隙間が生じるように構成されている。 Next, the construction procedure of the column 1 will be described with reference to FIG. 3. As shown in FIG. 3(A), four outer shell PCa member pieces 4 are prepared, and these are arranged in a rectangular shape as shown in FIG. 3(B). At this time, the outer surface portions 16 of adjacent PCa sections 5 are abutted in a surface contact manner. As a result, the four outer shell PCa member pieces 4 form an outer shell PCa member 2 with a square hollow cross section, and a gap G is formed between the inner surface portions 18 of adjacent PCa sections 5. The tie bars 9 are configured so that the hooks 11 fit into this gap G, and the hooks 11 of adjacent tie bars 9 overlap to create a gap between them in which the corner main reinforcement bars 7A can be placed.

図3(C)に示すように、4本の隅主筋7Aを柱1の隅部、具体的には互いに隣接する帯筋9のフック11の間に配置する。その後、外殻PCa部材2の中空部に現場打ちコンクリートを打設することにより、図1に示す柱1が構築される。 As shown in Figure 3 (C), four corner reinforcements 7A are placed at the corners of the column 1, specifically between the hooks 11 of adjacent tie bars 9. Then, by pouring in-situ concrete into the hollow portion of the outer shell PCa member 2, the column 1 shown in Figure 1 is constructed.

このように、各外殻PCa部材片4のPCa部5が平板状であっても、4つの外殻PCa部材片4を四角形状に配置して閉断面形状の外殻PCa部材2にすることができる。その際、1対の傾斜側面15が隅主筋7AをPCa部5に埋設させないように傾斜しているため、互いに近接するPCa部5の傾斜側面15間に空隙Gが形成され、この空隙Gに隅主筋7Aが配置可能になる。また、帯筋9が隅主筋7Aに係合するフック11を介して連続する四角形の閉環状になる。 In this way, even if the PCa portion 5 of each outer PCa component piece 4 is flat, four outer PCa component pieces 4 can be arranged in a quadrangular shape to form an outer PCa component 2 with a closed cross-sectional shape. At this time, since a pair of inclined side surfaces 15 are inclined so as not to embed the corner main reinforcement 7A in the PCa portion 5 , a gap G is formed between the inclined side surfaces 15 of the PCa portions 5 adjacent to each other, and the corner main reinforcement 7A can be arranged in this gap G. In addition, the hoop reinforcement 9 forms a continuous quadrangular closed ring shape via the hooks 11 that engage with the corner main reinforcement 7A.

本実施形態では、上記のように、傾斜側面15の外側面部16が、外面13から連続し、四角形断面の対応する頂点の内角θの半分の角度θ/2をもって外面13に対して傾斜している。そのため、4つの外殻PCa部材片4を四角形状に配置する際に、互いに近接するPCa部5の外側面部16同士を面接触の態様で当接させることができる。したがって、互いに近接する外殻PCa部材片4の相対位置の調整が容易である。また、当接によるPCa部5の破損が抑制される。 In this embodiment, as described above, the outer surface portion 16 of the inclined side surface 15 is continuous with the outer surface 13 and is inclined with respect to the outer surface 13 at an angle θ/2, which is half the interior angle θ of the corresponding vertex of the rectangular cross section. Therefore, when the four outer shell PCa component pieces 4 are arranged in a rectangular shape, the outer surface portions 16 of the PCa parts 5 that are adjacent to each other can be abutted in a surface contact manner. Therefore, it is easy to adjust the relative positions of the outer shell PCa component pieces 4 that are adjacent to each other. In addition, damage to the PCa parts 5 due to abutment is suppressed.

なお、本実施形態では、傾斜側面15の外側面部16から連続する内側面部18が、外側面部16の延長線17に対して凹陥している。これにより、4つの外殻PCa部材片4を四角形状に配置した際に、隣接配置される1対の外殻PCa部材片4の互いに隣接する傾斜側面15の間に、隅主筋7Aを配置するための空隙Gが形成される。 In this embodiment, the inner surface portion 18 continuing from the outer surface portion 16 of the inclined side surface 15 is recessed with respect to the extension line 17 of the outer surface portion 16. As a result, when the four outer shell PCa component pieces 4 are arranged in a rectangular shape, a gap G for placing the corner main reinforcement 7A is formed between the adjacent inclined side surfaces 15 of a pair of adjacently arranged outer shell PCa component pieces 4.

そして外殻PCa部材片4のPCa部5が柱1の外周面1aに沿って配置される平板状をなし、PCa部5に一体に設けられる帯筋主部10がPCa部5から延出する両端を有する直線状をなすため、外殻PCa部材片4の配筋工程のロボット化が容易である。 The PCa portion 5 of the outer PCa component piece 4 is flat and arranged along the outer peripheral surface 1a of the column 1, and the main tie bar portion 10 integrally formed with the PCa portion 5 is linear with both ends extending from the PCa portion 5, making it easy to robotize the reinforcement process for the outer PCa component piece 4.

≪第2実施形態≫
次に、図4及び図5を参照して本発明の第2実施形態について説明する。なお、第1実施形態と形態又は機能が同一又は同様の要素には同一の符号を付し、重複する説明は省略し、説明をしない符号の一部は図示省略する。以降の実施形態においても同様とする。
Second Embodiment
Next, a second embodiment of the present invention will be described with reference to Fig. 4 and Fig. 5. Elements having the same or similar form or function as those in the first embodiment are given the same reference numerals, and duplicated explanations are omitted. Some reference numerals that are not explained are omitted from the drawings. The same applies to the following embodiments.

図4は、第2実施形態に係る柱1の梁接合部20の斜視図である。図4に示すように、柱1は第1実施形態と同様にRC造である一方、梁21は鉄骨(S)造とされている。柱1の梁接合部20は、梁21が柱1を貫通するように設けられた梁貫通型と呼ばれる柱RC梁S構造となっている。柱1の梁接合部20において、梁21が十字状に交差している。柱1の柱主筋7は、梁21によって区分された柱1の4隅に配置されている。柱1の梁接合部20の外周部には、溶接により梁21と一体化した4つのふさぎ板22が環状をなして柱1を取り囲むように配置されている。 Figure 4 is a perspective view of the beam joint 20 of the column 1 according to the second embodiment. As shown in Figure 4, the column 1 is made of reinforced concrete like the first embodiment, while the beam 21 is made of steel (S). The beam joint 20 of the column 1 has an RC-column S-beam structure, called a beam-through type, in which the beam 21 penetrates the column 1. In the beam joint 20 of the column 1, the beam 21 crosses in a cross shape. The column main reinforcement 7 of the column 1 is arranged at the four corners of the column 1 divided by the beam 21. Four cover plates 22, which are integrated with the beam 21 by welding, are arranged around the outer periphery of the beam joint 20 of the column 1 in a ring shape to surround the column 1.

図5は図4に示す柱1の断面図である。図5に示すように、本実施形態では、中間主筋7Bは1対の隅主筋7Aの間の隅主筋7Aに近い位置に2本ずつ配置され、合計で8本の中間主筋7Bが設けられている。すなわち、梁21によって区分された柱1の4隅のそれぞれに、1本の隅主筋7Aと2本の中間主筋7Bとが配置されている。 Figure 5 is a cross-sectional view of the column 1 shown in Figure 4. As shown in Figure 5, in this embodiment, two intermediate main reinforcements 7B are placed between a pair of corner main reinforcements 7A at positions close to the corner main reinforcements 7A, for a total of eight intermediate main reinforcements 7B. In other words, one corner main reinforcement 7A and two intermediate main reinforcements 7B are placed at each of the four corners of the column 1 divided by the beams 21.

外殻PCa部材片4や外殻PCa部材2がこのように構成されていても、第1実施形態と同様の効果が奏される。 Even if the outer shell PCa member piece 4 and the outer shell PCa member 2 are configured in this manner, the same effects as in the first embodiment are achieved.

≪第3実施形態≫
次に、図6を参照して本発明の第3実施形態について説明する。図6(A)に示すように、本実施形態では、外殻PCa部材片4が、第1実施形態と同様の3本の中間主筋7B及び帯筋9に加え、フック付き鉄筋31をPCa部5に一体に備えている。フック付き鉄筋31は、4つの外殻PCa部材片4について、柱1の長手方向の同じ位置に設けられる。フック付き鉄筋31は、帯筋9と同じ間隔で設けられる必要はなく、より大きな間隔で設けられてよい。
Third Embodiment
Next, a third embodiment of the present invention will be described with reference to Fig. 6. As shown in Fig. 6(A), in this embodiment, the shell PCa component pieces 4 are provided with hooked reinforcing bars 31 integrally in the PCa section 5 in addition to the three intermediate main bars 7B and the tie bars 9 similar to those in the first embodiment. The hooked reinforcing bars 31 are provided at the same position in the longitudinal direction of the column 1 for the four shell PCa component pieces 4. The hooked reinforcing bars 31 do not need to be provided at the same intervals as the tie bars 9, and may be provided at larger intervals.

フック付き鉄筋31は、中央に配置された中間主筋7Bに係合する外フック32を外端に備え、内端に内フック33を備えている。外フック32及び内フック33はそれぞれ、折り曲げ角度が180°である180°フックとされている。外フック32の大部分はPCa部5に埋設されている。フック付き鉄筋31は、外フック32から柱1の内方に向けて延出し、PCa部5の内面14に直交している。 The hooked reinforcing bar 31 has an outer hook 32 at its outer end that engages with the centrally located intermediate main reinforcing bar 7B, and an inner hook 33 at its inner end. The outer hook 32 and the inner hook 33 are each 180° hooks with a bending angle of 180°. Most of the outer hook 32 is embedded in the PCa section 5. The hooked reinforcing bar 31 extends from the outer hook 32 toward the inside of the column 1 and is perpendicular to the inner surface 14 of the PCa section 5.

図6(B)に示すように、4つの外殻PCa部材片4を四角形状に配置すると、4本のフック付き鉄筋31の内フック33は互いに重なり、柱1の中心に円形の空間を形成する。図6(C)に示すように、この空間には芯筋34が配置される。すなわち、芯筋34が所定位置に配置されることにより、4本のフック付き鉄筋31の内フック33が芯筋34に係合する。 As shown in Figure 6 (B), when the four outer shell PCa component pieces 4 are arranged in a square shape, the inner hooks 33 of the four hooked rebars 31 overlap each other, forming a circular space in the center of the column 1. As shown in Figure 6 (C), the core bar 34 is placed in this space. In other words, by placing the core bar 34 in a predetermined position, the inner hooks 33 of the four hooked rebars 31 engage with the core bar 34.

このように外殻PCa部材片4が、柱筋6が柱1の中心に配置される芯筋34に係合する内フック33を有するフック付き鉄筋31を更に備えることにより、各外殻PCa部材片4がフック付き鉄筋31によって拘束される。そのため、外殻PCa部材2を四角形に維持することが容易である。 In this way, the outer shell PCa member pieces 4 further include hooked reinforcing bars 31 having inner hooks 33 that engage with the core reinforcing bars 34 that are positioned at the center of the column 1, so that each outer shell PCa member piece 4 is restrained by the hooked reinforcing bars 31. This makes it easy to maintain the outer shell PCa member 2 in a rectangular shape.

≪第4実施形態≫
次に、図7を参照して本発明の第4実施形態について説明する。図7(A)に示すように、本実施形態では、各フック付き鉄筋31の内フック33が、折り曲げ角度が90°である90°フックとされている。内フック33がこのように構成されることにより、芯筋34が柱1の中心に予め配置されていても、図7(B)に示すように、4つの外殻PCa部材片4を所定位置に配置して四角形の中空断面の外殻PCa部材2を形成することができる。
Fourth Embodiment
Next, a fourth embodiment of the present invention will be described with reference to Fig. 7. As shown in Fig. 7(A), in this embodiment, the inner hook 33 of each hooked reinforcing bar 31 is a 90° hook with a bending angle of 90°. By configuring the inner hook 33 in this manner, even if the core bar 34 is previously arranged at the center of the column 1, as shown in Fig. 7(B), four outer shell PCa member pieces 4 can be arranged in predetermined positions to form an outer shell PCa member 2 with a rectangular hollow cross section.

本実施形態においても、外殻PCa部材片4のそれぞれが、関連する中間主筋7Bに係合する外フック32及び柱1の中心に配置される芯筋34に係合する内フック33を有するフック付き鉄筋31を更に含んでいる。そのため、各外殻PCa部材片4がフック付き鉄筋31によって拘束され、外殻PCa部材2の形状維持が容易である点は第3実施形態と同様である。 In this embodiment, each of the outer shell PCa member pieces 4 also includes a hooked reinforcing bar 31 having an outer hook 32 that engages with the associated intermediate main reinforcement 7B and an inner hook 33 that engages with the core reinforcement 34 located at the center of the column 1. Therefore, each outer shell PCa member piece 4 is restrained by the hooked reinforcing bar 31, and the shape of the outer shell PCa member 2 can be easily maintained, just like in the third embodiment.

≪第5実施形態≫
次に、図8を参照して本発明の第5実施形態について説明する。図8(A)に示すように、本実施形態では、外殻PCa部材片4が、第1実施形態と同様の3本の中間主筋7B及び帯筋9に加え、中子筋片41をPCa部5に一体に備えている。柱1は、図示例では四角形断面を有しているが、偶数の辺からなる偶数角形断面を有していればよい。中子筋片41は、対向配置される2つの外殻PCa部材片4について、柱1の長手方向の同じ位置に設けられる。図8には、2つの外殻PCa部材片4のみについて中子筋片41が示されているが、残りの2つの外殻PCa部材片4についても、これらとは柱1の長手方向について異なる位置であって、互いに柱1の長手方向の同じ位置に中子筋片41が設けられる。中子筋片41は、帯筋9と同じ間隔で設けられる必要はなく、より大きな間隔で設けられてよい。
Fifth embodiment
Next, a fifth embodiment of the present invention will be described with reference to FIG. 8. As shown in FIG. 8(A), in this embodiment, the shell PCa member 4 has a core bar 41 integrally formed in the PCa portion 5 in addition to the three intermediate main bars 7B and the tie bars 9 as in the first embodiment. In the illustrated example, the column 1 has a rectangular cross section, but it may have an even polygonal cross section with an even number of sides. The core bar 41 is provided at the same position in the longitudinal direction of the column 1 for the two shell PCa member pieces 4 arranged opposite to each other. In FIG. 8, the core bar 41 is shown for only two shell PCa member pieces 4, but the core bar 41 is provided for the remaining two shell PCa member pieces 4 at different positions in the longitudinal direction of the column 1 from these pieces, but at the same position in the longitudinal direction of the column 1. The core bar 41 does not need to be provided at the same interval as the tie bars 9, and may be provided at a larger interval.

中子筋片41は、中央に配置された中間主筋7Bに係合する外側フック42を外端に備え、内端に内側フック43を備えている。外側フック42及び内側フック43はそれぞれ、折り曲げ角度が180°である180°フックとされている。外側フック42の大部分はPCa部5に埋設されている。中子筋片41は、外側フック42から柱1の内方に向けて延出し、PCa部5の内面14に直交している。 The core reinforcement piece 41 has an outer hook 42 at its outer end that engages with the centrally located intermediate main reinforcement 7B, and an inner hook 43 at its inner end. The outer hook 42 and the inner hook 43 are each 180° hooks with a bending angle of 180°. Most of the outer hook 42 is embedded in the PCa section 5. The core reinforcement piece 41 extends from the outer hook 42 toward the inside of the column 1 and is perpendicular to the inner surface 14 of the PCa section 5.

図8(B)に示すように、4つの外殻PCa部材片4を四角形状に配置すると、2本の中子筋片41の内側部分は互いに重なる。本実施形態では、2本の中子筋片41は内側部分において重ね継手を構成し、外殻PCa部材2の中空部に現場打ちコンクリートが打設されることで互いに継ぎ合わされ、せん断補強筋として機能する1本の中子筋44となる。 As shown in FIG. 8(B), when the four shell PCa member pieces 4 are arranged in a square shape, the inner portions of the two core reinforcement pieces 41 overlap each other. In this embodiment, the two core reinforcement pieces 41 form a lap joint at the inner portions, and are joined together by pouring in-situ concrete into the hollow portion of the shell PCa member 2, forming a single core reinforcement 44 that functions as a shear reinforcement.

このように対向配置される1対の外殻PCa部材片4は、関連する中間主筋7Bに係合する外側フック42を有し、内側部分にて互いに継ぎ合わされる中子筋片41を更に備えることにより、中子筋片41によって連結される。したがって、4つの外殻PCa部材片4によって構成される外殻PCa部材2の形状が維持される。 A pair of outer shell PCa member pieces 4 arranged opposite each other in this manner have outer hooks 42 that engage with the associated intermediate main reinforcement 7B, and are further provided with core reinforcement pieces 41 that are joined to each other at the inner portions, and are connected by the core reinforcement pieces 41. Therefore, the shape of the outer shell PCa member 2 formed by the four outer shell PCa member pieces 4 is maintained.

≪第6実施形態≫
次に、図9を参照して本発明の第6実施形態について説明する。本実施形態では、図9(A)に示すように、対向配置される1対の外殻PCa部材片4に設けられた中子筋片41が、内側部分において溶接によって互いに継ぎ合わされる。柱1の長手方向の異なる位置に配置される図示されない1対の中子筋片41は、第5実施形態と同様に内側フック43を有し、重ね継手を構成する。
Sixth Embodiment
Next, a sixth embodiment of the present invention will be described with reference to Fig. 9. In this embodiment, as shown in Fig. 9(A), core reinforcing pieces 41 provided on a pair of outer shell PCa member pieces 4 arranged opposite each other are joined to each other by welding at their inner portions. A pair of core reinforcing pieces 41 (not shown) arranged at different positions in the longitudinal direction of the column 1 have inner hooks 43 as in the fifth embodiment, and form a lap joint.

四角形断面の外殻PCa部材2を構築する際には、図9(A)に示すように、3つの外殻PCa部材片4を所定位置に配置してU字形にした状態で、1対の中子筋片41の内側部分を溶接により継ぎ合わせる。その後、図9(B)に示すように、残りの1つの外殻PCa部材片4を所定位置に配置して、四角形断面の外殻PCa部材2を構築する。 When constructing the outer shell PCa member 2 with a rectangular cross section, as shown in FIG. 9(A), three outer shell PCa member pieces 4 are placed in predetermined positions to form a U-shape, and the inner portions of a pair of core bar pieces 41 are joined by welding. Then, as shown in FIG. 9(B), the remaining outer shell PCa member piece 4 is placed in a predetermined position to construct the outer shell PCa member 2 with a rectangular cross section.

中子筋片41がこのように構成されても、2本の中子筋片41が内側部分において互いに継ぎ合わされることで、せん断補強筋として機能する1本の中子筋44となる。 Even if the core bar 41 is constructed in this manner, two core bar pieces 41 are joined together at the inner portion to form a single core bar 44 that functions as a shear reinforcement.

≪第7実施形態≫
次に、図10を参照して本発明の第7実施形態について説明する。本実施形態では、対角に位置する2本の隅主筋7Aを連結する補強筋51が外殻PCa部材2の中空部に設けられている。本実施形態では、柱1の断面が四角形であるため、4本の隅主筋7Aに対して2本の補強筋51が設けられている。柱1の断面が六角形の場合には3本の補強筋51が設けられ、柱1の断面が八角形の場合には4本の補強筋51が設けられる。各補強筋51は両端にフック52を有し、対応する2本の隅主筋7Aにフック52が係合するように配置される。補強筋51は、外殻PCa部材2の中空部に現場打ちコンクリートが打設されることで柱1の現場打ち部3に埋設される。
Seventh embodiment
Next, a seventh embodiment of the present invention will be described with reference to Fig. 10. In this embodiment, a reinforcing bar 51 that connects two diagonally positioned corner main bars 7A is provided in the hollow portion of the outer shell PCa member 2. In this embodiment, since the cross section of the column 1 is rectangular, two reinforcing bars 51 are provided for four corner main bars 7A. When the cross section of the column 1 is hexagonal, three reinforcing bars 51 are provided, and when the cross section of the column 1 is octagonal, four reinforcing bars 51 are provided. Each reinforcing bar 51 has hooks 52 at both ends, and is arranged so that the hooks 52 engage with the corresponding two corner main bars 7A. The reinforcing bars 51 are embedded in the cast-in-place portion 3 of the column 1 by pouring cast-in-place concrete into the hollow portion of the outer shell PCa member 2.

≪第8実施形態≫
次に、図11を参照して本発明の第8実施形態について説明する。本実施形態では、各外殻PCa部材片4のPCa部5の内面14に凹凸61が設けられている。このように凹凸61が設けられることにより、外殻PCa部材片4と現場打ち部3との一体性が向上する。
Eighth embodiment
Next, an eighth embodiment of the present invention will be described with reference to Fig. 11. In this embodiment, unevenness 61 is provided on the inner surface 14 of the PCa portion 5 of each outer PCa shell piece 4. By providing the unevenness 61 in this manner, the integrity between the outer PCa shell piece 4 and the cast-in-place portion 3 is improved.

≪第9実施形態≫
次に、図12を参照して本発明の第9実施形態について説明する。本実施形態では、中間主筋7BがPCa部5の内側に配置され、外殻PCa部材片4に一体とされていない。すなわち、外殻PCa部材片4のPCa部5に一体に設けられる柱筋6は、帯筋9を含む一方、柱主筋7を含んでいない。PCa部5に一体に設けられる柱筋6は、複数の帯筋9の相対位置を定めるために図示しない組立鉄筋を含むとよい。
Ninth embodiment
Next, a ninth embodiment of the present invention will be described with reference to Fig. 12. In this embodiment, intermediate main reinforcement 7B is disposed inside the PCa portion 5 and is not integrated with the outer shell PCa component piece 4. That is, the column reinforcement 6 integrally provided with the PCa portion 5 of the outer shell PCa component piece 4 includes the hoop reinforcement 9, but does not include the column main reinforcement 7. The column reinforcement 6 integrally provided with the PCa portion 5 may include an assembly rebar (not shown) to determine the relative positions of the multiple hoop reinforcement 9.

図示例では、帯筋主部10がPCa部5の内面14に露出しておらず、中間主筋7BがPCa部5の内面14に沿って配置されている。そのため、中間主筋7Bは両側に位置する2本の隅主筋7Aに対して柱1の内側にオフセットしている。中間主筋7Bは、4つの外殻PCa部材片4の配置前に配置されてもよく、4つの外殻PCa部材片4の配置後に配置されてもよい。或いは、1つ~3つの外殻PCa部材片4の配置後に中間主筋7Bが配置されてもよい。 In the illustrated example, the hoop main reinforcement 10 is not exposed on the inner surface 14 of the PCa section 5, and the intermediate main reinforcement 7B is arranged along the inner surface 14 of the PCa section 5. Therefore, the intermediate main reinforcement 7B is offset toward the inside of the column 1 relative to the two corner main reinforcements 7A located on both sides. The intermediate main reinforcement 7B may be arranged before the arrangement of the four outer shell PCa component pieces 4, or after the arrangement of the four outer shell PCa component pieces 4. Alternatively, the intermediate main reinforcement 7B may be arranged after the arrangement of one to three outer shell PCa component pieces 4.

このように柱筋6が中間主筋7Bを含まないことにより、外殻PCa部材片4をより薄く形成でき、外殻PCa部材片4の更なる軽量化が可能である。 In this way, because the column reinforcement 6 does not include intermediate main reinforcement 7B, the outer shell PCa component piece 4 can be made thinner, making it possible to further reduce the weight of the outer shell PCa component piece 4.

以上で具体的実施形態の説明を終えるが、本発明は上記実施形態に限定されることなく幅広く変形実施することができる。例えば、各部材や部位の具体的構成や配置、数量、角度など、本発明の趣旨を逸脱しない範囲であれば適宜変更可能である。一方、上記実施形態に示した各構成要素は必ずしもすべてが必須ではなく、適宜選択することができる。 Although the description of the specific embodiment is now complete, the present invention is not limited to the above embodiment and can be modified in a wide range of ways. For example, the specific configuration, arrangement, quantity, and angle of each member or part can be changed as appropriate without departing from the spirit of the present invention. On the other hand, not all of the components shown in the above embodiment are necessarily required and can be selected as appropriate.

1 柱
1a 外周面
2 外殻PCa部材
3 現場打ち部
4 外殻PCa部材片
5 PCa部
6 柱筋
7 主筋
7A 隅主筋
7B 中間主筋
8 環状帯筋
9 帯筋
10 帯筋主部
11 フック
13 外面
14 内面
15 傾斜側面
16 外側面部
17 延長線
18 内側面部
31 フック付き鉄筋
32 外フック
33 内フック
34 芯筋
41 中子筋片
42 外側フック
θ 頂点の内角
G 空隙
1 Column 1a Outer surface 2 Outer shell PCa member 3 Cast-in-place portion 4 Outer shell PCa member piece 5 PCa portion 6 Column reinforcement 7 Main reinforcement 7A Corner main reinforcement 7B Intermediate main reinforcement 8 Annular tie 9 Tie 10 Tie reinforcement main portion 11 Hook 13 Outer surface 14 Inner surface 15 Sloping side surface 16 Outer surface portion 17 Extension line 18 Inner surface portion 31 Reinforcing bar with hook 32 Outer hook 33 Inner hook 34 Core reinforcement 41 Core reinforcement piece 42 Outer hook θ Inner angle G of apex

Claims (5)

多角形断面を有する柱の外殻部の一部をなす外殻PCa部材片であって、
前記柱の外周面に沿って配置される平板状のPCa部と、
前記PCa部に一体に設けられ、少なくとも帯筋を含む柱筋とを備え、
前記PCa部は、断面において、前記柱の前記外周面の1辺の全体のみをなす外面と、前記外面と略平行に延在する内面と、前記外面と前記内面とを接続し、前記柱の主筋のうち前記柱の隅部に配置される隅主筋を当該PCa部に埋設させないように、前記外面に対して90°よりも小さい傾斜角度をもって傾斜する1対の傾斜側面とを有し、
前記帯筋が、前記PCa部から延出する両端を有する直線状の帯筋主部と、前記帯筋主部の前記両端から前記柱の内方へ折り曲げられ、前記隅主筋に係合する1対のフックとを備えることを特徴とする外殻PCa部材片。
An outer shell PCa member piece forming a part of the outer shell of a column having a polygonal cross section,
A flat PCa portion arranged along the outer peripheral surface of the column;
The PCa portion is integrally provided with a column reinforcement including at least a hoop reinforcement,
The PCa portion has, in a cross section, an outer surface that constitutes only one entire side of the outer peripheral surface of the column, an inner surface that extends approximately parallel to the outer surface, and a pair of inclined side surfaces that connect the outer surface and the inner surface and are inclined at an inclination angle of less than 90° with respect to the outer surface so as not to embed corner main reinforcements of the main reinforcements of the column at the corners of the column in the PCa portion ;
The outer shell PCa component piece is characterized in that the tie reinforcement comprises a straight-line main tie reinforcement portion having both ends extending from the PCa portion, and a pair of hooks bent from both ends of the main tie reinforcement portion toward the inside of the column and engaging with the corner main reinforcement.
前記傾斜側面のそれぞれが、前記外面から連続し、前記多角形断面の対応する頂点の内角の半分の角度をもって前記外面に対して傾斜する外側面部と、前記外側面部から連続し、前記外側面部の延長線に対して凹陥する内側面部とを有することを特徴とする請求項1に記載の外殻PCa部材片。 The outer shell PCa member piece according to claim 1, characterized in that each of the inclined side surfaces has an outer surface portion that is continuous with the outer surface and inclined with respect to the outer surface at an angle that is half the interior angle of the corresponding vertex of the polygonal cross section, and an inner surface portion that is continuous with the outer surface portion and is recessed with respect to an extension line of the outer surface portion. 多角形断面を有する柱の外殻部をなす外殻PCa部材であって、
前記柱の断面において周方向に分割された複数の外殻PCa部材片を含み、
前記外殻PCa部材片のそれぞれが、前記柱の外周面に沿って配置される平板状のPCa部と、前記PCa部に一体に設けられ、少なくとも帯筋を含む柱筋とを備え、
前記PCa部は、断面において、前記柱の前記外周面の1辺の全体のみをなす外面と、前記外面と略平行に延在する内面と、前記外面と前記内面とを接続し、前記柱の主筋のうち前記柱の隅部に配置される隅主筋を当該PCa部に埋設させないように、前記外面に対して90°よりも小さい傾斜角度をもって傾斜する1対の傾斜側面とを有し、
前記帯筋が、前記PCa部から延出する両端を有する直線状の帯筋主部と、前記帯筋主部の前記両端から前記柱の内方へ折り曲げられ、前記隅主筋に係合する1対のフックとを備え、
隣接配置される1対の前記外殻PCa部材片の互いに隣接する前記傾斜側面の間に、前記隅主筋を配置するための空隙が形成されることを特徴とする外殻PCa部材。
An outer shell PCa member forming an outer shell part of a column having a polygonal cross section,
The column includes a plurality of outer shell PCa member pieces divided in the circumferential direction in a cross section thereof,
Each of the outer shell PCa member pieces includes a flat PCa portion arranged along the outer peripheral surface of the column, and a column reinforcement including at least a hoop reinforcement integrally formed with the PCa portion;
The PCa portion has, in a cross section, an outer surface that constitutes only one entire side of the outer peripheral surface of the column, an inner surface that extends approximately parallel to the outer surface, and a pair of inclined side surfaces that connect the outer surface and the inner surface and are inclined at an inclination angle of less than 90° with respect to the outer surface so as not to embed corner main reinforcements of the main reinforcements of the column at the corners of the column in the PCa portion ;
The tie bar includes a straight tie bar main part having both ends extending from the PCa part, and a pair of hooks bent from both ends of the tie bar main part toward the inside of the column and engaging with the corner main bar,
An outer shell PCa member, characterized in that a gap for placing the corner main reinforcement is formed between the adjacent inclined side surfaces of a pair of adjacently arranged outer shell PCa member pieces.
前記外殻PCa部材片の前記柱筋が、前記主筋のうち前記隅部以外の部分に配置される中間主筋を含み、
前記外殻PCa部材片のそれぞれが、関連する前記中間主筋に係合する外フック及び前記柱の中心に配置される芯筋に係合する内フックを有するフック付き鉄筋を更に含むことを特徴とする請求項3に記載の外殻PCa部材。
The column reinforcement of the outer shell PCa member piece includes an intermediate main reinforcement arranged in a portion other than the corner portion among the main reinforcements,
The shell PCa member according to claim 3, characterized in that each of the shell PCa member pieces further includes a hooked reinforcing bar having an outer hook that engages with the associated intermediate main reinforcing bar and an inner hook that engages with a core reinforcing bar located at the center of the column.
前記柱が偶数の辺からなる偶数角形断面を有し、
前記外殻PCa部材片の前記柱筋が、前記主筋のうち前記隅部以外の部分に配置される中間主筋を含み、
互いに対向して配置される1対の前記外殻PCa部材片のそれぞれが、関連する前記中間主筋に係合する外側フックを有し、内側部分にて互いに継ぎ合わされる中子筋片を更に含むことを特徴とする請求項3又は請求項4に記載の外殻PCa部材。
The pillar has an even-sided polygonal cross section with an even number of sides,
The column reinforcement of the outer shell PCa member piece includes an intermediate main reinforcement arranged in a portion other than the corner portion among the main reinforcements,
The shell PCa member according to claim 3 or claim 4, characterized in that each of the pair of shell PCa member pieces arranged opposite each other has an outer hook that engages with the associated intermediate main reinforcement and further includes core reinforcement pieces that are joined to each other at their inner portions.
JP2020154121A 2020-09-14 2020-09-14 Outer shell PCa member piece of column and outer shell PCa member of column Active JP7483569B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2020154121A JP7483569B2 (en) 2020-09-14 2020-09-14 Outer shell PCa member piece of column and outer shell PCa member of column

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2020154121A JP7483569B2 (en) 2020-09-14 2020-09-14 Outer shell PCa member piece of column and outer shell PCa member of column

Publications (2)

Publication Number Publication Date
JP2022048018A JP2022048018A (en) 2022-03-25
JP7483569B2 true JP7483569B2 (en) 2024-05-15

Family

ID=80781326

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2020154121A Active JP7483569B2 (en) 2020-09-14 2020-09-14 Outer shell PCa member piece of column and outer shell PCa member of column

Country Status (1)

Country Link
JP (1) JP7483569B2 (en)

Also Published As

Publication number Publication date
JP2022048018A (en) 2022-03-25

Similar Documents

Publication Publication Date Title
KR100652896B1 (en) Connection system with headed reinforcements for precast concrete beam-column joint
JP5819679B2 (en) Slab construction method, shear reinforcement, and concrete beam structure
JP6567965B2 (en) Joint structure of PCa slab and its construction method
JP7483569B2 (en) Outer shell PCa member piece of column and outer shell PCa member of column
US20060185310A1 (en) Arrangement of truss cords
JP4802111B2 (en) Long structure and steel rebar members
JP6636345B2 (en) RC building and construction method of RC building
WO2015146907A1 (en) Beam member and framework employing same
JP2020063617A (en) Joint structure of precast concrete members
JP6590571B2 (en) Precast concrete beam end joint structure and precast concrete beam column frame
JP7157092B2 (en) Construction method of precast concrete structure
JP6402060B2 (en) Foundation structure and construction method of foundation structure
JP6041144B2 (en) Top floor joint structure
JP2002227295A (en) Thin outer shell-like structure precast beam and beam constructing method
JP3131259U (en) Frame structure of a column structure using helical muscles
JP2008223242A (en) Manufacturing method for precast concrete panel
JPS58199957A (en) Composite reinforced concrete structure
JPH07217069A (en) Construction method of reinforced concrete pole and constituting precast concrete member thereof
JP6712448B2 (en) Precast members for reinforced concrete beam-column joints
JP3811852B2 (en) Column and beam joint structure
JP2772624B2 (en) RC floor slab reinforcement structure
JP6879634B2 (en) Joining structure and joining method of precast beam members
KR200390306Y1 (en) Jig for Steel reinforcing construction
JP4235596B2 (en) Rebar
JP3579333B2 (en) Floor slab structure and construction method of floor slab

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20230414

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20240130

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20240206

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20240401

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20240423

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20240501

R150 Certificate of patent or registration of utility model

Ref document number: 7483569

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150