JP3700129B2 - Joint structure of composite structure and construction method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a joint structure of a composite structure having a simple configuration, good workability, and high bonding strength, and a construction method thereof.
[0002]
[Prior art]
In recent years, buildings with a composite structure in which a filled steel pipe concrete structure is applied to a column and a steel structure is applied to a beam are being put into practical use. Thus, in the case where the columns and beams are different types of structural members, there is a search for an effective joint structure that can be structurally reliably and easily integrated. A joint structure has been proposed.
[0003]
Under such circumstances, a structure in which the steel pipe concrete column and the steel beam are joined via a cylindrical joint member is generally used as one of the joint structures of a composite structure building. This is because a joint member to which a steel beam is joined on the side surface is disposed between steel pipes that are connected vertically, and a filler is filled inside the joint member and the upper and lower steel pipes. , To build a joint structure. In these joint structures, stress transmission between the steel pipe and the joint member is smoothly performed via a filler filled inward.
[0004]
[Problems to be solved by the invention]
However, the joint portion having such a configuration is affected by the properties of the filler, and considering the fact that the weight and the seismic force act during an earthquake, it is necessary to construct the joint member large. Arise.
[0005]
In view of the above circumstances, an object of the present invention is to provide a joint structure of a composite structure having a simple configuration, good workability, and high bonding strength, and a method for constructing the same.
[0006]
[Means for Solving the Problems]
The joint structure of the composite structure according to claim 1 is a joint structure of a composite structure building composed of a steel pipe concrete column made of filled steel pipe concrete in which concrete is filled in a steel pipe and a steel frame steel beam. The steel pipe, a plurality of outward projecting members fixed on the normal line at a predetermined interval in the circumferential direction on the outer peripheral surface in the vicinity of the upper end of the steel pipe, and the upper part protruded from the upper end surface of the steel pipe In a state, the steel pipe is disposed so as to include a plurality of reinforcing bars spaced apart at a predetermined interval along the inner peripheral surface of the steel pipe, and the vicinity of the upper end portion to which the outward projecting member of the steel pipe is fixed. A joint member made of a cylinder having an inward projecting member fixed at a position facing the outward projecting member, the steel beam joined to the side surface of the joint member, the steel pipe, and the joint portion The steel pipe is made of a filler filled inside the member. The fixed outward projecting member has a trapezoidal cross section in which the lower side is longer than the upper side and the outer side faces obliquely upward, and the inward projecting member fixed to the joint member is the outer side. It has a trapezoidal cross section with a long upper side compared to a lower side having an outer side parallel to the projecting member, and the outer side surfaces of the inner projecting member and the outer projecting member are in contact with each other.
[0007]
The joint structure of the composite structure according to claim 2 is characterized in that an upper end surface of the steel pipe projects upward from an upper end surface of the joint member.
[0008]
In the joint structure of the composite structure according to claim 3, a guide plate that is paired so as to be parallel to and sandwich the inner projecting member is fixed to the inner peripheral surface of the joint member. It is characterized by that.
[0009]
The joint structure of the composite structure according to claim 4, wherein a bottom plate having a hole through which the steel pipe passes is provided at a bottom portion of the joint member, and a hole edge portion of the bottom plate and the hole A filler is disposed in a gap with the outer peripheral surface of the steel pipe penetrating through the steel pipe.
[0010]
The method for constructing a joint structure for a composite structure according to claim 5 is characterized in that an outwardly projecting member having a trapezoidal cross section with a lower bottom is longer than a plurality of upper sides on the outer peripheral surface near the upper end of the steel pipe in the circumferential direction. A first step of adhering to the normal line with a predetermined interval on the inner peripheral surface of the joint member made of a cylindrical body, and an inward protruding member having an outer surface parallel to the outer protruding member. A second step of fixing at a position opposite to the side protruding member, and an upper end of the steel pipe inward of the joint member so that the outer protruding member and the outer side surface of the inner protruding member are in contact with each other. And a plurality of reinforcing bars spaced apart at predetermined intervals along the inner peripheral surface of the steel pipe so that the upper part protrudes from the upper end surface of the steel pipe, A fourth step of fixing the steel beam to the outer peripheral surface, and filling the inside of the steel pipe with a filler, It is characterized by comprising a fifth step of filling the filling material inward of the serial Joint section steel.
[0011]
According to a sixth aspect of the present invention, there is provided a method for constructing a joint structure of a composite structure, in the second step, on the inner peripheral surface of the joint member formed of a cylindrical body, A pair of guide plates that are parallel to and sandwiched between the inwardly projecting members are fixed, and in the third step, the joint member is placed along the outer projecting members between the paired guide plates. The steel pipe penetrates inwardly.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the joint structure of the composite structure of the present invention and the construction method thereof will be described in detail with reference to FIGS.
[0013]
As shown in FIG. 1, the joint structure 1 of a composite structure includes a steel pipe concrete column 2, a plurality of reinforcing bars 12 provided so as to protrude upward from the steel pipe concrete column 2, and the steel pipe concrete column 2. The joint member 5 includes the vicinity of the upper end portion, and the steel beam 10 fixed to the side surface of the joint member 5. Here, the steel beam 10 is made of H-section steel.
[0014]
The said steel pipe concrete pillar 2 is what filled the concrete 11 as a filler in the steel pipe 3 standingly arranged by the vertical-axis direction, and hold | maintains the outstanding proof stress by this concrete 11 being restrained by the said steel pipe 3. It is. Since the steel pipe 3 has a function of a shear reinforcement, the steel pipe concrete column 2 does not require a bar arrangement work like a reinforced concrete column.
[0015]
As shown in FIG. 2, an outward projecting member 4 is fixed to the outer peripheral surface near the upper end of the steel pipe 3 constituting the steel pipe concrete column 2. The outward projecting member 4 is formed of a steel plate having rigidity that is difficult to be deformed by an external force, and has a trapezoidal cross section whose upper side is shorter than the lower side. Therefore, the outer side surface 4a of the outward projecting member 4 is directed obliquely upward.
[0016]
In the present embodiment, the outward projecting member 4 is fixed to the outer peripheral surface of the steel pipe 3 so as to be disposed on four normal lines in the 90-degree direction when viewed from the central axis of the steel pipe 3. As long as the steel pipes 3 are evenly arranged at a predetermined interval in the circumferential direction, the steel pipes 3 may be arranged at three places or at four places or more. Furthermore, although the plate-like member is used for the outward projecting member 4, this is not particular, and any member having any thickness can be used as long as a diagonally upward gradient can be formed on the outer surface. good.
[0017]
By the way, in the vicinity of the upper end portion of the steel pipe 3 to which the outward projecting members 4 are fixed, the joint member 5 is disposed so as to enclose them. The joint member 5 includes a cylindrical body 6, an inward projecting member 7, a pair of guide plates 8, and a bottom plate 9.
[0018]
The cylindrical body 6 has an inner diameter capable of containing the steel pipe 3 in a state where the outer projecting member 4 is fixed to an outer peripheral surface, and has a member height capable of covering the entire outer projecting member 4. A bottom plate 9 having a hole through which the steel pipe 3 can penetrate is attached to the bottom of the bottom plate 9.
[0019]
As shown in FIG. 3, the bottom plate 9 is provided to be filled later with the filler 15 in the inside of the cylindrical body 6 constituting the joint portion member 5. When the steel pipe 3 is penetrated, the filling member 14 is sandwiched in the gap between the inner edge portion 9a of the hole of the bottom plate 9 and the outer peripheral surface of the steel pipe 3, and the bottom portion of the joint member 5 is sealed.
[0020]
On the other hand, the inner projecting member 7 is fixed to the inner peripheral surface of the cylindrical body 6 at a position facing the outer projecting member 4 when the steel pipe 3 is enclosed. The inward projecting member 7 is composed of a steel plate having rigidity that is difficult to be deformed by an external force, and has a trapezoidal cross section whose lower side is shorter than the upper side, and an outer side surface 7a thereof is It faces obliquely downward and has a gradient that can contact the outer surface 4a of the outward projecting member 4 between the surfaces.
[0021]
At this time, in the state in which the outer projecting member 4 and the outer surfaces 4a, 7a of the inner projecting member 7 are joined to each other by the surface, the steel pipe in which the vicinity of the upper end portion is disposed inward of the joint member 5 In consideration of the mounting height of the outward projecting member 4, the upper end surface 3 a of 3 is arranged at a position protruding slightly above the upper end surface 5 a of the joint member 5 as shown in FIG. 3. deep. This is because a steel beam is to be joined to the joint member 5 later by positioning a joint part when the new steel pipe 3 is placed on the upper part of the steel pipe 3 above the joint member 5. This is because it is not necessary to place a new steel pipe 3 until the concrete of the floor slab constructed above 10 is driven.
[0022]
Furthermore, as shown in FIG. 4, a pair is formed on the inner peripheral surface of the cylindrical body 6 in the vicinity of both side portions of the inwardly projecting member 7 so as to be parallel to the inwardly projecting member 7 and to sandwich them. An eggplant guide plate 8 is fixed. This is because the steel pipe 3 is inserted into the joint member 5 later and the outer surface 4 a of the outward projecting member 4 of the steel pipe 3 and the inward projecting member 7 of the cylindrical body 6 constituting the joint member 5. When the outer surface 7a is abutted between the surfaces, the outer projecting member 4 fixed to the steel pipe 3 is inserted so as to be along between the pair of guide plates 8, thereby easily positioning the outer surface 7a. It is intended to do.
[0023]
In addition, as a positioning guide when the steel pipe 3 is inserted into the joint member 5, a notch (not shown) is formed in the bottom plate 9 that is positioned coaxially with the space sandwiched between the pair of guide plates 8 in the vertical direction. Is provided. Also by inserting the position of the head of the outwardly projecting member 4 of the steel pipe 3 into the notch part, the outer side surface 4a of the outwardly projecting member 4 of the steel pipe 3 and the joint part member 5 are configured. The outer surface 7a of the inwardly projecting member 7 of the cylindrical body 6 can be easily butted against each other.
[0024]
On the other hand, a car rebar 13 is placed on the upper end surface 3 a of the steel pipe 3. The cage reinforcing bars 13 are integrated in advance using the hoop bars 13a so that a plurality of reinforcing bars 12 are evenly arranged at predetermined intervals along the inner peripheral surface of the steel pipe 3. Therefore, a plurality of reinforcing bars 12 can be arranged at desired positions of the steel pipe 3 by inserting the cage reinforcing bars 13 from above the steel pipe 3. At this time, by adjusting the mounting height of the hoop bars 13a with respect to the reinforcing bars 12 in advance, the positioning of the plurality of reinforcing bars 12 in the height direction with respect to the steel pipe 3 can be easily performed.
[0025]
The joint structure 1 of such a composite structure includes an outer surface 4 a of the outward projecting member 4 fixed to the outer peripheral surface of the steel pipe 3 and an inner side fixed to the inner peripheral surface of the joint member 5. By making the outer surface 7 a of the projecting member 7 come into contact with each other, the weight of the steel beam 10 is smoothly transmitted to the steel pipe 3.
[0026]
Moreover, this joint structure 1 arrange | positions the upper end surface 3a of the steel pipe 3 which comprises the said steel pipe concrete pillar 2 above the said joint part member 5, or makes VH isolation | separation above. The workability of the steel pipe concrete pillar 2 to be connected to the upper part later is ensured regardless of the placement or the integral placement.
[0027]
Thereby, as a function calculated | required by the filler 15 in the joint part with which the said cylinder 6 is filled, the stress by horizontal loads, such as a seismic force, becomes a main thing, a load is reduced, and this joint member 5 There is no need to form a large film.
[0028]
A method for constructing the joint structure 1 having the above-described configuration will be described below.
(First step)
In the outer peripheral surface of the steel pipe 3 constituting the steel pipe concrete column 2 carried into the site, in the vicinity of the upper end portion, the outer side surface 4a has a trapezoidal cross section having a long lower side compared to the upper side formed to face obliquely upward. After fixing the outward projecting member 4 by means of welding or the like so as to be on the normal line at four positions with an interval of 90 degrees from the central axis of the steel pipe 3, the steel pipe 3 is built in a desired position.
[0029]
(Second step)
In a factory or the like, an inward protrusion having a trapezoidal cross section with a long upper side compared to a lower side formed so that the outer side surface 7a faces obliquely downward on the inner peripheral surface of the cylindrical body 6 of the joint member 5 The member 7 is fixed by means of welding or the like so as to be on the normal line at four positions with an interval of 90 degrees from the central axis of the cylindrical body 6. Further, the pair of guide plates 8 are fixed by means such as welding so as to be parallel to both sides of the inwardly projecting member 7. Further, a bottom plate 9 having a hole through which the steel pipe 3 passes is fixed at the bottom.
[0030]
(Third step)
The upper end surface 3 a of the steel pipe 3 to which the outward projecting member 4 is fixed is applied to a hole provided in the bottom plate 9 of the joint member 5, and the head of the outward projecting member 4 is placed on the bottom plate 9. The outer projecting member 4 is inserted into the notch (not shown) so that the outer projecting member 4 is sandwiched between the guide plates 8 forming a pair with the joint member 5, and the outer projecting member 4 and the joint member of the steel pipe 3 are inserted. 5 inward projecting members 7 penetrate until the outer surfaces 4a and 7a contact each other.
[0031]
(Fourth process)
A car rebar 13 in which a plurality of rebars 12 are integrated in advance is placed on the upper end surface of the steel pipe 3, and the steel beam 10 is joined to the side surface of the joint member 5 by means such as bolt joining or welding. .
[0032]
Note that the plurality of reinforcing bars 12 form the joint structure 1 as the car reinforcing bar 13. The hoop bar 13a is an auxiliary reinforcing bar that secures the position of the reinforcing bar 12 until the filling part filling material 15 is driven, and is removed after the filling part filling material 15 is solidified.
[0033]
Further, the joining of the steel beam 10 is not limited to this, and a bracket is provided in advance on the side surface of the cylindrical body 6 forming the joint member 5, and the steel beam 10 is attached to the bracket on the ground before being built. It is good also as a structure joined and built.
[0034]
(Fifth step)
Thereafter, after filling the inside of the steel pipe 3 with the concrete 11, a floor slab constructed above the steel beam is constructed, and at the same time, the filler in the joint portion is formed inside the joint member 5. 15 is cast. Alternatively, VH separation casting and floor slab construction may be performed, and concrete casting of the floor slab and the filler in the joint portion 15 may be performed simultaneously with the concrete 11.
[0035]
According to the configuration described above, the joint structure 1 of the composite structure is fixed to the outer peripheral surface 4 a of the outward projecting member 4 fixed to the outer peripheral surface of the steel pipe 3 to the inner peripheral surface of the joint member 5. Since the outer surface 7 a of the inward projecting member 7 is in contact with each other, the own weight from the steel beam 10 is smoothly transmitted as the axial force of the steel pipe 3 through the joint member 5. In other words, when the steel beam 10 is installed, it is possible to omit a support for the joint member 5. Further, when a floor surface is formed using the steel beam 10, when a deck plate or a precast concrete plate is used as a flooring material, it is possible to construct a frame structure of a composite structure by non-supporting work.
[0036]
Further, since the own weight is transmitted from the steel beam 10 to the outward projecting member 4 of the steel pipe 3 through the inward projecting member 7 of the joint member 5, the steel pipe 3 and the joint member 5. The main stress transmitted by the filling portion 15 by the filling material 15 filled in the inside of the filling portion is dominated by a horizontal load such as seismic force, and a highly safe composite without increasing the size of the fitting member 5. It becomes possible to form the joint structure 1 of the structure.
[0037]
Further, the outer surface 4a of the outward projecting member 4 and the outer surface 7a of the inward projecting member 7 are in contact with each other in a state having a gradient with respect to the vertical axis. Is transmitted, frictional resistance is generated by compressing the joint surface, and the joint surface is more firmly joined and is free to rotate. It is possible to build a joint structure.
[0038]
The upper end surface of the steel pipe 3 is located at the upper end surface of the joint member 5 and the joint surface of the steel pipe 3 in the vertical direction is not included in the joint structure 1 until the concrete of the floor slab is driven. There is no need to install a new steel pipe 3 connected to the upper part.
[0039]
Since a pair of guide plates 8 are provided near both sides of the inward projecting member 7 of the joint member 5, positioning when the joint member 5 is arranged on the steel pipe 3 is easily performed. It is possible to improve the workability.
[0040]
A bottom plate 9 having a hole penetrating the steel pipe 3 in the center is provided at the bottom of the joint member 5, and a gap between the hole edge 9 a of the hole and the steel pipe 3 is a filling member 14. Since it is blocked, there is no need to use a formwork or the like when placing the filler 15 in the joint part 5 on the joint part member 5, which improves workability and greatly contributes to shortening the construction period. It becomes possible to do.
[0041]
【The invention's effect】
According to the joint structure of a composite structure according to claim 1, the joint of a composite structure building comprising a steel pipe concrete column made of a filled steel pipe concrete filled with concrete inside the steel pipe and a steel frame steel beam. The steel pipe, a plurality of outward projecting members fixed on the normal line at a predetermined interval in the circumferential direction on the outer peripheral surface in the vicinity of the upper end of the steel pipe, and an upper part than the upper end surface of the steel pipe A plurality of reinforcing bars that are spaced apart from each other at a predetermined interval along the inner peripheral surface of the steel pipe in a projecting state, and an inner peripheral surface that is disposed so as to contain the vicinity of the upper end portion to which the outward projecting member of the steel pipe is fixed The joint member made of a cylindrical body having the inward projecting member fixed at a position facing the outer projecting member, the steel beam joined to the side surface of the joint member, the steel pipe, and the finish It consists of a filler that fills the inside of the mouth member, and the front The outward projecting member fixed to the steel pipe has a trapezoidal cross section with the lower side longer than the upper side and the outer surface facing upward, and the inward projecting member fixed to the joint member is The inner projecting member has a trapezoidal cross section with a long upper side compared to the lower side having an outer surface parallel to the side projecting member, and the inner projecting member and the outer projecting member are in contact with each other on the outer surface. When the joint surface of the outer projecting member is compressed, frictional resistance is generated, and the joint is more firmly joined and is free to rotate. Therefore, when the weight of the steel beam is transmitted, bending stress is generated at the joint. This makes it possible to construct a safer joint structure.
[0042]
Further, since the weight of the steel beam is transmitted to the outward projecting member of the steel pipe via the inward projecting member of the joint member, the steel pipe and the joint member are filled inward. The main stress transmitted by the joint by the joint filler 15 is dominated by horizontal loads such as seismic force, and forms a highly safe joint structure without increasing the joint member. It becomes possible to do.
[0043]
According to the joint structure of the composite structure according to claim 2, since the upper end surface of the steel pipe projects upward from the upper end surface of the joint member, the joint surface of the steel pipe in the vertical direction is finished. Since it is not included in the mouth structure, the workability of a new steel pipe connected to the upper part is improved.
[0044]
According to the joint structure of the composite structure according to claim 3, the inner peripheral surface of the joint portion member is parallel to the inward projecting member and has a pair of guide plates that sandwich the pair. Since it adheres, positioning at the time of arrange | positioning a joint part member to the said steel pipe can be performed easily, and it becomes possible to improve workability.
[0045]
According to the joint structure of the composite structure according to claim 4, a bottom plate having a hole through which the steel pipe passes is provided at the bottom of the joint member, and a hole edge portion of the bottom plate, In the gap with the outer peripheral surface of the steel pipe penetrating through the hole, a filler is disposed, so when placing concrete into the joint member, there is no need to use a mold or the like, It is possible to improve workability and greatly contribute to shortening the construction period.
[0046]
According to the method for constructing a joint structure for a composite structure according to claim 5, an outward projecting member having a trapezoidal cross section having a lower side longer than a plurality of upper sides on the outer peripheral surface in the vicinity of the upper end of the steel pipe. A first step of fixing on a normal line with a predetermined interval in the circumferential direction; and an inwardly protruding member having an outer surface parallel to the outwardly protruding member on an inner peripheral surface of a joint member made of a cylindrical body. A second step of fixing at a position facing the outward projecting member; and the steel pipe inward of the joint member so that the outer projecting member and the outer surface of the inward projecting member are in contact with each other. A plurality of reinforcing bars spaced apart from each other at predetermined intervals along the inner peripheral surface of the steel pipe so that the upper part protrudes from the upper end surface of the steel pipe. A fourth step of fixing the steel beam to the outer peripheral surface of the member, and filling a filler inside the steel pipe In addition, since the fifth step of filling the inside of the joint part steel frame with the filler is performed, the weight of the steel beam is such that the outer protruding member and the outer surface of the inner protruding member are in contact with each other. Thus, the steel pipe is smoothly transmitted, and it is possible to omit a support for the joint member when the steel beam is built. In addition, when a floor surface is formed using the steel beam, when a deck plate or a precast concrete plate is used as a flooring material, it is possible to construct a frame structure of a composite structure by non-supporting work.
[0047]
According to the method for constructing a joint structure for a composite structure according to claim 6, in the second step, the inner peripheral surface of the joint member made of a cylindrical body is provided on both sides of the inward projecting member. A pair of guide plates that are parallel to and sandwiched between the inwardly projecting members are fixed to a portion, and the outer projecting members are placed between the paired guide plates in the third step while the joints are Since the steel pipe penetrates into the inner part of the member, it is possible to easily perform positioning when arranging the joint member in the steel pipe, and it is possible to improve the workability.
[Brief description of the drawings]
FIG. 1 is a diagram showing an outline of a joint structure of a composite structure according to the present invention.
FIG. 2 is a view showing an outline of a steel pipe and a joint member of a composite structure according to the present invention.
FIG. 3 is a view showing a cross section of the joint structure of the composite structure according to the present invention.
FIG. 4 is a diagram showing a plan view of a joint structure of a composite structure according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Joint structure 2 Steel pipe concrete pillar 3 Steel pipe 3a Upper end surface 4 Outward projecting member 4a Outer side surface 5 Joint part member 5a Upper end surface 6 Cylindrical body 7 Inward projecting member 8 Guide plate 9 Bottom plate 9a Inner edge 10 Steel beam 11 Concrete 12 Reinforcing Bar 13 Cage Reinforcing Bar 13a Hoop Bar 14 Filling Member 15 Filler in Filling Portion

Claims (6)

A steel pipe concrete column filled with concrete filled with concrete inside the steel pipe, and a joint structure of a composite structure building consisting of steel frame steel beams,
A plurality of outward projecting members fixed on the normal line with a predetermined interval in the circumferential direction on the outer peripheral surface near the upper end of the steel pipe;
In a state where the upper portion protrudes from the upper end surface of the steel pipe, a plurality of reinforcing bars that are spaced apart at a predetermined interval along the inner peripheral surface of the steel pipe,
A joint made of a tubular body that is disposed so as to contain the vicinity of the upper end portion to which the outwardly projecting member of the steel pipe is fixed, and that has the inwardly protruding member fixed at a position facing the outwardly protruding member on the inner peripheral surface. A member,
The steel beam joined to the side surface of the joint member;
The steel pipe and the filling material filled in the inside of the joint part member,
The outward projecting member fixed to the steel pipe has a trapezoidal cross section in which the lower side is longer than the upper side and the outer side faces obliquely upward,
The inward projecting member fixed to the joint member has a trapezoidal cross section having a long upper side compared to a lower side having an outer side parallel to the outer projecting member,
A joint structure for a composite structure, wherein the outer projecting member and the outer projecting member are in contact with each other at their outer surfaces. In the joint structure of the composite structure according to claim 1,
A joint structure for a composite structure, wherein an upper end surface of the steel pipe projects upward from an upper end surface of the joint member. In the joint structure of the composite structure according to claim 1 or 2,
A joint structure for a composite structure, characterized in that a guide plate that is parallel to the inwardly projecting member and that forms a pair is sandwiched between the inner peripheral surface of the joint portion member. In the joint structure of the composite structure according to any one of claims 1 to 3,
A bottom plate having a hole through which the steel pipe passes is provided at the bottom of the joint portion member,
A joint structure for a composite structure, wherein a filler is disposed in a gap between a hole edge portion of the bottom plate and an outer peripheral surface of the steel pipe penetrating through the hole. A first step of fixing an outward projecting member having a trapezoidal cross section having a long lower side compared to a plurality of upper sides on a normal line at a predetermined interval in the circumferential direction on the outer peripheral surface near the upper end of the steel pipe;
A second step of fixing an inner projecting member having an outer surface parallel to the outer projecting member to a position facing the outer projecting member on the inner peripheral surface of the joint member made of a cylindrical body;
A third step of inserting the upper end of the steel pipe into the inside of the joint member so that the outer surfaces of the outward projecting member and the outer projecting member are in contact with each other;
A plurality of reinforcing bars are spaced apart at predetermined intervals along the inner peripheral surface of the steel pipe so that the upper part protrudes from the upper end surface of the steel pipe, and a steel beam is fixed to the outer peripheral surface of the joint member. And the fifth step of filling the inside of the steel pipe with the filler and filling the filler into the inside of the steel pipe. Method. In the construction method of the joint structure of the composite structure according to claim 5,
In the second step, on the inner peripheral surface of the joint member made of a cylindrical body, a pair of guide plates that are parallel to and sandwiched between the inner projecting members on both sides of the inner projecting member are provided. Fastened,
In the third step, the steel pipe is penetrated inward of the joint member while the outward projecting member is placed between the pair of guide plates, and the joint structure of the composite structure is characterized in that How to build.

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