JPH05222770A - Building body coupled with column body and joint constituent body and construction thereof - Google Patents

Abstract

PURPOSE:To transmit axial force acting on a column body surely to concrete in a column steel frame and disperse moment acting on a joint part accurately dispersible to the column steel frame, respectively. CONSTITUTION:A column body 20 is erected in a column forming position of a lower body, while the upper part of a connecting rod 23 embedded in a concrete part 22 of the column body 20 is pierced through a through hole 14c of a concrete part 14 of a joint constituent body 10, mounting this body 10 on the column body 20, and axial compression force is made so as not to act on a column steel frame 21 of the column lay 20 and another steel frame 11 of the joint constituent body 10. In succession, an upper end of the connecting steel rod 23 is tensed and thereby tensile force is induced, holding this tensile force with a proper holding means (n), and an upper end of the column steel frame 21 is welded to a lower end of the column steel frame 11. Therefore, the joint constituent body and the column body can be unitized, whereby high- degree skillfulness is not required at all even in assembly and so on. Even if a large axial force acts on a building after completion, there is no fear of a steel column being buckled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a building structure in which a pillar and a joint structure are combined, and more particularly, a building structure in which a concrete-filled and unitized pillar and a structure are combined. And its construction method.

[0002]

[Prior Art]

(1) Manufacture precast reinforced concrete columns,
Produce a beam of precast reinforced concrete, build multiple columns in place, put the end of the beam on the top of each column,
The beam is hung between the upper ends of the columns, the reinforcing bars at the upper ends of the columns and the reinforcing bars at the ends of the beams are placed in a predetermined positional relationship, and the columns and the reinforcing bars at the ends of the beams are surrounded by a formwork, (2) A pair of pillars and a beam connecting them are integrally made by a precast reinforced concrete structure to produce a pillar-beam body, and a precast reinforced concrete structure is also used. A single girder is manufactured with, the pillar-beam body is built in a predetermined position, the single-beam is arranged in a portion where there is no beam between the pillar-beam body and the pillar-beam body, and the single-beam is connected by an appropriate connecting means. (3) As shown in FIG. 21 and FIG. 22, a short H-shaped steel frame 2a of the same construction as a steel beam is crossed in a cross shape and integrally joined to form a cross steel frame 2A. Then, an L-shaped formwork / plate 2b is arranged around the center of the cross steel frame 2A. The edge portions of the form / combination plates 2b are respectively welded to the H-shaped steel frame 2a, and the four form / combination plates 2b form a rectangular form / combination cylinder 2B. The portion of the short H-shaped steel 2a located on the outer side is used as the beam attachment portion 2a1 to form the joint structure 2, and the plurality of column main bars 1a, 1a1 of the reinforced concrete column 1 are used as the frame for the joint structure 2 as well. A plurality of column main bars 1a are passed through the inside of the body 2B and through the vertical holes formed in the flange of the H-shaped steel frame 2a.
Fixing a plurality of the 1a1 among them to the formwork-cum-cylindrical body 2B, and surrounding the column main bars 1a, 1a1 and the stirrups 1b with the formwork,
Concrete is placed in the formwork and cylinder 2B and in the formwork to form the pillar 1 and the joint portion, and the joint structure 2 is embedded in the concrete portion of the joint portion of the pillar 1, A steel frame beam is attached to the beam attachment portion 2a1 of the short H-shaped steel of the mouth structure 2, (4) As shown in FIGS. 23 and 24, the flange of the short H-shaped steel frame 3a is formed into a triangular horizontal shape. The stiffener 3a1 is cut off and the steel frame 3a is crossed to form a crossed steel frame 3A. The crossed steel frame 3A is formed around the crossed steel frame 3A. The end portion of each steel frame 3a of the steel frame 3A is welded to the formwork-cum-cylindrical body 3B, and the beam mounting body 3C is welded to the outside of the formwork-cum-cylindrical body 3B to form the joint structure body 3 of the reinforced concrete column 1. The plurality of pillar main bars 1a are passed through the inside of the formwork / cylindrical body 3B of the joint structure 3 to form the pillar main bars 1a. And surrounding the stirrup 1b with a formwork, and concrete is placed in the formwork-cum-cylindrical body 3B and in the formwork to form the column 1 and the joint portion, and the column main line 1a is passed through. There is a method in which the mouth structure 3 is embedded in the concrete portion of the connection part of the pillar 1 and the steel frame beam 4 is attached to the beam attachment body 3C of the connection structure 3.

[0003]

The problem (1) is that
For advanced work such as extending the beam between the upper ends of the columns so that the reinforcing bars at the upper ends of the columns and the reinforcing bars at the ends of the beams have a predetermined positional relationship and surrounding the reinforcing bars at the joint with a formwork. With the drawback of requiring skill, the above (2) makes it easy to enclose the periphery of the reinforcing bar of the joint part with a formwork, but the precast reinforced concrete column beam becomes very heavy, and There are drawbacks that it takes time to lift and requires heavy equipment. Further, in (3) and (4), since the portions of the cross steel frames 2A, 3A made of the steel frames 2a, 3a of the joint structure bodies 2, 3 are embedded in the concrete portion of the joint portion,
The vertical force acting on the joint structures 2, 3 can be successfully transmitted to the reinforced concrete columns 1, but the upper and lower columns 1 of the joint structures 2, 3 are made of reinforced concrete, so the joint structures 2, 3 The moment acting on the column 1 cannot be successfully transmitted to the column 1, and an unreasonable force acts on the joint portion between the joint structure bodies 2 and 3 and the reinforced concrete column 1 and this portion may be damaged. The problem to be solved by the present invention is to provide a building structure in which a column body and a joint structure are combined, and a construction method thereof, which does not have the drawbacks of the above (1) to (4). In other words, the axial force acting on the pillar can be reliably transmitted to the concrete in the pillar steel frame, the moment acting on the joint part can be accurately distributed to the pillar steel frame, and the joint structure and pillar body can be unitized. The purpose of the present invention is to provide a building skeleton and a construction method thereof that can be easily transported and lifted, and construction work at the site does not require a high degree of skill.

[0004]

The present invention adopts the following construction in order to solve the above-mentioned problems. The configuration of the present invention, the column is composed of a long column steel frame of a closed type cross section, a concrete portion that fills the long column steel frame, and a connecting steel rod that is embedded vertically extending in the concrete portion, The column structure has a short column steel frame with a closed cross section,
A beam attachment body welded to the outside of the short column steel frame, a stiffener or cotter welded to the inside of the short column steel frame, a concrete portion filling the inside of the short column steel frame, and a concrete portion filling the inside of the short column steel frame A plurality of through-holes extending in the up-down direction formed therein, the pillars are respectively built at a plurality of pillar-forming positions of the lower body, and the joint structure is mounted on each pillar. , The portion of the pillar projecting upward of the connecting steel rod is respectively passed through the through holes of the concrete portion of the joint structure, a tensile force is introduced into the connecting steel rod, the tensile force introduced into the connecting steel rod The end face of the concrete part of the joint structure and the end face of the concrete part of the column body are pressed against each other by holding them with appropriate holding means, and the end of the beam steel frame is fixed to the beam mounting body of the joint structure. And the connection structure In building precursor which combines the columnar body and the Joint structure, characterized in that the upper end of the lower and long pillar steel pillars of short pillars steel are welded together. In the present invention, the pillar body and the connection forming body are unitized and manufactured in a factory. The joint structure, in a preferred embodiment, fixes the beam mounting body to the outside of the short column steel frame of the closed mold cross section, and fixes the stiffener to the inside of the short column steel frame in correspondence with the beam mounting body, and Filling the inside of the short column steel frame with a closed-type cross section with concrete, forming a recess or protrusion in the center of the upper part of the concrete within the short column steel frame, and projecting or recessing in the center of the bottom part of the concrete portion within the short column steel frame And a through hole extending in the vertical direction is formed in the concrete portion in the pillar steel frame. As the stiffener, a horizontal stiffener, a vertical stiffener, or a horizontal stiffener and a vertical stiffener are provided. As the cotter, a structure capable of transmitting an axial force acting on a pillar-shaped steel frame having a closed cross section to a concrete portion in the pillar-shaped steel frame is employed, and the cotter is protruded from the inner peripheral surface of the short column-shaped steel frame by welding or the like. As the beam attachment body of the joint structure, for example, an H-shaped steel beam, which is the same as the steel beam, is cut into short pieces, or a gusset made of a steel plate having a width narrower than that of the steel beam is used.

In a preferred embodiment, the pillar body is filled with concrete in a long pillar steel frame having a closed cross section, and a concave portion or a convex portion is formed in the center of the upper portion of the concrete,
Forming a convex portion or a concave portion in the center of the lower part of the concrete in the long column steel frame, burying a vertically connecting connecting steel rod in the concrete in the column steel frame, the upper portion of the connecting steel rod from the upper end of the column body It is formed by projecting upward for a long time. As the connecting steel rod, for example, a PC steel rod is used. It is also possible to cover the upper portion of the connecting steel rod embedded in the concrete in the pillar steel frame with a sheath so that only the lower portion of the connecting steel rod is joined to the concrete. In addition, a connecting sleeve is fitted to the lower end of the connecting steel rod and embedded in concrete, and the connecting steel rod protruding from the upper part of the lower body is fitted to the connecting sleeve embedded in the lower part of the column body to form the connecting sleeve. It may be used to connect the lower end of the column to the lower body. In addition, fix the fixing metal fittings to the lower end of the connecting steel rods so that the fixing metal fittings at the lower end of the connecting steel rods are located in the middle of the concrete part in the long pillar steel frame, and the lower part of the connecting steel rods is It is also possible to shorten the fixing length (length of the embedded portion) of the connecting steel rod to the concrete portion by embedding it in the. As the shape of the closed cross section of the long pillar steel frame and the short pillar steel frame, an octagon, a quadrangle, a circle, or the like is used. If you want to use a square or circle as the shape of the closed section,
Long column steel frames and short column steel frames are formed by cutting ready-made square steel pipes or steel pipes to a predetermined length. Since the column steel frame that constitutes a part of the joint structure is short, even if it is constructed by cutting off a prefabricated square steel pipe or steel pipe, the stiffener, cotter, etc. can be easily fixed to the inside of the short column steel frame by welding. it can.

The present invention is also characterized as a method for constructing a building structure. That is, the structure of the present invention is to fill a long column steel frame with a closed type cross section with concrete to form a column body by vertically embedding a connecting steel rod in a concrete portion of the long column type steel frame, and to provide a short closed type cross section. Weld a beam attachment to the outside of the column steel frame, weld a stiffener or cotter to the inside, fill the inside of the short column steel frame with concrete, and make multiple through holes in the vertical direction in the concrete portion inside the short column steel frame. To form a joint structure, the pillars are respectively built at a plurality of pillar forming positions of the lower body, and the portions protruding above the plurality of connecting steel rods of the pillar are the concrete parts of the joint structure. Through the through hole, each of the joint structure is placed on each column, pulling the upper end of the connecting steel rod to introduce a tensile force into the connecting steel rod, and appropriately introducing the tensile force introduced into the connecting steel rod. Hold by the holding means of The end face of the concrete part of the adult body and the end face of the concrete part of the column body are pressed against each other, and the lower end of the short column steel frame of the joint structure and the upper end of the long column steel frame of the column body are joined by welding. It is in the method of constructing a building structure that connects a pillar and a joint structure. The tensile force may be introduced into the connecting steel rod before the temporary attachment of the beam steel frame to the beam attachment body of the joint structure, or after the temporary attachment of the beam steel frame to the beam attachment body. Introducing a tensile force to the connecting steel rods and holding the tensile force by an appropriate holding means, and after pressing the end face of the concrete portion of the joint structure and the end face of the concrete portion of the column body, if necessary, The gap between the concrete part of the joint structure and the concrete part of the pillar,
A filling material such as grout is injected into the gap between the through hole of the joint structure and the connecting steel rod.

The long column steel frame of the column body and the short column steel frame of the joint structure are joined as follows. (A) A joint structure is placed on each pillar built at the pillar forming position of the lower body, and the concave or convex portion at the upper end of the pillar body and the convex or concave portion at the lower end of the joint structure are formed. The end face of the concrete part of the joint structure and the column body are made to fit by making the axial force not act on the short column steel frame and the long column steel frame, and by introducing the tensile force to the connecting rebar or the weight of the upper skeleton. With the end faces of the concrete portion of the column body in pressure contact with each other, the upper end of the long column steel frame of the column body and the lower end of the short column steel frame of the joint structure are joined by welding. (B) A pillar is erected on the joint structure of the lower body, and the concave or convex portion at the upper end of the joint structure and the convex or concave portion at the lower end of the pillar are fitted together to form a short pillar steel frame and With the axial force not acting on the long column steel frame, the end face of the concrete part of the joint structure and the end face of the concrete part of the column body are mutually connected by introducing the weight of the upper structure or the tensile force to the connecting rebar. In a state of pressure contact, the lower end of the short column steel frame of the joint structure and the upper end of the long column steel frame of the column body are joined by welding. To prevent the axial compressive force from acting on the short column steel frame and the long column steel frame when the end faces of the concrete portion of the joint structure and column are pressed, for example, the concrete portion of the joint structure and column can be prevented. The joint structure and the pillar are formed so that the end faces around the upper and lower ends project slightly from the upper and lower end faces of the short and long pillar steel frames. And when the end faces of the concrete part are pressed against each other,
A gap suitable for welding is formed between the end surface of the short column steel frame and the end surface of the long column steel frame. This way,
The skeleton load can be supported by the concrete portion of the joint structure and the concrete portion of the pillar. It is also possible to fix the beams of the pair of joint structure members to the beam attachment members so that the C-shaped members can be placed on the pair of column members. As the beam to be attached to the beam attachment body of the joint structure, for example, a steel frame beam or a steel frame reinforced concrete beam having an exposed steel frame portion at its end is used.

[0008]

Embodiments will be described with reference to FIGS. 1 to 7 of the first embodiment. The joint structure 10 is composed of a short steel column 11, a stiffener 12, a beam attachment 13, a concrete portion 14, and the like. The steel column body 11 is formed by cutting a tubular body of octagonal closed type cross section made of steel to a length longer than the beam length, and the beam attachment body 13 is made of the same H-shaped steel beam as the steel beam 30 attached thereto. It is made by cutting it to the specified length. H of the same beam as the beam mount 13
The shaped steel is cut into short steel frames 12A.
The flange is left with a triangular portion remaining and the other portion is cut off to form a horizontal stiffener 12a by the triangular portion and a vertical stiffener 12b by its web.
Four short steel frames 3A are crossed in a cross shape, and the crossing portions are integrally joined by welding or the like to form a cross-shaped stiffener 12. A short octagonal closed-section steel frame body 11 is arranged around the cross-shaped stiffener 12, and the end of the horizontal stiffener 12a of the stiffener 12 and the vertical stiffener 12 are arranged.
The ends of b are welded to the inner surface of every other side of the octagonal steel column 11. In addition, the horizontal stiffener 12a and the vertical stiffener 12 of the stiffener 12 of the octagonal steel column body 11 are connected.
The beam attachment body 13 is welded to the outer side surface of the side where b is welded to manufacture the steel frame portion 10A of the joint structure 10. The steel frame portion 10A of the connection forming body 10 is erected on the lower mold body having the octagonal concave portion, and the upper mold body having a short octagonal columnar convex portion in the lower center is used as the steel frame portion. Mount on 10A,
A middle bar for forming a through hole is arranged at a predetermined position between the lower and upper mold bodies, and a short steel frame pillar is passed through a gap between the short columnar convex portion of the upper mold body and the upper end of the steel frame pillar body 11. Body 11
Concrete is cast inside and in the gap, and an octagonal concave portion 14a is provided at the upper end and an octagonal convex portion 14b is provided at the lower end.
3 and 4 is provided with the concrete portion 14 having the through holes 14c in the longitudinal direction at four positions. In addition, as shown in FIG. 8, the upper end surface and the convex portion 1 around the concave portion 14 a of the concrete portion 14
The lower end surface around 4b is the upper end surface 11a of the short steel frame body 11.
And slightly protrude from the lower end surface 11b.

The columnar body 20 is composed of a columnar steel frame 21 made of a tube body having a closed cross section, a concrete portion 22, and a connecting steel rod 23 arranged in the longitudinal direction. The column steel frame 21 is formed by cutting a tubular body having a closed octagonal cross section made of steel into a length shorter than the floor height, and the connecting steel rod 23 is a normal PC steel rod having a predetermined length (that is, a steel frame column). Length of body 21 and joint structure 1
It is formed by cutting into a length of about 0 with the length of the column steel frame 11). A pillar steel frame 21 is formed on the lower mold body having an octagonal recess.
The upper mold body having an octagonal short columnar protrusion in the center of the lower side is mounted on the steel frame portion 21, and the connecting sleeve 24 is fitted to the lower end of the connecting steel rod 23. The connecting steel rods 23 are arranged between the mold bodies, and the upper portion of the connecting steel bar 23 is projected from the upper mold body, and is passed through the gap between the short columnar projection of the upper mold body and the upper end of the column steel frame 21. , Concrete is cast in the pillar steel frame 21 and in the gap, and an octagonal recess 22a is provided at the upper end, an octagonal projection 22b is provided at the lower end, and four connecting steels extending in the longitudinal direction are provided at predetermined positions. The pillar body 20 shown in FIGS. 5 and 6 is formed with the concrete portion 22 in which the rod 23 is embedded. As shown in FIG. 8, the upper end surface around the concave portion 22a and the lower end surface around the convex portion 22b of the concrete portion 22 are slightly projected from the upper end surface 21a and the lower end surface 21b of the short steel columnar body 21.

Next, a construction method for constructing a building frame using the joint structure 10 and the pillar 20 will be described. At a plurality of pillar formation positions of the lower skeleton, a short pipe body 25 having a closed octagonal cross section made of steel is fixed, concrete 26 is filled in the pipe body 25, and an octagonal shape is formed at the center of the concrete 26 portion. A recessed portion 26a is formed, and a connecting steel rod 27 is projected at a predetermined position of the recessed portion 26a. The columnar body 20 is erected on each of the tubular bodies 25 at the plurality of column forming positions of the lower skeleton.
The respective connecting steel rods 27 of the respective concave portions 26a are passed through the holes of the respective connecting sleeves 24 of FIG.
Are fitted into the recesses 26a, cement is injected into the gaps between the holes of the connecting sleeves 24 and the connecting steel rods 27, and the connecting sleeves and the connecting steel rods 27 are firmly coupled. The cement is injected through the injection hole formed at the lower end of each column 20. In addition, cement is injected into the gap between the convex portion 22b and the concave portion 26a at the bottom of each pillar 20 by an appropriate means to vertically build a plurality of pillars 20 at predetermined positions. The joint structure 10 is placed on each of the pillars 20 built at predetermined positions. In this case, each connecting member 10 is hoisted by an appropriate hoisting means, each connecting steel rod 23 protruding and extending above each column 20 and each through hole of each connecting member 10. Each joint structure 1 while fitting together with 14c
0 to suspend the octagonal convex portion 14 of each joint structure 10.
b is fitted into the octagonal recess 22a of each column 20. Next, each joint structure 10 is fitted with a washer w on each connecting steel rod 23 protruding into the recess 14a at the upper end, and a nut n is screwed into the threaded portion of the connecting steel rod 23 to fix the upper end of each connecting steel rod 23. By pulling with a jack, a tensile force (prestress) is introduced into the connecting steel rod 23, the nut n is tightened, the introduced tensile force is held, and the joint structure 10 and the column 20 are firmly coupled. Then, a steel frame beam 30 is arranged between the beam attachment body 13 and the beam attachment body 13 of each connection structure body 10, and the steel frame beam is temporarily attached to the beam attachment body 13 using a support plate, bolts, nuts and the like. .. The work of introducing the tensile force to the connecting steel rod 23 and holding the tensile force may be performed after the temporary attachment of the steel beam.

In a similar manner, as shown in FIG. 8, the pillars 20 on the upper floor are erected on the respective lower-portion constituent bodies 10, and the connecting sleeves on the lower portions of the pillars 20 on the upper floor are respectively arranged. The nuts n in the recesses 14a of each of the joint structure bodies 10 below the holes 24
The upper end of each connecting steel rod 23 projecting upward, and the lower convex portion 22b of each upper pillar 20 is fitted into the concave portion 14a of each lower joint structure 10, Cement is injected into the gap between the hole of each connection sleeve 24 of the columnar body 20 and the upper end portion of the connection steel rod 23 to firmly bond each connection sleeve 24 and the connection steel rod 23. Cement 28 is injected by an appropriate means into the gap between the lower convex portion 22b of each upper columnar body 20 and the concave portion 14a of each lower joint structure body 10 to form a lower joint structure body. An upper column 20 is vertically installed at a predetermined position above 10. In the same manner as described above, the upper-layer joint structure 10 is placed on each upper-layer pillar 20 that is built on the lower joint structure 10, and the upper-layer joint structure 10 is mounted. The lower convex portion 14b of the structural body 10 is fitted into the upper concave portion 22a of each column 20 on the upper floor. In the same manner as described above, the washers w are fitted to the respective connecting steel rods 23 in the recesses 14a of the respective upper-part connection constituting bodies 10, and the nuts n are attached to the threaded portions of the connecting steel rods 23.
Is screwed in, the upper end of each connecting steel rod 23 is pulled with a jack, a tensile force is introduced into the connecting steel rod 23, the nut n is tightened, the introduced tensile force is held, and the joint structure 10 and the column 20 are held. Is firmly connected to each other, and the steel beam of the upper floor is arranged between the beam mounting body 13 and the beam mounting body 13 of each of the upper-layer joint structure bodies 10, and the beam is attached by using the attachment plate and the bolts and nuts. The steel beam is fixed to the attachment body 13. In the same manner, the upper-layer connection structure 10, the pillars 20 and the steel beams are assembled to construct a high-rise building frame.

The method of joining the column steel frame 21 of the column body 20 and the column steel frame 11 of the joint structure 10 is as follows. The lower part of the joint structure 10 and the upper part of the column 20 are firmly coupled by a connecting steel rod 23 into which a tensile force is introduced, and as shown in FIG. Convex part 1
The end face around 4b and the end face around the recess 22a in the upper part of the concrete portion of the pillar 20 are pressed against each other, and the inclined lower end surface 11b of the short steel frame 11 and the long steel column 31
A gap g suitable for welding is formed between the slanted upper end surface 21a. In this state, the skeleton load is supported by the concrete portion 14 of the joint structure 10 and the concrete portion 22 of the column body 20, and the axial compressive force does not act on the short column steel frame 11 and the long column steel frame 21. Therefore, by filling the gap g with the molten welded steel, the short column steel frame 11 and the long column steel frame 21 can be connected to the lower end of the short column steel frame 11 and the upper end of the long column steel frame 21 in a state where no axial compressive force acts on the short column steel frame 11 and the long column steel frame 21. Can be joined. Therefore, welding can be performed at the stage where the load due to the weight of the upper frame does not sufficiently act on the joint. The upper and lower end faces of the concrete portion of the joint structure 10 and the pillar body 20 are formed in advance so that the axial force does not act on the short column steel frame and the long column steel frame in a state where these end faces are pressed against each other. deep. The connection sleeve 24 and the connection steel rod 2 are provided at the upper part of the connection forming body 10 and the lower part of the column 20.
Since it is a joint with 3, the upper end of the short column steel frame 11 and the lower end of the long column steel frame 21 are firmly joined by welding or the like after a predetermined load due to the weight of the upper frame or the like is applied to the joined portion. .. In this case as well, the end face around the concave portion 14a in the upper part of the concrete portion of the joint structure 10 and the end face around the lower convex portion 22b of the concrete portion of the pillar body 20 are pressed against each other, and the short steel pillar 11 Inclined upper surface 11a
A gap g suitable for welding is formed between the slanted lower end surface 21b of the long steel frame body 21 and the long steel frame body 21. In this state, the skeleton load is supported by the concrete portion 14 of the joint structure 10 and the concrete portion 22 of the column body 20, and the axial compressive force does not act on the short column steel frame 11 and the long column steel frame 21. Therefore, by filling the gap g with the molten welded steel, the short pillar steel frame 11 and the long pillar steel frame 21 can be connected to the upper end of the short pillar steel frame 11 and the lower end of the long pillar steel frame 21 in the state where no axial compressive force acts on the short pillar steel frame 11 and the long pillar steel frame 21. Can be joined. Since the pillar steel frame 21 of the pillar body 20 and the pillar steel frame of the joint construction body 10 are joined together to construct a building skeleton in a state where the axial compressive force does not act on the short pillar steel frame 11 and the long pillar steel frame 21, Even if a large load is applied to the building frame after the building is completed, there is no fear that the column steel frame composed of the short column steel frame 11 and the long column steel frame 21 will buckle. It should be noted that the upper end of the columnar body 20 and the lower end of the connecting body 10 are joined together without using a connecting steel rod into which tensile force is introduced, and the columnar body 2 is
0 and the lower end of the joint structure 10 may be pressure-welded, and then the upper ends of the long column steel frames 21 and the lower ends of the short column steel frames 11 may be welded. The lower end of 20 may be welded to the lower end of the long column steel frame 21, the short column steel frame 11 and the upper end by pressure welding using a connecting steel rod having a tensile force introduced.

The second embodiment shown in FIGS. 9 to 10 is a cross-shaped stiffener 12 forming a part of the joint structure 10.
Is an example in which a plate-shaped steel frame 12A made of steel, the width of which is substantially equal to that of the H-shaped steel beam of the beam attachment body 13, is cross-shaped and the crossing portions are integrally joined by welding or the like. The vertical plate-shaped portion of the steel frame 12A of the stiffener 12 becomes the vertical stiffener 12b. The other configuration of the joint structure 10 is the same as in the first embodiment.
Is the same as Embodiment 3 shown in FIGS. 11 to 12 is a short pillar steel frame 11 that constitutes a part of the joint structure 10.
Is an example in which a ready-made steel pipe having a circular cross section is cut into a predetermined length. The stiffener 1 that constitutes the joint structure 10.
2, the structure of the beam attachment body 13, the concrete portion 14, etc. is substantially the same as that of the first embodiment. However, the pillar steel frame that is the main part of the pillar body is formed by cutting an existing steel pipe into a predetermined length, like the short pillar steel frame 11, and is formed into a concave portion 14a in the upper portion and a convex portion 14b in the lower portion of the joint structure 10. The concave portion on the upper side and the convex portion on the lower side of the pillar are circular in plan view. Example 4 shown in FIGS. 13 to 14 is an example in which a short column steel frame 11 forming a part of the joint structure 10 is cut into a predetermined length of a square steel pipe having a rectangular cross section. The configurations of the stiffener 12, the beam attachment body 13, the concrete portion 14 and the like that constitute the joint structure 10 are substantially the same as those in the first embodiment. However, the pillar steel frame which is the main part of the pillar body is formed by cutting an existing square steel pipe into a predetermined length as in the case of the short pillar steel frame 11, and the recessed portion 1 at the upper part of the joint structure 10
4a and the lower convex portion 14b and the upper concave portion and the lower convex portion of the columnar body are formed into a quadrangular shape in a plan view. In Example 5 shown in FIGS. 15 to 16, as a cross-shaped stiffener 12, short H-shaped steel frames 12A having the same beam shape as the H-shaped steel forming the beam mounting body are crossed and welded at the crossing portions. This is an example of using one formed by joining together, and a short H-shaped steel frame 12
The flange of A becomes the horizontal stiffener 12a and its web becomes the vertical stiffener 12b. Other configurations and the like of the joint structure 10 are the same as those of the first embodiment. Example 6 shown in FIGS. 17 to 18 is an example in which the same short column member 11 is used as in Example 3 and the cross-shaped stiffener 12 is the same as that in Example 5. The configuration other than the stiffener 12 is the same as that of the third embodiment. 19 to 20
7 is an example in which the same short column member 11 as in Example 4 is used and the cross-shaped stiffener 12 is also used in Example 5. The configuration other than the stiffener 12 is the same as that of the fourth embodiment.

[0014]

The present invention has the following effects (a) to (h) by having the structure described in the section of the claims. (A) According to the first aspect, the axial force acting on the column steel frame can be reliably transmitted to the concrete in the column steel frame, and the moment acting on the joint portion can be accurately dispersed to the column steel frame.
Also, the joint structure and the pillar can be easily unitized,
It is possible to join the lower part of the short column steel frame of the joint structure and the upper end of the column steel frame of the column body by welding without waiting for the construction of the upper building frame. (B) According to claim 2, since the pillar steel frame forming a part of the joint structure is short, even if it is manufactured by cutting a ready-made closed-section steel pipe body, it is short. The fixing work by welding the stiffener or the cotter to the inside of the pillar steel frame can be easily and surely performed without using a special welding machine tool. Further, the axial force acting on the column steel frame of the column body and the short column steel frame of the connection forming body can be reliably transmitted to the concrete portion in the column steel frame of the closed type cross section through the stiffener or the cotter. (C) According to the second and third aspects, since the concrete portion of the joint structure and the concrete portion of the column can be joined by fitting the concave portion and the convex portion, the force acting on those concrete portions. Can be reliably transmitted. In addition, when placing the lower part of the pillar part of the joint structure on the pillar or building the pillar on the upper part of the pillar part of the joint structure, the positional relationship between Since it is regulated by fitting with, mounting work and building work become easy. (D) According to the fourth aspect, the connecting rebar can be shortened. (E) According to claim 5, prestress can be introduced into the concrete portion of the column body, and the lower end surface of the joint structure and the upper end surface of the column body can be strongly pressed against each other. .. (F) According to claim 6, even if the joint structure, the pillar, etc. are made into a unit and manufactured as a separate body, it is necessary to have a high degree of skill in the work of assembling them into a building body. Can be performed easily and surely. (G) According to claims 7 and 8, the axial force does not act on the short column steel frame and the long column steel frame, that is, in the state in which the frame load is supported only by the concrete portion of the joint structure and the column body. Since the short column steel frame of the joint structure and the long column steel frame of the column body can be joined by welding,
After the building is completed, even if a large load is applied to the building frame composed of the joint structure and the column, the steel column composed of the joint between the long column steel frame and the short column steel frame does not buckle. (H) Since the present invention is to unitize the connection structure body and the column body as separate bodies, even if they are formed by filling the inside thereof with concrete, they can be easily transported and lifted, No high level of skill is required for on-site assembly work.

[Brief description of drawings]

FIG. 1 is a view showing a steel frame portion of a joint structure of Example 1 taken along line A- of FIG.
Front view taken along the line A and seen in the direction of the arrow

FIG. 2 is a plan view of the one shown in FIG.

FIG. 3 is a front view of the joint structure of Example 1 as seen in the direction of the arrow, taken along the line BB in FIG.

FIG. 4 is a plan view of the one shown in FIG.

FIG. 5 is a front view of the columnar body of Example 1 taken along the line C-C in FIG. 6 and seen in the direction of the arrow.

FIG. 6 is a plan view of what is shown in FIG.

FIG. 7 is a front view showing a state in which the joint structure and the column body of Example 1 are coupled to each other, taken along the same line as CC line in FIG. 5 and viewed in the same arrow direction.

FIG. 8 is a front view showing an enlarged main part of FIG.

9 is a view showing the steel frame portion of the joint structure of Example 2 as shown in FIG.
-Front view taken along the line A and viewed in the direction of the arrow

FIG. 10 is a plan view of what is shown in FIG.

11 is a front view of the steel frame portion of the joint structure of Example 3 taken along the line AA in FIG. 12 and viewed in the direction of the arrow.

FIG. 12 is a plan view of what is shown in FIG.

FIG. 13 is a front view of the steel frame portion of the joint structure of Example 4 taken along the line AA of FIG. 14 and seen in the arrow direction.

FIG. 14 is a plan view of what is shown in FIG.

FIG. 15 is a front view of the steel frame portion of the joint structure of Example 5 as seen in the direction of the arrow, taken along the line AA in FIG.

16 is a plan view of the one shown in FIG.

FIG. 17 is a front view of the steel frame portion of the joint structure of Example 6 taken along the line AA of FIG. 18 and viewed in the direction of the arrow.

FIG. 18 is a plan view of that of FIG. 17;

FIG. 19 is a front view of the steel frame portion of the joint structure of Example 7 taken along the line AA of FIG. 20 and viewed in the direction of the arrow.

FIG. 20 is a plan view of that of FIG. 19;

FIG. 21 is a perspective view showing a steel frame, a reinforcing bar and the like of a conventional joint structure.

FIG. 22 is a plan view of that of FIG. 21.

FIG. 23 shows a steel frame, a reinforcing bar, etc. of another conventional joint structure.
4 is a front view taken along line DD of FIG.

FIG. 24 is a plan view of that of FIG. 23.

[Explanation of symbols]

 10 Connection structure 10A Steel part of connection structure 11 Short column steel frame 12A Short steel frame 12 Stiffener 12a Horizontal stiffener 12b Vertical stiffener 13 Beam mounting body 14 Concrete part 14a Recess 14b Convex part 14c Through hole 20 Pillar 21 Long pillar steel frame 22 Concrete Part 23 Connection Steel Bar 24 Connection Sleeve 25 Lower Body Tube 26 Concrete Part 26a Recess 26a 27 Connection Steel Bar g Gap n Nut w Washer

Claims (8)

[Claims] 1. A column body is composed of a long column steel frame having a closed cross section, a concrete portion filling the inside of the long column steel frame, and a connecting steel rod vertically embedded in the concrete portion. Mouth structure has a short column steel frame with a closed cross section, a beam attachment body welded to the outside of the short column steel frame, a stiffener or cotter welded to the inside of the short column steel frame, and concrete filling the inside of the short column steel frame And a plurality of vertically extending through holes formed in a concrete portion filling the inside of the short pillar steel frame, and the pillars are respectively built at a plurality of pillar forming positions of the lower body, and each pillar is formed. The joint structure is placed on the body, and the portions of the pillars projecting above the connecting steel rods are respectively passed through the through holes of the concrete portion of the connecting body, and are pulled to the connecting steel rods. Power is introduced The tensile force introduced into the connecting steel bar is held by an appropriate holding means, and the end face of the concrete portion of the joint structure and the end face of the concrete portion of the column body are pressed against each other, and the beam mounting body of the joint structure is attached. The end of the beam steel frame is fixed to the column structure, and the lower end of the short column steel frame of the joint structure and the upper end of the long column steel frame of the column body are welded to each other. Combined building body. 2. A beam mounting body is fixed to the outer side of a short column steel frame with a closed type cross section, a stiffener or a cotter is fixed to the inner side of the short column steel frame, and the inside of the short column steel frame is filled with concrete. A concave portion or a convex portion is formed in the center of the upper portion of the concrete portion, a convex portion or a concave portion is formed in the center of the lower portion of the concrete portion, and a through hole extending in the vertical direction is formed in the concrete portion. And the joint structure. 3. A pillar body includes a long pillar steel frame having a closed cross section, the inside of the long pillar steel frame is filled with concrete, and a concave portion or a convex portion is formed at the center of an upper portion of the concrete portion in the long pillar steel frame, A convex portion or a concave portion is formed in the center of the lower portion of the concrete portion, the connecting steel rod is embedded in the concrete portion in the vertical direction, and the upper portion of the connecting steel rod protrudes upward from the upper end of the pillar for a long time. Pillars characterized by. 4. The lower portion of the connecting steel rod is embedded in the concrete portion so that the fixing hardware fixed to the lower end portion of the connecting steel rod is located in the middle of the concrete portion in the long column steel frame. The columnar body according to claim 3, wherein: 5. A sheath is covered on an upper portion of a connecting steel rod embedded in a concrete portion in a pillar steel frame, and only a lower portion of the connecting steel rod is joined to the concrete portion. The column according to 3. 6. A short column steel frame having a closed cross section is filled with concrete, and a connecting steel rod is vertically embedded in a concrete portion of the long column steel frame to form a column body. Weld a beam attachment to the outside, weld a stiffener or cotter to the inside, fill the inside of the short pillar steel frame with concrete, and make a plurality of through holes in the vertical direction in the concrete part inside the short pillar steel frame Forming a structural body, the column body is respectively built in a plurality of column forming positions of the lower body, the portion projecting above the plurality of connecting steel rods of the column body into the through hole of the concrete portion of the joint structure. Through, each of the joint structure is placed on each column, the upper end of the connecting steel rod is pulled to introduce a tensile force into the connecting steel rod, and the tensile force introduced into the connecting steel rod is appropriately held. Hold the The column body characterized in that the end surface of the column portion and the end surface of the concrete portion of the column body are pressed against each other, and the lower end of the short column steel frame of the joint structure and the upper end of the long column steel frame of the column body are joined by welding. A method for constructing a building structure that connects the structure and the joint structure. 7. A columnar body is composed of a long column steel frame having a closed-type cross section and a concrete portion filling the inside of the long column steel frame, and a concave portion or a convex portion is formed at the center of the upper portion of the concrete portion to form a joint structure. A short column steel frame with a closed cross section, a beam attachment body welded to the outside of the short column steel frame, a stiffener or cotter welded to the inside of the short column steel frame, and a concrete portion filling the inside of the short column steel frame. A convex portion or a concave portion is formed in the center of the lower portion of the concrete portion, the pillar body is built in the pillar forming position of the lower body, and the joint structure is placed on each pillar body, The concave or convex portion at the upper end of the and the convex or concave portion at the lower end of the joint structure are fitted to each other so that the axial force does not act on the short column steel frame and the long column steel frame. The end face and the end face of the concrete part of the pillar are In the pressed state, the coupling method of the Joint structure and columnar body, characterized in that joining by welding an upper end of the long pillar steel of lower and pillars of short pillars steel of Joint structure. 8. A columnar body is composed of a long pillar steel frame with a closed type cross section and a concrete portion filling the inside of the long pillar steel frame, and a convex portion or a concave portion is formed at the center of the lower portion of the concrete portion, thereby forming a joint structure. A short column steel frame with a closed cross section, a beam attachment body welded to the outside of the short column steel frame, a stiffener or cotter welded to the inside of the short column steel frame, and a concrete portion filling the inside of the short column steel frame. A concave part or a convex part is formed in the center of the upper part of the concrete part, and a pillar is built on the joint structure of the lower working body, and the concave part or convex part and the pillar body of the upper end of the joint structure are formed. The convex surface or the concave portion at the lower end of the column is fitted so that the axial force does not act on the short column steel frame and the long column steel frame, and the end surface of the concrete part of the joint structure and the end surface of the concrete part of the column body are mutually With the pressure contacted, the joint structure Coupling method between Joint structure and columnar body, characterized in that joining the lower end of the long pillar steel frame short body pillar steel of the top and the columnar body by welding.