JP2014196625A - Beam member and junction structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a beam member capable of providing a space through which piping is inserted near a column while maintaining strength of a junction part.SOLUTION: In a junction structure 2, an end 15 of a flange 3 of a beam member 1 is joined to an end 17 of a diaphragm 9 of a column connecting member 7 by a welding part 19, and an end 35 of a web 5 is joined to a side surface of the column connecting member 7 by a welding part 43. The flange 3 of the beam member 1 includes a general part 14, and a deformed part 13 of which thickness is increased as approaching the end 15. The end 35 of the web 5 has a lacking part 23, and piping 33 is inserted therein.

Description

  The present invention relates to a beam member having a flange and a web and a joint structure using the beam member.

  As a joining structure for joining a beam to a column such as a steel pipe column, there is one that joins a beam member having an H-shaped cross section such as a steel beam to a column portion of a structure. FIG. 5 shows an example of this joining structure. In the joining structure shown in FIG. 5, the pillars 101 are vertically connected by the pillar connecting member 103, thereby forming the pillar portion of the structure. Further, one end of the beam member 107 is joined to the column connecting member 103.

  The beam member 107 is an H-shaped member composed of a flange and a web, and upper and lower flanges are respectively joined to diaphragms 105 provided at the upper and lower ends of the column connecting member 103. The web of the beam member 107 is joined to the side surface of the column connecting member 103.

  In the beam member 107, pipes and wirings such as water and air conditioning may be passed. In that case, a through hole is formed in the web of the beam member 107 at a predetermined distance from the column connecting member 103. A pipe or the like is passed through the through hole.

JP 2012-207515 A

  However, when a through-hole is formed in the beam member 107, the strength of that portion decreases. Therefore, in order to ensure earthquake resistance, it is necessary to reinforce the periphery of the through hole with a steel plate or hardware, which increases manufacturing man-hours and costs. Moreover, although piping in the vicinity of a pillar part is preferred on equipment design, there existed a subject that the intensity | strength of a junction part will become weak when the distance from a pillar part to a through-hole is short.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a beam member or the like that can provide a space for passing piping or the like in the vicinity of a column while maintaining earthquake resistance.

  A first invention for achieving the above-described object is a beam member having a flange and a web, wherein the flange has a deformed portion that increases or widens at least as it approaches the end portion, The beam member is characterized by having a missing portion for passing piping or wiring at the end.

In the deformed portion, it is desirable to increase the thickness and widen as the end portion is approached.
In addition, it is desirable that the missing portion is formed by notching an end portion of the web to a boundary between the deformed portion of the flange and a general portion on the opposite side of the end portion with respect to the deformed portion.
Furthermore, the thickness of the end portion of the flange is 1.3 times or more of the thickness of the general portion on the opposite side of the end portion with respect to the deformed portion, and the web height at the end portion of the web is a missing portion. It is desirable that it is 0.4 times or more and 0.7 times or less of the web height in the general part where there is no ink.

  In 1st invention, a defect | deletion part is provided in the edge part of the web joined to a pillar part in a beam member. Thereby, the space for piping and wiring can be provided in the column vicinity. In addition, the flange of the beam member has a deformed part that increases in thickness or widens as it approaches the end joined to the column part, so that the area of the joined part with the column part is increased to improve the strength of the joined part, and the earthquake resistance Can increase the sex. Therefore, the earthquake resistance can be maintained without reinforcing the missing part, and the number of manufacturing steps and costs can be reduced.

  Further, if the flange is increased in thickness and widened at the deformed portion, the area of the joint portion is further increased and the strength can be improved. In addition, if the missing part is provided by cutting the end of the web toward the boundary between the deformed part and the general part of the flange, the missing part will affect the performance of the beam member at the location corresponding to the general part of the flange. There is no advantage.

  Further, the thickness of the end portion of the flange is set to 1.3 times or more of the thickness of the general portion, and for the web, the height of the web at the end portion is set to 0.4 times or more of the height of the general portion without the defect portion. If it is 7 times or less, the strength of the joint part is equivalent to that of a normal beam member that does not have a deformed part or a defective part while obtaining a sufficient space to provide a defective part on the web and let piping pass through. Or more.

  According to a second aspect of the present invention, there is provided a joining structure of a beam member having a flange and a web and a column portion, and the flange has a deformed portion that increases in thickness or widens as it approaches an end portion to be joined to the column portion. And the said web has a deficient part for letting piping or wiring pass in the edge part joined to the said column part, It is a junction structure characterized by the above-mentioned.

  ADVANTAGE OF THE INVENTION According to this invention, the beam member etc. which can provide the space which lets piping etc. in the column vicinity can be provided, maintaining earthquake resistance.

The figure which shows joining structure 2 The figure which shows the relationship between flange thickness increase ratio and bending strength ratio Mp / Mp0 Plan view of the vicinity of the end 15 of the beam member 1a Cross-sectional view of joining structure 2a in the vertical direction Diagram showing an example of a joint structure

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

[First Embodiment]
FIG. 1 is a diagram showing a joint structure 2 according to a first embodiment of the present invention. FIG. 1A is a vertical sectional view of the joint structure 2. FIG. 1B is an enlarged view of the vicinity of the missing portion 23 indicated by a range A in FIG. FIG. 1C is a plan view of the vicinity of the end 15 of the beam member 1. In addition, illustration of the piping 33 is abbreviate | omitted in FIG.1 (b).

  As shown in FIG. 1 (a), in the joint structure 2, as in the example of FIG. 5, the columns 11 are connected up and down by the column connecting members 7, thereby forming the column portion of the structure. Diaphragms 9 are provided at the upper and lower ends of the column connecting member 7.

  The beam member 1 has an H-shaped cross-sectional shape composed of a flange 3 and a web 5, and an end portion 15 of the flange 3 of the beam member 1 and an end portion 17 of the diaphragm 9 are welded and joined by a welded portion 19. . Welding is performed by providing a backing 25.

  The end portion 35 of the web 5 of the beam member 1 is welded and joined to the side surface of the column connecting member 7 by a welding portion 43. However, the end portion 35 of the web 5 may be joined to the side surface of the column connecting member 7 by bolt joining or the like.

  In FIG. 1A, the joint structure 2 is shown in one direction of the column connecting member 7, but in this embodiment, the same joint structure 2 in each direction of the column connecting member 7 as in the example of FIG. Shall be formed. However, it is not limited to this.

  The flange 3 of the beam member 1 includes a general portion 14 and a deformable portion 13. The deformation portion 13 is provided on the end portion 15 side that is joined to the diaphragm 9. The general portion 14 is on the opposite side of the end portion 15 with respect to the deformable portion 13. In the deformed portion 13, the thickness of the flange 3 increases as the end portion 15 is approached from the general portion 14. As such a flange 3, there exists a thing as described in Unexamined-Japanese-Patent No. 2011-084884, for example.

  In the present embodiment, as described later, it is desirable that the thickness 24 at the end 15 of the flange 3 is 1.3 times or more the thickness 22 at the general portion 14. The end 15 of the flange 3 is inclined with respect to the vertical direction. Here, as shown in FIGS. 1A and 1B, the difference in height between the upper end and the lower end of the end 15 is the thickness. 24. In addition, as shown in FIG.1 (c), the width | variety of the flange 3 of the beam member 1 is the same in the general part 14 and the deformation | transformation part 13. As shown in FIG.

  A part of the end portion 35 of the web 5 of the beam member 1 is missing, whereby the missing portion 23 is provided. In this embodiment, as shown in FIGS. 1A and 1B, the upper portion of the end portion 35 is cut out to the boundary between the deformed portion 13 and the general portion 14 of the upper flange 3 to form a substantially triangular defect. Part 23 is formed at the top.

  Further, the lower portion of the end portion 35 of the web 5 is also cut out to the boundary between the deformed portion 13 and the general portion 14 of the lower flange 3, and a substantially triangular-shaped defect portion 23 is formed in the lower portion. In the web 5 of the beam member 1, the substantially triangular defect portions 23 are provided in two places at the upper and lower sides in this way. A pipe 33 is passed through each of these missing portions 23. It is possible to pass not only the piping 33 but also wiring through the missing portion 23.

  In the present embodiment, as will be described later, the web height 29 at the end portion 35 of the web 5 is a portion of the web 5 corresponding to the general portion 14 of the flange 3 without the missing portion 23 (hereinafter, the general portion of the web 5). The web height 27 is preferably 0.4 times or more and 0.7 times or less.

  FIG. 2 shows the relationship between the horizontal axis as the flange thickness increase rate and the vertical axis as the bending strength ratio Mp / Mp0 of the beam member 1. Here, the flange thickness increase ratio is a ratio of the thickness 24 of the end portion 15 of the flange 3 to the thickness 22 of the general portion 14, and the bending strength ratio Mp / Mp0 of the beam member 1 is missing at the end portion 35 of the web 5. This is the ratio between the bending strength Mp when there is a portion and the bending strength Mp0 when there is no defect.

  Each data 37 in the figure shows that the web height 29 of the end portion 35 of the web 5 is changed to the web height of the general portion 14 in each case while changing the flange thickness increase rate from 1.0 to 1.6 times. Bending strength Mp when each beam member changed between 0.4 times and 0.7 times of 27 is used for joining, and a normal beam member with a flange that does not increase in thickness and a web that does not have a defect portion. The ratio Mp / Mp0 with respect to the bending strength Mp0 when used in FIG.

  From FIG. 2, the thickness 24 at the end 15 of the flange 3 is 1.3 times or more the thickness 22 at the general portion 14, and the web height 29 at the end 15 of the web 5 is the web height 27 at the general portion. It can be seen that when the defect portion 23 is provided so as to be not less than 0.4 times and not more than 0.7 times, a bending strength equal to or greater than that in the case of no defect is obtained.

  The web height 29 at the end portion 35 of the web 5 is set to 0.7 times or less the web height 27 at the general portion for the purpose of allowing equipment piping having a diameter of about 80 mm to be inserted into the defective portion 23. In this case, a generally used beam member having a web height of about 500 to 700 mm cannot obtain a sufficient space unless the web height 29 is reduced by about 30%.

  As described above, in the first embodiment, in the beam member 1, the defect portion 23 is provided at the end portion 35 of the web 5 joined to the column portion. Thereby, the space for piping 33 grade | etc., Can be provided in the column vicinity. Further, since the flange 3 of the beam member 1 has the deformed portion 13 that increases in thickness as it approaches the end portion 15 to be joined to the column portion, the area of the joined portion with the column portion is increased to improve the strength of the joined portion. , Can improve the seismic performance. Therefore, the seismic performance can be maintained without reinforcing the missing portion 23, and the manufacturing man-hours and costs can be reduced.

  Further, since the missing portion 23 is provided by cutting the end portion 35 of the web 5 toward the boundary between the deformed portion 13 and the general portion 14 of the flange 3, the missing portion 23 is provided at a location corresponding to the general portion 14 of the flange 3. However, there is an advantage that the design and the like are facilitated without affecting the performance of the beam member 1.

  Further, the thickness 24 of the end 15 of the flange 3 is set to be 1.3 times or more the thickness 22 of the general portion 14, and the web height 29 of the end 35 of the web 5 is set to 0. 0 of the web height 27 of the general portion. If it is 4 times or more and 0.7 times or less, the web 5 is provided with the defect portion 23 to obtain a sufficient space for passing the piping 33 and the like, and the strength of the joint portion is provided with the deformation portion 13 and the defect portion 23. It can be equal to or more than the case of using ordinary beam members that are not used for joining.

  In the first embodiment, the thickness of the flange 3 is increased by the deformable portion 13, but the specification of the flange 3 is not limited to this. For example, as shown in the beam member 1 a in FIG. 3, the deformable portion 13 may be widened as the end portion 15 is approached, and the thickness may be unchanged. In this case, the same effect as described above can be obtained.

  Alternatively, the flange 3 may be thickened and widened at the deformed portion 13 of the flange 3. In this case, welding is performed with a larger area to increase the strength of the joined portion, and the area of the defect 23 can be increased.

  Further, the shape and arrangement of the defect portion 23 are not limited to this embodiment. For example, in the present embodiment, the substantially triangular defect portions 23 are provided at two upper and lower portions, but the shapes of the upper and lower defect portions 23 may be different, and the shape is not limited to a substantially triangular shape. Moreover, the number of the defect | deletion parts 23 is not restricted to what is provided in two places. Hereinafter, an example in which the number of missing portions 23 is different will be described as a second embodiment. The second embodiment will be described with respect to differences from the first embodiment, and description of similar points will be omitted.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. FIG. 4 is a vertical sectional view of the joint structure 2a of the second embodiment.

  As shown in FIG. 4, the joining structure 2a of the second embodiment has substantially the same configuration as the joining structure 2 of the first embodiment, but only the upper part of the end portion 35 of the web 5 of the beam member 1b. They are different in that they are notched in a substantially triangular shape toward the boundary between the deformed portion 13 and the general portion 14 of the flange 3 and one missing portion 23 is provided.

  Also in the second embodiment, the same effect as the first embodiment can be obtained. Further, there is an advantage that the missing portion 23 can be gathered in one place to increase its area and allow a larger pipe 33 to pass. In this manner, the arrangement of the defect portion 23 can be variously determined, and is not limited to being provided at two upper and lower positions as in the first embodiment.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims. It is understood that it belongs.

1, 1a, 1b, 107 ......... Beam member 3 ......... Flange 5 ......... Web 7 ......... Column connecting member 11 ......... Column 13 ......... Deformed portion 14 ...... General portion 15, 17, 35 ......... Ends 22, 24 ......... Thickness 23 ......... Defects 27, 29 ......... Web height 33 ......... Piping

Claims (5)

A beam member having a flange and a web,
The flange has a deformed portion that at least thickens or widens as it approaches the end,
The said web has a missing part for letting piping or wiring pass to an edge part, The beam member characterized by the above-mentioned.   The beam member according to claim 1, wherein the deformed portion is thickened and widened as it approaches the end portion.   The defect portion is formed by notching an end portion of the web to a boundary between the deformed portion of the flange and a general portion on the opposite side of the end portion with respect to the deformed portion. Item 3. The beam member according to item 1 or 2. The thickness of the end of the flange is 1.3 times or more the thickness of the general part on the opposite side of the end with respect to the deformed part,
The web height at the end portion of the web is 0.4 to 0.7 times the web height in the general portion having no defect portion. The beam member described. A joining structure of a beam member having a flange and a web and a column portion,
The flange has a deformed portion that is at least thickened or widened as approaching an end joined to the column portion,
The said web has the missing part for letting piping or wiring pass in the edge part joined to the said column part, The joining structure characterized by the above-mentioned.

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