JP2012107416A - Beam joint structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a beam joint structure which enhances the degree of freedom of a beam shape and a beam installation direction, which facilitates joint operations, and which is excellent in durability.SOLUTION: In a beam joint structure, beam-side end plates 29 to 32 welded to front end surfaces of beams 20 to 23 comprising inclined planes with upper ends each taking the form of an acute angle and support-side end plates 33 to 36 welded to end surfaces of a support member 25 so that angles of upper ends can be set as supplementary angles of the angles of the inclined planes of the corresponding beams 20 to 23 are joined together in the state of overlapping one another. This structure enables stabilization of a state in which the beam-side end plates 29 to 32 are placed on the support-side end plates 33 to 36, and enables joint operations to be performed with great ease.

Description

  The present invention relates to a beam connection structure in a rigid frame structure, and more particularly to a beam connection structure capable of increasing the degree of freedom in the shape of the beam and the direction in which the beam is provided.

  Generally, the joining of the beams in the rigid frame structure has a structure as shown in FIGS. The beam 1 is made of H-shaped steel and has a vertical end face. A supporting beam 2 (sometimes referred to as a “bracket”) 2 that supports the beam 1 is made of H-shaped steel, one end is welded to the column 3, and the shape and thickness of the end surface on the other end side are beams. It corresponds to the end face of 1. The beams 1 and 2 abut each other's end faces, and the upper and lower flanges 1a and 2a are sandwiched between the splice plates 4 to 9 and the webs 1b and 2b are sandwiched between the splice plates 10 and 11, respectively. It was rigidly joined by tightening with force bolts 12-14.

  In the joining structure, many splice plates 4 to 11 are required. For this reason, there existed a problem that joining took the effort and cost. Further, since the force applied to the beam 1 is received only by the splice plates 4 to 11, if the splice plates 4 to 11 are reduced, the strength is greatly reduced, and it is difficult to reduce the number of members.

  Therefore, a column and beam joint structure has been proposed in which an inclined end plate is attached to the upper end of the column, an inclined end plate is also attached to the end of the beam, and the end plates are brought into contact with each other and joined together (for example, Patent Document 1). With this structure, it is not necessary to provide a splice plate at the joint portion, and the number of members can be reduced.

  However, since the beam is directly bonded to the upper end of the column, there is a problem in that one beam can only be bonded to the column in one direction. Moreover, in this structure, since it joins in the part with the largest stress in a ramen structure, high joint strength and durability are calculated | required. Furthermore, since the joint portion is located at the upper end of the column, it is necessary to provide a working scaffold during construction. In addition, when lifting the column, there is a problem that the lifting plate cannot be attached to the upper end of the column, and the hanging plate must be attached to the side of the column to make it difficult to work. It was.

JP 2007-284912 A

  The problem to be solved by the present invention is to solve the above-mentioned conventional problems, to increase the flexibility of the shape of the beam and the direction in which the beam is provided, and to provide a beam joining structure that is easy to join and excellent in durability. It is in.

  The beam connection structure of the present invention is a beam connection structure in a rigid frame structure, the end surface of which is an inclined surface whose upper end angle forms an acute angle, a beam side end plate welded to the end surface of the beam, A support member fixed to the column and connecting a line connecting the upper end and the lower end of the end part so that the angle of the upper end forms a complementary angle of the angle of the inclined surface of the beam, and the end part of the support member A support-side end plate welded to the beam-side end plate, and the support-side end plate and the beam-side end plate are fastened together. For example, a high-strength bolt is used as the fastening means.

  The support member in the beam joint structure includes, for example, an upper support plate and a lower support plate that are fixed to the upper end of the column with a space in the vertical direction, and a connection plate that connects the upper support plate and the lower support plate. Become. The support side end plate is welded to an inclined surface formed by the end of the upper support plate, the end of the lower support plate, and the end of the connecting plate.

  The upper support plate and the lower support plate each have an upper flange and a lower flange that protrude in directions corresponding to each other. The connecting plate is welded to the upper flange and the lower flange.

  The support member may be a support side beam having the same or different structure as the beam. The support side end plate is welded to the end of the support side beam.

  In the beam joint structure of the present invention, a beam-side end plate welded to an end surface of a beam composed of an inclined surface having an acute angle at the upper end, and a support in which the angle of the upper end complements the angle of the corresponding inclined surface of the beam. Since the support side end plate welded to the end face of the member is overlapped and joined, the cross-sectional shape of the beam and the structure of the beam itself can be freely selected compared to the conventional case of joining beams. The degree has increased. Further, when the beam-side end plate is placed on the support-side end plate and joined together, the beam is stabilized, so that the joining work between the end plates can be performed very easily.

  In addition, in the beam joint structure of the present invention, the beam can be joined to any shape column as long as the support member can be fixed, and the beam can be freely joined depending on the direction in which the support member to be fixed to the column is provided. The direction to join the beams can also be set. In particular, many support-side end plates can be attached efficiently by connecting the upper support plate and the lower support plate respectively having upper flanges and lower flanges protruding in directions corresponding to each other by connecting plates. A plurality of directions for joining the beams can be set.

  In addition, since the joint portion of the beam in the beam joint structure of the present invention is always provided at the portion where the load is the smallest, only the load of each beam is applied, joining with two end plates is sufficient. Has strength and excellent durability.

  Moreover, in the beam joining structure of this invention, since it can get on the top part of a pillar, or the plate for lifting can be attached, joining work is easy.

It is a perspective view which shows the beam junction structure which concerns on one Example of this invention. It is a top view of the beam junction structure shown in FIG. It is a side view of the beam junction structure shown in FIG. It is a perspective view which shows a state when attaching the upper support plate in the beam junction structure shown in FIG. 1, a lower support plate, and a connection plate to a pillar. It is sectional drawing which shows a state when the support side end plate and beam side end plate which are shown in FIG. 1 are piled up. It is a perspective view which shows the state which comprised the supporting member shown in FIG. 1 etc. by the support side beam similar to a beam. It is a side view which shows a state when a beam side end plate is piled up on the support side end plate shown in FIG. It is a side view which shows a state when the support side end plate and beam side end plate which are shown in FIG. 7 are joined. It is a side view which shows the example which changed the structure of the beam shown in FIG. It is a side view which shows the conventional beam junction structure. It is explanatory drawing which shows the joint part in the beam junction structure shown in FIG.

  1 to 3 are a perspective view, a plan view, and a side view showing a beam joint structure according to an embodiment of the present invention, and FIG. 4 is a perspective view showing a state in which a vertical support plate and a connecting plate are assembled to a column. 5 is a cross-sectional view showing a state in which the beam and the support member are assembled. Reference numerals 20 to 23 denote beams, which are made of H-shaped steel in this embodiment. In the beams 20 to 23, as in the beam 22 illustrated in FIG. 5, the front end surface 22a is an inclined surface so that the angle (inner angle) 22b of the upper end 22c of the front end surface 22a forms an acute angle.

  Reference numeral 24 denotes a pillar. In this embodiment, a pillar or cylinder is used. The outer shape of the column 24 can be arbitrarily changed, and the cross-sectional shape may be a polygonal shape or H-shaped steel. In addition, the outer diameters of the upper and lower portions may be changed so that the upper portion becomes thinner so that the fixing of the support member described later becomes easier, or a groove or a protrusion may be provided at the fixing position.

  Reference numeral 25 denotes a support member fixed to the column 24. As shown in FIG. 4, the support member 25 in this embodiment includes an upper support plate 26 and a lower support plate 27 that are fixed to the pillar 24 at a predetermined interval in the vertical direction, and the upper support plate 26 and the lower support plate. It is comprised between the connection plates 15-18 which are provided between 27 and connect them.

  The upper support plate 26 has a plate surface facing in the vertical direction, an attachment hole 26a that fits the column 24 in the center, and a plurality of upper flanges 26b to 26e that protrude radially. In addition, the lower support plate 27 has a mounting surface 27a in the center that is substantially parallel to the upper support plate with the plate surface facing up and down, and corresponds to the upper flanges 26b to 26e of the upper support plate 26. It has a plurality of lower flanges 27b to 27e protruding at the side ends. The upper flanges 26b to 26e of the upper support plate 26 and the lower flanges 27b to 27e of the lower support plate 27 are set such that the lengths of the lower flanges 27b to 27e are longer than the upper flanges 26b to 26e. Further, as shown in FIG. 5, the upper flanges 26b to 26e and the lower flanges 27b to 27e are lines connecting the end portion 26f of the upper flange 26d located above and the end portion 27f of the lower flange 27d located below. (A line positioned on the surface of the support side end plate 35 to be described later) An angle 28a (an angle (inner angle) formed by the line 28 and the upper flange 26d) 28a forms a complementary angle to the angle 22b of the beam 22 described above. As such, the protruding length is set.

  The connection plates 15 to 18 are provided between the upper flanges 26b to 26e of the upper support plate 26 and the lower flanges 27b to 27e of the lower support plate 27, respectively, like the connection plate 17 illustrated in FIG. The plate surface faces sideways, and the upper end 17a and the lower end 17b are abutted substantially perpendicularly to the center of the plate surfaces of the upper flange 26d and the lower flange 27d and welded. Further, the front end surface 17c of the connecting plate 17 is a surface inclined along a line 28 connecting the front end portion 26f of the upper flange 26d and the front end portion 27f of the lower flange 27d. Thereby, the surface comprised by the front-end parts 26f and 27f of the upper flange 26d and the lower flange 27d and the front-end surface 17c of the connection plate 17 turns into an inclined surface of a predetermined angle.

  Thus, the upper indicator plate 26, the lower support plate 27, and the connection plates 15 to 18 constituting the support member 25 are assembled to the column 24, welded to each other, and welded to the column 24 to form the column 24. Fixed. Further, the upper support plate 26, the lower support plate 27, and the connection plates 15 to 18 may be assembled in advance and temporarily fixed, and may be assembled to the pillar 24 and aligned before welding. In this case, the attachment to the pillar 24 is easy, and the shape can be adjusted and the alignment can be performed reliably at that time.

  Reference numerals 29 to 32 denote beam-side end plates welded to the front end surfaces of the beams 20 to 23, respectively. The beam side end plates 29 to 32 in the present embodiment are made of a rectangular plate-shaped steel material, and are appropriately provided with holes through which bolts are inserted. These beam-side end plates 29 to 32 are welded to the front end surface 22a of the beam 22 like the beam-side end plate 31 illustrated in FIG. 5, and are inclined in the same manner as the front end surface 22a, and are joined obliquely downward. It will be in the state which faced 31a.

  Reference numerals 33 to 36 denote support-side end plates, which are made of a plate-like steel material having the same rectangular shape as the beam-side end plates 29 to 32, and are formed with holes through which bolts are inserted. The support side end plates 33 to 36 are welded to the front end portions of the upper flanges 26b to 26e and the lower flanges 27b to 27e of the upper support plate 26 and the lower support plate 27 and the front end surfaces of the connection plates 15 to 18. That is, like the support side end plate 35 shown in FIG. 5, the front end portion 26 f of the upper flange 26 d of the upper support plate 26, the front end portion 27 f of the lower flange 27 d of the lower support plate 27, and the front end surface 17 c of the connecting plate 17, respectively. It is welded to. Thus, the support side end plate 33 welded to the upper flange 26b, the lower flange 27b, and the connecting plate 17 is mounted on the line 28, and is inclined in the same manner as the line 28, and is obliquely upwardly joined. It will be in the state which turned 35a.

  Reference numeral 37 denotes a high-strength bolt as a fastener. A plurality of high-strength bolts 37 are inserted into corresponding holes in the beam-side end plates 29 to 32 and the support-side end plates 33 to 36, respectively, and are tightened with nuts from below, so that the beam-side end plates 29 to 32 and the support-side end Plates 33-36 can be joined.

  Next, the joining state of the beam joining structure configured as described above will be described with reference to the beam 22, the upper support plate 26, the lower support plate 27, and the connection plate 17 shown in FIG. As described above, the beam-side end plate 31 welded to the front end surface 22a of the beam 22 is inclined so that the joint surface 31a faces obliquely downward. Further, the front end portions 26f and 27f of the upper support plate and the lower support plate 27 and the support side end plate 35 welded to the front end surface 17c of the connecting plate 17 are inclined so that the joint surface 35a faces obliquely upward. . Since the beam-side end plate 31 and the support-side end plate 35 have an angle 22b and an angle 28a that are complementary to each other, the upper support plate 26 and the beam 22 are aligned in a straight line when they are overlapped. At this time, the load of the beam 22 is applied to the support side end plate 35 via the beam side end plate 31, and the support side end plate 35 supports the beam 22 in a stable state at the joint surface 35a. In this state, the work of attaching the high-strength bolt 37 and tightening with the nut can be performed very easily, and can be joined in the state shown in FIGS. 1 and 3.

  The beam joint structure as described above can be performed at both ends of the beam 22 at the same time. At this time, the beam 22 is supported in a stable state by the support side end plate 35, and the beam 22 is dropped. The occurrence of misalignment can also be prevented.

  Further, the above-described beam joint structure can be applied even when the shapes and structures of the beams 20 to 23 and the support member 25 are completely different as in the present embodiment. Therefore, the plurality of beams 20 to 23 can be joined to the single support member 25 by changing the shape, structure, size and the like of each of the beams 20 to 23. For example, as shown in FIGS. 1 to 3, the beams 21 to 23 and the beam 20 thinner than them can be joined to the same support member 25. In this case, as shown in FIGS. 3 and 4, the lower flange 27b is bent upward according to the vertical dimension of the beam 20 to adjust the angle of the support side end plate 33, and the connecting plate is adjusted accordingly. By adjusting the inclination of the front end surface 15c of 15 and using the support side end plate 33 smaller than the other support side end plates 34 to 36, the appearance can be adjusted.

  In this embodiment, the upper support plate 26, the lower support plate 27, and the connection plates 15 to 18 are used as the support member 25, but an overhanging beam in which a steel material similar to the beams 20 to 23 is welded to the column 24 or A support member such as a bracket can also be used.

  6 to 8 show a structure in which the beam 39 including the above-described overhanging beam or the like and the beams 20 to 23 (the beam 20 is illustrated in FIGS. 6 to 8) are joined. In this beam joint structure, the base end portion of the projecting beam 39 is welded to the side surface of the prismatic column 41 and the support side end plate 40 is welded to the tip portion. Also in this case, similarly to the beam joint structure described above, the front end surface 20a is formed as an inclined surface so that the angle 20b of the upper end 20c of the front end surface 20a of the beam 20 forms an acute angle. The side end plate 29 is welded. Further, the front end surface 39a of the overhanging beam 39 is an inclined surface inclined so that the angle 39b of the upper end 39c thereof is a complementary angle of the angle 20b of the beam 20, and the support side end plate 40 is welded thereto. Yes. Thus, the joint surface 29a of the beam side end plate 29 is placed on the joint surface 40a of the support side end plate 40 set at an angle in the same manner as the beam joint structure described above, and tightened with the high strength bolt 37. Join with.

  Further, regarding the structure of the beam, not only the thickness is changed as in the beams 20 to 23, but the structure of the overhanging beam 39 is not changed as shown in FIG. The structure can be changed freely. For example, a beam 38 made of a truss structure can be used.

  In each of the above embodiments, the beam side end plate is placed on the support side end plate and joined to each other. However, in the present invention, the positional relationship between the two is reversed and the beam side end plate is placed on the beam side end plate. It is also applied to the case where the support side end plate is overlapped and joined to each other.

  As described above, in the beam joint structure of the present invention, the shape and specifications of the pillars 24 and the beams 20 to 23 can be arbitrarily changed. Therefore, a ramen structure that supports a tent, a roof, and an exhibition hall in a special venue or the like. By using it in a ramen structure that supports buildings and roofs such as parking lots and gas stations that require high strength with a small number of pillars, it is possible to improve the appearance or adapt to special designs.

  In addition, since assembly and disassembly are easy, assembly and disassembly operations can be rapidly advanced by using them for temporary housing, simple buildings, event buildings, and the like.

15-18 connecting plate 15c front end surface 17a upper end 17b lower end 17c front end surface 20-23 beam 24 column 25 support member 26 upper support plates 26a, 27a mounting holes 26b-26e upper flanges 26f, 27f end 27 lower support plates 27b-27e Lower flange 28 Lines 29 to 32 Beam side end plates 29a and 33a Joint surface 33 to 36 Support side end plate 37 High strength bolts 38 and 39 Beam 40 Support side end plates 40a and 41a Joint surface 41 Column

Claims (6)

It is a joint structure of beams in a ramen structure,
A beam composed of an inclined surface whose end face is an acute angle at its upper end;
A beam-side end plate welded to an end face of the beam;
A support member fixed to the column and connected to the line connecting the upper end and the lower end of the end part so that the angle of the upper end forms a complementary angle of the angle of the inclined surface of the beam,
A support side end plate welded to an end of the support member,
A beam joining structure, wherein the support side end plate and the beam side end plate are fastened together.   The support member includes an upper support plate and a lower support plate that are fixed to the upper end of the pillar with a vertical interval, and a connection plate that connects the upper support plate and the lower support plate. The beam joint structure according to claim 1, wherein the support side end plate is welded to an inclined surface formed by the end, the end of the lower support plate, and the end of the connecting plate.   3. The beam according to claim 2, wherein the upper support plate and the lower support plate respectively have an upper flange and a lower flange protruding in directions corresponding to each other, and the connection plate is welded to the upper flange and the lower flange. Junction structure.   2. The beam joint structure according to claim 1, wherein the support member includes a support side beam having the same or different structure or a different shape from the beam, and the support side end plate is welded to an end portion of the support side beam. .   2. The beam joint structure according to claim 1, wherein the beam side end plate is placed on the support side end plate and fastened. 2. The beam joint structure according to claim 1, wherein the support side end plate and the beam side end plate are fastened by a high strength bolt.

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