JP2019035302A - Steel column and column beam joint structure - Google Patents

Abstract

To provide a steel column and column beam joint structure that do not require processing of the column itself, and can suppress deformation of a rounded part even when the rounded part exists between side surfaces of the column.SOLUTION: A steel column 1 includes a column main body 2 in the form of, for example, a square steel pipe, and a flat-shaped support steel 3. Two adjacent surfaces of the column main body 2 are served as connection surfaces, and only the connection surfaces are provided thereon with the flat-shaped support steel member 3. The flat-shaped support steel member 3, which is vertically arranged in two piece structure, is provided on each of the connection surfaces, and in each of the supporting steel members 3, four bolt fastening tap holes 3a are formed in the horizontal direction orthogonal to the side surface of the column main body 2. An end plate 41 of a beam 4 is fixed to the support steel member 3. A bolt 5 is inserted into the bolt insertion hole of an end plate 41, and a screw part of the bolt 5 is screwed into the tap hole 3a of the support steel member 3.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a steel column having a closed cross-sectional shape and a column beam connection structure using the steel column.

  In Patent Document 1, a tap plate is arranged inside a steel column, an end plate fixed to the end of the beam is brought into contact with the outer surface of the column, and the end plate and the tap plate are bolted through the column. A column beam joint structure to be joined is disclosed.

  Patent Document 2 discloses that in a column-to-beam joining structure and method for joining an H-shaped steel beam to a column by an outer diaphragm, the outer diaphragm can be attached to the column without using welding. Yes.

JP-A-4-49343 JP 2017-36654 A

  However, in the column beam connection structure disclosed in Patent Document 1, the column is cut in order to configure the panel zone as a separate member, which has the disadvantage of increasing the cost of the column. In addition, in the column beam connection structure disclosed in Patent Document 2, it is not necessary to form a tapped hole or cut a column on the column, but to connect the divided outer diaphragms with bolts. There is a drawback that the member processing cost and production cost are expensive.

  A column-beam joining structure is known in which a tapped hole is formed in the column itself, and a bolt passed through an insertion hole formed in the end plate of the beam is screwed into the tapped hole. However, in this structure, the tap hole must be formed to some extent away from the rounded portion between the side surfaces of the column, and when there is such a distance, the bolt pulls the column and the end plate has a column. In both of the states of compressing, there is a possibility that a large load is applied to the rounded portion and it is deformed.

  In view of the above circumstances, the present invention eliminates the need to process the column itself, and even when there is a round portion between the side surfaces of the column, the steel column and the beam-column connecting structure that can suppress deformation of the round portion I will provide a.

  In order to solve the above-described problems, the steel pillar of the present invention is formed by joining a supporting steel material having a bolt fastening tap hole to a side surface of a steel pillar body having a closed cross section without using a bolt. It is characterized by being.

  If it is said structure, since the said support steel material is easily joined to a column main body by welding or adhesion | attachment, the production cost of a column can be reduced, for example. In addition, since no tapped hole is formed in the column itself, even if a rounded portion exists between the side surfaces of the column main body, the tapped hole is formed in the supporting steel material at a position close to the rounded portion without being affected by it. can do.

  The support steel material has a flat plate shape, and the tap hole may be formed in the horizontal direction toward the side surface of the column main body (hereinafter referred to as a first configuration in this section).

  The supporting steel material is formed by making the first plate portion and the second plate portion orthogonal to each other, the first plate portion is joined to the side surface of the pillar body in a vertical arrangement, and the second plate portion is arranged horizontally. The tap hole may be formed in the second plate portion in the vertical direction (hereinafter referred to as a second configuration in this section).

  In the second configuration, the tap steel is formed in the first plate portion in the horizontal direction toward the side surface of the column main body, or the support steel material having the first plate portion and the second plate portion. Alternatively, the tap hole may be formed in the second support steel material joined to the lower portion thereof in the horizontal direction toward the side surface of the column main body (hereinafter referred to as the third configuration in this section).

  The column beam connection structure of the present invention is characterized in that a bolt inserted through a bolt insertion hole of an end plate of the beam is screwed into a tap hole of the steel column having the first configuration.

  Moreover, the column beam connection structure of this invention is characterized in that a bolt inserted through a bolt insertion hole of a beam flange is screwed into a tap hole of the second plate portion of the steel column having the second configuration. And

  Further, the column beam connection structure of the present invention is formed in the horizontal direction by screwing a bolt inserted into the upper flange of the beam into the tap hole of the second plate portion of the steel column having the third configuration. A bolt inserted into a bolt insertion hole of a partial end plate provided on the lower side of the end of the beam is screwed into the tap hole.

  If it is this invention, it is not necessary to form a tap hole in pillar itself, and support steel materials can be easily joined to a pillar by non-bolt joining. And since no tapped hole is formed in the column itself, even if a rounded portion exists between the side surfaces of the column, the tapped hole is formed in the supporting steel material at a position close to the rounded portion without being affected by it. The deformation of the rounded portion can be made difficult to occur.

It is explanatory drawing explaining preparation of the steel pillar which concerns on embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows embodiment of this invention, Comprising: The same figure (A) is the top view which showed welding of the supporting steel material in the case of making a joint surface into one side surface, The same figure (B) is a joint surface. It is the top view which showed welding of the supporting steel materials in case two are adjacent side surfaces. The column beam connection structure concerning the embodiment of the present invention is shown, and the figure (A) is a schematic top view in the state where the end plate of the beam was joined to one joint face, and the figure (B). These are the schematic front views seen from the end plate side. It is explanatory drawing which shows the column beam junction structure which concerns on embodiment of this invention. In the column beam connection structure concerning the embodiment of the present invention, it shows the state where the end plate of the beam was joined to two joint surfaces which face backward, and the figure (A) is a top view and the figure (B) is a front view. It is explanatory drawing which shows the column beam junction structure which concerns on other embodiment of this invention. It is explanatory drawing which shows the column beam junction structure which concerns on other embodiment of this invention. It is explanatory drawing which shows the column beam junction structure which concerns on other embodiment of this invention.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
As shown in FIG. 1, the steel pillar 1 concerning this embodiment is provided with the pillar main body 2 which consists of a square steel pipe which has a closed cross section, and the flat support steel material 3, for example. The column body 2 has four side surfaces, and a rounded portion 2a exists between the side surfaces. Further, in this example, two adjacent surfaces of the column main body 2 are used as a joint surface, and the support steel material 3 is provided only on the joint surface. The support steel material 3 is provided in two on the top and bottom of each joint surface, and each support steel material 3 has four tap holes 3a for fastening bolts in the horizontal direction so as to be orthogonal to the side surface of the column body 2. Is formed. As an example, the thickness of the support steel material 3 and the depth of the tap hole 3a are 28 mm, and the screw portion of the bolt is inserted by using substantially the entire depth of the tap hole 3a. The width of the support steel material 3 is approximately the same as the width of the column main body 2.

  Moreover, the said support steel material 3 is joined to the said joint surface, without using a volt | bolt. Bonding without using bolts includes bonding with an adhesive and welding. In this example, welding is performed. As an example, as shown in FIG. 2A, the support steel material 3 is fillet welded to the side surface of the column main body 2. In addition, when two adjacent side surfaces of the column main body 2 are used as a joint surface, as shown in FIG. 2B, fillet welding is performed on one joint surface, and on the other joint surface, The welding which formed the groove | channel is performed. Of course, even when the support steel material 3 is welded to only one joint surface, groove welding may be performed, and groove welding and fillet welding can be mixed appropriately. By these weldings, the force is accurately transmitted at the rounded portion 2a. The said steel pillar 1 is produced in a factory, and is conveyed to a construction site.

  At the construction site, as shown in FIG. 3 (A), FIG. 3 (B) and FIG. 4, the end plate 41 in the beam 4 is fixed to the support steel material 3, so that the column beam connection structure which is an embodiment. Is built. For example, eight bolt insertion holes 41 a are formed in the end plate 41, and bolts 5 are inserted into the bolt insertion holes 41 a, and screw portions of the bolts 5 are screwed into the tap holes 3 a of the support steel material 3. Combined. As the bolt 5, for example, a double screw bolt with a pin tail is used. The pin tail is automatically cut when the bolt 5 is tightened with a specified torque.

  If it is said structure, since the said supporting steel material 3 is provided in the column main body 2 by welding, without using a volt | bolt, production costs etc. can be reduced. In addition, since the tap hole is not formed in the column itself, even if the rounded portion 2a exists between the side surfaces of the column main body 2, the tap hole 3a is supported at a position close to the rounded portion without being affected by the rounded portion 2a. The steel material 3 can be formed. Of course, the steel pillar 1 can also be used in a structure in which the rounded portion is not formed on the pillar body.

  When two support steel materials 3 are provided on the upper and lower sides, as shown in FIGS. 5 (A) and 5 (B), two beams having different heights (beams) from the steel column 1 are provided. Even when 4 are connected in different steps, it is possible to easily cope with this by simply changing the arrangement interval of the two support steel materials 3. In addition, when the support steel material 3 is divided and provided in this way, the number of welding points increases, so that the fixing strength of the support steel material 3 with respect to the column main body 2 can be increased.

  In addition, when adopting a one-piece configuration in which the support steel material 3 is not divided into two pieces, the above advantage cannot be obtained, but the advantage that the accuracy of the formation position of the tap hole 3a can be increased. become.

  Next, other embodiments will be described. As shown in FIG. 6, in the steel column 1 </ b> A of this embodiment, two support steel materials 3 </ b> A are provided on the upper and lower sides on the side surface serving as the joint surface. Each supporting steel material 3A has an L shape in which the first plate portion 31 and the second plate portion 32 are orthogonal to each other. The first plate portion 31 of each supporting steel material 3A is joined to the side surface of the column main body 2 by welding in a vertical arrangement. Further, the upper support steel material 3A has the second plate portion 32 horizontally positioned on the upper side, and the lower support steel material 3A has the second plate portion 32 horizontally positioned on the lower side. The distance between the upper and lower second plate portions 32 matches the height of the beam 4 (beam beam). Each of the second plate portions 32 has the tap hole 3a formed in the vertical direction.

  In the beam-column connection structure using the steel column 1A, the beam 4 is not provided with the end plate 41, and the bolt insertion hole 42a is formed in the vertical direction on the end side of the upper and lower flanges 42. Yes. Then, the bolt 5 inserted through the bolt insertion hole 42a of the flange 42 is screwed into the tap hole 3a of the second plate portion 32 of the support steel material 3A.

  Even in such a configuration, it is not necessary to process the column itself, and the support steel material 3A is provided on the column main body 2 by welding without using a bolt, so that the manufacturing cost and the like of the steel column 1A can be reduced. it can.

  Next, other embodiments will be described. As shown in FIG. 7, in the steel column 1 </ b> B of this embodiment, the support steel material 3 </ b> A and the second support steel material 30 are provided one above the other on the side surface serving as the joint surface. Although the said 2nd support steel material 30 is taken as the same structure as the said support steel material 3, it is not restricted to this. The second support steel material 30 and the first plate portion 31 of the support steel material 3A are joined to the side surface of the column body 2 by welding in a vertical arrangement. The second plate portion 32 of the support steel material 3A is positioned horizontally on the upper side.

  In the beam-column connection structure using the steel column 1B, the beam 4 is provided with a partial end plate 41A in the lower half. Then, the bolt 5 passed through the bolt insertion hole 41 a provided in the partial end plate 41 A is screwed into the tap hole 3 a of the support steel material 3. Further, a bolt insertion hole 42a is formed in the vertical direction on the end side of the upper flange 42, and the bolt 5 inserted from the bolt insertion hole 42a into the tap hole 3a of the second plate portion 32 of the support steel material 3A. Are screwed together.

  Even in such a configuration, the column itself is not required to be processed, and the second support steel material 30 and the support steel material 3A are provided on the column main body 2 by welding without using bolts, so that the steel column 1B is manufactured. Cost and the like can be reduced. Further, regarding the joining of the second supporting steel material 30, since the tap hole is not formed in the column itself, even if the round portion 2 a exists between the side surfaces of the column main body 2, the tap is not affected by the tap portion. The hole 3a can be formed in the support steel material 3 at a position close to the rounded portion.

  Further, when the second plate portion 32 of the support steel material 3A is horizontally disposed on the upper side, for example, when a floor slab such as ALC is disposed, the side surface of the floor slab is disposed so as to contact the side surface of the column body 2 Easy to do. It should be noted that the front end of the bolt 5 does not protrude from the upper surface of the second plate portion 32. Further, while omitting the second support steel material 30, the length of the first plate portion 31 of the support steel material 3 </ b> A is lengthened, and the tap hole 3 a is formed in the lengthened first plate portion 31. Also good.

  Next, other embodiments will be described. As shown in FIG. 8, in the steel column 1 </ b> C of this embodiment, two support steel materials 3 </ b> B are provided on the upper and lower sides on the side surface serving as the joint surface. Each support steel material 3B has a T-shape in which the first plate portion 31 and the second plate portion 32 are orthogonal to each other. The first plate portion 31 of each support steel material 3B is joined to the side surface of the column main body 2 by welding in a vertical arrangement, and the second plate portion 32 is positioned horizontally. The distance between the upper and lower second plate portions 32 matches the height of the beam 4 (the beam beam). The tap hole 3a is formed in the second plate portion 32 in the vertical direction.

  In the beam-column connection structure using the steel column 1C, the beam 4 is not provided with the end plate 41, and the bolt insertion hole 42a is formed in the vertical direction on the end side of the upper and lower flanges 42. Yes. Then, the bolt 5 inserted into the bolt insertion hole 42a of the upper and lower flanges 42 is screwed into the tap hole 3a of the second plate portion 32 of the support steel material 3B.

  Even in such a configuration, the column itself is not required to be processed, and the support steel material 3B is provided on the column main body 2 by welding without using a bolt, so that the production cost of the steel column 1C can be reduced. .

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

1: Steel column 1A: Steel column 1B: Steel column 1C: Steel column 2: Column body 2a: Earl part 3: Support steel material 30: Second support steel material 3A: Support steel material 3B: Support steel material 3a: Tap Hole 4: Beam 5: Bolt 31: First plate portion 32: Second plate portion 41: End plate 41a: Bolt insertion hole 41A: Partial end plate 42: Flange 42a: Bolt insertion hole

Claims (7)

  A steel column in which a support steel material in which a tap hole for bolt fastening is formed is joined to a side surface of a steel column main body having a closed cross section without using a bolt.   The steel column according to claim 1, wherein the support steel material has a flat plate shape, and the tap hole is formed in a horizontal direction toward a side surface of the column main body.   2. The steel pillar according to claim 1, wherein the support steel material has a first plate portion and a second plate portion orthogonal to each other, and the first plate portion is joined to a side surface of the column main body in a vertical arrangement, A steel column, wherein the second plate portion is disposed horizontally, and the tap hole is formed in the second plate portion in the vertical direction.   The steel column according to claim 3, wherein the tap hole is formed in the first plate portion in a horizontal direction toward a side surface of the column main body, or the first plate portion and the second plate portion. A steel column, wherein the tap hole is formed in a horizontal direction toward a side surface of the column main body in a second support steel material joined to a lower portion thereof separately from the support steel material having the above.   A beam-to-column connection structure, wherein a bolt inserted into a bolt insertion hole of an end plate of a beam is screwed into a tap hole of a steel column according to claim 2.   A beam-to-column connection structure, wherein a bolt inserted into a bolt insertion hole of a beam flange is screwed into a tap hole of a second plate portion of the steel column according to claim 3.   The bolt inserted into the upper flange of the beam is screwed into the tap hole of the second plate portion of the steel column according to claim 4, and the lower side of the end of the beam is inserted into the tap hole formed in the horizontal direction. A beam-to-column connection structure in which a bolt inserted into a bolt insertion hole of a partial end plate provided in the screw is screwed.

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