JP3956298B2 - Beam-column joint - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a beam-column joint, and more particularly, to a beam-column joint that can be reused as it is by eliminating welding from the beam-column joint and eliminating the need for gas cutting for dismantling after use of the building. .
[0002]
[Prior art]
In most cases, the beam-to-column joints of a steel structure building establish a rigid joint by welding in order to reduce the stress generated at the end of the member by rigid joining and to design a small cross-section. . However, in the case of column-beam joints that are rigidly joined by welding, it is necessary to cut the columns and beams with gas etc. when trying to reuse the used steel members for other buildings. It is impossible to dismantle.
[0003]
On the other hand, from the viewpoint of the global environment, it is desirable to reuse columns and beam members as they are, but in the case of column-beam joints that are rigidly joined by welding, it is difficult to reuse them as they are. Therefore, it is to be avoided as much as possible to rigidly join the beam-column joint by welding.
[0004]
Welding at beam-column joints includes skilled technical elements in addition to the above, and at the same time, including the weakening of the matrix due to the heat generated during welding and the risk of brittle fracture, Because of this, the avoidance of rigid joints by welding has been studied as a countermeasure for these problems.
[0005]
[Patent Document 1]
JP 2000-8480 (identification symbols “0028” to “0032” last line, FIG. 1)
[0006]
According to the present proposal, a gusset plate is arranged at a predetermined position of the column body, and a diaphragm by casting rigidity is fitted to the upper and lower positions thereof to eliminate welding joints, and a plate portion extended from each diaphragm in four directions; The flange of the beam member and the web are opposed to the gusset plate, and the two members are fastened together by bolt joining by inserting one-side bolts.
[0007]
However, the cost is increased by making the diaphragm with the plate part extended in all directions into casting rigidity, and the gusset plate is welded to the column, so there is a problem that requires gas cutting when reused after dismantling. ing.
[0008]
In addition, a proposal has been made to place a metal joint on a square steel pipe column on the lower floor and fix the square steel pipe pillar and steel beam on the upper floor to the joint metal without welding.
[0009]
[Patent Document 2]
JP-A-6-33514 (identification symbols “0010” to “0012”, FIGS. 1 and 2)
[0010]
According to this, half of the square steel pipe column on the upper floor is fitted on the joint hardware previously welded to the square steel pipe column on the lower floor, and is fixed on the intermediate support surface of the joint hardware, and then the steel frame is placed. While supporting the lower end of the end plate welded and fixed to the end of the beam with the flange provided on the square steel pipe column on the lower floor, the steel beam end plate and each square steel pipe column on the upper and lower floors are joined These high-strength bolts are screwed into the screw holes of the joint hardware and fixed together.
[0011]
Therefore, this proposal has the problem that extra cost is required by double column / beam joints because special joint hardware is welded on the square steel pipe columns on the lower floor. .
[0012]
As mentioned above, in the beam-column joint in a rope structure building, when trying to reuse the used steel member for other new buildings, it is not possible to dismantle the member intact from the joint rigidly joined by welding. Since it was impossible and it was necessary to cut columns and beams with gas, etc., it took a lot of labor to disassemble, so the work required to assemble and disassemble column beam joints can be simplified. In addition to improvements, the development of a beam-column joint that can reuse the removed columns and beams in a state almost similar to the raw material before processing has been desired.
[0013]
[Problems to be solved by the invention]
The present invention is proposed for the improvement in view of the above-mentioned present situation, and eliminates the need for gas cutting in the demolition after use of the building by eliminating welding from the column beam joints. The purpose is to provide a beam-column joint where the members can be reused as they are.
[0014]
[Means for Solving the Problems]
The column beam joint portion according to the present invention includes a column formed by fixing a lower joint diaphragm to the lower side of the beam joint portion, a beam placed on the joint diaphragm, and an upper joint disposed by loosely fitting the column on the upper side of the beam. Based on the construction of the beam and the beam holding member provided on the upper and lower joint diaphragms, the beam holding member can be a connecting bolt that connects the upper and lower joint diaphragms outside the beam flange, or each joint with the beam flange. It is characterized by connecting bolts that connect to the diaphragm. When reusing the steel members used in other new buildings, the pillars and beams can be cut with gas etc. just by removing the bolts from the outer diaphragm. By making it possible to dismantle each member without being damaged, the labor required for dismantling is minimized, and the column and beam members are reused as they are It has established a kill function.
[0015]
The other beam-column joint according to the present invention includes a column formed by fixing a lower joint diaphragm in the beam-beam joint, a lower node column having a predetermined number of free holes in the upper end portion, and a predetermined number in the lower end portion. An upper joint column having a free hole, a lower joint diaphragm arranged between both column ends, and a vertical joint in a state of fitting to the inner side surface of each column end portion with respect to the lower joint diaphragm In addition to the above functions, construction by welding is characterized by comprising a vertical plate having a predetermined number of screw holes and a high-strength bolt screwed into the screw holes of the vertical plate through the free holes of each column. Is completely eliminated.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
The column beam joint portion according to the present invention includes a column formed by fixing a lower joint diaphragm to the lower side of the beam joint portion, a beam placed on the joint diaphragm, and an upper joint disposed by loosely fitting the column on the upper side of the beam. It is composed of a beam holding member provided on the diaphragm and the upper and lower joint diaphragms, and the beam holding member is a coupling bolt for coupling the upper and lower side diaphragms outside the beam flange, or a coupling bolt for coupling the beam flange and each joint diaphragm. I have to.
Hereinafter, embodiments of a column beam joint according to the present invention will be described in detail with reference to the drawings.
[0017]
FIG. 1 is a perspective view showing a first embodiment of a beam-column joint according to the present invention. In the figure, the beam-column joint 1 includes a square steel pipe column 2, a beam 3, and an outer diaphragm 4. Yes.
[0018]
In the square steel pipe column 2, the lower joint diaphragm 4-1 is integrally fixed to the lower side position of the column beam joint 1 by welding. On the lower joint diaphragm 4-1, after the square steel pipe column 2 is built in a predetermined position, the end of the beam 3 is placed without being welded to the column 2. After completion, the upper joint diaphragm 4-2 is placed by dropping the upper joint diaphragm 4-2 loosely fitted to the square steel pipe column 2 on the upper surface of the end of the beam 3, so that the columns and beams are The beam direction is configured so that it can freely move between each other.
[0019]
The holding member 5 of the beam 3 in this embodiment is sandwiched between the lower joint diaphragm 4-1 and the upper joint diaphragm 4-2 that constitute the outer diaphragm 4 as described above, and the lower joint diaphragm 4-1. And the upper joint diaphragm 4-2 are firmly connected to each other by a connecting bolt 6 from which the beam 3 has been removed. This allows transmission of shearing force between the column and the beam and bending stress of the beam. This is what we are dealing with.
[0020]
Therefore, in the beam-column joint portion 1 according to the present embodiment, only welding is employed for fixing the rectangular steel pipe column 2 and the lower joint diaphragm 4-1, and no other welding work is used. Instead, a hole through which the connecting bolt 6 passes is formed in the outer diaphragm 4.
[0021]
As described above, the beam-column joint portion 1 of the present embodiment in the rope structure building only needs to remove the connecting bolt 6 from the outer diaphragm 4 when the used steel member is to be reused in another new building. It is possible to dismantle the members without any damage from the joints, minimizing the labor required for dismantling while eliminating the need to cut the pillars and beams with gas etc. It can be reused in a state close to the raw material before processing.
[0022]
FIG. 2 is a perspective view showing a second embodiment of the beam-column joint portion according to the present invention. In the drawing, the beam-column joint portion 10 is composed of a square steel pipe column 2, a beam 3 and an outer diaphragm 11. Yes.
[0023]
In the square steel pipe column 2, the lower joint diaphragm 11-1 is integrally fixed to the lower side position of the column beam joint 1 by welding. On the lower joint diaphragm 11-1, after the square steel pipe column 2 is built at a predetermined position, the end of the beam 3 is placed without being welded to the column 2, After the completion, the upper joint diaphragm 11-2 is arranged by dropping the upper joint diaphragm 11-2 loosely fitted to the square steel pipe column 2 onto the upper surface of the end portion of the beam 3.
[0024]
The holding member 12 of the beam 3 according to the present embodiment includes the lower joint diaphragm 11-1 and the upper joint diaphragm 11-2 constituting the outer diaphragm 11 as described above and the upper and lower flanges 13-1, 13 of the beam 3. -2 is juxtaposed with the connecting bolt 14 in a juxtaposed manner, and the columns / beams transmit shearing force between the columns / beams and bend the beams while preventing mutual movement in the beam direction. It deals with stress.
[0025]
Therefore, also in the case of the beam-column joint portion 10 in the present embodiment, only welding is employed for fixing the square steel pipe column 2 and the lower joint diaphragm 11-1, and other welding work is used at all. In addition, a hole through which the coupling bolt 14 passes is only opened in the outer diaphragm 11.
[0026]
As described above, the column beam joint portion 10 of the present embodiment in the rope structure building is also only to remove the coupling bolt 14 from the outer diaphragm 11 when the used steel member is to be reused in another new building. It is possible to dismantle the members without any damage from the joints, minimizing the labor required for dismantling while eliminating the need to cut the pillars and beams with gas etc. It can be reused in a state close to the raw material before processing.
[0027]
In each of the above embodiments, the column has been described as a square steel pipe column. However, the column is not limited to this, and can be applied to an H-shaped cross-sectional column or a circular cross-sectional column. Regarding the outer shape, a polygonal shape or a circular shape can be adopted.
[0028]
Another beam-column joint according to the present invention is characterized in that welding work in the beam-beam joint is completely eliminated, and a predetermined number of columns formed by fixing the lower joint diaphragm are provided at the upper end portion. A lower joint pillar having a free hole, an upper joint pillar having a predetermined number of free holes in the lower end portion, a lower joint diaphragm disposed between both pillar ends, and each pillar with respect to the lower joint diaphragm It consists of a vertical plate planted vertically and fitted with the inner surface of the end part, and a high-strength bolt screwed into the screw hole of the vertical plate through the free hole of each column. ing.
[0029]
FIG. 3: has shown embodiment in the other column beam junction part by this invention, and is sectional drawing (b) which looked at the side view (a) and the side view (a) from (b)-(b) arrow. It appears.
[0030]
As shown in the side view (a), the column beam joint 20 in the present embodiment connects the column 2 and the beam 3 corresponding thereto, and 22 is a predetermined number of free holes in the upper end portion. The lower joint pillar 23 is an upper joint pillar having a predetermined number of free holes in the lower end portion, and 24 is disposed between the pillar end of the lower joint pillar 22 and the pillar end of the upper joint pillar 23. This is a lower joint diaphragm coupled to the beam 3.
[0031]
As will be described later, a vertical plate 26 provided with a predetermined number of screw holes is vertically installed in the lower joint diaphragm 24. As shown in the sectional view of FIG. By screwing into the screw hole 28 of the vertical plate 26 through the free hole 27 of each column, the upper and lower columns 22 and 23 are interposed while the lower joint diaphragm 24 in which the vertical plate 26 is vertically installed is interposed. , Forming a solid monolithic structure.
[0032]
Therefore, in the present embodiment, the connection between the lower joint column 22 and the upper joint column 23 is established at the portion of the lower joint diaphragm 24 forming the column beam joint portion 20 and at the same time, without using any welding. It constitutes the beam-column joint.
[0033]
The high-strength one-side bolt or the normal high-strength bolt as the high-strength bolt 25 described in the present embodiment can be replaced with another high-strength bolt in the same manner as the above-described embodiment. It is.
[0034]
FIG. 4 is a side view (a) and a plan view (b) showing an embodiment for explaining the lower joint diaphragm in detail. As shown in the figure, the lower joint diaphragm 24 is processed into a shape that achieves joint with the beam, and the lower joint diaphragm 24 is provided with a vertical plate 26 that is vertically planted by welding. ing.
[0035]
The arrangement of the vertical plate 26 in the lower joint diaphragm 24 is a position that can secure a relationship that can be fitted to the inner surface of the column end portion of the steel pipe column, and the vertical plate 26 is a position that communicates with the free hole 27 of each column. A predetermined number of screw holes 28 are provided. The screw hole 28 is used for screwing the high-strength bolt 25 while inserting the free hole 27 of each column, whereby the steel pipe columns 22, 23, the vertical plate 26, and the lower joining diaphragm 24 are firmly fixed. It will be combined with the state.
[0036]
Therefore, the other beam-column joints according to the present invention can be used only by removing the strong bolts 25 from the columns 2 and the lower joint diaphragm 24 when the used steel members are to be reused in other new buildings. By making it possible to dismantle each member without being damaged, it is possible to dismantle each member without cutting, and at the same time, the labor required for disassembly is minimized. It can be reused in a state close to raw materials.
[0037]
The lower joint diaphragm 24 is non-porous in the present embodiment, but in the case of CFT or the like, it is possible to circulate the cast concrete by providing a hole in the center thereof. In place of the screw hole 28 provided in the vertical plate 26 employed in the above embodiment, the high-strength one-side bolt screwed into the screw hole, and the normal high-strength bolt, while providing a free hole in the vertical plate, other than the above It is also possible to adopt high strength bolts.
[0038]
As described above, the present invention has been described in detail on the basis of the embodiment. However, the column beam joint according to the present invention is not limited to the above embodiment, and the column, the outer diaphragm, the column / beam joint, and the like. It goes without saying that various changes can be made in the specific shape and the like within the scope of the present invention without departing from the spirit of the present invention.
[0039]
【The invention's effect】
The column beam joint portion according to the present invention includes a column formed by fixing a lower joint diaphragm to the lower side of the beam joint portion, a beam placed on the joint diaphragm, and an upper joint disposed by loosely fitting the column on the upper side of the beam. Based on the construction of the beam and the beam holding member provided on the upper and lower diaphragms, the beam holding member can be a connecting bolt that connects the upper and lower joint diaphragms outside the beam flange, and each beam flange and each joint. Since it is characterized by connecting bolts that connect the diaphragm, when removing the bolts from the outer diaphragm, the pillars and beams can be removed with gas, etc., when the steel members used are to be reused in other new buildings. Each member can be disassembled without being cut while eliminating the need for cutting, minimizing the labor required for disassembly, and the column and beam members can be reused as they are. We are frequently paid that effect.
[0040]
Another column-beam joint according to the present invention includes a column formed by fixing a lower joint diaphragm in the above-mentioned column-beam joint, a lower node column having a predetermined number of free holes in an upper end portion, and a predetermined number in a lower end portion. An upper joint column having a free hole, a lower joint diaphragm arranged between both column ends, and a vertical joint in a state of fitting to the inner surface of each column end portion with respect to the lower joint diaphragm In addition to the above-mentioned effects, it is characterized by comprising a vertical plate having a predetermined number of screw holes and a high-strength bolt that is screwed into the screw holes of the vertical plate through the free holes of each column. It has the effect of completely eliminating construction.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a first embodiment of a beam-column joint according to the present invention. FIG. 2 is a perspective view showing a second embodiment of a beam-column joint according to the present invention. FIG. 4 is a diagram of an embodiment of a lower joint diaphragm used for another column beam joint according to the present invention.
1, 10, 20 Column-beam joint, 2 Square steel pipe column, 3 Beam,
4, 11 Outer diaphragm, 4-1, 11-1 Lower joint diaphragm,
4-2, 11-2 Upper joint diaphragm, 5, 12 Holding member,
6 Connecting bolt, 13-1 Lower flange, 13-2 Upper flange,
14 coupling bolts, 22 lower joint pillar, 23 upper joint pillar,
24 lower joint diaphragm, 25 high strength bolt, 26 vertical plate,
27 free holes, 28 screw holes,

Claims (3)

A column formed by fixing a lower joint diaphragm to the lower side of the beam joint part, a beam placed on the joint diaphragm, an upper joint diaphragm placed loosely with the column on the upper side of the beam, and a beam provided on the upper and lower joint diaphragms A column comprising a holding member and fixed to the lower joint diaphragm is a lower node column having a predetermined number of free holes at the upper end portion, an upper node column having a predetermined number of free holes at the lower end portion, and both columns. A lower joining diaphragm arranged between the ends, and a vertical plate provided with a predetermined number of screw holes that are vertically implanted in a state of fitting to the inner side surface of each column end portion with respect to the lower joining diaphragm And a high-strength bolt that is screwed into the screw hole of the vertical plate through the free hole of each column .   The beam-to-column joint according to claim 1, wherein the beam holding member is a connecting bolt that connects the upper and lower joint diaphragms outside the beam flange.   2. The beam-to-column joint according to claim 1, wherein the beam holding member is a coupling bolt that couples the beam flange to each joint diaphragm.

Images