JP2004353441A - Column-to-beam connecting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily join a steel tube column to an H-shaped steel frame beam, and secure quality. <P>SOLUTION: In this column-to-beam connecting structure for connecting the steel tube column 1 to the H-shaped steel frame beam 2, an outside steel tube 4 larger in diameter than the cross section of the column having slits 5 is disposed on the outer periphery of the steel tube column 1, the column and beam connection members 6 are inserted into the slits 5, and beam connection piece parts 6a are projected to the outside of the outside steel tube 4. Slit engagement parts 6b are disposed on the inside of the outside steel tube 4, the beam connection pieces 6a are connected to beam flanges 2a and 2b with high tension bolts 7, and a material 8 hardening with elapse of time is filled in a clearance between the steel tube column 1 and the outside steel tube 4. Thus, the steel tube column 1 and the outside steel tube 4 can be formed integrally with the column and the beam connection member 6. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

TECHNICAL FIELD The present invention relates to a joint structure between a steel pipe column serving as a building steel frame and an H-shaped steel beam.

  Conventionally, there are a through-diaphragm type and an outer-diaphragm type as a method of joining an H-shaped steel beam to a hollow or concrete-filled circular or square steel pipe column.

  As shown in FIGS. 9A and 10A, the through-diaphragm joining method cuts the steel pipe column 1 at the joining position of the flange 2A and the web 2B of the beam 2 and casts or forms a plate there. A ring-shaped or plate-shaped diaphragm 3 for mounting a beam flange cut and formed from the steel plate is sandwiched, and the steel pipe column 1 and the diaphragm 3 are welded and rejoined as a single column. This is performed by welding W of 2A. However, such a through-diaphragm type has a problem that a great deal of time is required for processing such as cutting and re-welding of a steel pipe. This method requires processing time such as cutting of a steel pipe as a column and re-welding of the cut portion, so that it takes much time. In addition, field welding of the diaphragm and the beam flange is required, which requires a great deal of quality control.

  On the other hand, as shown in FIGS. 9 (b) and 10 (b), a joining method using an outer diaphragm is such that a ring-shaped diaphragm 3 having a size just fitted to the outer diameter of the steel pipe column 1 is cast or cut from a plate. After the diaphragm 3 is fitted into the steel pipe column 1 and welded to the steel pipe column 1 at the joint position of the flange 2A of the beam 2, the flange 2A of the beam 2 is welded to the diaphragm 3. This makes it possible to avoid processing troubles such as cutting and re-welding of the steel pipe column 1 as in the through-diaphragm type.

  However, in the case of such an outer diaphragm type, when a ring is cut out of a plate at the time of manufacturing the diaphragm 3, material waste occurs due to holes remaining in the plate material after the ring is cut out, and the material yield is poor. In order to avoid this waste of material, there is a method in which the diaphragm is divided and cut out and then joined in a ring shape by welding when the diaphragm is attached to a steel pipe column, but it takes time and effort such as welding. Also, in the case of casting, although the material yield is good, there is a problem that a molding die is required for each ring size of the diaphragm 3 and the material strength is restricted, thereby hindering the degree of freedom in design. This method requires on-site welding of the diaphragm and the beam flange, as in the case of the through-diaphragm, and accordingly requires a great deal of quality control. In addition, it is difficult to change the mounting position of the beam with the column with the diaphragm in relation to the installation error (horizontal direction, vertical direction) in the reverse hitting method (the reverse hitting method will be described later with reference to FIG. 11).

  In addition, in the connection type using the through-diaphragm and the outer diaphragm, the diaphragm 3 is attached to the steel pipe column 1 at a steel-frame processing plant in terms of work efficiency and welding quality control, and only beam attachment / joining is performed on site. Is The joint between the diaphragm and the steel beam flange attached to the column is often welded on site, but this also requires a great deal of work and quality control.

Further, JP-A-8-68115 and JP-A-8-4111 disclose a joining structure technique in which a steel pipe is provided on the outer periphery of a column. It requires a lot of processing time and quality control time.
JP-A-8-68115 JP-A-8-4111

  The conventional column / beam joint structure has problems in that it requires much processing time and quality control time, and that a construction error easily occurs. The present invention provides a joint structure of a column and a beam that eliminates the problems of the conventional techniques of processing time, quality control time, and construction error, easily joins a steel pipe column to an H-shaped steel beam, and ensures quality. The purpose is to:

  To achieve the above object, the present invention is configured as follows.

  According to a first aspect of the present invention, in a column / beam joint structure for joining a steel tube column and an H-shaped steel beam, an external steel tube having a slit and having a diameter larger than the column cross section is arranged on an outer periphery of the steel tube column, A column / beam joining member having a beam joining piece and a slit engaging portion is inserted into the slit to project the beam joining piece outside the outer steel pipe, and then bolt joining the beam joining piece and the beam flange. The gap between the outer steel pipe and the steel pipe column is filled with a time-curable material to integrate the column steel pipe, the outer steel pipe, and the joining member with each other.

  A second invention is characterized in that, in the first invention, the slit is formed above and below the outer steel pipe so as to insert upper and lower joining members provided corresponding to upper and lower flanges of a steel beam.

  In a third aspect based on the first aspect, the outer steel pipe is provided individually corresponding to each of the joining members joined to the upper and lower flanges of the steel beam, and the slit for inserting the joining member through each outer steel pipe is provided. It is characterized by having.

  According to a fourth aspect of the present invention, in a column / beam joint structure for joining a steel pipe column and an H-shaped section steel beam, a diameter of the column section is larger than that of the column section corresponding to each joining member joined to upper and lower flanges of the steel beam. A pair of upper and lower outer steel pipes having a large diameter is arranged on the outer periphery of the column, and a slit is formed between the upper and lower outer steel pipes, and a column / beam connecting member having a beam connecting piece and a slit engaging portion is inserted through the slit. Then, by projecting the beam joint piece to the outside of the external steel pipe, bolt-joining the beam joint piece and the beam flange, and filling a gap between the external steel pipe and the steel pipe column with a time-curable material. Each of the column steel pipe, the external steel pipe, and the joining member is integrated with each other.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the slit engagement portion of the column / beam joining member is in surface contact with the inner surface of the outer steel pipe.

  According to a sixth aspect of the present invention, in any one of the first to fourth aspects, the slit engagement portion of the column / beam joining member is in surface contact with the inner surface of the outer steel pipe, and the contact portion is moved inward and outward. The slit engaging portion and the external steel pipe are integrally connected with each other by a bolt to be inserted.

  In a seventh aspect based on any one of the first to sixth aspects, the outer steel pipe is divided in a circumferential direction, and is formed in a ring shape by bolting or welding between the divided members. It is characterized by having.

  According to an eighth invention, in any one of the first to seventh inventions, both or one of the outer surface of the steel pipe column and the inner surface of the outer peripheral steel pipe is provided with a slip stopper that engages with the time-hardening material. It is characterized by having.

  According to the joint structure of a column and a beam according to the present invention, a joining member is inserted into a slit formed in an external steel pipe arranged on the outer periphery of a steel pipe column, and a beam joining piece is projected outward of the external steel pipe. Since the slit engagement part is arranged on the inside and the time-hardening material is filled between the steel pipe column and the external steel pipe, the members are integrated with each other, so the stress from the beam flange is reduced to the joint member, the external steel pipe and the time-hardening The material can be transmitted to the pillar via the conductive material, and a large amount of welding and quality control work required in the conventional diaphragm method and the like are not required. In addition, since the position of the joint member and the external steel pipe can be adjusted before the time-hardening material is applied, not only the above-ground structure but also the underground structure constructed by the back-in-place method is absorbed. Becomes easier.

Further, by making the slit engagement portion of the column / beam joint member come into surface contact with the inner surface of the external steel pipe, the tensile force of the beam flange is transmitted at the contact surface between the column / beam joint member, which is a metal joint, and the external steel pipe. By doing so, the excellent out-of-plane resistance of the outer steel pipe can be exhibited, and the slip property of the joint can be suppressed without destruction of the time-hardening material, and the rigidity of the joint can be further improved. In addition to the above, by integrally connecting the slit engaging portion and the outer steel pipe with bolts that penetrate the surface contact portion inside and outside, the shear force acting on the joining portion can be reduced to the bearing pressure of the temporally hardening material + the bolt joining portion. And the transmission of shear stress is assured.

  An embodiment of the present invention will be described below with reference to FIGS.

  FIG. 1 is an explanatory side view schematically showing an overall configuration of a column / beam joint structure according to a first embodiment of the present invention, and FIG. 2A is an enlarged view of the column / beam joint structure of FIG. FIG. 2B is a cross-sectional plan view, FIG. 2B is a longitudinal sectional view, and FIG. 1C is a partial view of FIG.

  On the outer periphery of the steel pipe column 1 made of a circular or square steel pipe, an external steel pipe 4 made of a circular or square steel pipe larger than the column section is disposed, and slits 5 are formed at upper and lower portions of the external steel pipe 4 to form a T-shaped cross section. Is inserted from the inside of the slit 5 to the outside so that the slit engaging portion 6b of the column / beam joining member 6 is engaged with the inside of the slit 5, and the beam joining piece 6a is After projecting to the outside of the slit 5, in the upper column / beam joint member 6, the beam joint piece 6 a is applied to the upper surface of the upper flan 2 a of the H-shaped steel beam 2, and the high-strength bolt 7 In the lower column / beam joining member 6, the beam joining piece 6 a is applied to the lower surface of the lower flange 2 b of the H-shaped section steel beam 2 and friction joined with the high-strength bolt 7. I do.

  The gap between the steel pipe column 1 and the external steel pipe 4 is filled with a time-hardening material 8 such as mortar and hardened, thereby integrating the steel pipe column 1, the external steel pipe 4, and the column / beam joint member 6 having a T-shaped cross section. ing.

  In the first embodiment, the upper and lower portions of the external steel pipe 4 having a predetermined length in the vertical direction are opposed to the beams 2 connected to the steel pipe column 1 from four sides. Upper and lower slits 5 and 5 are provided at positions corresponding to the upper and lower flanges 2a and 2b, and the beam joining piece 6a of the column / beam joining member 6 is inserted and arranged in each of the upper and lower slits 5 and 5.

  Further, between the upper and lower column / beam joining members 6, a rectangular shear plate 11 is welded to the outer peripheral surface of the outer steel pipe 4 in correspondence with the web 2 c of each beam 2. A plurality of bolt insertion holes 12 are formed in the shear plate 11 in rows vertically. Then, the bolt insertion hole 12 of the shear plate 11 is aligned with the bolt insertion hole 12 formed at the end of the web 2 c of the beam 2, and the high-strength bolt 7 is inserted into both bolt insertion holes 12, so that The web 2c of the beam 2 and the outer steel pipe 4 are joined. At the time of joining, since the bolt insertion hole 12 of the shear plate 11 and the web 2c is a long hole, vertical and horizontal adjustment between both joining members is performed.

  As described above, the space between the steel tube column 1, the external steel tube 4, and the column / beam joining member 6 is integrated by filling and hardening the time-hardening material 8; In order to improve the integration with the steel pipe and to improve the shearing force acting between the two members, one or both of the outer peripheral surface of the steel pipe column 1 and the inner peripheral surface of the outer steel pipe 4 are used to shift the beam shear force. A stop projection (shear key) 10 is provided to provide a joint structure having a strength capable of transmitting the stress of the external steel pipe 4 and the beam 2 to the steel pipe column 1 via the hardening material 8 with time.

  According to the above-described column / beam joint structure of the present invention, the bending stress of the beam 2 is controlled by the column / beam joint member 6, the temporal hardening material 8 and the external steel pipe 4 through the upper and lower flange portions 2 a. Is transmitted to. The shear force of the beam 2 is welded to the external steel pipe 4 in advance, and the web 2c of the beam 2 is welded by the shear plate 11 joined by the high-strength bolt 7 to the steel pipe column through the temporal hardening material 8 and the external steel pipe 4. 1 is transmitted. Note that the beam-shearing force can be transmitted by the column / beam joining member 6 without providing the shear plate 11.

  Here, the construction process at the time of column / beam joining will be described. First, at the stage of factory production, an external steel pipe 4 having a slit 5 is manufactured, and a beam joint piece 6a of a column / beam joint member 6 having a T-shaped cross section is inserted from the inside of the slit 5 to the outside to form an external steel pipe 4 And the slit engagement portion 6 b is engaged with the inside of the slit 5.

  The external steel pipe 4 on which the column / beam joining member 6 is disposed as described above is disposed at a predetermined height position of the steel pipe column 1 and is temporarily supported. Next, the upper and lower column / beam joining members 6 are applied to the upper and lower surfaces of the upper and lower flanges 2 a and 2 b of the H-shaped steel beam 2, and the contact portions are friction-joined with high-strength bolts 7. Further, the shear plate 11 to be welded and the web 2 c of the beam 2 are friction-bonded to the outer steel pipe 4 by the high-strength bolt 7.

  Next, in the above-mentioned state, the position of the outer steel pipe 4 is adjusted vertically and horizontally with respect to the steel pipe column 1 via a gap, and the error between the beam 2 and the steel pipe column 1 is corrected and temporarily supported in this state. . Next, the space between the external steel pipe 4 and the steel pipe column 1 is filled with a time-curable material 8 and hardened. When the time-curable material 8 is filled, the gap between the lower end of the external steel pipe 4 and the steel pipe column 1 and the gap between the slit 5 and the column / beam joining member 6 are arbitrary so that the time-curable material 8 does not leak. The sealing member 13 is subjected to a filling material leakage preventing process.

  According to the first embodiment, the external steel pipe 4 fitted to the steel pipe column 1, the column / beam joining member 6 engaged with the external steel pipe 4 through the slit 5, and the gap between the steel pipe column 1 and the external steel pipe 4 The beam 2 is joined to the steel pipe column 1 by integrating the members by hardening of the time-curable material 8 to be filled into the steel tube, so that a large amount of welding and welding required in the conventional diaphragm method and the like is required. This eliminates the need for quality control. In addition, since the position of the column / beam joint member 6 and the external steel pipe 4 can be adjusted before the time-hardening material 8 is applied, not only the above-ground frame but also particularly the reverse striking method (to be described later with reference to FIG. 11). In the underground framing construction constructed according to (1), it is easy to absorb construction errors.

  FIGS. 3A and 3B show a second embodiment. In the first embodiment, one outer steel pipe 4 has a predetermined length, and slits 5, 5 corresponding to the upper and lower flanges 2 a, 2 b of the H-shaped section steel beam 2 are provided in the upper and lower portions. Upper and lower column / beam joining members 6 are provided through the respective slits 5. On the other hand, in the second embodiment, two upper and lower outer steel pipes 4, 4 are provided corresponding to the upper and lower flanges 2a, 2b of the H-shaped section steel beam 2, and each of the outer steel pipes 4, 4 is provided. An example is shown in which slits 5 or 5 corresponding to the upper and lower flanges 2a and 2b are provided, and column / beam joining members 6 and 6 corresponding to the upper and lower flanges 2a and 2b are provided in each slit 5 or 5.

  In the second embodiment, between the upper and lower outer steel pipes 4, a rectangular connecting plate 14 corresponding to the web 2 c of each beam 2 is welded to the outer peripheral surface of the steel pipe column 1 by welding. Are joined. The connection plate 14 is provided with a plurality of bolt insertion holes 12 formed of long holes, which are vertically arranged in rows. Further, a shear plate 11 having a plurality of bolt insertion holes 12 is provided vertically along both sides, and includes a bolt insertion hole 12 on one side of the shear plate 11 and an elongated hole formed at an end of the web 2 c of the beam 2. The high-strength bolt 7 is inserted into the bolt insertion hole 12 to join the two members with the bolt, and the high-strength bolt 7 is inserted into the bolt insertion hole 12 formed on the other side of the shear plate 11 and the connection plate 14. Then, the end of the web 2c of the beam 2 and the steel pipe column 1 are connected. Since the connection plate 14 and the bolt insertion hole 12 of the web 2c are long holes, the vertical and horizontal adjustment between the two joining members is performed. Other configurations are the same as those of the first embodiment.

  FIG. 3C shows a third embodiment. The third embodiment corresponds to a modification of the second embodiment. That is, the third embodiment has a shape in which the upper and lower outer steel pipes 4 in the second embodiment are vertically divided. That is, each of the upper and lower outer steel pipes 4, 4 is composed of upper and lower split steel pipes 4a, 4b, and the upper and lower split steel pipes 4a, 4a are arranged at a predetermined interval to form slits 5 between them. An example in which is formed is shown.

  In the third embodiment, similarly to the second embodiment, a high-strength bolt 7 is provided between the steel pipe column 1 and the web 2c of the beam 2 via a connection plate 14 and a shear plate 11 welded to the steel pipe column 1. Are joined. Other configurations are the same as those of the first and second embodiments.

  FIG. 4 shows a fourth embodiment. In the fourth embodiment, one outer steel pipe 4 is divided into two parts at symmetrical positions in the circumferential direction, and the divided steel pipes 4c and 4d are detachably joined to each other by bolts 16 via joining plates 15 and 15. Here is an example. According to the fourth embodiment, since the outer steel pipe 4 is constituted by the divided steel pipes 4c and 4d divided in the circumferential direction, like the outer steel pipe 4 of the first to third embodiments, the upper part of the steel pipe column 1 is provided. Even if it does not fit, it is good to assemble the ring between the divided steel pipes 4c and 4d with the bolt 16 via the joining plates 15 and 15 at the part where the beams 2 of each floor are joined, and the workability is improved. Other configurations are the same as those of the first to third embodiments.

  FIG. 5 shows a fifth embodiment. The basic configuration of the fifth embodiment is the same as that of the first embodiment. The fifth embodiment is different from the first embodiment in that neither the outer circumferential surface of the steel pipe column 1 nor the inner circumferential surface of the outer steel pipe 4 is provided with the slip prevention projections 10, and other configurations are provided. Is the same as in the first embodiment. Even in the fifth embodiment, the steel pipe column 1, the external steel pipe 4, and the column / beam joining member 6 can be integrated by the temporal hardening material 8, and the simplicity of the configuration in the column / beam joining structure, and the processing and construction. Advantages such as easiness and easy adjustment of construction errors can be exhibited.

  FIG. 6 shows a sixth embodiment. The basic configuration of the sixth embodiment is the same as that of the first embodiment. The difference between the sixth embodiment and the first embodiment is that, in the first embodiment, the slit engaging portion 6b of the column / beam joining member 6 and the inner surface of the outer steel pipe 4 are interposed via the time-hardenable material 8. On the other hand, in the sixth embodiment, the point is that the slit engaging portion 6b of the column / beam joining member 6 and the inner surface of the outer steel pipe 4 are in surface contact. Such surface contact enables an excellent out-of-plane resistance to the tensile force of the beam upper and lower flanges 2a and 2b (details will be described with reference to FIG. 8).

  FIG. 7 shows a seventh embodiment. The seventh embodiment is different from the sixth embodiment in that the slit engagement portion 6b of the column / beam joining member 4 and the inner surface of the outer steel pipe 4 are brought into surface contact, and this surface contact portion is inserted into and out of the outside. In that the high-strength bolt 9 is provided and fastened with a nut 9a. By the bolt joining in addition to the surface contact, excellent out-of-plane resistance against the tensile force of the beam upper and lower flanges 2a and 2b can be exhibited, and a strong transmission function against the shearing force can be exhibited ( Details will be described with reference to FIG. 8).

  FIGS. 8A to 8E show the transmission of the force at the column / beam joint in the first to seventh embodiments. To explain in order, FIGS. 8A, 8B, and 8C show non-contact between the slit engagement portion 6 b of the column / beam joint member 6 and the inner surface of the outer steel pipe 4 in the first to fifth embodiments. It is a longitudinal cross-sectional view which shows the beam flange tension force, beam flange compression force, and beam shearing force which act on both members in a state by an arrow.

  When a beam flange tensile force is applied by the steel beam 2 in the direction of the arrow in FIG. 8A, the slit engagement portion 6 b transmits stress in the outer steel pipe 4 through the bearing of the temporally hardenable material 8, It exhibits excellent out-of-plane resistance of the outer steel pipe 4. As shown in FIG. 8B, when a beam flange compressive force is applied by the steel beam 2, the slit engaging portion 6 b transmits stress to the steel pipe column 1 in the external steel pipe 4 through the bearing of the temporally hardenable material 8. . Further, when a beam flange shear force is applied by the steel beam 2 as shown in FIG. 8C, the beam joint piece 6a and the slit engaging portion 6b are sheared by the bearing of the temporally hardenable material 8 in the external steel pipe 4. Transmit stress.

  FIG. 8D shows transmission of force at the column / beam joint in the sixth embodiment. In FIG. 8D, since the slit engagement portion 6b of the column / beam joining member 6 and the inner surface of the outer steel pipe 4 are in surface contact, the beam flange tensile force by the steel beam 2 acts as shown by the arrow in the figure. In this case, the slit engagement portion 6b directly transmits stress to the inner surface of the outer steel pipe 4 by supporting pressure, thereby exhibiting excellent out-of-plane resistance of the outer steel pipe 4. In addition, since there is no bearing on the hardening material 8 with time, there is no risk of breakage of the material and the slip property of the joint can be suppressed. As for the beam flange compressive force and the beam shear force, the stress is transmitted in the same manner as in FIGS.

  FIG. 8E shows the transmission of the force at the column / beam joint in the seventh embodiment. In FIG. 8E, the slit engagement portion 6b of the column / beam joining member 6 and the inner surface of the outer steel pipe 4 are in surface contact, and further, the surface contact portion is joined by the high-strength bolt 9, so that FIG. As described above, when the beam shearing force by the steel beam 2 acts, the shearing force can be reliably transmitted by the bearing pressure of the temporal hardening material 8 and the friction of the bolt joint.

  Next, a description will be given of a reverse striking method, which is one of application examples of the column / beam joint structure according to the present invention. When constructing an underground skeleton of a building having an underground, the reverse striking method is being used frequently because the construction period can be shortened compared to the conventional method.

  FIGS. 11A to 11D are diagrams showing an outline of the reverse hitting method.

  As shown in FIG. 11A, first, a retaining wall 22 is formed on the ground 21 so as to surround a planned building construction range. Next, a pile hole 23 is drilled inside the retaining wall 22 at a position where the pillar is to be erected. Then, the steel pipe column 1 made of a circular or square steel pipe is built in the pile hole 23. Before and after the steel pipe column 1 is erected, a support pile 24 made of concrete or the like is formed, and the steel pipe column 1 is supported by the support pile 24 by taking measures such as rooting the lower end of the steel pipe column 1.

  After the steel pipe columns 1 have been built, the pile holes 23 above the support piles 24 are backfilled with excavated soil 25 as shown in FIG. At this time, on the ground surface, the first floor (floor frame) 26 is installed as a support for the steel pipe column 1. Next, the inside of the retaining wall 22 is excavated by an excavator. In this case, the excavator is carried into the underground part and the worker enters and exits the basement through the temporary opening 27 of the floor frame 26.

  When excavating the underground portion, as shown in FIG. 11 (c), the backfilled soil 25 on the outer periphery of the steel pipe column 1 is also simultaneously "hanged" to expose the steel pipe column 1 in a bare manner. When such excavation of the first basement floor is completed, a beam 2 made of an H-shaped section steel frame constituting the first basement floor is joined to the steel pipe column 1.

  After joining the columns and beams, as shown in FIG. 11D, reinforced concrete 28 is poured into the bottom and outer periphery of the first basement floor to construct the floor and space of the first basement floor. Such a process is repeated to construct a space on the second basement floor. At this time, the beam 2 is also joined to the steel pipe column 1 on the ground floor part simultaneously on the ground, and the ground floor part is constructed. As described above, the reverse construction method can shorten the construction period because the underground portion and the above-ground portion can be constructed simultaneously in parallel.

  In the above-mentioned reverse striking method, since the steel pipe pillars to be built in the ground, that is, the straight pillars, have large errors in the horizontal and height directions, if the diaphragm is mounted in advance, the mounting position of the beam There is also a problem that it is difficult to change such as In addition, since the underground space is high in humidity, quality control is more important than the above-ground frame for on-site welding of the beam flange and the diaphragm. In this case, the above-mentioned problem is solved by applying the column / beam joint structure according to the present invention described in the first to fifth embodiments.

In the drawings, examples of a combination of the steel pipe column 1 and the external steel pipe 4 are a circle and a circle, and a square and a square. However, these combinations are arbitrary, and a combination of a circle and a square may be used. Further, when the column / beam joining member is brought into surface contact with the inner surface of the circular outer steel pipe, it is preferable that the slit engaging portion is formed in an arc shape in accordance with the steel pipe. In addition, the configuration shown in each embodiment may be modified as appropriate, for example, such that the column / beam joint member having a T-shaped cross section has an L-shaped cross section and can be inserted from the outside of the external steel pipe.
[Operation of Embodiment]

According to the column / beam joining structure according to the present embodiment, the joining member is inserted into the slit formed in the external steel pipe disposed on the outer periphery of the steel pipe column, and the slit engaging portion is projected outside the external steel pipe, thereby forming the external steel pipe. Since the slit engaging part is arranged inside and the time hardening material is filled between the steel pipe column and the external steel pipe, the members are integrated with each other, so the stress from the beam flange is reduced to the joint member and the external steel pipe and the time. The beam can be transmitted to the column via the curable material, and a large amount of welding and quality control work required in the conventional diaphragm method and the like are not required. In addition, since the position of the joint member and the external steel pipe can be adjusted before the time-hardening material is applied, not only the above-ground structure but also the underground structure constructed by the back-in-place method is absorbed. Becomes easier.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory side view schematically showing an overall configuration of a column / beam joint structure according to a first embodiment of the present invention. 2A is a cross-sectional plan view showing an enlarged column / beam joint structure in FIG. 1, FIG. 2B is a longitudinal sectional view, and FIG. 2C is a partial view of FIG. (A) is an enlarged longitudinal sectional view showing a column / beam joint structure according to the second embodiment, (b) is a partial view of FIG. (A), and (c) is a column according to the third embodiment. -It is a longitudinal cross-sectional view which expands and shows a beam joining structure. (A), (b) is a cross-sectional top view which expands and shows the column / beam joint structure which concerns on 4th Embodiment. It is a longitudinal section showing the column and beam joint structure concerning a 5th embodiment on an enlarged scale. It is a longitudinal cross-sectional view which expands and shows the column / beam joint structure which concerns on 6th Embodiment. (A), (b) is the cross-sectional view and longitudinal cross-sectional view which expand and show the column / beam joint structure which concerns on 7th Embodiment. (A), (b), and (c) are beam flange tensile forces, beam flange compressive forces, and beam shear forces acting on both members in a non-contact state between the slit engagement portion of the beam joining member and the inner surface of the external steel pipe. And (d) and (e) show the beam flange tensile force and beam shear force acting on both members in the state of contact between the slit engagement portion and the inner surface of the external steel pipe and the state of bolt connection, respectively. FIG. (A), (b) is a cross-sectional view which shows the joining condition of the column and beam by the conventional through diaphragm type and the outer diaphragm type. (A), (b) is a longitudinal cross-sectional view which shows the joining condition of the column and beam by the conventional through diaphragm type and the outer diaphragm type. (A), (b), (c), (d) is a process drawing showing a reverse driving method.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Steel pipe column 2 Steel beam 2a Upper flange 2b Lower flange 2c Web 3 Diaphragm 4 External steel pipe 4a Split steel pipe 4b Split steel pipe 4c Split steel pipe 5 Slit 6 Column / beam joining member 6a Beam joining piece 6b Slit engaging part 7 High strength bolt 9 High-strength bolt 8 Temporary hardening material 10 Non-slip 11 Shear plate 12 Bolt insertion hole 13 Sealing member 14 Connection plate 15 Joint plate 16 Bolt 21 Ground 22 Mountain stop material 23 Pile hole 24 Support pile 25 Excavated soil 26 First floor (Floor frame)
27 Temporary opening 28 Concrete

Claims (8)

In a column / beam joint structure for joining a steel tube column and an H-shaped steel beam, an external steel tube having a slit and having a diameter larger than the column cross section is arranged on the outer periphery of the steel tube column, and a beam joint piece and a slit are provided. A column / beam joining member having an engaging portion is inserted into a slit, the beam joining piece is projected outside the external steel pipe, and the beam joining piece and a beam flange are bolted to the external steel pipe. A column / beam joining structure, wherein each member of the column steel tube, the external steel tube, and the joining member is integrated with each other by filling a space between the steel tube columns with a time-hardening material. 2. The column / beam joint structure according to claim 1, wherein the slits are formed above and below the outer steel pipe so as to pass upper and lower joint members provided corresponding to upper and lower flanges of the steel beam. The said external steel pipe is provided corresponding to each joining member joined to the upper and lower flanges of a steel beam, and has a slit which penetrates a joining member through each external steel pipe. 2. The column / beam joint structure according to 1. In a column / beam joint structure for joining a steel pipe column and an H-shaped steel beam, a pair of upper and lower outer members having a diameter larger than the column cross section corresponding to each joint member joined to the upper and lower flanges of the steel beam. A steel pipe is arranged on the outer periphery of the column, and a slit is formed between the upper and lower external steel pipes, and a column / beam joining member having a beam joining piece portion and a slit engaging portion is inserted through the slit, and the beam joining piece is formed. Part is projected to the outside of the external steel pipe, and the beam joint piece and the beam flange are bolted to each other, and the space between the external steel pipe and the steel pipe column is filled with a time-curable material to thereby allow the column steel pipe and the external A column / beam joint structure in which each member of a steel pipe and a joint member is integrated with each other. The column / beam joining structure according to any one of claims 1 to 4, wherein a slit engaging portion of the column / beam joining member is in surface contact with an inner surface of the external steel pipe. The slit engaging portion of the column / beam joining member is in surface contact with the inner surface of the external steel pipe, and the slit engaging portion and the external steel pipe are integrally connected by a bolt that penetrates the contact portion inside and outside. The column / beam joint structure according to any one of claims 1 to 5, wherein The said external steel pipe is divided in the circumferential direction, and is formed in the shape of a ring more by bolt-joining or welding-joining between division members, The one according to any one of Claims 1-6 characterized by the above-mentioned. Column / beam joint structure. The slip stop which engages with a time hardening material is provided in the outer surface of a steel pipe pillar, and / or the inner surface of an outer peripheral steel pipe, The slip stopper is provided in any one of Claims 1-7 characterized by the above-mentioned. Column / beam joint structure.

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