JP2022164551A - building material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve conveyance easiness and site workability of a joint to be used for a column-beam structure of a steel frame building.

SOLUTION: A joint 30 for coupling a lower floor pillar 20 and an upper floor pillar 40 comprises: a frame body 31; a bolt 341 penetrating a frame body side surface; and a solid part 36 obtained by filling expansive concrete inside the frame body and curing the expansive concrete. A composite beam 50 comprises: a beam body made from H-shaped steel; and a connection plate 55 welded to each of both ends in an extension direction of the beam body. On the connection plate 55 is formed an open hole 56 for penetration of a bolt. The joint 30 is fixed to an upper end of the lower floor pillar 20. The bolt 341 is then penetrated through the open hole 56 of the connection plate 55, and a nut 35 is fitted to the bolt. After that, the connection plate 55 and the frame body 31 are welded and joined. The side surface of the frame body 31 is flat except for the portion where the tip of the bolt protrudes from the side surface.

SELECTED DRAWING: Figure 3

COPYRIGHT: (C)2023,JPO&INPIT

Description

TECHNICAL FIELD The present invention relates to a building member, and more particularly to a building member used for a beam-to-column structure of a steel frame building.

As an example of a column-beam structure using square steel pipe columns, Patent Document 1 describes, "In a column-beam structure of a plate-shaped building, a plurality of exclusive parts are arranged in the girder direction on each floor of the hierarchical structure. An inter-beam steel beam extending in the inter-beam direction, a girder steel beam extending in the girder direction, and a reinforced concrete column extending in the height direction and to which the inter-beam steel beam and the girder steel beam are joined (summary excerpt)” is disclosed. It is

In a steel-frame building, a conventional construction method uses a column joint as disclosed in Patent Document 1 at a non-joining portion between a column and a beam. FIG. 6 is a diagram showing a beam-column structure 200 by a conventional construction method. Figure 7
is a schematic diagram of a column joint 220 used in the conventional construction method disclosed in Non-Patent Document 1. FIG.

As shown in FIG. 6, in the conventional beam-to-column structure 200, the upper end of the lower story column 210u and the lower end of the column joint 220, and the upper end of the column joint 220 and the upper story column 210t are welded at the construction site. , constitute the column 210 . The name of the lower floor pillar 210u and the upper floor pillar 210t is the column joint 220 of interest.
are referred to as lower floors and upper floors. Therefore, if the column joint 220 of interest changes, the names of the lower floor and the upper floor also change. A plurality of pillars 210 are erected at intervals in the horizontal direction (in FIG. 6, the inter-beam direction (Z direction)) in the structure, and the beams 25 extending in the inter-beam direction (Z direction).
concatenated by 0.

As shown in FIG. 7, the column joint 220 includes a panel portion 221 made of a steel pipe and a panel portion 22
1 and an upper diaphragm 222t welded to the upper end of the panel portion 221. As shown in FIG. Furthermore, the column joint 220 includes one or more and four or less brackets 230 for joining beams.

The column-to-beam joining process by the conventional method will be described with reference to FIGS. 8, 9 and 10. FIG. Figure 8
4] is an exploded enlarged view showing the joining process of the column joint 220 and the beam 250. [FIG. FIG. 9 is a partially enlarged explanatory view showing a state in which the joint processing between the column joint 220 and the beam 250 is completed. Figure 10 shows
FIG. 11 is a partially enlarged side view showing a state in which the joint processing between the column joint 220 and the beam 250 is completed;

The bracket 230 is made of H-beam steel and includes a lower flange 231u, an upper flange 231t, and a web 232 perpendicular to the lower flange 231u and the upper flange 231t. lower flange 23
1 u is welded to the lower diaphragm 222 u, the upper flange 231 t is welded to the upper diaphragm 222 t, and the web 232 is welded to the panel portion 221 .

The column joint 220 is shipped after the bracket 230 is welded to the lower diaphragm 222u, the panel portion 221, and the upper diaphragm 222t at the factory.

At the construction site, a beam 250 made of H-shaped steel is joined to the bracket 230 . Specifically, the lower splice plate (large) 240u and the lower splice plate (small) 240uh1, 240uh2 having half widths of the lower splice plate (large) 240u are used to form the lower flange 231u of the bracket 230 and the lower flange of the beam 250. 251u is sandwiched and fastened with a high-strength bolt 260. As shown in FIG. Similarly, an upper splice plate (large) 240t and an upper splice plate (small) 240th1, 240 having a half width of the upper splice plate (large) 240t
Using th2, the upper flange 231t of the bracket 230 and the upper flange 25 of the beam 250
1t is sandwiched and fastened with a high-strength bolt 260 . Additionally, web 232 of bracket 230
and the web 252 of the beam 250 are two lateral splice plates 240w1, 240w2
are used to sandwich the web 232 of the bracket 230 and the web 252 of the beam 250 along the plate thickness direction, and fastened with high-strength bolts 260 . Bracket 230, beam 250, upper splice plate (large) 240t, upper splice plate (small) 240th1, 240t
h2, lower splice plate (large) 240u, lower splice plate (small) 240uh1
, 240uh2 and the lateral splice plates 240w1, 240w2 are welded.

Thus, in the column-beam structure 200 according to the conventional construction method, the bracket 230 is welded to the column joint 220 in advance, thereby connecting the lower floor column 210u and the upper floor column 210t via the column joint 220, and attaching the beam to the bracket 230. By joining the pillars 250, a rigid joint connecting the columns and the beams 250 is realized.

JP 2017-155415 A

https://seko-kanri. com/diaphragm/

In the conventional column joint 220, the bracket 230 consists of the panel portion 221 and the lower diaphragm 222.
u, because it protrudes from the upper diaphragm 222t, when transporting the column joint 220 from the factory to the construction site, it is difficult to place the column joint 220 in parallel on the platform of the transport vehicle or stack it up, making it difficult to transport. There is a problem.

Furthermore, when joining the beams 250 to the column joint 220, the lower splice plate (large) 240u and the lower splice plates (small) 240uh1, 240u are used to join one beam 250.
h2, upper splice plate (large) 240t, upper splice plate (small) 240th1
, 240th2, the side splice plates 240w1 and 240w2, the bracket 230 and the beam 250 must be welded, and there is a problem that there are many welding points.

In order to join one beam 250, a lower splice plate (large) 240u, lower splice plates (small) 240uh1 and 240uh2, and an upper splice plate (large) 240
t, the upper splice plates (small) 240th1, 240th2, and the side splice plates 240w1, 240w2 are required.

In addition, it is preferable that the column joint 220 has a high rigidity against the force applied from the beam 250 . In the column joint 220, the lower diaphragm 222u and the upper diaphragm 222t are used to increase the rigidity, but since the panel section 221 is configured using a steel pipe column, there is room for further improvement.

The present invention has been made in view of the above problems and circumstances, and aims to improve transportability and construction workability, improve the rigidity of column joints, and reduce the number of parts required for column-to-beam joints. do.

In order to solve the above problems, the present invention has the configuration described in the claims. As an example, the present invention relates to a building member used for a column-beam structure of a building,
a hollow rectangular parallelepiped frame made of square steel pipe;
an inner bottom surface provided inside the frame;
A first bolt penetrating a pair of opposing side surfaces of the four side surfaces of the frame with both ends protruding from the frame, and a remaining pair of opposing side surfaces of the four side surfaces of the frame. a second bolt penetrating the side surface of the frame with both ends protruding from the frame;
a solid portion filled with expansive concrete inside the frame and hardened,
A thread groove is formed at each tip of the first bolt and the second bolt,
The side surface of the frame is formed flat except for the portion where the tip of the first bolt and the tip of the second bolt protrude from the side surface.
It is characterized by

According to the present invention, it is possible to improve transportability and construction workability, improve the rigidity of column joints, and reduce the number of parts required for column-to-beam joints. Objects, configurations, and effects other than those described above will be clarified in the following embodiments.

The figure which shows the beam-column structure which concerns on this embodiment. The figure which shows a part of construction procedure of column beam structure. Exploded explanatory view of the joint. FIG. 3 is a partially enlarged view of the joint of the beam of the joint (side view); FIG. 3 is a partially enlarged cross-sectional view of a joint portion of a joint with a beam (side view); The figure which shows the beam-column structure by the conventional construction method. Schematic diagram of a column joint used in a conventional construction method. The exploded enlarged view which shows the joining process of a column joint and a beam. FIG. 4 is a partially enlarged explanatory view showing a state in which joining processing between a column joint and a beam is completed; FIG. 4 is a partially enlarged side view showing a state in which the joint processing between the column joint and the beam is completed;

Embodiments of the present invention will be described below with reference to the drawings. The same reference numerals are given to the same components throughout the drawings, and redundant explanations will be omitted.

<Column beam structure>
FIG. 1 is a diagram showing a beam-column structure 100 according to this embodiment. FIG. 2 is a diagram showing a part of the construction procedure of the beam-column structure 100. As shown in FIG.

A beam-to-column structure 100 shown in FIG. 1 is a structure used in a steel frame building. Column beam structure 1
In 00, lower floor pillars 20a and 20b made of square steel pipes are erected on foundations 10a and 10b, respectively. The inter-beam direction (Z direction) is a composite beam 50a, and upper floor columns 40a and 40b made of square steel pipes are erected at the upper ends of joints 30a and 30b, respectively.

As shown in FIG. 2, joints 30a and 30b have composite beams 50b also in the girder direction (X direction).
are concatenated. The joint between the lower floor pillar 20a and the joint 30 and the joint between the upper floor pillar 40a and the joint 30 are fixed by welding. The joint 30a connects the lower floor pillar 20a and the upper floor pillar 40
It is formed in the shape of a prism which is approximately equal to the outer diameter of a (the thickness may be considered to be the same, and the outer diameter may differ within a predetermined allowable range). Since the joint 30a and the joint 30b are the same member, the joints 30a and 30b and the composite beams 50a and 50b will be referred to as the joint 30 and the composite beam 50 unless it is necessary to distinguish them.

FIG. 3 is an exploded explanatory view of the joint 30. FIG. FIG. 4 is a partially enlarged view (side view) of the joint portion of the composite beam 50 of the joint 30. As shown in FIG. FIG. 5 is a partially enlarged cross-sectional view (side view) of the joint portion of the composite beam 50 of the joint 30. As shown in FIG.

As shown in FIG. 3, the joint 30 includes a frame 31 made of steel pipe and an inner bottom surface 32 (see FIG. 5) provided inside the frame 31. As shown in FIG.

The plate thickness d2 (see FIG. 5) of the frame 31 is the plate thickness d1 (see FIG. 5) of the lower pillar 20a and the upper pillar 40a.
(see reference). The above definition of "more than twice" is to comply with the requirements of the Building Standards Law, and the ratio of the plate thickness d2 of the joint 30 to the plate thickness d1 of the steel pipe column is changed as appropriate in accordance with the revision of the Building Standards Law. be done.

Each side surface 331 , 332 , 333 , 334 of the frame 31 is provided with a total of six through holes arranged in two rows and three stages. A total of six bolts 341 are passed through the through holes of the opposing side surfaces 331 and 333 . Similarly, a total of six bolts 342 are passed through the through holes of the side surfaces 332 and 334 facing each other. Since the bolts 341 and 342 intersect inside the frame 31, they are arranged so as to pass through the frame 31 by changing their positions in the height direction so as not to interfere with each other. The bolts 341 and 342 correspond to first and second bolts.

Both ends of the bolts 341 and 342 protrude outward from the frame 31 . The ends of the bolts 341 and 342 are threaded, and the nuts 35 are detachably fitted therein. A total of 24 nuts 35 are attached to the ends of the bolts 341 and 342 . When the joint 30 is shipped, the nuts 35 are fitted to the bolts 341 and 342 when shipped.

12 bolts 341 and 342 are passed through the frame 31, and the joint 30 is attached to the frame 31.
1 is filled with expansive concrete and hardened to form a solid portion 36 . By filling the inside of the frame 31 with expansive concrete, the inner surface of the frame 31 restricts expansion of the expansive concrete during the hardening process, and a gap is less likely to occur between the frame 31 and the solid portion 36 . The solid portion 36 applies an outward force to the inner surface of the frame 31 , thereby suppressing deformation of the frame 31 due to the force received from the composite beam 50 . That is, it is possible to improve the rigidity against the force applied to the joint 30 from the composite beam 50 without using the flat diaphragm used for the column joint 220 of the conventional construction method.

The composite beam 50 is formed by previously welding a beam body 53 made of H-shaped steel and joint plates 55 orthogonal to the extension direction to both ends of the beam body 53 in the extension direction. beam body 53
includes a web 52 and an upper flange 51t and a lower flange 51u facing each other with the web 52 interposed therebetween.

The connection plate 55 is made of an iron plate and welded to the upper flange 51t, the web 52, and the lower flange 51u.

The connection plate 55 has six bolt holes 56 for passing bolts 341 or 342 protruding from the side surface 331 of the frame 31 . Since the bolts 341 and 342 are provided in the joint 30 with different positions in the height direction, the positions of the bolt holes 56 are also changed accordingly. Therefore, the position of the bolt hole 56 provided in the joint plate 55 differs between the composite beam 50 joined to the side surfaces 331 and 333 of the joint 30 and the composite beam 50 joined to the side surfaces 332 and 334 of the joint 30 . For convenience of explanation, in FIG.
Illustration of the upper flange 51t, the web 52, and the lower flange 51u is omitted.

A construction method of a building including the beam-column structure 100 according to the present embodiment will be described. At the factory, building members including joints 30 and composite beams 50 are manufactured, and these building members (building member kits) are brought to the construction site.

The joint 30 is made by pouring expansive concrete into the frame 31 with the bolts 341 and 342 penetrating the frame 31 and hardening it. The bolts 341 and 342 are shipped with the nuts 35 fitted thereon.

The composite beam 50 is shipped after welding connection plates 55 to both ends of a beam body 53 made of H-section steel.

The construction method (joining process of the joint 30 and the composite beam 50) at the construction site is as follows.
(1) Weld the joint 30 to the upper end of the lower floor pillar 20 .
(2) Remove the nut 35 fitted on the bolt 341 .
(3) The connection plate 55 of the composite beam 50 is opposed to the side surface 331 of the joint 30 , and bolts 311 are passed through the bolt holes 56 of the connection plate 55 to attach the connection plate 55 to the side surface 331 of the frame 31 .
31.
(4) Fit the nut 35 onto the bolt 341 .
(5) Weld the connection plate 55 and the joint 30 together.
(6) Weld the upper floor pillar 40 to the upper end of the joint 30 .

Therefore, as shown in FIGS. 4 and 5, the nut 35 is fitted to the bolt 341 with the joint plate 55 interposed therebetween.

According to this embodiment, the joint 30 can be configured to have an outer diameter shape based on the frame 31 with the bolts 341 and 342 projecting slightly. Therefore, the joint 30 can be formed in a substantially rectangular parallelepiped shape, can be loaded on a vehicle or can be loaded side by side, and transportation efficiency can be improved.

Furthermore, in the conventional construction method, when welding the composite beam 50 to the column joint 220 as shown in FIGS.
40u2, upper splice plate (large) 240t, upper splice plate (small) 240t
1, 240t2, weld lateral splice plates 240w1, 240w2 to bracket 230 and beam 250, respectively. In contrast, according to the present embodiment, the four sides of the joint plate 55 of the composite beam 50 can be welded to the joint 30 without using a splice plate. Therefore, compared with the conventional construction method, it is possible to reduce the number of joint metal fittings when joining columns and beams, and further reduce the number of welding points when joining columns and beams, thereby improving construction workability.

The above embodiment merely represents one embodiment of the present invention, and various modifications that do not depart from the gist of the present invention are included in the present invention.

For example, the number of bolts 341 and 342 provided on the frame 31 is not limited to six on one side surface of the frame 31 .

In addition, the present invention includes a column member made of square steel pipes constituting the lower floor column 20 and the upper floor column 40, an H-shaped steel (beam steel material) provided with joint plates 55 at both ends in the extending direction, and a joint 30. Each building member such as the building member kit, the joint 30, and the composite beam 50 is included in the scope of rights of the building member according to the present invention. The present invention also includes a building including a beam-to-column structure 100 using joints 30 and composite beams 50, and a construction method thereof.

10a, 10b: foundations 20, 20a, 20b: lower pillars 30, 30a, 30b: joints 31: frame 32: inner bottom surface 35: nuts 36: solid portions 40, 40a, 40b: upper pillars 50, 50a, 50b : Composite beam 51t : Upper flange 51u : Lower flange 52 : Web 53 : Beam body 55 : Connection plate 56 : Bolt hole 100 : Column beam structure 200 : Column beam structure (conventional method)
210: Column 210t: Upper floor column 210u: Lower floor column 220: Column joint 221: Panel part 222t: Upper diaphragm 222u: Lower diaphragm 230: Bracket 231t: Upper flange 231u: Lower flange 232: Web 240t: Upper splice plate (large )
240th1, 240th2: Upper splice plate (small)
240u: lower splice plate (large)
240uh1, 240uh2: lower splice plate (small)
240w1, 240w2: Lateral splice plate 250: Beam 251t: Upper flange 251u: Lower flange 252: Web 260: High-strength bolt 311: Bolts 331, 332, 333, 334: Sides 341, 342: Bolts A, B: Area d1 , d2: plate thickness wl: welded portion

In order to solve the above problems, the present invention has the configuration described in the claims. As an example, the present invention relates to a building member used for a beam-column structure of a building, comprising a hollow rectangular parallelepiped frame made of square steel pipes, and an inner wall provided inside the frame. A first bolt penetrating a bottom surface and a pair of opposing side surfaces of the four side surfaces of the frame with both ends protruding from the frame, and the remaining one of the four side surfaces of the frame. second bolts penetrating opposite side surfaces of the frame with both ends protruding from the frame ; The expansive concrete is brought into contact with the inner surface of the frame, thread grooves are formed at the ends of the first bolt and the second bolt, and the side surface of the frame is formed by the first bolt on the side surface. It is characterized in that the tip and the tip of the second bolt protrude , and do not include a plate-shaped member that protrudes in a direction perpendicular to the height direction of the frame .

Claims (2)

A building member used for the beam-column structure of a building,
a hollow rectangular parallelepiped frame made of square steel pipe;
an inner bottom surface provided inside the frame;
A first bolt penetrating a pair of opposing side surfaces of the four side surfaces of the frame with both ends protruding from the frame, and a remaining pair of opposing side surfaces of the four side surfaces of the frame. a second bolt penetrating the side surface of the frame with both ends protruding from the frame;
a solid portion filled with expansive concrete inside the frame and hardened,
A thread groove is formed at each tip of the first bolt and the second bolt,
The side surface of the frame is formed flat except for the portion where the tip of the first bolt and the tip of the second bolt protrude from the side surface.
A building member characterized by: A building member according to claim 1,
The first bolt and the second bolt are provided at different positions in the height direction of the building member,
A building member characterized by:

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