JP5439666B2 - Caucasian joint element - Google Patents

Description

  When constructing a steel structure such as a steel structure building, the present invention provides a steel beam such as an H-shaped rope, an I-shaped rope, a C-shaped rope on the side of a column made of a steel pipe such as a square steel pipe. Column beam connection structure with improved damage controllability, especially beam beam connection that prevents lateral buckling of the beam material (twist due to force in the direction perpendicular to the beam axis). Concerning structure.

When constructing a steel structure building, a column beam connection structure is widely adopted in which a diaphragm is provided at a beam connecting portion of a steel column member and a steel beam member is welded to the diaphragm portion.
This diaphragm beam-column connection structure is effective for building a steel structure with excellent earthquake resistance, but this type of beam-column connection by welding connection is not capable of plastic deformation up to a certain amount during a large earthquake. Since it is designed to ensure proof strength while allowing, it is difficult to repair at the time of a disaster, and a large repair cost is required.

In order to improve such a problem, a column-shaped joint element is provided at the beam-column joint, and in the event of a large earthquake, the damage is limited to the range of the joint element by controlling the damage of the frame, and the column can be repaired only by replacing the joint element. A beam joint structure has been developed and patented (Patent Document 1: Patent No. 3629638).
This column beam connection structure is bolt jointed to the column material side by the pin assumption method (method of joining by joint element that mainly resists axial force + shearing force acting on the beam) on the column end. In addition, a location that is a predetermined distance from the beam end and a location that is lower than the beam lower end surface of the column member are joined together with a cane-type joining element (a cane-like joining element that mainly acts on an axial force, The connecting elements are connected with each other.

  In addition, in the column-beam joint structure of Patent Document 1, the joint element between the column and the beam (axial force + shear force resistance joint element) is a pin joint by design, and the beam axis perpendicular direction acts on the beam during an earthquake or strong wind. Since the resistance force against horizontal force (lateral buckling resistance force (or torsion resistance force)) is insufficient, Patent Document 2 (Patent No. 3678709 “Joint between Column and Beam” is a technique for solving this problem of lateral buckling resistance force. Structure ").

In Patent Document 2, the lower flange of the beam end is joined to the column by a lateral buckling prevention member (a torsion resistance joining element that mainly resists torsion of the beam and allows movement in the beam axis direction). This lateral buckling prevention member prevents the lateral buckling of the beam.
In Patent Document 2, a description (paragraph number [0001]) that various cross-sectional shapes are assumed as the column material is used. However, in the examples, only H-shaped steel is used. The column member made of a square steel pipe is described only as a conventional split tee column beam connection structure (FIG. 17). In the embodiment, a one-side bolt is used as a means for joining the split tee to a pillar material that is a square steel pipe.

  In addition, in the patent document 1, the case of the column material by a square steel pipe is described also in the Example which is mostly the column material of H-section steel (FIG. 8, FIG. 9). That is, the lower end portion of the cane-shaped joining element (the connecting members 23 and 24) is joined to the column member 25 that is a square steel pipe. The joining means in this case also uses the one-side bolt 5.

Japanese Patent No. 3629638 Patent No. 3678709

If the pillar material is an H-section steel with an open cross-section, the lower end of the cane-type joining element or the lower end of the lateral buckling prevention material is screwed into a normal bolt (not a one-sided bolt on one side, but a nut. A structure that can be easily joined to the column with bolts on both sides that are operated from both sides).
However, when a square steel pipe is used as a pillar, it cannot be tightened with normal bolts on both sides because it has a closed cross section, and as described above, a one-side bolt that is a special bolt that can be fixed from one side is used. It becomes fixed. However, since one-side bolts are special, they are more expensive than normal double-sided bolts.
In addition, when a one-side bolt is used, a dedicated tool for tightening is required, and the type of tool required varies depending on the type of one-side bolt, which is inconvenient and cumbersome and reduces workability.
In addition, when bolts are fixed directly to the pillars, the number of missing sections increases because the bolt holes are provided in the pillars, which makes the design disadvantageous in terms of effective use of the section of the pillars due to the missing sections. Is disadvantageous.

  The present invention has been made to eliminate the above-mentioned conventional drawbacks. When the pillar material is a steel pipe, a special one-side bolt is used as a means for joining a brace-type joining element or a lateral buckling prevention material to the pillar material. It is an object of the present invention to provide a beam-to-column connection structure that can use general bolts on both sides.

Invention of Claim 1 which solves the above-mentioned subject is a column beam connection structure which attaches steel beam material to the side part of column material which consists of steel pipes,
The end of the beam is joined to the column with a beam end joint element that resists axial and shear forces acting on the beam, and a stiffening section is provided below the beam end joint element of the column. And
The stiffening portion includes a first receiving material and a second receiving material located above the first receiving material,
The upper end portion of the cane-shaped joining element is attached to a position away from the beam end in the lower flange of the beam member, and the lower end portion of the cane-shaped joining element is attached to the first receiving member,
An upper end portion of a lateral buckling prevention material is attached to the vicinity of a beam material end portion of the lower flange of the beam material, and a lower end portion of the lateral buckling prevention material is attached to a second receiving material. .

  According to a second aspect of the present invention, in the column beam connection structure according to the first aspect, the stiffening portion of the column member is supplemented by an outer diaphragm, an inner diaphragm, a through diaphragm, or a vertical stiffener provided at two positions above and below the column member. It is a rigid column beam joint.

  According to a third aspect of the present invention, in the beam-column joint structure according to the first aspect, the stiffening portion of the column member is an outer diaphragm provided at two upper and lower portions of the column member, and the first receiving member is the upper and lower outer members. It is a vertical rib-like member fixed between the diaphragms.

  According to a fourth aspect of the present invention, in the column beam connection structure according to the first aspect, the stiffening portion of the column member is an inner diaphragm provided at two positions above and below the column member, and the first receiving member is the column member in the column member. It is characterized by comprising a horizontal plate welded and fixed to the side surfaces of the upper and lower inner diaphragm positions and a vertical rib-like member fixed between the upper and lower horizontal plates.

  According to a fifth aspect of the present invention, in the column-beam joint structure according to the first aspect, the stiffening portion of the column material is a through diaphragm provided at two positions above and below the column material, and the first receiving material is the column material in the column material. 2. The beam-column joining structure according to claim 1, comprising a horizontal plate welded and fixed to the upper and lower through diaphragms and a vertical rib-like member fixed between the upper and lower horizontal plates.

  Claim 6 is the column beam connection structure according to claim 1, wherein the stiffening portion of the column material is a column beam connection portion in which the inside of the column material is stiffened by a vertical stiffener, and the first receiving material is It consists of a horizontal plate welded and fixed to the upper and lower side surfaces of the column beam joint part stiffened by the vertical stiffener in the column material, and a vertical rib-like member fixed between the upper and lower horizontal plates. And

Claim 7 is the column beam connection structure according to claim 1, wherein the stiffening portion of the column member is fixed by intervening welding in the middle of the column member as a part of the column and is substantially the same diameter as the column member. It is a short thick steel pipe that is thicker than the plate thickness.
The first receiving member includes a horizontal plate welded and fixed to two upper and lower side surfaces of the thick steel pipe and a vertical rib-like member fixed between the upper and lower horizontal plates.

  In the column-beam joint structure according to claim 8, the lateral buckling prevention material is a bent steel plate, and has a horizontal plate portion in surface contact with the lower flange of the beam on the upper end side and horizontally on the lower end side. It has a horizontal plate part which surface-contacts with a plate-shaped 2nd receiving material.

  A ninth aspect of the present invention provides the beam-column joint structure according to the eighth aspect, wherein the lateral buckling prevention material is a Z-shaped cross-section member.

  According to a tenth aspect of the present invention, in the beam-column joint structure according to the eighth aspect, the lateral buckling prevention material is a groove-shaped cross-sectional member in which the web is disposed facing the side surface of the column material.

  An eleventh aspect of the present invention is the beam-column joint structure according to any one of the first to tenth aspects, wherein the brace-shaped joint element includes a vertical plate portion that resists an axial force acting on the brace-type joint element. The vertical plate portion is laterally seated by an axial force that acts on the vertical plate portion of the main body portion, and a main body portion that is integrally provided at the upper end of the vertical plate portion and that is joined to the lower flange of the beam material. It is characterized by comprising a joining element buckling prevention member attached to the main body so as to prevent bending but not to bear the axial force acting on the vertical plate.

  Claim 12 is the beam-column joint structure according to claim 11, wherein the vertical plate portion of the main body portion of the cane-shaped joint element has a shape with a narrow plate width at the middle portion thereof, and the joint element buckling prevention member is A rectangular cylinder cross-sectional shape surrounding a narrow portion of the intermediate portion of the vertical plate portion is characterized.

  In the beam-to-column connection structure according to claim 1, the cane-type joining element is the cane-type joining element according to claim 11, and the first receiving material is the first receiving member according to claims 3 to 7. In the case of a receiving material, the lower end of the vertical surface portion of the main body portion of the cane-shaped joining element is opposed to the front end of the vertical rib-shaped first receiving material, and attachment plates are respectively provided from both sides in the vicinity of the facing portion. The attachment plate, the vertical plate portion, and the vertical rib are each joined by bolts.

According to the present invention, the first receiving member or the second receiving member provided on the stiffening portion of the column member, instead of directly connecting the cane-shaped joining element and the lateral buckling prevention member to the column member which is a steel pipe having a closed cross section. Since it joins to a material, it is not necessary to use a special one-side bolt that can be joined from one side, and it can be joined by a general bolt on both sides.
Special one-side bolts are not required and can be installed with ordinary tools, so there is no inconvenience and workability is good.
In addition, since it is not directly joined to the column material, there is no need to provide bolt holes in the column material, and therefore there is no cross-sectional defect due to the bolt holes, so the cross-section of the column material can be used effectively and an economical design. It can be a pillar.

  As a structure in which the first receiving member for joining the lower end portion of the cane-shaped joining element is provided on the pillar material side, as in claim 2, an outer diaphragm or an inner diaphragm provided at two upper and lower positions of the pillar material, or If the stiffening part of the column material is configured with a street diaphragm or a vertical stiffener, the cane type joint element and the lateral buckling prevention material can be easily joined to the column material side. And it is extremely suitable as a structure for joining both the lateral buckling prevention material to the column material side.

  The first receiving member in the form of a vertical rib fixed between the upper and lower outer diaphragms as in claim 3 or between the upper and lower horizontal plates as in claims 4 to 7 is provided with a cane-shaped joining element. It is easy to join the lower end portion of the rod, and the axial force acting on the cane type joining element can be transmitted without difficulty to the column member side, and the first lower end portion of the cane type joining element is joined. It is a very suitable structure as a receiving material.

  Since the lateral buckling prevention material having the shape as defined in claim 8 has high rigidity against a force acting in the horizontal direction perpendicular to the beam axis, it effectively functions as a member for preventing the lateral buckling of the beam material.

When the end portion of the beam material is separated from the side surface of the column material, the lateral buckling prevention material having a Z-shaped cross section as in claim 9 has high rigidity in the horizontal direction perpendicular to the beam axis, Since it can be easily deformed in the beam axis direction, it effectively resists torsion of the beam but allows movement in the beam axis direction. Therefore, the lateral buckling of the beam member 3 can be effectively prevented.
When the end portion of the beam material is brought close to the side surface of the column material, the lateral buckling prevention material having a groove-shaped cross-section with the web facing the side surface of the column material is the beam member 3 and the second receiving member. Since the members are connected substantially vertically and do not have much length in the longitudinal direction of the beam axis, a large restraining force against the torsion of the beam can be exhibited.

  A main body portion having a vertical plate portion that resists axial force and a joint element buckling that prevents the vertical plate portion from buckling laterally but does not bear the axial force acting on the vertical plate portion. Since the joint element buckling prevention member effectively prevents lateral buckling of the cane joint element, the brace joint element composed of the prevention member prevents the lateral buckling of the brace member from the lower flange of the beam material via the brace joint element. As a structure for transmitting axial force to a material, it is a structure capable of efficiently transmitting axial force to a pillar material (that is, a structure that ensures proof stress while allowing plastic deformation up to a certain amount).

  If the structure which joins the lower end part of a cane-shaped joining element to a pillar material is made into the structure like Claim 12, the lateral buckling of a cane-shaped joining element can be prevented efficiently.

  As a joining structure between the cane-shaped joining element and the column member, the lower end of the vertical surface portion of the main body part of the cane-shaped joining element and the first rib-shaped first receiving member as in the beam-to-column joining structure according to claim 13. A structure in which a front plate is opposed to each other, and a plate is attached from both sides in the vicinity of the opposed portion, and the plate, the vertical plate, and the first receiving member are respectively joined by bolts is a brace type joint element. It is a structure that can efficiently transmit the acting axial force to the column material (that is, a structure that ensures proof stress while allowing plastic deformation up to a certain amount).

The column beam connection structure of one Example of this invention is shown, (A) is a front view, (B) is an AA arrow top view of the principal part in (A). It is the figure which decomposed | disassembled and showed each member in FIG. It is the figure which showed the vicinity of the cane-shaped joining element in FIG. 1 except the joining element buckling prevention member which covered the cane-shaped joining element. It is the expanded BB cutting | disconnection end elevation in FIG. It is CC sectional drawing to which the principal part in FIG. 1 was expanded. It is DD sectional drawing to which the principal part in FIG. 3 was expanded. (A) is an enlarged view of the part of the lateral buckling prevention material in FIG. 1, (b) is a perspective view of the lateral buckling prevention material. It is the EE sectional drawing expanded in FIG. It is the FF arrow top view which expanded the principal part in FIG. The other Example of this invention is shown, (A) is a front view of a column beam connection structure when an inner diaphragm is used as a stiffening member of a column material, (B) is a G of the main part in (A). FIG. FIG. 6 shows still another embodiment of the present invention, in which (a) is a front view of a column beam connection structure when a through diaphragm is used as a stiffening member for a column member, and (b) is a view of a main part in (a). It is a HH arrow top view. It is. FIG. 7 shows still another embodiment of the present invention, in which (A) is a front view of a column beam connection structure when a vertical stiffener is used as a stiffening member for a column member, and (B) is a main part in (A). It is an II arrow top view. FIG. 5 shows still another embodiment of the present invention, in which (A) is a front view of a column beam connection structure when a thick steel pipe is used as a stiffening structure for a column member, and (B) is a main part in (A). It is a JJ arrow top view. It is. . In the Example of FIG. 1, it replaces with a Z-shaped cross-section member as a lateral buckling prevention material, and is a front view of a column beam joining structure when using a groove-shaped cross-section member.

  Hereinafter, a column beam joint structure embodying the present invention will be described with reference to the drawings.

1A and 1B show a column beam connection structure 1A according to an embodiment of the present invention. FIG. 1A is a front view, FIG. 1B is a plan view of the main part of FIG. It is the figure which decomposed | disassembled and showed each member by 1 (A). FIG. 3 is a view showing the vicinity of the cane-shaped joining element in FIG. 1 except for the joining element buckling prevention member placed on the cane-shaped joining element, and FIG. 4 is an enlarged end view taken along the line BB in FIG. 5 is an enlarged CC cross-sectional view of the main part in FIG. 1, and FIG. 6 is an enlarged DD cross-sectional view of the main part in FIG.
This column beam connection structure 1A is a column beam connection structure in which a steel beam member 3 is attached to a side portion of a column member 2 made of a steel pipe. In this embodiment, a square steel pipe is used as the column material 2 and an H-shaped steel is used as the beam material 3.

  The end portion of the beam member 3 is a beam end joint element that resists mainly axial force and shear force acting on the beam member 3 (joint element designed by regarding the joint portion as pin joint (so-called design It is joined to the pillar material in the joining element of the pin assumption system)) 4.

As shown in detail in FIGS. 8 and 9, the beam end joining element 4 is formed on the side surface of the column member 2, at right angles to the outer diaphragm 7 as a stiffener for beam joining and the lower surface of the outer diaphragm 7. The reinforcing rib 8 fixed by welding is fixed by welding, and the opposing portion of the end of the outer diaphragm 7 and the end of the upper flange 3b of the beam member 3 is sandwiched between the upper and lower attachment plates 9 and 10 and screwed to the bolt 11. It joins with the nut, and it joins with the bolt 13 and the nut screwed together by pinching the opposing part of the front-end | tip of the said reinforcement rib 8 and the edge part of the web 3c of the beam material 3 with the accessory plate 12 from both sides. It is a configuration.
Hereinafter, “joining with bolts and nuts” is simply abbreviated as “joining with bolts”. In addition, each bolt used in the column beam connection structure of the present invention is basically a high-strength bolt, as in a normal column beam connection structure, although not particularly specified.

In addition, a first receiving member 17 provided at the stiffening portion 16 of the column member 2 with the lower end portion of the cane-shaped joining element 15 having the upper end portion attached to the portion of the lower flange 3a of the beam member 3 away from the beam end. It is joined to.
The “stiffening portion 16 of the column 2” refers to a portion provided with a stiffener to prevent out-of-plane deformation of the column 2 which is a square steel pipe. In this embodiment, the outer surface of the column 2 is welded. It refers to a portion stiffened by two upper and lower outer diaphragms 18 and 19 as fixed stiffeners.
In other words, in this embodiment, the upper and lower sides of the column member 2 are structured so as to stiffen the column member 2 in order to provide the first receiving member on the column member 2 side for bonding the lower end portion of the cane-shaped joining element 15. Outer diaphragms 18 and 19 as stiffeners are provided at two locations. The outer diaphragms 18 and 19 are fixed by welding to the outer surface of the column member 2 which is a square steel pipe.
The first receiving member 17 is a vertical rib member fixed by welding between the upper and lower outer diaphragms 18 and 19.
The size of the column material (square steel pipe) 2 in the example is □ 12 × 400 × 400 (unit mm), and the size of the beam material (H shape steel) 3 is H600 × 200 × 12 × 9 (unit mm).
Further, the distance L from the mounting position of the above-mentioned cane-shaped joining element 15 to the beam member 3 (position on the center line in the width direction of the vertical plate portion 21 of the cane-shaped joining element 15) to the side surface of the column member 2 is 1000 mm. It is.
The lower flange 3b of the beam member 3 from the mounting position (the position on the center line in the width direction of the vertical plate portion 21 of the cane-shaped joining element 15) of the cane-shaped joining element 15 to the first receiving member 17 on the column member 2 side. The distance M to the lower surface is 600 mm.
The beam end joining element 4 in the present invention is basically a beam end joining element that acts on the beam material 3 and mainly resists axial force and shearing force (designed as a pin assumption type joining element).

As shown in FIGS. 1 to 5, the walking stick type joining element 15 includes a main body portion 21 that resists an axial force acting on the walking stick type joining element 15 and an axial force acting on the main body portion 21. The joint element buckling prevention member 22 has a rectangular cross section that is movably covered in the longitudinal direction of the main body so as not to burden the body.
As shown in FIGS. 2 and 3, the main body portion 21 is horizontally connected to the lower flange 3 a of the beam member 3 at the upper end of the vertical plate portion 21 a that resists the axial force acting on the main body portion 21. It is the structure which provided the board part 21b, and has the bolt hole 21c for joining to the said 1st receiving material 17 in a lower end part, and the bolt for bolting to the lower flange 3a of the beam material 3 in an upper end part It has a hole 21d.
At least the main body 21 is made of steel, and the cane-type joining element 15 has a vibration damping function, that is, a function as a cane-type joining element, due to the absorbed energy action of the vertical plate part 21a of the main body 21 made of steel. Can fulfill.
As shown in FIGS. 2, 4, and 5, the joining element buckling prevention member 22 includes side plates 22 a arranged on the left and right sides of the vertical plate portion 21 a of the main body portion 21, and left and right sides of the vertical plate portion 21 a. The side plate 22a and the spacing member 22b on both sides are fixed by tightening them with bolts 71 passing through the holes 22c and 22d opened in the side plate 22a and the spacing member 22b. It is a structure and has comprised the rectangular cylinder shape surrounding the vertical board part 21a.
The joining element buckling prevention member 22 acts to restrain the vertical surface portion 21a from both sides so that the vertical surface portion 21a does not buckle due to an axial force acting on the vertical surface portion 21a of the main body portion 21.

  As shown in FIGS. 2, 3, and 5, the horizontal plate portion 21 b of the main body portion 21 of the cane-shaped joining element 15 is fixed to the lower surface of the lower flange 3 a of the beam member 3 with bolts 72.

  As described above, the first receiving member 17 provided in the stiffening portion 16 of the column member 2 is a vertical rib-like member that is fixed by welding between the upper and lower outer diaphragms 18 and 19, as shown in FIG. The lower end of the vertical surface portion 21a of the main body portion 21 of the cane-shaped joining element 15 is opposed to the tip of the vertical rib-shaped first receiving member 17, and the attachment plate 30 is attached to both sides in the vicinity of the opposed portion. The connection 30, the vertical plate portion 21 a, and the first receiving member 17 are joined by bolts 73, respectively.

In the present invention, in order to improve the earthquake resistance, a lateral buckling prevention material 31 that resists a force in a horizontal direction perpendicular to the beam axis acting on the beam material 2 is provided in addition to the cane joint element 15. As shown in FIG. 7 (a), the lateral buckling prevention member 31 of the present invention has its upper end 31a attached to the end of the beam member of the lower flange 3a of the beam member 3 and the lower end 31b of the column member 2. It joins to the 2nd receiving material 18a provided in the said stiffening part 16 and higher than the said 1st receiving material 17. FIG. In this embodiment, the tip portion of the upper diaphragm 18 is used as the second receiving member 18a.
The lateral buckling prevention member 31 of the embodiment is a member having a Z-shaped cross section formed by bending a steel plate into a Z shape as shown in FIG. 7 (a), and bolt insertion holes at the upper end 31a and the lower end 31b, respectively. 31c is opened. The upper end portion 31 a is joined to the lower flange 3 a of the beam member 3 with a bolt 74, and the lower end portion 31 b is joined to the distal end portion of the upper diaphragm 18 with a bolt 75.

  The above-mentioned lateral buckling prevention material 31 has a Z-shaped cross-section, has high rigidity in the horizontal direction perpendicular to the beam axis, and can be easily deformed in the beam axis direction, so it is effective against twisting of the beam material. However, movement in the beam axis direction is allowed. Therefore, it is possible to effectively prevent lateral buckling in which the beam member 3 is twisted in the horizontal direction.

In the above-mentioned column beam connection structure, the lower end portions of the cane-shaped bonding element 15 and the lateral buckling prevention member 31 are not directly on the column member 2 which is a square steel pipe having a closed cross section, but the upper and lower outer diaphragms 18 of the column member 2. 19, it is necessary to use a special one-side bolt that can be joined only from one side because it is joined to the first receiving member 17 of the vertical rib shape provided on the stiffening portion 16 or the second receiving member 18 a of the horizontal plate shape. There is no, and it can join with the bolt of general construction on both sides.
Special one-side bolts are not required and can be installed with ordinary tools, so there is no inconvenience and workability is good.
Further, since it is not directly joined to the column material 2, it is not necessary to provide a bolt hole in the column material 2, and therefore there is no cross-sectional defect portion due to the bolt hole, so that the cross section of the column material 2 can be effectively utilized, and the economy It can be a pillar of typical design.
Further, as a structure in which the first receiving member for joining the lower end portion of the cane-shaped joining element is provided on the pillar material side, the column member stiffening portion 16 is configured by the upper and lower diaphragms 18 and 19 as in this embodiment. Then, two of the cane-type joining element 15 and the lateral buckling prevention material 31 can be easily joined to the column material side, and the structure in which both the cane-type joining element and the lateral buckling prevention material are joined to the column material side. Is quite appropriate.
In addition, it is structurally easy to join the lower end portion of the cane-shaped joining element to the vertical rib-shaped first receiving member 17 on the column member 2 side, and acts on the cane-shaped joining element 15. It is a structure that can transmit the axial force to the column member 2 side without difficulty, and is a very suitable structure as a first receiving member that joins the lower ends of the cane-shaped joining elements.

FIG. 10 shows another embodiment of the beam-column joint structure.
This column beam connection structure 1B is a column material 2 having a structure in which the column material 2 is stiffened in order to provide the first receiving material 27 for bonding the lower end portion of the cane-shaped connection element 15 on the column material 2 side. Inner diaphragms 28 and 29 are provided at two locations above and below. A stiffened side surface portion of the column member 2 to which the first receiving member 27 is joined is indicated by 26.
The first receiving member 27 for joining the lower ends of the cane-shaped joining elements 15 is composed of upper and lower horizontal plates 27a and 27b which are welded and fixed to the outer surfaces of the upper and lower inner diaphragms 28 and 29, and both horizontal plates. It consists of a vertical rib-like member 27c that is welded and fixed between 27a and 27b and fixed to the side surface of the column 2 by welding.
The inner diaphragms 28 and 29 are fixed to the inner surface of the column member 2 which is a square steel pipe by welding.
Then, the lower end of the vertical surface portion 21a of the main body portion 21 of the cane-shaped joining element 15 is opposed to the tip of the vertical rib-like member 27c of the first receiving member 27, and the attachment plates 30 are respectively provided from both sides in the vicinity of the facing portion. In addition, the attachment plate 30, the vertical plate portion 21a, and the vertical rib-like member 27c of the first receiving member 27 are joined by bolts 73, respectively.
In this embodiment, the horizontal plate 27a on the upper side of the first receiving member 27 is used as the second receiving member for joining the lower end portions of the lateral buckling preventing member 31 (second receiving member 27a). .
Other configurations are the same as those of the first embodiment, and detailed description thereof is omitted.

FIG. 11 shows still another embodiment of the column beam connection structure.
This column-beam joining structure 1C has a column material 2 as a structure for stiffening the column material 2 in order to provide the first receiving material 37 for joining the lower end portion of the cane-shaped joining element 15 on the column material 2 side. The diaphragms 38 and 39 are provided in two places above and below. A stiffened side surface portion of the column member 2 to which the first receiving member 37 is joined is indicated by 36.
The through diaphragms 38 and 39 are inserted between the cut column members 2 and fixed by welding to stiffen the column members 2. FIG. 11 (b) is a plan view of the column material 2 portion shown by omitting the column material 2 welded and fixed to the upper surface of the upper through diaphragm 38 (the HH arrow plane of the main part in FIG. 11 (a)). Figure).
A first receiving member 37 for joining the lower end portions of the cane-shaped joining element 15 is formed between two upper and lower horizontal plates 37a and 37b and both horizontal plates 37a and 37b which are welded and fixed to upper and lower through diaphragms 38 and 39, respectively. And a vertical rib-shaped member 37c fixed by welding.
Then, the lower end of the vertical surface portion 21a of the main body portion 21 of the cane-shaped joining element 15 is opposed to the tip of the vertical rib-like member 37c of the first receiving member 37, and the attachment plates 30 are respectively provided from both sides in the vicinity of the facing portion. In addition, the attachment plate 30, the vertical plate portion 21 a, and the vertical rib-like member 37 c of the first receiving member 37 are joined by bolts 73, respectively.
In this embodiment, a horizontal plate 37a above the first receiving member 37 is used as the second receiving member for joining the lower end portions of the lateral buckling preventing member 31 (second receiving member 37a). .
Other configurations are the same as those of the first embodiment, and detailed description thereof is omitted.

FIG. 12 shows still another embodiment of the column beam connection structure.
This column beam connection structure 1D is a column material 2 having a structure in which the column material 2 is stiffened in order to provide the first receiving material 27 on the column material 2 side for bonding the lower end portion of the cane-shaped connection element 15. The four vertical end edges 51c of the vertical stiffener 51 composed of vertical plate members 51a and 51b joined in a cross shape when viewed from above are welded and fixed to the inner surface of the column member 2. The vertical stiffener 51 in the illustrated example includes one wide plate member 51a passed between opposing inner surfaces of the column member 2, and two narrow plate members 51b and 51b fixed by welding at the center in the width direction of the plate member 51a. However, the vertical stiffener may be welded and joined by combining four narrow plates in a cross shape, and the manufacturing method thereof is arbitrary.
The first receiving member 57 for joining the lower end portions of the cane-shaped joining element 15 is composed of two upper and lower horizontal plates 57a and 57b which are welded and fixed to the side surfaces of the vertical stiffener 51 at the upper end position and the lower end position, respectively. And a vertical rib-like member 57c that is welded and fixed between the horizontal plates 57a and 57b and is fixed to the side surface of the column 2 by welding. A stiffened side surface portion of the column member 2 to which the vertical rib-like member 57c of the first receiving member 57 is welded is indicated by 56. In this case, the vertical rib-like member 57c of the first receiving member 57 is joined to the position of the wide plate member 51a of the vertical stiffener 51 inside the column member, and the vertical rib-like member of the first receiving member 57 The rigidity with respect to the load which acts on 57c can be ensured easily.
And the lower end of the vertical surface part 21a of the main body part 21 of the cane-shaped joining element 15 is made to oppose the front end of the vertical rib-like member 57c of the first receiving member 57, and the attachment plates 30 are respectively provided from both sides in the vicinity of the opposing part. In addition, the attachment plate 30, the vertical plate portion 21a, and the vertical rib-like member 57c of the first receiving member 57 are joined by bolts 73, respectively.
In this embodiment, the horizontal plate 57a on the upper side of the first receiving member 57 is used as the second receiving member for joining the lower end portions of the lateral buckling preventing member 31 (second receiving member 57a). .
Other configurations are the same as those of the first embodiment, and detailed description thereof is omitted.

FIG. 13 shows still another embodiment of the column beam connection structure.
This column beam connection structure 1E is a column material 2 having a structure in which the column material 2 is stiffened in order to provide the first receiving material 47 on the column material 2 side for bonding the lower end portion of the cane-shaped connection element 15. A short thick steel pipe 48 having substantially the same diameter and a thickness greater than the thickness of the column 2 is fixed by intermediate welding in the middle of the column 2 as a part of the column. A stiffened side surface portion of the column member 2 to which the first receiving member 47 is joined is indicated by 46.
The first receiving member 47 for joining the lower ends of the cane-shaped joining elements 15 is between two horizontal plates 47a and 47b and two horizontal plates 47a and 47b which are welded and fixed to the upper and lower portions of the thick steel pipe 48, respectively. And a vertical rib-like member 47c that is welded and fixed to the side surface of the column member 2.
Then, the lower end of the vertical surface portion 21a of the main body portion 21 of the cane-shaped joining element 15 is opposed to the tip of the vertical rib-like member 47c of the first receiving member 47, and the attachment plates 30 are respectively provided from both sides in the vicinity of the facing portion. In addition, the attachment plate 30, the vertical plate portion 21a, and the vertical rib-like member 47c of the first receiving member 47 are joined by bolts 73, respectively.
In this embodiment, a horizontal plate 47a on the upper side of the first receiving member 47 is used as the second receiving member for joining the lower end portions of the lateral buckling preventing member 31 (second receiving member 47a). .
Other configurations are the same as those of the first embodiment, and detailed description thereof is omitted.

FIG. 14 shows still another embodiment of the column beam connection structure.
The column beam connection structure 1F of this embodiment has the same structure as the column beam connection structure 1A of FIG. The structure in which the upper part of the end portion is joined to the column member 2 by the beam end joining element 4 that mainly resists axial force and shearing force acting on the beam member 3 is the same as the column beam joining structure 1A of FIG. It is. A re-explanation of these will be omitted.
In this column-beam joining structure 1F, the beam flange 3 is close to the side surface of the column 2 except for the lower flange 3a at the end of the beam 3 and the beam end joining element 4 at the top of the web 3c.
A groove-shaped cross-section member is used as the lateral buckling prevention material 31 ′, and the web 31 c ′ of the groove-shaped cross-section member is arranged facing the side surface of the column material 2, and the upper flange 31 a ′ is disposed on the column material 2. The lower flange 3a of the approaching beam member 3 is joined with a bolt 75, and the lower flange 31b 'is joined to the tip 18a of the upper outer diaphragm 18 which is the second receiving member 18a with a bolt 76. Yes.
The lateral buckling prevention member 31 ′ having the groove-shaped cross-section with the web 31 c ′ facing the side surface of the column member 2 has a length in the longitudinal direction of the beam axis by connecting the beam member 3 and the second receiving member 18 a substantially vertically. Therefore, a large restraining force against the torsion of the beam 3 can be exhibited.

In each of the above-described embodiments, a square steel pipe is used as a pillar material, but it can be applied to a pillar material of a round steel pipe.
Moreover, the column material made of a steel pipe may be used by filling concrete inside.
Further, the beam material is not limited to the H-shaped steel, and an I-shaped rope, a C-shaped rope, or the like can be adopted.
In addition, it is appropriate that the main body portion has a vertical plate portion as in the embodiment, but it is possible to adopt various cross-sectional shapes having rigidity in the horizontal direction perpendicular to the beam axis.
Further, the lateral buckling prevention material is not limited to the Z-shaped cross-section member and the groove-shaped cross-section member of the embodiment, and any material having sufficient rigidity in the horizontal direction perpendicular to the beam axis can be employed.

1A, 1B, 1C, 1D, 1E, 1F Column-to-beam joint structure 2 Column material 3 Beam material 3a Upper flange 3b Lower flange 3c Web 4 Beam end joint element 7 Outer diaphragm 8 Reinforcement rib 9, 10 Saddle plate 11, 13 Bolt 12 Attached plate 15 Cane-shaped joining element 16 Stiffening portion 17 of column material First receiving members 18, 19 Outer diaphragm 18a Second receiving member (tip of outer diaphragm)
21 Main body portion 21a Vertical plate portion 21b Horizontal flat plate portion 21c, 21d Bolt hole 22 Joining element buckling prevention member 22a Side plate 22b Spacing material 22c, 22d Hole 30 Attachment plate 71, 72, 73, 74, 75, 76 Bolt 31, 31 'Lateral buckling prevention material 31a, upper flange 31b (of lateral buckling prevention material) Upper flange 31b (lower side buckling prevention material) lower end 31b' Lower flange 31c Bolt insertion hole 31c 'Web 28, 29 Inside diaphragm 27 First receiving material 27a Horizontal flat plate (second receiving material)
27b Horizontal flat plate 27c Vertical rib-shaped member 37 First receiving members 38, 39 Through diaphragm 37 First receiving member 36 Side portions 37a, 37b horizontal plate 37c vertical rib-shaped member 46 Supplement of column material Rigid side surface 47 First receiving member 48 Thick steel pipe 47a Horizontal flat plate (second receiving member)
47b Horizontal flat plate 47c Vertical rib member 51 Vertical stiffener 51a Wide plate member 51b Narrow plate member 51c Vertical edge 57 First receiving member 57a Horizontal flat plate (second receiving member)
57b Horizontal plate 57c Vertical rib-shaped member

Claims (13)

A column beam connection structure in which a steel beam is attached to the side of a column made of a steel pipe,
The end of the beam is joined to the column with a beam end joint element that resists axial and shear forces acting on the beam, and a stiffening section is provided below the beam end joint element of the column. And
The stiffening portion includes a first receiving material and a second receiving material located above the first receiving material,
The upper end portion of the cane-shaped joining element is attached to a position away from the beam end in the lower flange of the beam member, and the lower end portion of the cane-shaped joining element is attached to the first receiving member,
An upper end portion of a lateral buckling prevention material is attached to the vicinity of a beam material end portion of the lower flange of the beam material, and a lower end portion of the lateral buckling prevention material is attached to a second receiving material. Column beam connection structure.   The said stiffening part of a pillar material is a column beam joint part stiffened by an outer diaphragm, an inner diaphragm, a through diaphragm, or a vertical stiffener provided at two places above and below the pillar material. 1. The beam-column joint structure according to 1.   The stiffening portion of the column member is an outer diaphragm provided at two upper and lower positions of the column member, and the first receiving member is a vertical rib-like member fixed between the upper and lower outer diaphragms. The beam-column joint structure according to claim 1, wherein   The stiffening portion of the column material is an inner diaphragm provided at two positions above and below the column material, and the first receiving material is a horizontal plate welded and fixed to the side surfaces of the upper and lower inner diaphragm positions in the column material, and 2. The column beam connection structure according to claim 1, comprising a vertical rib member fixed between upper and lower horizontal plates.   The stiffening portion of the column member is a through diaphragm provided at two positions above and below the column member, and the first receiving member includes a horizontal plate welded and fixed to the upper and lower through diaphragms of the column member and the upper and lower plates, respectively. 2. The beam-column joining structure according to claim 1, comprising a vertical rib-like member fixed between horizontal plates.   The stiffening portion of the column member is a column beam joint portion in which the inside of the column member is stiffened by a vertical stiffener, and the first receiving member is a column beam joint portion stiffened by the vertical stiffener in the column member. 2. The beam-column joining structure according to claim 1, comprising a horizontal plate welded and fixed to the side surfaces of the upper and lower positions, and a vertical rib-like member fixed between the upper and lower horizontal plates. The stiffening portion of the column material is a short thick steel pipe that is substantially welded and fixed in the middle of the column material as a part of the column, and is thicker than the thickness of the column material.
The first receiving member comprises a horizontal plate welded and fixed to two side surfaces of the thick steel pipe and a vertical rib-like member fixed between the upper and lower horizontal plates. 1. The beam-column joint structure according to 1.   The lateral buckling prevention material is a bent steel plate, has a horizontal plate portion in surface contact with the lower flange of the beam on the upper end side, and a horizontal plate portion in surface contact with the second receiving member in the form of a horizontal plate on the lower end side. The beam-column joint structure according to claim 1, comprising:   9. The beam-column joint structure according to claim 8, wherein the lateral buckling prevention material is a Z-shaped cross-section member.   9. The beam-column joining structure according to claim 8, wherein the lateral buckling prevention material is a groove-shaped cross-sectional member in which the web is disposed facing the side surface of the column material.   The said cane-type joining element is for joining to the lower flange of the beam material provided integrally with the vertical plate part which resists the axial force which acts on the said cane-type joining element, and the upper end of the said vertical plate part. It prevents the vertical plate part from buckling laterally due to the axial force acting on the main body part and the vertical plate part of the main body part, but does not bear the axial force acting on the vertical plate part. The beam-column joining structure according to any one of claims 1 to 10, comprising an attached joining element buckling prevention member.   The vertical plate portion of the main body portion of the cane-shaped joining element has a shape with a narrow plate width at the middle portion thereof, and the joining element buckling prevention member is a rectangle surrounding the narrow portion of the intermediate portion of the vertical plate portion. The column beam connection structure according to claim 11, which has a cylindrical cross-sectional shape.   The beam-column joining structure according to claim 1, wherein the cane-type joining element is the staff-joint joining element according to claim 11, and the first receiving material is the first receiving material according to any one of claims 3 to 7. In this case, the lower end of the vertical surface portion of the main body portion of the cane-shaped joining element and the front end of the first receiving member in the form of a vertical rib are made to face each other, and an attachment plate is attached from both sides in the vicinity of the facing portion. The beam-to-column connection structure is characterized in that the accessory plate, the vertical plate portion, and the vertical rib are each connected by a bolt.

Images