JP3041116U - Joint structure of steel structure - Google Patents

Abstract

(57) [Abstract] [Problem] Conventionally, in a joint structure of a steel frame structure, a joint portion is welded at a position about 2.5 cm away from an end portion of a prism. For this reason, the stress concentration exerted on the bracket by the welded portion affects the prism as well, and there is a problem in terms of reliability. In the present invention, a lower prism, a lower through-diaphragm, a square core portion, an upper diaphragm and an upper prism are respectively welded in their four surroundings, and reinforcing plates contacting three locations of the lower diaphragm, the square core portion and the upper diaphragm are provided. Since the beam is made of H steel and fixed at the tip with bolts and nuts through the attachment plate, the joint becomes 2.5 cm or more, farther than the prism,
It was possible to prevent the stress concentration on the building and to obtain the strength of the entire building. In addition, we were able to realize work safety and shorten the construction period.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a joint structure between a prism and a beam of a steel frame structure.

[0002]

[Prior art]

 Conventionally, in a steel frame structure, a diaphragm is joined to a required position of a prism and a joint bracket is joined to the diaphragm so that the end of the prism is projected by about 80 cm to 100 cm. The connections between the prism and the diaphragm and between the diaphragm and the joint bracket were all fixed by welding. Moreover, the distance between the end of the prism and the end of the upper and lower through diaphragms is as short as approximately 2.5 cm, and the welded part of the prism and this end of the upper and lower through diaphragms and the flange of the joint bracket are connected. The structure was welded in a very close position.

Therefore, it is easy to concentrate stress on the surface of the upper and lower through-diaphragms where the prismatic ends of the upper and lower through-diaphragms are welded to the end bracket, or at the cross section of the diaphragm, which may cause deformation. Sinks etc. occurred and the stress distribution became complicated. For this reason, excessive deformation in the vicinity of the joint tends to induce secondary stress, which leads to a decrease in proof strength and safety, and adversely affects the proof strength and rigidity of the entire structure. became.

The structure of a conventional joint will be described below with reference to the drawings. FIG. 11 is a side view of the conventional method, and FIG. 12 is a plan view of FIG. Then, FIG. 13 is a partially enlarged side sectional view showing a state in which the through diaphragm is welded and fixed.

In FIG. 10, 31 is a prism, 32 is a lower diaphragm that penetrates the entire upper surface of the prism 31, and 33 is welded to the four surroundings of the prism. Reference numeral 34 indicates a groove portion of the welded portion of the prism. Reference numeral 35 denotes a prism core portion, which has the same outer diameter dimension as that of the prism 31, and 36 is a groove portion for welding the prism core portion 35 and the lower diaphragm 32. Further, 38 is an upper diaphragm, 39 is a groove portion of a prism core portion 35 made for welding the prism core portion 35 and the upper diaphragm 38, and 40 is a welded portion thereof. Similarly, 41 is an upper prism, 42 is a groove formed in the upper prism 41, and 43 is a welded portion for welding the upper surface of the upper diaphragm 38 and the upper prism 41.

Next, the height from the lower surface of the lower diaphragm 32, that is, the welded portion 33 with the lower prism 31 to the welded portion 43 on the upper surface of the upper diaphragm 38 including the prism core portion 35 is made of H steel. The height of the portion 44 is the same as that of the portion 44, and the groove portion 45 at the lower portion of the joint portion 44 is a weld portion with the lower diaphragm 32. Further, 47 is an upper groove portion of the connection 44, and 48 is a welded portion with the upper diaphragm 38. Next, numeral 49 indicates a welded portion of the prismatic core portion 35 and the joint portion 44. In addition, the end face of the prismatic core portion 35, that is, the dimension from the end face of the prismatic core portion 35 to the end portion 50 of the joint portion is generally about 1 m from 80 cm.

Generally, the welding operation up to this point, that is, the step of welding the lower diaphragm 32, the prism core portion 35, the upper diaphragm 38, and the joint portion 44 to the prism 31 is performed in the factory. Then, in the steel frame building on the multi-story floor, welding work will be performed on-site. The connection portion 44 is made of the same material as the beam made of H steel. And 58 is a scallop part.

Next, the prism 31 welded to the connecting portion 44 is assembled on site. That is, 51 is a beam made of H steel, 52 is an upper support plate, 53 is a lower support plate, and 54 is a side support plate. Is assembled with a plurality of bolts 55, nuts 56 and washers 57 in a sandwich form.

FIG. 12 shows a plan view of FIG. 11 and is a stud. The lower through-diaphragm 32 and the upper through-diaphragm 38 located on the upper surfaces of the prism 31 and the prism core portion 35 have the same size and the same direction in the same direction as the surrounding portions 33, 37, 40, 43 of the prism 31 and the prism core portion 35. The joint portion 44 is welded to the upper diaphragm 48, the lower diaphragm 46, and the prism core portion 49.

Further, FIG. 13 shows another conventional example, in which 32 is a through diaphragm, which is welded and fixed around the prism 31 at 34, and since the welded portion 49 is close to the prism 35 on the diaphragm 32, However, although the structure is simplified, the man-hours of welding work are improved and the structure is not necessarily preferable in terms of strength. In addition, 58 is a scallop.

[0011]

[Problems to be solved by the device]

 As mentioned above, it is necessary to provide joints in two directions for prisms of steel-framed constructions and three or four directions for studs. The upper diaphragm, lower diaphragm, as well as the attachments of the joints are all fixed by welding. To be done. As described above, this welding causes a stress change in the member and causes distortion, resulting in strength problems.

In relation to the prism, the joint, and the beam, the tip of the joint with respect to the center of the prism, that is, the portion fixed by the bolt and the nut via the beam and the attachment plate is the prism and the joint. Since the proof stress applied to the welded part from a position about 100 cm from the welded part of the part also became large, the welding strength had to be increased.

Further, since the work of welding the joint portion to the prism is performed in the factory, it is necessary to transport the joint portion to the construction site by a truck or the like. In this case, since the joint portion protrudes from the prism, There were also problems that the cargo was restricted and the handling of the product was unstable and dangerous.

[0014]

[Means for Solving the Problems]

 That is, the prism, the lower diaphragm, the prism core, and the upper diaphragm are welded and fixed to the four surroundings of the prism, respectively, and at the portions corresponding to the wave of the beam made of H steel, between the upper diaphragm, the prism, and the lower diaphragm. Insert and weld a reinforcing plate having the same thickness as the required H steel wave plate to. Then, the upper and lower diaphragms and the beam made of H steel are joined with bolts, nuts and washers through the attachment plate.

[0015]

[Embodiment of the invention]

 Since the present invention does not weld the diaphragm in the vicinity of the conventional prism, stress concentration applied to the prism can be relaxed and strength and yield strength can be increased.

[0016]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the drawings. 1 is a perspective view showing a joining structure according to the present invention, FIG. 2 is a side view of FIG. 1, and FIG. 3 is an example of a plan view of FIG. FIG. 4 is an enlarged sectional view showing the side surface of the through diaphragm. 5 is a plan view showing the shapes of the upper and lower diaphragms, FIG. 6 and FIG. 7 are other embodiments of FIG. 4, and FIGS. 8, 9 and 10 are respectively FIG. 5, FIG. 6 and FIG. It shows another shape of the upper and lower diaphragms.

In FIG. 1, 1 is a lower prism, 2 is a lower diaphragm having a required shape, 3 is a prism core portion having the same dimensions as the lower prism 1, 4 is an upper diaphragm, a lower diaphragm 2 and a plate thickness and The appearance is the same. Further, 5 is an upper prism. The lower diaphragm 2 and the upper diaphragm 4 are through diaphragms between the lower prism 1 and the prism core 3 and the prism core 3 and the upper prism 5, and the diaphragm is calculated according to the strength of the building. A steel plate with the required thickness. Further, when the lower prism 1 is the nth floor, the upper prism 5 shows the (n + 1) th floor. In this case, n is -n, ...- 2, -1,1,2,3, ... It shows the n, n + 1 floor.

In FIG. 2, 6 is a joint between the lower prism 1 and the lower diaphragm 2, which is a groove provided in the lower prism, and 7 is the prism core portion 3 and the rectangular core portion 3 of the lower diaphragm 2. The groove portion 8 provided at the groove portion 8 is a groove portion provided at the other cut portion of the prismatic core portion 3 and is joined to the upper diaphragm 4. Further, 9 is a groove portion provided on the upper prism, and is joined to the upper diaphragm 4. Further, the dimension from the lower surface of the lower diaphragm 2, that is, the joint surface with the prism 1 and the upper surface of the upper diaphragm through the prism core portion 3, that is, the joint surface with the upper prism 5, is the same as the height of the beam used. They are the same. Further, a reinforcing plate 10 surrounded by the lower diaphragm 2, the prismatic core portion 3 and the upper diaphragm, and having a thickness of the wave portion at a position corresponding to the wave portion of the beam by the width up to the ends of the upper and lower diaphragms is provided. It is joined on both sides. At this time, according to the method of the present invention, it is not necessary to insert a scallop in the reinforcing plate, so that the strength of the diaphragm against the prism is increased.

Reference numeral 11 denotes a lower portion, and upper diaphragms 2 and 4 are connected to the beam with bolts and nuts. Further, 13 is an attachment plate for fixing the wave portion of the beam and the reinforcing plate with bolts and nuts. The lower and upper diaphragms and the beams are fixed by connecting them with bolts and nuts, and then the lower and upper diaphragms 2 and 4 and the supporting plates 11 and 12, and the flange portion of the beam or the reinforcing plate 10 and the wave portion of the beam may be welded at the attachment plate 13 portion.

FIG. 3 is a partially enlarged plan sectional view of FIG. 2, showing a state diagram of a stud with beams extending in three directions. A reinforcing plate 10 is provided corresponding to the beam made of H steel with respect to the rectangular core 3, and a bolt is provided between an end portion 14 of the reinforcing plate 10 and the beam made of H steel via a support plate 13. It is designed to be joined and fixed with nuts.

FIG. 4 is an enlarged cross-sectional side view of the through diaphragm. The reinforcing plate 10 is welded to the lower surface of the upper diaphragm 4, the prismatic core portion 3 and the upper surface of the lower diaphragm (not shown) at 24 and 25, respectively. There is.

Next, FIGS. 5, 6 and 7 show the shapes of the lower and upper diaphragms 2 and 4, respectively. FIG. 5 shows the case where beams made of H steel are connected in two directions, and FIG. 15 is a case where beams made of H steel are connected in three directions, and FIG. 7 is a case where beams made of H steel are connected in four directions at the central column 16.

In addition, FIG. 8, FIG. 9, and FIG. 10 show the lower and upper diaphragms in the state where the beams of H steel in FIG. 5, FIG. 6, and FIG. 7 are connected in two directions, three directions, and four directions, respectively. In the drawing showing the embodiment of the above, the case of 2 directions is 17 and 18 is of 3 directions, and 19 is of 4 directions, and it goes without saying that the lower and upper diaphragms may have other shapes. For example, the shapes of the diaphragms in FIGS. 8, 9 and 10 are 20,21.22 and the like. However, the width W of the connecting part of the beam made of H steel is the same as or larger than the width of the beam, and the size from the prism core to the lower part and the end of the upper diaphragm is 40 cm or less at the maximum. .

Although the lower and upper diaphragms are through diaphragms, for example, even if a diaphragm with a hollow inside the prism is welded, the through diaphragm of the present invention will be deteriorated in strength and proof stress, but it will be implemented. Sometimes.

According to the present invention, the lower and upper diaphragm ends are fixed by bolts, nuts and washers through a beam made of H steel and a support plate at a position 40 cm or less from the end of the prism. Compared with the one using the mouth bracket, the position fixed with bolts and nuts is about 80 cm to 100 cm, but in the present invention, it becomes shorter and the proof stress applied to the prism is improved. Further, unlike the conventional case, since the joint portion is not welded near the prism, stress concentration on the prism is eliminated.

In addition, the welding requiring a high level of technology in the method according to the present invention is significantly reduced as compared with the conventional method, and the overall reliability as a building is improved. In addition, the number of man-hours such as beveling, scalloping, and backing of sheet metal for welding the joints to the conventional method will be reduced, which contributes to shortening the working time and shortening the construction period.

Further, in contrast to the conventional length of the joint portion of 80 cm to 100 cm, the maximum length of the present invention is 40 cm or less, so that the transportation cost can be reduced and the safety of handling work can be remarkably improved.

[0028]

[Effect of the invention]

 According to the present invention, in comparison with the conventional method, the reinforcing plate is welded to the through diaphragm, and the beam made of H steel is directly joined and fixed with bolts and nuts to improve the overall reliability of the building. Can be done. In addition, stress concentration due to welding the joint to the diaphragm in the vicinity of the prism is eliminated, and scalloping of the reinforcing plate is not necessary, so that both strength and proof stress can be improved. Moreover, the construction method according to the present invention can significantly reduce the production cost such as workability and transportation cost, which can contribute to the reduction of the steel frame construction cost.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a joining structure according to the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a plan view of FIG. 1;

FIG. 4 is an enlarged sectional view of a side surface of a through diaphragm.

FIG. 5 is a plan view showing the shape of a diaphragm.

FIG. 6 shows another embodiment of FIG.

FIG. 7 shows another embodiment of FIG.

FIG. 8 shows another embodiment of FIG.

FIG. 9 shows another embodiment of FIG.

10 shows another embodiment of FIG.

FIG. 11 is a plan view of a conventional method.

FIG. 12 is a side view of a conventional method.

FIG. 13 is a partially enlarged side sectional view of a conventional method.

[Explanation of symbols]

 1 Lower Prism 2 Lower Diaphragm 3 Prismatic Core 4 Upper Diaphragm 5 Upper Prism 6 Groove 7 Groove 8 Groove 9 Groove 10 Reinforcing Plate 11 Upper Plate 12 Lower Plate 13 Side Plate 14 End 15 Stud 16 central pillar 17 two-way diaphragm 18 three-way diaphragm 19 four-way diaphragm 20 17 other example 21 18 other example 22 19 other example 23 beam 31 prism 32 lower diaphragm 33 33 prism welding Part 34 Prism groove part 35 Prismatic core part 36 Prism core part lower groove 37 Welding part 38 Upper diaphragm 39 Prism core part upper groove 40 Prismatic core part upper welding part 41 Prism 42 lower opening part Tip portion 43 Welding portion 44 Joint portion 45 Lower joint groove portion 46 Welding portion 47 Upper joint groove portion 48 Contact part 49 Welded part 50 Joint part tip part 51 Beam 52 Upper part support plate 53 Lower part support plate 54 Side support plate 55 Bolt 56 Nut 57 Washer 58 Scallop W Beam flange width L Distance from prism end to diaphragm tip l Square column Dimension from the edge to the edge of the reinforcing plate

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location F16B 7/04 301 F16B 7/04 301C

Claims (2)

[Utility model registration claims] 1. A structure of a connecting portion such as a square column of a steel structure and a beam made of H steel in a girder direction or a span direction, a stud, or a central column and a beam connecting them, which has a predetermined height. A lower through diaphragm with a pentagonal shape, a hexagonal shape, an octagonal shape having a required thickness at a position of a lower prism, or a different shape corresponding to a beam made of H steel, and a rectangular core portion and an upper through diaphragm above the rectangular core portion. The upper prism and the upper prism are welded in the surroundings of the prism, and the dimensions of the lower surface of the lower through diaphragm, the rectangular core and the upper surface of the upper diaphragm are the same as the height of the H steel, and the upper surface of the lower through diaphragm and the rectangular shape. A reinforcing plate having a required thickness is inserted into a portion surrounded by the lower surface of the core portion and the upper diaphragm in three directions and a portion corresponding to the position of the wave surface of the beam made of H steel. After fixing both sides of the reinforcing plate in contact with the facing surface by welding, attach the lower through diaphragm, the upper through diaphragm and the beam made of H steel to the upper and lower two attaching plates, and further to the reinforcing plate and the beam made of H steel. A joint structure for a steel structure, characterized in that it is fixed with bolts, washers and nuts through two attachment plates on both sides in contact with the wave surface. 2. A joint structure for a steel structure, wherein a scallop of a reinforcing plate does not have to be provided at a contact point between the lower diaphragm and the prism and a contact point between the prism and the upper diaphragm according to claim 1.