JP2016211164A - Junction structure - Google Patents

Abstract

A good axial force can be transmitted between a plurality of steel cylinders and a joint where a connecting part formed by joining ends of the plurality of steel cylinders is joined.
A plurality of steel cylinders each having one end joined to one joint, and the other ends of the plurality of steel cylinders are joined together to form one closed cross section. And a steel partition in which an end in the width direction is joined to the joint to partition the closed cross section, and an end in the length direction is joined to the other joint. And a board.
[Selection] Figure 1

Description

  The present invention relates to a joining structure that aggregates a plurality of steel pipes into one.

  Patent Document 1 is composed of one vertical column erected on the ground and two oblique columns provided in different oblique upward directions from the upper end of the vertical column. A strut member serving as a structural member is disclosed.

  In such a joining structure in which the ends of a plurality of shaft-like members are joined together to be integrated into one connecting part, a plurality of shafts are used so that local bending deformation or buckling does not occur in the connecting part. A good axial force is required to be transmitted between the shaped member and the joint where the connecting part is joined (in Patent Document 1, the upper end of the vertical column).

JP 2009-30253 A

  In consideration of the fact, the present invention provides a good shaft between a plurality of steel cylinders and a joint where joints constituted by joining ends of the plurality of steel cylinders are joined. The task is to be able to transmit force.

  In the first aspect of the invention, a plurality of steel cylinders each having one end joined to one joint and the other ends of the plurality of steel cylinders are joined to form one closed cross section. In addition, a connecting portion to be joined to another joining portion, and an end portion in the width direction are joined to the joining portion to partition the closed cross section, and an end portion in the length direction is joined to the other joining portion. And a steel partition plate.

  In the first aspect of the invention, the other end portions of the plurality of steel cylinders are joined together to form a connecting portion, and the connecting portion is joined to another joining portion, so that a plurality of from one other joining portion. Can be branched into a steel cylinder.

  In addition, the end portion in the width direction of the steel partition plate is joined to the connecting portion to partition the closed cross section of the connecting portion into a plurality of closed cross sections, and the end portion in the length direction of the steel partition plate is used as another joining portion. By joining, the cross-sectional defect of the connecting portion is compensated, and the axial force can be satisfactorily transmitted from a plurality of steel cylinders to other joints, or from other joints to a plurality of steel cylinders. it can.

  For example, when a connecting part is provided on a column beam joint, and a plurality of steel cylinders are provided upward as branching columns from this connecting part, the connecting parts act on a plurality of steel cylinders. The axial force can be satisfactorily transmitted to the column beam joint through the connecting portion.

  Furthermore, since the steel partition plate is provided so as to partition the closed cross section of the connecting portion into a plurality of closed cross sections, the proof stress of the connecting portion can be increased.

  In addition, because the steel partition plate is provided so that the closed cross section of the connecting part is divided into a plurality of closed cross sections, the connecting part is filled with concrete to form a CFT structure (Concrete-Filled Steel Tube). If it does so, the yield strength of a connection part can be raised further according to the confinement effect.

  According to a second aspect of the invention, in the joining structure of the first aspect, the steel cylinder is a square steel pipe configured by welding and joining four steel plates.

  In the second aspect of the invention, the steel cylinder is a square steel pipe formed by welding and joining four steel plates. Therefore, compared to a ready-made steel pipe, the connection portion is formed and the steel partition plate to the connection portion is formed. Can be easily joined.

  Since the present invention has the above-described configuration, a good shaft is provided between the plurality of steel cylinders and the joint where the ends formed by joining the ends of the plurality of steel cylinders are joined. Can transmit power.

It is a perspective view which shows the joining structure which concerns on embodiment of this invention. It is a front view which shows the joining structure which concerns on embodiment of this invention. 3A is a cross-sectional view taken along the line AA in FIG. 2, FIG. 3B is a cross-sectional view taken along the line BB in FIG. 2, and FIG. 3C is a cross-sectional view taken along the line CC in FIG. 4A is a plan view showing the third floor of the building, and FIG. 4B is a plan view showing the first floor of the building. It is an elevation view which shows the repair building which concerns on embodiment of this invention. FIG. 6A, FIG. 6B, and FIG. 6C are plan sectional views showing variations of the joint structure according to the embodiment of the present invention. It is a plane sectional view showing the variation of the joining structure concerning the embodiment of the present invention. It is a plane sectional view showing the variation of the joining structure concerning the embodiment of the present invention. It is an elevation view which shows the seismic isolation building which concerns on embodiment of this invention.

  Embodiments of the present invention will be described with reference to the drawings. First, a joint structure according to an embodiment of the present invention will be described.

  The perspective view of FIG. 1 and the front view of FIG. 2 show the joint structure 18 of the present embodiment that branches the pillar 12 standing on the first floor of the building 10 into two oblique pillars 14 and 16. .

  The oblique pillars 14 and 16 are provided on the second floor of the building 10, and one pillar 12 and two pillars erected on the third floor of the building 10 (not shown, hereinafter referred to as “pillars 20 and 22”). ) To form a column beam frame 44 together with beams 26, 28 and 30 which will be described later. The columns 12, 20, and 22 are made of square steel pipes filled with concrete inside, and the upper end portion of the column 12 is a column beam joint portion 24.

  At the upper and lower ends of the column beam joint portion 24, a through diaphragm type upper diaphragm 106 and a lower diaphragm 108 are provided, and upper and lower flanges of beams 26, 28, and 30 made of H-shaped steel arranged substantially horizontally. Are welded and joined to the upper diaphragm 106 and the lower diaphragm 108, respectively, and the ends of the webs of the beams 26, 28, and 30 are welded and joined to the side surfaces of the column beam joint portion 24, whereby the column beam joint portion 24 is joined. Beams 26, 28, and 30 are joined to each other. The beam 26 and the beam 30 are arranged on a straight line in a plan view, and the beams 26, 30 and the beam 28 are arranged orthogonally in a plan view. In the following description, the beam length direction of the beams 26 and 30 is a direction X, and the beam length direction of the beam 28 is a direction Y. That is, the direction X and the direction Y are orthogonal in plan view.

  The joining structure 18 includes two oblique columns 14 and 16 as a plurality of steel cylinders, a connecting portion 32, and a partition plate 34 made of a steel plate as a steel partition plate. The oblique column 14 is provided to be inclined in the direction Y, and the oblique column 16 is provided to be inclined in the direction X.

  As shown in FIG. 1A and FIG. 3A, which is a cross-sectional view taken along line AA of FIG. 2, the oblique columns 14 and 16 are formed of square steel pipes formed by joining four steel plates 36 by groove welding. The concrete V is filled inside. Upper end portions (not shown) as one end portions of the oblique columns 14 and 16 are respectively joined to lower end portions (not shown) of the columns 20 and 22 as one joining portion.

  As shown in FIG. 1B and FIG. 3B, which is a sectional view taken along the line B-B of FIG. 2, the connecting portion 32 opens the lower end portions 38 and 40 as the other end portions of the two oblique columns 14 and 16. It is formed by joining by pre-welding to form one closed section 42. Moreover, as shown in FIG. 2, the connection part 32 is joined to the column beam joint part 24 as another junction part.

  As shown in FIG. 3B and FIG. 3C, which is a cross-sectional view taken along the line CC in FIG. 2, the partition plate 34 is connected to the column beam joint portion 24 from the inside of the connecting portion 32 via the upper diaphragm 106. It is arranged up and down across the interior of the.

  As shown in FIG. 3B, inside the connecting portion 32, the partition plate 34 has left and right end portions in the width direction W of the partition plate 34 joined to the connecting portion 32 by groove welding, and has a closed cross section 42. Is divided into two. Further, the partition plate 34 is embedded in the concrete V filled in the connection portion 32 inside the connection portion 32.

  As shown in FIG. 3C, the lower end portion of the partition plate 34 (the portion below the upper diaphragm 106) is groove-welded to the column beam joint portion 24 at the left and right end portions in the width direction W of the partition plate 34. The closed cross section of the column beam joint 24 is divided into two. The lower end of the partition plate 34 is embedded in the concrete V filled in the column beam joint 24. Further, the lower end surface of the partition plate 34 is welded to the upper surface of the lower diaphragm 108.

  That is, the partition plate 34 is joined to the connection portion 32 at the left and right ends in the width direction W of the partition plate 34 to partition the closed section 42 and is provided integrally with the upper diaphragm 106 and the lower diaphragm 108. An end portion in the length direction (in this example, a lower end portion) is joined to a column beam joint portion 24 as another joining portion.

  Next, the operation and effect of the joint structure according to the embodiment of the present invention will be described.

  In the joining structure 18 of the present embodiment, as shown in FIG. 1, the lower end portions 38 and 40 of the two oblique columns 14 and 16 are joined together to form a connecting portion 32, and the connecting portion 32 is connected to a column beam joint. By joining to the portion 24, it is possible to branch from the one column beam joint portion 24 to the two oblique columns 14 and 16.

  Moreover, in the joining structure 18 of this embodiment, as shown in FIG.3 (b), the left-right edge part of the width direction W of the partition plate 34 is joined to the connection part 32, and the closed cross section 42 of the connection part 32 is made into several. By partitioning into a closed cross section and joining the lower end portion of the partition plate 34 to the column beam joint portion 24, the cross-sectional defect of the connecting portion 32 is compensated, and the two oblique columns 14, 16 to the column beam joint portion 24. The axial force acting on the oblique columns 14 and 16 can be transmitted well. Further, as shown in FIG. 1, the axial force acting on the oblique columns 14 and 16 is well transmitted from the two oblique columns 14 and 16 to the column beam joint portion 24, thereby locally bending the connecting portion 32. Since it is possible to suppress the occurrence of deformation, buckling, and the like, the column beam structure 44 having the oblique columns 14 and 16 is made to exhibit high deformation performance and the collapse mechanism becomes tough. 44 can be constructed.

  Furthermore, in the joint structure 18 of the present embodiment, as shown in FIGS. 3B and 3C, the closed cross section 42 of the connecting portion 32 and the closed cross section of the column beam joint portion 24 are divided into a plurality of closed cross sections. Since the partition plate 34 is provided so as to be partitioned into two, the strength of the connecting portion 32 and the column beam joint portion 24 can be increased.

  Further, in the joint structure 18 of the present embodiment, as shown in FIG. 1, since it can be branched into two oblique columns 14, 16 from one column beam joint portion 24, it is erected on the first floor of the building 10. By connecting one pillar 12 and two pillars 20 and 22 erected on the third floor of the building 10 with two oblique pillars 14 and 16, the load on the third floor can be transmitted well to the first floor. it can. In other words, in a building with different pillars and number of pillars on the lower and upper floors, the upper floor load is connected to the lower floor pillars to improve the load on the upper floor. I can tell you.

  For example, in the building 46 shown in the plan views of FIGS. 4A and 4B, the floor 48 constituting the third floor of the building 46 is provided with columns 50 </ b> A and 50 </ b> B in addition to the corners of the floor 48 for viewing. Parking floors with 50C and 50D installed (no corner pillars), and the floor 52 that constitutes the first floor of the building 46 has a larger installation interval between the pillars 54A, 54B, and 54C in order to get in and out of the car. Since the floor is used for a parking lot, the floor division and the number of pillars of the floor 48 and the floor 52 are different. The pillars are not arranged immediately below the pillars 50B and 50C arranged on the floor 48, and are provided on the floor 52. A column is not disposed immediately above the column 54B.

  In such a building 46, the upper ends of the oblique columns 14 and 16 branched by the joining structure 18 of the present embodiment are joined to the lower ends of the columns 50B and 50C, and the connecting portion 32 is joined to the upper end of the column 54B. And if the pillars 50B and 50C and the pillar 54B are connected, the load of the 3rd floor of the building 46 can be favorably transmitted to the 1st floor of the building 46.

  Further, for example, in the renovated building 60 constructed by adding the extension structure 58 (5th to 6th floors) on the existing building 56 (1st to 4th floors) shown in the elevation view of FIG. The column division and the number of columns of the columns 62A, 62B, 62C, 62D, 62E and the columns 64A, 64B, 64C of the extension structure 58 are different.

  In such a renovated building 60, the upper ends of the oblique columns 14 and 16 branched in the joint structure 18 of the present embodiment (in this example, the oblique columns 14 and 16 are both inclined in the direction X). If it joins to the lower end part of pillar 64A, 64B, 64C, joining part 32 is joined to the upper end part of pillar 62B, 62D, and pillar 64A, 64B, 64C and pillar 62B, 62D are connected, it will be repaired building 60 The load on the sixth floor can be transmitted well to the existing building 56.

  Furthermore, in the joining structure 18 of the present embodiment, as shown in FIGS. 3B and 3C, the inside of the connecting portion 32 and the column beam joint portion 24 is filled with concrete V, and the connecting portion 32 Since the partition plate 34 is provided so as to partition the closed cross section 42 and the closed cross section of the column beam joint portion 24 into a plurality of closed cross sections, the strength of the connecting portion 32 and the column beam joint portion 24 is reduced by the confining effect. It can be further increased.

  Further, in the joint structure 18 of the present embodiment, the oblique columns 14 and 16 are formed of square steel pipes formed by welding and joining the four steel plates 36. Therefore, compared to a ready-made steel pipe, The partition plate 34 can be easily joined to the connecting portion 32.

  The embodiment of the present invention has been described above.

  In the present embodiment, as shown in FIG. 1, as an example, the oblique columns 14 and 16 as the steel cylinders are rectangular steel pipes filled with concrete, but the oblique columns 14 and 16 are Any steel tube may be used. For example, the oblique columns 14 and 16 may be steel pipes such as square steel pipes and round steel pipes, or may be steel pipes such as square steel pipes and round steel pipes filled with concrete inside.

  The cross-sectional shape and cross-sectional size of the oblique columns 14 and 16 may be any shape, and are shown in the plan cross-sectional views of FIGS. 6 (a), 6 (b), and 6 (c). Thus, the oblique columns 14 and 16 having different cross-sectional shapes may be joined together. That is, the joining structure 18 of the present embodiment can branch steel cylinders having various cross-sectional shapes and cross-sectional sizes in an arbitrary direction.

  Moreover, in this embodiment, as shown in FIG. 1, although the example which used the steel cylinder as the pillar (slanting pillars 14 and 16) was shown, the brace member may be sufficient as a steel cylinder. For example, all of the plurality of branched steel cylinders may be brace members, or some may be brace members and the remaining may be column members.

  Further, in the present embodiment, as shown in FIGS. 1, 3A, 3B, and 3C, from one column beam joint portion 24 to two oblique columns 14,16. Although the example which branches is shown, you may make it branch to three or more oblique pillars from one pillar beam joint part 24. FIG. If one closed cross section formed by joining the lower ends of three or more oblique pillars can be partitioned by a partition plate, the axial force can be transmitted from three or more oblique pillars to the column beam joint 24. can do.

  For example, as shown in the plan sectional views of FIGS. 7 and 8, one column beam joint portion 24 may be branched into three oblique columns 14, 16, 66. In FIG. 7, at the connecting portion 70 formed by joining the lower ends of the three oblique columns 14, 16, 66 and having a closed cross-section 68, the intersection 72 between the oblique column 14 and the oblique column 16, Partition plates 78, 80, 82 made of steel plates are arranged so as to connect the intersection 74 of the oblique column 66 and the intersection 76 of the oblique column 66 and the oblique column 14, and the width direction of the partition plates 78, 80, 82 The left and right end portions of W are welded to the connecting portion 70 to partition one closed section 68 into four.

  In FIG. 8, the lower end portions of the three oblique columns 14, 16, 66 are joined to each other, and in a connecting portion 70 having a closed section 68, the intersection 72 of the oblique column 14 and the oblique column 16, and the oblique column 16 and the oblique column 16 are inclined. Steel plates 86, 88, 90 are arranged so as to connect the intersection point 74 of the column 66, the intersection point 76 of the oblique column 66 and the oblique column 14, and the center point 84 of the closed section 68, and the steel plates 86, 88, The end portions of 90 are joined at a center point 84.

  The steel plate 86 and the steel plate 88 constitute the partition plate 92, the steel plate 88 and the steel plate 90 form the partition plate 94, and the steel plate 90 and the steel plate 86 form the partition plate 96. Yes. And the right-and-left end part of the width direction W of the partition plates 92, 94, 96 is weld-joined to the connection part 70, and the one closed cross section 68 is divided into three.

  In this embodiment, as shown in FIGS. 1, 2, and 3B, an example in which the oblique column 14 is provided to be inclined in the direction Y and the oblique column 16 is provided to be inclined in the direction X. Although shown, if a plurality of oblique pillars are branched in different directions, the oblique pillars may be provided in any manner, and the oblique pillars may be vertical pillars. For example, the oblique column may be provided to be inclined in the direction X, may be provided to be inclined to the direction Y, or may be provided to be inclined in both the direction X and the direction Y.

  Furthermore, in this embodiment, as shown in FIG. 1, the upper ends of the oblique columns 14 and 16 are joined to the lower ends of the columns 20 and 22, respectively, and the connecting portion 32 is joined to the column beam joint 24. Although the example in which the two oblique columns 14 and 16 as the plurality of steel cylinders are branched upward has been shown, the plurality of steel cylinders may be branched downward. That is, the lower ends of the plurality of oblique columns are respectively joined to the upper ends of the columns provided on the lower floor, and the connecting portions formed by joining the upper ends of the plurality of oblique columns are provided on the upper floor. You may make it join to the lower end part of a pillar. Even in this case, the axial force can be satisfactorily transmitted from the lower end portion of the column provided on the upper floor to the plurality of oblique columns.

  In the present embodiment, as shown in FIG. 1, a pillar 12 standing on the first floor of the building 10 and two pillars standing on the third floor of the building 10 are provided on the second floor of the building 10. Although the example in which the diagonal columns 14 and 16 are connected is shown, the diagonal columns 14 and 16 may be provided on any floor of the building.

  Furthermore, in this embodiment, as shown in FIG. 1, an example in which one joint portion is the lower end portion of the columns 20 and 22 and the other joint portion is the column beam joint portion 24 is shown. Parts and other joints may be other parts of the building.

  For example, as shown in the elevation view of FIG. 9, the joint structure 18 of the present embodiment may be applied to a seismic isolation building 98. In the seismic isolation building 98 of FIG. 9, the connecting portion 32 is joined to the upper end portion 102 of the seismic isolation device 100 as another joining portion, and the upper end portions of the oblique columns 14 and 16 are joined to the lower end portion of the upper-level column 104. (In this example, the oblique columns 14 and 16 are both inclined in the direction X).

  In the present embodiment, as shown in FIGS. 3B and 3C, an example in which the partition plate 34 is arranged vertically from the inside of the connecting portion 32 to the inside of the column beam joint portion 24. However, the partition plate 34 is only required to be disposed inside the connecting portion 32 (the partition plate 34 may not be disposed inside the column beam joint portion 24). It is preferable to dispose the partition plate 34 inside the column beam joint 24 because the axial force acting on the connecting portion 32 can be transmitted to the column beam joint 24 satisfactorily.

  Furthermore, in this embodiment, the columns 12, 20, and 22 constituting the column beam frame 44 are CFT structures in which concrete is filled in a square steel pipe, and the beams 26, 28, and 30 are H-shaped steel. However, these columns and beams may have various structures such as a steel structure, a steel reinforced concrete structure, a CFT structure, and a mixed structure thereof.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to such embodiment at all, Of course, in the range which does not deviate from the summary of this invention, it can implement in a various aspect.

14, 16, 66 Oblique column (steel cylinder)
18 Joint structure 24 Column beam joint (other joints)
32, 70 Connecting part 34, 78, 80, 82, 92, 94, 96 Partition plate (steel partition plate)
38, 40 Lower end (other end)
42, 68 Closed section 102 Upper end (other joints)

Claims (2)

A plurality of steel cylinders each having one end joined to one joint,
Joining the other ends of the plurality of steel cylinders to form one closed cross section, and a connecting portion to be joined to the other joining portion;
A steel partition plate in which an end portion in the width direction is joined to the connecting portion to partition the closed cross section, and an end portion in the length direction is joined to the other joining portion,
Having a junction structure.   The joint structure according to claim 1, wherein the steel cylinder is a square steel pipe configured by welding and joining four steel plates.

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