JP7178898B2 - building frame - Google Patents

Description

The present invention relates to a building frame using a steel frame.

Similar to reinforced concrete structures and steel-framed reinforced concrete structures, steel frame structures are characterized by being able to take larger spans in both the girder direction and the span direction compared to wooden structures. However, the larger the span, the lower the rigidity of the beam, and the increased floor area borne by the beam increases its weight, making it easier for both columns and beams to bend. For example, in buildings such as warehouses and commercial buildings, the span of the beams in the direction between the beams tends to be longer than in the direction of the girder. becomes easy to bend in that direction.

In order to deal with such problems, it is common to increase the size of columns such as square steel pipes.

In addition, Patent Literature 1 discloses another structure for increasing the strength of the column. The invention described in this document assumes an H-beam steel column. For this reason, the column has a strong axis direction, which is the surface direction of the web, and a weak axis direction, which is perpendicular to this direction. In the invention described in Patent Document 1, a core column made of a square steel pipe or a round steel pipe is provided in the middle of the web to increase the cross-sectional strength in the direction of the weak axis, thereby obtaining a column that is resistant to buckling (Document 1). paragraphs [0008] [0010] [0011]).

JP-A-2005-320746

If, for example, the size of the square steel pipe is increased in order to increase the rigidity of the pillar, the area of the pillar protruding into the room increases accordingly. For example, buildings such as warehouses and commercial buildings, in which the span in the beam direction is longer than that in the girder direction and the openings are installed in the beam direction, are widely seen. In the case of such a building, if the size of the pillars is increased in order to increase the rigidity, the area of the pillars protruding into the room increases, narrowing the interior space. This is where some kind of countermeasure is required.

In this regard, Patent Literature 1 discloses a steel frame column in which the strength in the direction of the weak axis of H-shaped steel is increased, as described above. However, since this steel frame column has a structure in which "a mounting plate is installed directly on the beam and tightened with bolts, etc." (see paragraph [0021] of Document 1), the length of the span between the columns increases Do not configure a frame that suppresses the deflection that occurs in the

It is desirable to provide the columns with rigidity that can suppress deflection that occurs as the span between the columns increases without protruding too much into the room .

One aspect of the frame structure of a building includes steel pipes that form part of columns, beams that span between the steel pipes, and a surface that forms the steel pipes and spans the beams. a stiffening column extending from the steel pipe on an imaginary plane passing through the surface forming the steel pipe on the opposite side thereof, and arranged along the longitudinal direction of the steel pipe to form another part of the column; wherein the stiffening column forms a surface forming the steel pipe over which the longer beam of the two beams extending in directions perpendicular to each other from the column and the steel pipe on the opposite side are formed. It is arranged on a virtual plane that passes through the plane that
Another aspect of the building frame includes steel pipes that form part of columns, beams that span between the steel pipes, and a surface that forms the steel pipes and spans the beams. A stiffening column extending from the steel pipe on an imaginary plane passing through and a surface forming the steel pipe on the opposite side, and arranged along the longitudinal direction of the steel pipe and forming another part of the column and wherein the stiffening column has a surface forming the steel pipe over which the longer one of the two beams extending in mutually orthogonal directions from the column and the steel pipe on the opposite side thereof. and the stiffening columns are provided in pairs, each extending from the steel pipe forming face and the opposite steel pipe forming face. .
Another aspect of the building frame includes steel pipes that form part of columns, beams that span between the steel pipes, and a surface that forms the steel pipes and spans the beams. A stiffening column extending from the steel pipe on an imaginary plane passing through and a surface forming the steel pipe on the opposite side, and arranged along the longitudinal direction of the steel pipe and forming another part of the column and wherein the stiffening column has a surface forming the steel pipe over which the longer one of the two beams extending in mutually orthogonal directions from the column and the steel pipe on the opposite side thereof. and the stiffening column is joined only to one side of the steel pipe.

Since there are no stiffening columns in the direction perpendicular to the direction in which stiffening is required, the columns do not protrude greatly into the room in that direction, and the columns are rigid enough to suppress the deflection that occurs as the span between the columns increases. can be given to

The top view which shows an example of a part of frame of the building of this Embodiment. The side view which shows an example of a part of frame of the building of this Embodiment. The top view which shows the one aspect|mode of the column which has a stiffening column. FIG. 4 is a perspective view showing a peripheral structure of a diaphragm that the pillars in the first row have. The perspective view which shows the peripheral structure of the diaphragm which the pillar of the second row has. The top view of the column which has a stiffening column shown in comparison with the column of a reference example. The top view which shows another one aspect|mode of the column which has a stiffening column. The top view which shows another one aspect|mode of the column which has a stiffening column. The top view which shows another one aspect|mode of the column which has a stiffening column. The top view which shows another one aspect|mode of the column which has a stiffening column. The top view which shows another one aspect|mode of the column which has a stiffening column. The perspective view which shows another example of the peripheral structure of the diaphragm which a column has. The perspective view which shows another example of the peripheral structure of the diaphragm which a column has.

Embodiments will be described with reference to the drawings.

As shown in FIGS. 1 and 2, the building frame 101 of the present embodiment includes a plurality of pillars 111, and beams 131 are bridged between two of these pillars 111. is provided with a stiffening column 151. The frame 101 has the left span in FIGS. 1 and 2 as the span of the opening O provided in the building.

In FIG. 2 , the left side is the front side of the building having the frame 101 . In the framework 101, the pillars 111 in the third row are larger in size than the pillars 111 in the second row from the front side. For convenience of explanation, the pillars 111 in the first row are denoted as 111A, the pillars 111 in the second row as 111B, and the pillars 111 in the third row as 111C.

Columns 111A and 111B in the first and second rows are composed of steel pipes 112 and stiffening columns 151 . The steel pipe 112 forms part of the columns 111A and 111B, and the stiffening column 151 forms another part of the columns 111A and 111B. The stiffening column 151 is not provided on the column 111C of the third row.

The frame 101 has a structure that is longer in the Y direction than in the X direction shown in FIG. Therefore, the X direction is the inter-beam direction, and the Y direction is the longitudinal direction. The span of the frame 101 is determined by the pillars 111 in both the cross-beam direction X and the girder direction Y. In the frame 101, the span of the beam 131 in the inter-beam direction X is longer than that in the beam direction Y. As another embodiment, the span of the beam 131 may be shorter in the inter-beam direction X than in the longitudinal direction Y.

Due to such a structure, the beam 131a extending in the inter-beam direction X has lower rigidity than the beam 131b extending in the longitudinal direction Y, and the floor area borne by it increases, so the weight increases. increase the moment applied to As a result, the pillar 111 bridging the beam 131a is more likely to flex, and is required to have sufficient rigidity to support the beam 131a without flexing.

In the present embodiment, the column 111 is provided with the stiffening column 151 to increase the geometrical moment of inertia and stiffen the column 111 .

As shown in FIG. 3, the steel pipe 112 forming part of the column 111 is made of, for example, a cold-formed rectangular steel pipe. A stiffening column 151 is fixed to each of the two surfaces of the steel pipe 112 . The stiffening column 151 is a steel member having a T-shaped cross section extending from the column 111 and turning in two directions at right angles, and forms another part of the column 111 as described above. The portion extending from the steel pipe 112 is the base 152 of the stiffening column 151 . This base 152 is on a virtual plane vs (indicated by a dashed line in FIG. 3) passing through a plane 113a over which the beam 131a having the longer span is bridged and a plane 113b on the opposite side of the four planes of the steel pipe 112. located in A pair of stiffening columns 151 are provided and joined to the two surfaces 113a and 113b of the steel pipe 112 by welding. The stiffening column 151 having such a structure is provided along the entire length of the steel pipe 112 as an example. The steel pipe 112 and the stiffening column 151 work together to perform the original function of the column 111, which is to support the load of the structure (see FIG. 2).

As shown in FIGS. 1 and 2, the pillars 111A in the first row are connected to the beam 131a with the longer span on the side of the plane 113a through which the virtual plane vs (see FIG. 3) passes. The beam 131b with the shorter span is connected to the surface side of the pillar 111A perpendicular to the virtual surface vs.

As shown in FIGS. 1 and 2, in the second column 111B, a beam 131a with a longer span is connected to a surface 113a through which the virtual plane vs passes and a surface 113b on the opposite side. The beam 131b with the shorter span is connected to the surface side of the pillar 111A perpendicular to the virtual surface vs.

As shown in FIGS. 1 and 2, the column 111 has a diaphragm 114 at the joint with the beam 131 to join the steel pipe 112 to the upper and lower surfaces. The peripheral structure of the diaphragm 114 is different between the pillars 111 in the first row and the pillars 111 in the second row.

As shown in FIG. 4 , the columns 111 A in the first row divide the steel pipe 112 by the length of the arrangement interval of the upper and lower beams 131 and join the divided steel pipes 112 to the upper and lower surfaces of the diaphragm 114 .

Of the set of stiffening columns 151 provided on the column 111 , one of the stiffening columns 151 facing the rear side of the building is similarly divided and joined to the upper and lower surfaces of the diaphragm 114 . On the other hand, the stiffening column 151 facing the front side of the building is not divided and is directly joined to the surface 113a of the column 111A connecting the beam 131a having the longer span and the surface 113b opposite to the surface 113a. A pair of these stiffening columns 151 are positioned at the widthwise center of the columns 111A in the first row.

As described above, diaphragm 114 is provided at the joint with beam 131 . Therefore, to the diaphragm 114, a beam 131a with a longer span and a beam 131b with a shorter span are also joined.

As shown in FIG. 5 , in the second column 111 B, the steel pipe 112 is divided by the length of the arrangement interval of the upper and lower beams 131 , and the divided steel pipe 112 is joined to the upper and lower surfaces of the diaphragm 114 . A set of stiffening columns 151 provided on the columns 111 are similarly divided and joined to the upper and lower surfaces of the diaphragm 114 . A pair of these stiffening columns 151 are positioned at the widthwise center of the columns 111A in the first row.

As described above, diaphragm 114 is provided at the joint with beam 131 . Therefore, to the diaphragm 114, a beam 131a with a longer span and a beam 131b with a shorter span are also joined.

In the peripheral structure of the diaphragm 114 provided in the first column 111A shown in FIG. 4 and the second column 111B shown in FIG. For example by welding.

In such a configuration, since the frame 101 has a longer span in the inter-beam direction X, the beam 131a extending in the inter-beam direction X is heavier than the beam 131b extending in the girder direction Y. The moment applied to the supporting column 111 is increased. At this time, the increase in the moment applied to the column 111 occurs in the direction in which the beams 131a extending in the inter-beam direction X are connected. On the other hand, the frame 101 is provided with stiffening columns 151 in this direction to enhance rigidity. This prevents the pillars 111 from bending, which in turn prevents the beams 131 from bending.

FIG. 6 is a plan view for comparing the column 111 having the stiffening column 151 of this embodiment with a comparative example. In FIG. 6, the column 111 of this embodiment is shown on the upper side, and the large column 111D is shown on the lower side as a reference example. Employment of the large pillar 111D is a method that is conventionally and often used to increase the rigidity of the pillar 111 .

As shown in FIG. 6, the pillar 111 of this embodiment protrudes into the room by L1 in the span direction of the opening O of the building between adjacent pillars 111 . This amount of protrusion is the same as the original amount of protrusion of the column 111 including the diaphragm 114 . This is because the stiffening column 151 added to the column 111 is provided in a direction orthogonal to the span direction of the opening O.

On the other hand, when the large pillar 111D is provided to increase the rigidity of the pillar 111, the projection dimension to the interior side is L2. The dimension L2 is greater than the projection dimension L1 into the room provided by the column 111 of this embodiment. This is because the large pillar 111D enlarges the pillar 111 in all directions.

As is clear from the above, according to the present embodiment, the pillars 111 can be provided with rigidity capable of suppressing deflection that occurs as the span between the pillars 111 increases, without protruding to the indoor side.

In addition, the frame 101 of this embodiment has the following effects.

Since the stiffening column 151 is connected to the center of the column 111 in the width direction, the force can be received equally on both sides in the width direction, and the column 111 can be prevented from being twisted.

Since the stiffening column 151 extends from the column 111 and has a T-shaped cross section that turns in two directions at right angles, the geometrical moment of inertia of the entire column 111 formed by the steel pipe 112 and the stiffening column 151 is increases, the rigidity of the column 111 can be increased. At this time, in order to increase the rigidity of the column 111, it is preferable to lengthen the base portion 152 within a range that does not cause local buckling so as to increase the geometrical moment of inertia.

A set of stiffening columns 151 are provided and each extend from one surface 113a and the opposite surface 113b of the steel pipe 112, so that the rigidity of the columns 111 can be further increased. The deflection of the column 111 caused by the load of the beam 131a with a long span is caused by the stiffening column 151 provided on the surface 113a on the side to which the beam 131a is connected, as well as the stiffening column 151 provided on the surface 113b on the opposite side. can also be suppressed.

Since the column 111 has a diaphragm 114 that joins the steel pipe 112 to the upper and lower surfaces at the joint with the beam 131, the strength and rigidity of the joint between the column 111 and the beam 131 can be increased. At this time, since one stiffening column 151 of the column 111A in the first row has a split structure joined to the upper and lower surfaces of the diaphragm 114, the strength of the one stiffening column 151 can be increased. Also, since the second-row column 111B has a divided structure in which a pair of stiffening columns 151 are joined to the upper and lower surfaces of the diaphragm 114, the strength of both stiffening columns 151 can be increased.

Although an example of the column 111 including the stiffening column 151 is shown in the above embodiment, other embodiments may be adopted.

FIG. 7 shows another embodiment of post 111 with stiffening posts 151 . This example is an example of using an assembled rectangular steel pipe as the steel pipe 112 of the column 111 . This assembled rectangular steel pipe is formed by joining four flat plate members 115 by welding or the like.

FIG. 8 shows another embodiment of post 111 with stiffening posts 151 . This example is an example using a circular steel pipe 116 as the steel pipe 112 of the column 111 .

FIG. 9 shows yet another embodiment of the post 111 with stiffening posts 151 . In each of the above-described embodiments, an example using the stiffening column 151 having a T-shaped cross section was introduced. It has an L-shaped cross section that turns perpendicularly in one direction from the end of the base portion 152 extending from the base portion 152 . In this embodiment, a pair of members 153 having such an L-shaped cross section are prepared, and the bases 152 are fixed to the pillar 111 so that the portions 153 that change direction at right angles face opposite directions. there is

FIG. 10 shows yet another embodiment of post 111 having stiffening posts 151 . In this example, the stiffening column 151 is composed of three plate-like members that are relatively thin overall. One of the plate members is a single base plate 154 joined to the column 111 and extending from the column 111 along the virtual plane vs (see FIG. 3). The remaining two plate-like members are a pair of bending plates 155 which have a T-shaped cross section and are fixed by sandwiching the end of the base plate 154 to give the stiffening column 151 a T-shaped cross section. be. The fixing of the pair of bending plates 155 sandwiching the base plate 154 is based on the fastening structure of the bolt B and the nut N.

FIG. 11 shows yet another embodiment of a post 111 having stiffening posts 151 . This example has in common with the column 111 shown in FIG. The difference from the column 111 shown in FIG. 3 is that the steel pipe 112 has a stiffening column 151 fixed to a third surface 113c perpendicular to the two surfaces 113a and 113b to which the stiffening column 151 is fixed. The point is that The stiffening column 151 fixed to the third surface 113c is the same member as the two stiffening columns 151 fixed to the two surfaces 113a and 113b, respectively, and together with these two stiffening columns 151, the column Form another part of 111.

In the columns 111 of the various embodiments described above, the steel pipe 112 may be made of not only steel but also stainless steel, for example.

Although two examples (see FIGS. 4 and 5) of the peripheral structure of the diaphragm 114 are shown in the above embodiment, other embodiments may be employed.

As shown in FIG. 12, the column 111, for example, column 111A in the first row, is formed by dividing the steel pipe 112 by the length of the arrangement interval of the upper and lower beams 131, and joining the divided steel pipe 112 to the upper and lower surfaces of the diaphragm 114. .

On the other hand, none of the pair of stiffening columns 151 provided on the column 111A is divided, and the beams 131a having the longer span are connected to the surface 113a of the column 111A and the opposite surface 113b. directly connected. A pair of these stiffening columns 151 are positioned at the widthwise center of the columns 111A in the first row.

A set of stiffening columns 151 are reinforced by stiffeners 156 . In the case of this embodiment, the base 152 of the stiffening column 151 looks like a web of H-section steel, and there is a possibility that the load of the beam 131 causes deflection. Prevent bending. The stiffener 156 facilitates stress transmission from the beam 131a. The stiffener 156 is fixed by welding to the diaphragm 114, the base portion 152, and the portion extending from the base portion 152 in a T-shape. Four stiffeners 156 are provided for one diaphragm 114 and one stiffening column 151 .

FIG. 13 shows yet another embodiment of post 111 having stiffening posts 151 . In this example, the stiffening column 151 is provided only on the surface 113b opposite to the surface 113a of the column 111A connecting the beam 131a having the longer span. Even by providing a single stiffening column 151 on this surface 113b, it is possible to give the column 111 rigidity capable of suppressing deflection that occurs as the span between the columns 111 increases.

In each of the above embodiments, the stiffening column 151 is provided only in the direction in which the beam 131a having the longer span is bridged. The implementation is not limited to this, and the stiffening column 151 may be provided in the direction in which the beam 131b with the shorter span is bridged.

Various modifications and changes are possible in implementation.

For example, although the diaphragm 114 is provided in this embodiment, the diaphragm 114 is not necessarily essential. Without the diaphragm 114 , both the beam 131 and the stiffening column 151 are directly joined to the steel pipe 112 of the column 111 .

Various other embodiments of the column 111 are shown in FIGS. 7, 8, 9, and 10 in addition to the column 111 shown in FIG. The pillars 111 of these various embodiments are not limited to the first row pillar 111A, and can be used as appropriate for any of the pillars 111 such as the second row pillar 111B and the third row pillar 111C.

This point also applies to the peripheral structure of diaphragm 114 . That is, for the peripheral structure of the diaphragm 114, one example (see FIG. 4) used for the first column pillar 111A and another example (see FIG. 5) used for the second column 111B are shown. Other embodiments are shown in FIGS. 12 and 13, respectively. Each of these four structures can be used as appropriate for any of the columns 111, such as the first row of columns 111A, the second column of columns 111B, and the third column of columns 111C.

The above embodiments and modifications merely show specific examples of the frame. In practice, each part can be changed as appropriate depending on various factors such as the size and shape of the building.

In addition, all variations and modifications are permitted in implementation.

101 frame 111 column 111A column 111B column 111C column 111D large column 112 steel pipe 113a surface 113b opposite surface 113c third surface 114 diaphragm 131 beam 131a beam (longer span)
131b beam (shorter span)
151 Stiffening post 152 Base 153 Right-angled portion 154 Base plate 155 Bending plate 156 Stiffener B Bolt N Nut O Opening vs virtual surface

Claims (12)

a steel pipe forming part of the pillar;
a beam bridged between the steel pipes;
Extending from the steel pipe along the longitudinal direction of the steel pipe, the a stiffening column arranged in the column and forming another part of the column;
with
The stiffening column has a surface forming the steel pipe over which the longer beam of the two beams extending in directions orthogonal to each other extends from the column, and a surface forming the steel pipe on the opposite side. is placed on a virtual plane passing through the
building structure. a steel pipe forming part of the pillar;
a beam bridged between the steel pipes;
Extending from the steel pipe along the longitudinal direction of the steel pipe, the a stiffening column arranged in the column and forming another part of the column;
with
The stiffening column has a surface forming the steel pipe over which the longer beam of the two beams extending in directions orthogonal to each other extends from the column, and a surface forming the steel pipe on the opposite side. is placed on a virtual plane passing through
a set of said stiffening columns, each extending from a surface forming said steel pipe and an opposite surface forming said steel pipe;
building structure. a steel pipe forming part of the pillar;
a beam bridged between the steel pipes;
Extending from the steel pipe along the longitudinal direction of the steel pipe, the a stiffening column arranged in the column and forming another part of the column;
with
The stiffening column has a surface forming the steel pipe over which the longer beam of the two beams extending in directions orthogonal to each other extends from the column, and a surface forming the steel pipe on the opposite side. is placed on a virtual plane passing through
The stiffening column is joined only to one side of the steel pipe,
building structure. The stiffening column is connected to the center in the width direction of the steel pipe,
The building frame according to any one of claims 1 to 3 . The stiffening column extends from the steel pipe and has a T-shaped cross section that changes direction in two directions at right angles,
The building frame according to any one of claims 1 to 4 . The stiffening column is
a base plate extending from the steel pipe;
a pair of bending plates that have a T-shaped cross section and are fixed by sandwiching the ends of the base plate to give the stiffening column a T-shaped cross section;
The building frame of claim 5 , comprising: The stiffening column is a pair of members having an L-shaped cross section that extends from the steel pipe and turns in one direction at right angles, and the portions that turn at right angles extend from the steel pipe in directions opposite to each other. fixed to said steel pipe with the parts back to back to each other;
The building frame according to any one of claims 1 to 4 . The column is provided with a diaphragm that joins the steel pipe to the upper and lower surfaces at the joint with the beam,
The building frame according to any one of claims 1 to 7 . The column is provided with a diaphragm that joins the steel pipe to the upper and lower surfaces at the joint with the beam,
The set of stiffening columns has a split structure joined to the upper and lower surfaces of the diaphragm,
The frame of the building according to claim 2 . The column is provided with a diaphragm that joins the steel pipe to the upper and lower surfaces at the joint with the beam,
One of the stiffening columns has a split structure joined to the upper and lower surfaces of the diaphragm,
The frame of the building according to claim 2 . The column is provided with a diaphragm that joins the steel pipe to the upper and lower surfaces at the joint with the beam,
The stiffening column has a T-shaped cross section with a base portion extending from the steel pipe and changing directions in two directions at right angles from the base portion,
a stiffener fixed to the diaphragm, the base, and a portion extending from the base in a T-shape;
The frame of the building according to claim 2. The column is provided with a diaphragm that joins the steel pipe to the upper and lower surfaces at the joint with the beam,
The stiffening column has a T-shaped cross section with a base portion extending from the steel pipe and changing directions in two directions at right angles from the base portion,
a stiffener fixed to the diaphragm, the base, and a portion extending from the base in a T-shape;
The frame of the building according to claim 3.

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