JP5134836B2 - H-shaped cross-section joint structure - Google Patents

Description

  The present invention relates to a joint structure for an H-shaped cross-section member, and more particularly, to a joint structure for an H-shaped cross-section member to which a web bending joint is used in which joints are omitted only at a web portion while omitting joints at upper and lower flange portions.

  Conventionally, many H-shaped cross-section members have been used as building members for building structures or civil structures. Conventionally, as shown in FIG. 15, the joint structure of the H-shaped cross-section member includes bolts 52 and nuts 53 in which attachment plates 51a, 51b and 51c are respectively attached to the upper and lower flanges 50a and 50b and the web 50c. In the case of this joint structure, the attachment plate 51a, the bolt 52, and the nut 53 protrude from the upper surface of the upper flange 50a. There were problems such as poor storage and poor design when placing a floor slab.

  Therefore, in recent years, a web bending joint structure has been proposed in which a member protruding from the outer surface of the upper and lower flanges is eliminated, a web is attached only to the web portion, and fastening is performed with bolts and nuts.

  For example, in Patent Document 1 shown below, as shown in FIG. 16, a shape steel 50 having upper and lower flanges 50 a and 50 b and a web 50 c, and an inner corner portion of the intersection of the flanges 50 a and 50 b and the web 50 c is round. Are joined to each other in a butted state, using a joining member 54 of a corner-cut steel plate whose height is equal to the internal dimension of the upper and lower flanges of the shape steel 50, and the joining member 54 is abutted between the upper and lower flanges 50a and 50b. A bolt is attached to the web 50c of the shape steel 50 in a state where the corner cut portions of the corner steel plate are in contact with the radius of the inner corner of the intersection of the flanges 50a, 50b and the web 50c. A joint structure structure of shape steel fixed by nuts 52 and 53 has been proposed.

  In Patent Document 2 below, as shown in FIG. 17, the end surfaces of the beam steel frame 56 are abutted except for the flange of the beam joint portion of the column steel frame 55 having a flat cross section, and both sides of the web of the column steel frame 55 and the beam steel frame 56 are placed on both sides. In addition, a web bending joint structure has been proposed in which a joining plate 57 having a height substantially equal to the web height of the beam steel frame 56 is bolted.

On the other hand, in recent years, aluminum alloys that are excellent in recyclability and workability have begun to attract attention as materials that play a role in comprehensive reduction of environmental burden. In June 2000, legislation that allowed aluminum alloys to be used in building structures was made in June 2000, and the number of applications to detached houses and low-rise buildings is increasing.
Japanese Patent No. 2990874 JP-A-7-252886

  In the case of the joint structure described in Patent Document 1 and Patent Document 2, the joint plate of the upper and lower flange portions is omitted, and the joint plate is disposed only on the web, so that the design is more than the conventional joint structure. Although it will be excellent, especially in the case of a dome-type frame structure in which the frame can be seen from the outside or a roof structure such as a skeleton structure, the attachment plate disposed on the web impairs the design. There were problems such as. Also, in the case of a joint structure with a web attached to the outer surface of the web, it will be exposed to the environment of rainwater or air / rainwater containing high salinity, and it will be exposed to the gap (interface) between the web and the profile. There was a problem that rainwater was collected and rust was easily generated.

  The web bending joint secures the yield strength against the bending moment and the shearing force only by the web joint, and it is desired to further improve the bending strength.

  Therefore, a main problem of the present invention is to provide a joint structure of an H-shaped cross-section member that can improve the design property by making the web attachment member invisible from the outside and can improve the bending strength of the joint portion. is there.

In order to solve the above-mentioned problems, the present invention according to claim 1 is directed to a beam member that is subjected to bending and shearing forces. The upper flange, the lower flange, and the upper and lower flanges are connected, and a predetermined distance is provided. A joint structure for joining hollow H-shaped cross-section members in which one or two hollow portions are formed vertically with two or three webs arranged in a butted state,
A joint member having a cross-sectional dimension substantially matching the shape of the hollow portion is brought in, and the right half portion thereof is inserted into the hollow portion of the hollow H-shaped cross-sectional member on one side, while the left half portion is hollow H-shaped cross-section on the other side. One or more inserted into the hollow part of the member and provided through the two or three webs and the joint member from the outer surface side of the hollow H-shaped cross-section member in each of the right half part and the left half part a bolt, the side surface of the bolt or fastening by screwed so nut, said signed by two or three webs and rivets provided through said coupling member, and the web side and the joint member Each of the contact surfaces is provided with a plurality of protrusions and recesses in engagement with each other in a sliding contact state along the longitudinal direction of the member.

In the invention of claim 1 above, regarding the H-shaped cross-section member used as a beam member on which bending and shearing force acts , the web has a hollow cross-sectional shape, and a joint member inserted across these hollow portions; Fastening is achieved by bolts / nuts or rivets provided through the web and the joint member. Therefore, it is possible to improve the design by making the joint member invisible from the outside. Moreover, since it is the structure which made the web 2 sheets or 3 sheets, since the total thickness of a web can be ensured from the conventional thing, the improvement in bending strength can be aimed at. Furthermore, since the joint member has a structure that is not exposed to the outside, the joint member is not exposed to rainwater, salt-containing air, salt-containing rainwater, and the like, and there is an advantage that generation of rust can be prevented.

In addition, by providing a plurality of concavo-convex in sliding contact with each other along the longitudinal direction of the member on the contact surface between the side surface of the web and the side surface of the joint member , the insulator reaction force is dispersed, By preventing local breakage, bending and shearing forces can be transmitted smoothly, and the bending strength can be improved. Further, the engagement of the concave and convex portions can prevent the slip generated at the joint surface and prevent the hollow H-shaped cross-section member from being bent at the joint portion.

  According to a second aspect of the present invention, there is provided the joint structure of the H-shaped cross-sectional member according to the first aspect, wherein the material of the hollow H-shaped cross-sectional member is steel or an aluminum alloy. The joint structure according to the present invention can be applied to a hollow H-shaped cross-section member made of steel or aluminum alloy. However, it is particularly suitable for the joint structure of an H-shaped cross-section member made of an aluminum alloy, in which the bearing strength of the web body is lower than that of a steel material.

  According to a third aspect of the present invention, the joint member comprises a plate-shaped joint member divided into a plurality of parts along a vertical plane along the longitudinal direction of the member. A structure is provided.

  As a fourth aspect of the present invention, a thin plate member is inserted in a gap between the joint member and the upper flange and / or the lower flange so as to straddle between the hollow H-shaped cross-section members. A joint structure for an H-shaped cross-section member according to any one of the above is provided.

  The invention according to claim 4 eliminates the gap by inserting a thin plate member so as to straddle between the hollow H-shaped cross-section members in the gap between the joint member and the upper flange and / or the lower flange. It is intended to enhance bending and shear strength. Further, by filling the gap between the upper and lower portions, it is possible to suppress the slip generated on the joint surface and prevent the hollow H-shaped cross-section member from increasing in deformation angle due to corner bending.

  The present invention according to claim 5 is the H-shape according to any one of claims 1 to 4, wherein each of the cross sections is determined so as to approximate a section modulus or a plastic section modulus of the hollow H-shaped section member and the joint member. A joint structure for a cross-sectional member is provided.

  In the invention of claim 5, the bending modulus of the joint plate is equal to the bending strength of the H-shaped cross-section beam so as to approximate the section modulus or plastic section modulus of the hollow H-shaped cross-section member and the joint member. Although it is desirable to have the above, even if the bending strength of the joint plate is small, it can be transmitted as an increase in the plastic bending strength of the joint plate and the support pressure between the joint plate and the H-shaped flange and between the H-shaped flanges. Each cross section is determined. The hollow H-shaped cross-section member and the joint member reach the elastic stress limit or the plastic stress limit state almost simultaneously, thereby eliminating the waste of the cross-section of the member and allowing economical design.

  As described above, according to the present invention, it is possible to improve the design property by concealing the web attachment member so as not to be seen from the outside, and to improve the bending strength of the joint portion.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First embodiment]
FIG. 1 is a side view of a joint structure according to the present invention, and FIG. 2 is a cross-sectional view taken along the line II-II in FIG.

  As shown in FIGS. 1 and 2, the joint structure has an upper flange 1a, a lower flange 1b, and two upper and lower flanges 1a and 1b, and two webs 1c and 1d arranged at a distance from each other. This is a joint structure for joining the hollow H-shaped cross-section members 1, 1 in which the vertically long hollow portions 1e are formed in a butted state.

  That is, the joint member 2 having a cross-sectional dimension substantially matching the shape of the hollow portion 1e is brought in, and the right half portion thereof is inserted into the hollow portion 1e of the hollow H-shaped cross-section member 1 on one side, while the left half portion is placed on the other side. Is inserted into the hollow portion 1e of the hollow H-shaped cross-sectional member 1 on the side, and the two webs 1c, 1d and the joints are inserted from the outer surface side of the hollow H-shaped cross-sectional member 1, 1 in the right half portion and the left half portion, respectively. .. Are fastened by one or a plurality of bolts 3, 3... Provided through the member 2 and nuts 4, 4. Although the cross section of the hollow part 1e and the joint member 2 is a complete rectangular cross section, it is preferable that the corners of the four corners be curved (R surface) as in the second and third embodiments described later.

  The hollow H-shaped cross-section member 1 can be a steel material or a shape made of an aluminum alloy. The joint member 2 having a rectangular cross section may be a member manufactured from an aluminum alloy as well as a steel material. As the bolt 3 and the nut 4, it is desirable to use a high strength bolt for friction joining, but an aluminum material such as an aluminum high tension bolt can also be used.

  The width dimension B of the joint member 2 is approximately 20 to 100 mm, preferably about 20 to 60 mm, and the height dimension is desirably a dimension that matches the height of the hollow portion of the hollow H-shaped cross section. In addition, although it is desirable to use a solid member as the joint member 2, it is also possible to use a hollow rectangular cross-section member in some cases.

  It is desirable that the hollow portion 1e of the hollow H-shaped cross-sectional member 1 and the cross-sectional dimension of the joint member 2 have a dimensional difference that allows insertion while sliding the joint member 2 without leaving a gap. Some degree of dimensional difference is necessary from the point of accuracy. This dimensional difference is desirably 1 mm to 3 mm, preferably 1 mm to 2 mm, and more preferably 1 mm or less, particularly in the longitudinal direction (gap size). It is desirable to make the gap dimension as small as possible. In particular, in the case of an aluminum alloy, the manufacturing accuracy is easy in terms of formability, and the gap size can be easily reduced. Regarding the lateral dimension difference, it is desirable that the gap between the side surfaces of the webs 1c and 1d and the side surface of the joint member 2 is within 2 mm, preferably within 1 mm.

  The hollow H-shaped cross-section members 1 and 1 are preferably used as beam members. When subjected to an action force such as bending and shearing, the hollow H-shaped cross-section members 1 and 1 are initially subjected to bending and shearing by joining with bolts 3 and nuts 4. After that, after the acting force increases and the joint surface by the bolt 3 and the nut 4 slips, the butted surfaces of the upper flanges 1a and 1a come into contact with each other as shown in FIG. In addition, when the lower surface of the joint member 2 is in contact with the lower surface of the hollow portion 1e (marked with a ▽), bending and shearing force can be transmitted as an insulator action.

[Second embodiment]
Next, a second embodiment of the present invention will be described in detail with reference to FIGS.

In the second embodiment, the contact surfaces between the side surfaces of the webs 1c and 1d and the side surface of the joint member 2 are each provided with a plurality of protrusions and recesses 1f and 2d that are engaged with each other along the longitudinal direction of the member. Is.

  As described above, when the hollow H-shaped cross-section members 1 and 1 are subjected to an acting force such as bending and shearing, the joint surface by the bolt 3 and the nut 4 slips if the frictional joint strength exceeds the allowable value. However, in the second embodiment, by providing the unevenness, the slip reaction at the joint surface can occur and the insulator reaction force can be dispersed by the engagement of the unevenness, resulting in local destruction. Can be transmitted smoothly.

  In the illustrated example, the joint member 2 includes plate-shaped joint members 2a to 2c divided into four on a vertical plane along the longitudinal direction of the member, as shown in FIG. Among these joint members 2a to 2c, the outer surfaces of the side joint members 2a and 2c are provided with a plurality of projections and recesses 2d along the longitudinal direction of the member.

  On the other hand, on the inner surface side of the webs 1c and 1d, a plurality of projections and recesses 1f that engage with the projections and recesses 2d are provided along the longitudinal direction of the member, and the joint member 2 is hollow as shown in FIG. In a state of being inserted into the portion 1e, the concave and convex portions 2d provided on the joint member 2 and the concave and convex portions 1f provided on the webs 1c and 1d are engaged so as to mesh with each other. The unevennesses 2d and 1f have a shape in which unevenness of a predetermined width is alternately arranged in the height direction as shown in the figure.

  Since the insulator reaction force can be dispersed by the uneven engagement between the unevenness 2d of the joint member 2 and the unevenness 1f of the webs 1c, 1d, it is difficult to cause local breakage, and resistance to bending and shearing is greatly improved. Therefore, the number of bolts and nuts can be significantly reduced as compared with the first embodiment.

  In the joint structure, it is desirable to determine the respective cross sections so as to approximate the section modulus or the plastic section modulus between the hollow H-shaped section member 1 and the joint member 2. By determining the cross section so that the hollow H-shaped cross-section member 1 and the joint member 2 have the same stress in the elastic limit state or the plastic limit state in a state where the member is subjected to bending and shearing force, The cross section is not wasted and it becomes economical.

  By the way, in the said form example, although the joint member 2 was divided into 4 by the vertical surface along a member longitudinal direction, as shown to FIG. 7 (A), it divides into 2 on the vertical surface along a member longitudinal direction, FIG. As shown in (B), a single cross section is also possible. That is, it can be an arbitrary dividing surface.

[Third embodiment]
Next, the third embodiment shown in FIGS. 8 to 10 is engaged with the contact surfaces of the webs 1c, 1d and the joint member 2 along the longitudinal direction of the members, similarly to the second embodiment. In this embodiment, the uneven shapes of the uneven portions 1f and 2d are formed in a sawtooth shape (zigzag wave shape). Since the other structure is the same as that of the second embodiment, the same reference numerals are given and description thereof is omitted.

[Fourth embodiment]
Further, in the fourth embodiment shown in FIGS. 11 to 13, the gap between the joint member 2 and the upper flange 1 a and / or the lower flange 1 b is straddled between the hollow H-shaped cross-section members 1 and 1. The thin plate member 5 is inserted.

  As described above, the hollow portion 1e of the hollow H-shaped cross-section member 1 and the cross-sectional dimension of the joint member 2 have a dimensional difference that can be inserted while sliding the joint member 2 without leaving a gap. However, a certain dimensional difference is necessary from the viewpoint of manufacturing accuracy. When this gap is subjected to bending or shearing force that exceeds the allowable value of frictional joint strength, it causes slipping on the joint surface and causes the joint part to be bent at a corner, but this slipping and corner bending phenomenon is not generated as much as possible. Since the coupling member 2 is inserted into the hollow H-shaped cross-section members 1 and 1, the thin plate member 5 is hollow H-shaped in order to fill a gap between the coupling member 2 and the upper flange 1a and / or the lower flange 1b. It inserts so that it may straddle between cross-section members 1 and 1. As the thin plate member 5, it is desirable to use the same kind of aluminum material or steel material as the joint member 2 in terms of strength.

  Note that the insertion and installation of the thin plate member 5 can be combined with the joint structure according to the second embodiment or the third embodiment.

[Fifth embodiment]
Next, the joint structure of the H-shaped cross-section member 1 ′ according to the fifth embodiment of the present invention will be described with reference to FIG.

  As shown in FIG. 13, the H-shaped cross-section member 1 ′ according to the fifth embodiment connects the upper flange 1a, the lower flange 1b, and the upper and lower flanges 1a and 1b, and is arranged with a predetermined distance therebetween. The three webs 1c to 1e are provided with a cross-sectional member in which two hollow portions 1f and 1g are formed in a vertically long shape. In this case as well, as in the first to fourth embodiments, The joint members 2 and 2 having a cross-sectional dimension substantially matching the shape of the portions 1f and 1g are brought in, and the right half portion thereof is inserted into the hollow portions 1f and 1g of the hollow H-shaped cross-section member 1 ′ on one side, and the left half The portion is inserted into the hollow portions 1f and 1g of the hollow H-shaped cross-section member 1 'on the other side, and passes through the three webs 1c to 1e and the joint members 2 and 2 from the outer surface side of the hollow H-shaped cross-sectional member 1'. And a plurality of bolts 3, 3. 3,3 ... achieve fastened by a nut 4, 4 ... that was screwed into.

[Other examples]
(1) Although the embodiment in which the hollow H-shaped cross-section members 1 and 1 are linearly joined has been shown in the above embodiment, the members can be joined in a curved or bent shape. For example, FIG. 14 (A) is a side view when the hollow H-shaped cross-section members 1 and 1 are joined in a shape that curves downward, and FIG. 14 (B) is a hollow H-shaped cross-section that curves in the upward direction. FIG. 14C is a side view when the members 1 and 1 are joined together, and FIG. 14C is a side view when the hollow H-shaped cross-section members 1 and 1 are joined together in a double-sided gradient.
(2) Instead of fastening by the bolt 3 and nut 4, the fastening may be performed by rivets (strike joint).

It is a side view of the joint structure concerning the 1st example of the present invention. It is the II-II arrow directional view of FIG. It is a schematic diagram which shows the bending resistance state of this joint structure. It is a perspective view which shows the joint structure which concerns on a 2nd form example. The joint structure is shown, (A) is a side view, (B) is a view taken along line BB, and (C) is a cross-sectional view. The joint member 2 is shown, (A) is a side view and (B) is a front view. (A), (B) is a joint part cross-sectional view which shows the other examples of the coupling member 2. FIG. It is a perspective view which shows the joint structure which concerns on a 3rd form example. The joint structure is shown, (A) is a side view, (B) is a view taken along line BB, and (C) is a cross-sectional view. The joint member 2 is shown, (A) is a side view and (B) is a front view. It is a perspective view which shows the joint structure which concerns on a 4th form example. The joint structure is shown, (A) is a side view, (B) is a view taken along line BB, and (C) is a cross-sectional view. The joint structure of the H-shaped cross-section member 1 ′ according to the fifth embodiment of the present invention is shown, (A) is a side view, and (B) is a cross-sectional view. (A)-(C) is a side view which shows the other joining shape of the hollow H-shaped cross-section members 1 and 1, respectively. It is a side view which shows the joint structure (the 1) of the conventional H-shaped cross-section member. A conventional joint structure (part 2) of an H-shaped cross-section member is shown, (A) is a side view, and (B) is a cross-sectional view. A conventional joint structure of an H-shaped cross-section member (part 3) is shown, (A) is a side view, and (B) is a cross-sectional view.

  1 '1 ... hollow H-shaped cross-section member, 2 ... joint member, 3 ... bolt, 4 ... nut, 5 ... thin plate member

Claims (5)

For a beam member that is subjected to bending and shearing forces, the upper flange, the lower flange, and two or three webs that connect the upper and lower flanges and that are spaced apart from each other by a predetermined distance are provided. A joint structure for joining hollow H-shaped cross-section members formed with two hollow portions in a butted state,
A joint member having a cross-sectional dimension substantially matching the shape of the hollow portion is brought in, and the right half portion thereof is inserted into the hollow portion of the hollow H-shaped cross-sectional member on one side, while the left half portion is hollow H-shaped cross-section on the other side. One or more inserted into the hollow part of the member and provided through the two or three webs and the joint member from the outer surface side of the hollow H-shaped cross-section member in each of the right half part and the left half part a bolt, the side surface of the bolt or fastening by screwed so nut, said signed by two or three webs and rivets provided through said coupling member, and the web side and the joint member A joint structure for an H-shaped cross-section member, in which a plurality of protrusions and recesses that are engaged with each other in a sliding contact state are provided along the longitudinal direction of the member.   The joint structure for an H-shaped cross-section member according to claim 1, wherein a material of the hollow H-shaped cross-section member is steel or an aluminum alloy.   The joint structure for an H-shaped cross-section member according to any one of claims 1 and 2, wherein the joint member is composed of a plate-shaped joint member divided into a plurality of parts along a vertical plane along the longitudinal direction of the member.   The H-shaped cross-section member according to any one of claims 1 to 3, wherein a thin plate member is inserted in a gap between the joint member and the upper flange and / or the lower flange so as to straddle between the hollow H-shaped cross-section members. Joint structure.   The joint structure of the H-shaped cross-section member according to any one of claims 1 to 4, wherein each cross-section is determined so as to approximate a section modulus or a plastic section modulus between the hollow H-shaped cross-section member and the joint member.

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