JP6941447B2 - Building structure - Google Patents

Description

The present invention relates to a building structure in which truss beams are arranged side by side.

For example, as shown in Patent Document 1 below, truss beams formed by connecting an upper chord member and a lower chord member with a plurality of connecting members are juxtaposed, and between the lower chord members of the juxtaposed truss beams. A building structure in which a floor slab is supported is known (see paragraph [0010] of Patent Document 1 below). In such a building structure, a space having a floor such as a living room can be formed in the internal space of the truss beam, and the floor area of the building can be efficiently secured by utilizing the internal space of the truss beam.

By the way, in such a building structure, a load receiving beam that receives a vertical load such as a floor material or a load between the lower chord members of the truss beams arranged side by side has a predetermined load along the extending direction of the truss beam. It is provided at intervals below the receiving pitch. Conventionally, each load receiving beam has been installed in a state where both ends thereof are connected to each of the connecting member connecting points of the lower chord member of the truss beam to which the connecting member is connected.

Japanese Unexamined Patent Publication No. 2016-108816

In the conventional building structure described above, a vertical load between the lower chord members of the truss beam is applied to the connecting members of the lower chord members through each load receiving beam, and the lower chord members of the truss beams arranged side by side are applied to each other. Vertical loads such as floor slab load and load can be appropriately supported between them.

However, depending on the usage pattern of the space having a floor formed in the internal space of the truss beam, a specific connecting material located in the space may become an obstacle and the specific connecting material may have to be deleted. .. In such a case, it is conceivable to connect both ends of the load receiving beam of the relevant portion to each of the non-connecting material connecting points in the lower chord material of the truss beam to which the connecting material is not connected. , A vertical load acts on the non-connecting member connecting portion of the truss beam lower chord member, which may cause inconvenience such as deformation of the lower chord member in a state where the non-connecting member connecting portion hangs down.

In view of this situation, the main subject of the present invention is the lower chord material of the truss beams arranged side by side even when the load receiving beam is installed between the non-connecting parts of the lower chord material in the truss beams arranged side by side. The point is to provide a building structure that can properly support vertical loads between them.

The first characteristic configuration of the present invention is a building structure in which truss beams formed by connecting an upper chord member and a lower chord member with a plurality of connecting members are arranged side by side.
Load-bearing beams extending along the parallel direction of the truss beams and receiving a vertical load between the lower chord members of the truss beams arranged side by side are provided at a plurality of locations in the extending direction of the truss beams.
The portion of the lower chord member to which the connecting member is connected is designated as the connecting member connecting portion, and the portion of the lower chord member to which the connecting member is not connected is designated as the non-connecting member connecting portion.
The load receiving beam located between the non-connecting member connecting points of the juxtaposed truss beams is used as the first load receiving beam, and is connected to the connecting lumber connecting points of the juxtaposed truss beams. The load receiving beam is used as the second load receiving beam.
A load acting member is provided which allows a vertical load applied to the first load receiving beam to act on the connecting member connecting portion of the lower chord member of the truss beam without passing through the non-connecting member connecting portion.
The load acting member includes a load acting beam on one side that extends in the extending direction of the truss beam and is arranged in the vicinity of the lower chord member in a state of being separated from the lower chord member of the truss beam on one side. A load acting beam on the other side, which extends in the extending direction of the truss beam and is arranged in the vicinity of the lower chord member in a state of being separated from the lower chord member of the truss beam on the other side, is provided.
Each of the ends of the load-bearing beam on one side is connected to each of the pair of the second load-bearing beams arranged on both sides of the first load-bearing beam in the extending direction of the truss beam. ,
Each of the ends of the load-bearing beam on the other side is connected to each of the pair of the second load-bearing beams arranged on both sides of the first load-bearing beam in the extending direction of the truss beam. ,
Each of the ends of the first load receiving beam is connected to each of the intermediate portions in the extending direction of the load acting beam on one side and the other side.

According to this configuration, the load acting member allows the vertical load applied to the load receiving beam located between the non-connecting member connecting points of the truss beam to pass through the non-connecting member connecting points of the lower chord member. It can act on the connecting material connection point of the lower chord material.
Therefore, it is possible to avoid inconveniences such as a vertical load acting on the non-connecting material connecting portion of the lower chord material of the truss beam and the lower chord material being deformed in a state where the non-connecting material connecting portion hangs down. , The vertical load between the lower chords of the truss beams arranged side by side can be properly supported.
In addition, the load receiving beam located between the connecting parts of the lower chord material is placed between the connecting parts of the lower chord material without passing the vertical load applied to the connecting part of the lower chord material of the truss beam. It is possible to reliably act on the connecting member connecting portion of the lower chord member via the route, and it is possible to more appropriately support the vertical load between the lower chord members of the truss beams arranged side by side.

The second characteristic configuration of the present invention is arranged as the plurality of connecting members in an arrangement forming a plurality of triangular spaces arranged in the extending direction of the truss beam between the upper chord member and the lower chord member of the truss beam. A plurality of diagonal lumbers and a plurality of bundle lumbers arranged in a state of traversing a plurality of triangular spaces are provided.
The point is that the non-connecting material connecting portion is configured by omitting a part of the bundled materials among the plurality of the bundled materials.

According to this configuration, while appropriately supporting the vertical load between the lower chord members of the truss beams arranged side by side, the bundle material that traverses the triangular space formed in the truss beams is deleted, and the triangular shape is removed. Space can be opened, and a space having a floor such as a passage for transporting goods can be constructed by using the triangular open space.

(A) Axle diagram of building structure, (b) Beam plan of building structure Beam plan of the main part of the building structure Beam plan of the main part of the building structure

An embodiment of the building structure according to the present invention will be described with reference to the drawings.
FIG. 1A is a diagram schematically showing a state of a framework of a building structure according to the present invention. FIG. 1B is a beam plan that schematically shows the state of the beam assembly at the installation height of the lower chord member 2b of the truss beam 2 in the same building structure, and for convenience, the construction portion of the floor slab S is grayed out. it's shown.

As shown in FIG. 1A, this building structure can form a steel-framed truss beam structure K in which truss beams 2 are erected on a plurality of column structures 1 and a space having a floor inside the truss beams 2. It is configured to be provided with a reinforced concrete floor slab S constructed on the truss beam 2 in such a state, and a living room, a passage, or the like can be formed by using the internal space of the truss beam 2.

In this building structure, the pillar structure 1 includes a first pillar structure 1A which is a seismic element and a second pillar structure 1B which has a smaller resistance to seismic force.
The first pillar structure 1A is provided at the central portion in the building width direction X, and the second pillar structure 1B is provided at both ends in the building width direction X. Therefore, the truss beam frame K is configured to have a symmetrical frame with a well-balanced shape centered on the center position in the building width direction X.
The first column structure 1A is supported by the first foundation 5 with a column base structure having a fixed end at the lower end, and the second column structure 1B is supported by the second foundation 6 with a column base structure having a pin end at the lower end. Has been done.

The first column structure 1A, which is a seismic element, is formed as a wide core portion having high surface rigidity, and mainly constitutes a seismic element that resists seismic force. In this first column structure 1A, for example, a plurality of columns made of steel or the like in a vertical posture arranged at intervals in the building width direction X are rigidly and integrally connected by beams such as steel and braces made of steel or the like. It is composed of.
Further, a pair of left and right steel canes 7 for connecting the upper ends of both side portions of the first pillar structure 1A in the building width direction X and the lower chord member 2b of the truss beam 2 in an oblique posture are provided. With these canes 7, the support span of the truss beam 2 can be shortened, and the members of the truss beam 2 can be reduced.

The second pillar structure 1B, which has a smaller resistance to seismic force than the first pillar structure 1A, is configured such that the upper side projects like a cane toward the center side in the building width direction X. The second pillar structure 1B includes, for example, a pillar material made of steel in a vertical posture, a pillar material made of steel in an oblique posture located on the central side of the building width direction X toward the upper side, and these pillar materials. It is composed of connecting materials made of steel such as diagonal members and horizontal members to be connected. By projecting the upper side of the second column structure 1B toward the center side in the building width direction X in this way, the support span of the truss beam 2 can be further shortened, and the members of the truss beam 2 can be further reduced. can. In addition, by narrowing the width of the lower side of the second pillar structure 1B, the internal space of the building is appropriately secured, and the center of gravity is concentrated at one point to simplify and downsize the shape of the second foundation 6. be able to.

As shown in FIGS. 1A and 1B, the floor slab S is located in the entire range of the building depth direction Y and on the center side of the building width direction X (extending direction X of the truss beam 2). It is constructed in a part of the floor slab construction range A where it is located. By narrowing the construction range of the floor slab S in this way, it is possible to suppress an increase in weight on the truss beam 2 side, which is disadvantageous in earthquake resistance, as much as possible.
The construction position of the floor slab S is set so that the center of the floor slab S in the building width direction X is directly above the center of the building width direction X of the first pillar structure 1A. Therefore, the building structure including the truss beam frame K and the floor slab S is also configured to have a symmetrical structure centered on the center position in the building width direction X and have a well-balanced structure.

As shown in FIG. 1A, the truss beam 2 is provided over the upper part of a plurality of column structures 1 provided at a plurality of locations in the building width direction X (extending direction X of the truss beam 2). , It is supported from below by a plurality of column structures 1.
Each truss beam 2 is composed of an upper chord member 2a made of steel or the like, a lower chord member 2b made of steel or the like, a connecting member 2c made of steel or the like that connects the upper chord member 2a and the lower chord member 2b, and the like.
The plurality of connecting members 2c are arranged between the upper chord member 2a and the lower chord member 2b of the truss beam 2 in an arrangement forming a plurality of triangular spaces arranged along the extending direction X of the truss beam 2. A plurality of diagonal members 2d and a plurality of bundled members 2e arranged so as to traverse a plurality of triangular spaces are provided.

As shown in FIG. 1B, the truss beam frame K is configured by arranging a plurality of truss beams 2 erected on a plurality of column structures 1 in parallel along the building depth direction Y. A plurality of beams 3 made of steel or the like are provided between the lower chord members 2b of the truss beams 2 adjacent to each other in the building depth direction Y at intervals in the building width direction X, and the plurality of trusses are provided by the beams 3. The beam 2 is connected. Then, at the construction site of the floor slab S, the floor slab S is supported on the beam 3. In addition, a brace 4 or the like made of a steel material or the like is appropriately provided in a portion where the floor slab S is not constructed.

In this building structure, as shown in FIG. 1A, a plurality of truss beams 2 arranged side by side along the building depth direction Y have the same position in the building width direction X (extending direction X of the truss beams 2). It is designed by omitting the specific bundle material 2e (the bundle material 2e indicated by the dotted line in the figure). By doing so, a specific downward spread formed between the upper chord member 2a and the lower chord member 2b of each truss beam 2 at the same position in the building width direction X (extending direction X of the truss beam 2). The triangular open space D can be opened, and the triangular open space D can be made continuous along the building depth direction Y.
Therefore, in this building structure, a triangular open space D continuous along the building depth direction Y is used, and the passage construction range B corresponding to the open space D in the building width direction X is set along the building depth direction Y. An extending passage can be suitably formed.

As shown in FIG. 1B, among the beams 3 between the lower chord members 2b of the truss beams 2 adjacent to each other in the building depth direction Y, a plurality of load receiving beams 3A arranged in the construction range A of the floor slab S. Is installed at intervals equal to or less than a predetermined load receiving interval in the extending direction X of the truss beam 2, and the load of the floor slab S (an example of a vertical load) without causing damage to the components of the floor slab S such as a concrete plate. ) Is properly supported.

Here, when a vertical load is applied to the non-connecting member connecting portion of the truss beam 2 lower chord member 2b to which the connecting member 2c is not connected, the lower chord of the truss beam 2 is in a state where the non-connecting member connecting portion hangs down. There is a risk of causing inconvenience such as deformation of the material 2b.
Therefore, in this building structure, the vertical load applied to each load receiving beam 3A is applied regardless of the difference in the positional condition of each load receiving beam 3A between the lower chord members 2b of the truss beams 2 adjacent to each other in the building depth direction Y. The connecting member 2c in the lower chord member 2b of the truss beam 2 is configured to act on the connected connecting member connecting portion P without acting on the non-connecting member connecting portion. Hereinafter, a specific installation form of the load receiving beam 3A in this building structure will be described.

2 and 3 are beam plan views schematically showing the state of the beam assembly of the main part of the installation height of the lower chord member 2b of the truss beam 2 in the present building structure.
FIG. 2 shows the passage construction range B on the right side in FIG. 1, and one load receiving beam 3A is arranged in the passage construction range B in the building width direction X (extending direction X of the truss beam 2). It exemplifies the case where there is. FIG. 3 shows the passage construction range B on the left side in FIG. 1, and two load receiving beams 3A are arranged in the passage construction range B in the building width direction X (extending direction X of the truss beam 2). It exemplifies the case where there is. However, since the concept of installation of the load receiving beam 3A in both figures is basically the same, they will be described together unless it is necessary to distinguish them.
For the sake of convenience, in FIGS. It has a square shape. Further, a dotted square shape is attached to a portion of the lower chord member 2b where the bundle member 2e is omitted at the non-connecting member connecting portion.

As shown in FIGS. 2 and 3, in this building structure, each load receiving beam 3A is arranged at an interval equal to or less than a predetermined load receiving interval in the building width direction X (extending direction X of the truss beam 2). In the floor slab construction range A (see FIG. 1) excluding the passage construction range B, each load receiving beam 3Aa is arranged between the connecting member connection points P in the lower chord member 2b of the truss beam 2 adjacent to each other in the building depth direction Y. ing. Then, the load receiving beam 3Aa is installed in a state where each end of the load receiving beam 3Aa is connected to each of the connecting member connecting points P in the lower chord member 2b of the adjacent truss beam 2.

On the other hand, in the passage construction range B, in the building width direction X (extending direction X of the truss beam 2), a portion where the bundle member 2e in the lower chord member 2b of the truss beam 2 is omitted (dotted line portion in FIGS. 2 and 3). The distance between the connecting member connection points P located on both sides of the above will exceed the predetermined load receiving interval.
Therefore, in this example, in the lower chord member 2b of the truss beam 2 adjacent in the building depth direction Y, the load receiving beam 3Ab is arranged between the non-connecting member connecting points in the passage construction range B, and the load receiving beam 3Ab is arranged. A load acting member 8 is installed so that the vertical load applied to 3Ab is applied to the connecting member connecting portion P of each lower chord member 2b without passing through the non-connecting member connecting portion.

The load acting member 8 connects both ends of the load receiving beam 3Ab located between the non-connecting member connecting portions of the lower chord member 2b adjacent to each other in the building depth direction Y to the non-connecting member connecting portion of the lower chord member 2b. Instead, it is configured by connecting to the load receiving beam 3Aa connected to the connecting member connecting point P of the lower chord member 2b between the connecting member connecting points P of the lower chord member 2b, and the lower chord member is connected via the load receiving beam 3Aa. It is configured to apply a vertical load to the connecting member connection point P of 2b.

Specifically, the load acting member 8 is composed of a pair (plural examples) of load acting beams 8a and 8b made of steel or the like extending along the building width direction X (extending direction X of the truss beam 2). ing. The pair of load acting beams 8a and 8b are orthogonal to the truss beams 2 in the space between the non-connecting members of the lower chord members 2b adjacent to each other in the building depth direction Y (orthogonal direction Y of the truss beams 2 in the drawing). They are arranged in parallel with a space in the direction Y.

The load acting beams 8a and 8b are arranged closer to the lower chord member 2b than the central position in the building depth direction Y in the space between the non-connecting member connection points of the adjacent lower chord member 2b.
The load acting beam 8a on one side is arranged in the vicinity of the lower chord member 2b of the truss beam 2 on the one side in a state of being separated from the lower chord member 2b of the truss beam 2 on the upper side in the drawing. The load acting beam 8b on the other side is arranged in the vicinity of the lower chord member 2b of the truss beam 2 on the other side in a state of being separated from the lower chord member 2b of the truss beam 2 on the other side in the drawing.

Each of the ends of the load acting beams 8a and 8b is a pair of load receiving beams 3Aa connected to connecting material connecting points P located on both sides of the non-connecting material connecting part in the extending direction X of the truss beam 2. It is connected to each of the. Then, each of the end portions of the load receiving beams 3Ab located between the non-connecting member connecting portions is connected to each of the intermediate portions in the extending direction of the load acting beams 8a and 8b.

Therefore, in this passage construction range B, the vertical load applied to the load receiving beams 3Ab located between the non-connecting member connecting points of the adjacent truss beams 2 is applied to the connecting members of the load acting beams 8a, 8b and the lower chord member 2b. The pair of load receiving beams 3Aa connected to the connecting portion P can be transmitted in this order, and can act on the connecting member connecting portion P of the lower chord member 2b without passing through the non-connecting member connecting portion.

As shown in FIGS. 2 and 3, the number of load receiving beams 3Ab erected between the pair of load acting members 8 is the distance between the connecting material connecting points P on both sides of the non-connecting material connecting part. It can be changed according to the assumed vertical load size, the structure of the floor slab S, and the like. By the way, as shown in FIG. 3, when a plurality of load receiving beams 3Abs are erected between the intermediate portions of the pair of load acting members 8 in the extending direction, the intermediate portions of the adjacent load receiving beams 3Abs are connected to each other. The connecting beams 9 to be connected can be appropriately installed.
Although not shown, the members of the building structure can be connected to each other by fasteners such as bolts and nuts or by appropriate connecting means such as welding.

[Another Embodiment]
(1) In the above-described embodiment, when forming a passage having a floor in the internal space of the truss beam 2, a case where a part of the bundled materials 2e among the plurality of bundled materials 2e is omitted in the truss beam 2 is shown as an example. However, instead of or in addition to this, a part of the diagonal members 2d may be omitted from the plurality of diagonal members 2d in the truss beam 2.

(2) In the above-described embodiment, the case where the load acting member 8 is composed of the load acting beams 8a and 8b extending along the building width direction X (extending direction X of the truss beam 2) is shown as an example. However, the load acting member 8 does not apply the vertical load applied to the load receiving beam 3Ab located between the non-connecting member connecting portions of the lower chord member 2b of the truss beam 2 with respect to the connecting member connecting portion P of the lower chord member 2b. Any structure may be used as long as it can be operated without passing through the connecting member connecting portion.

(3) In the above-described embodiment, a truss beam 2 having only two upper and lower chords of the upper chord member 2a and the lower chord member 2b is shown as an example, but the truss beam 2 is spaced apart in the vertical direction. It may be provided with three or more chords arranged side by side. In this case, of the three or more chords, in the specific two chords connected by the connecting material, the chord material located on the relatively upper side corresponds to the upper chord material, and is relatively on the lower side. The located chord material corresponds to the upper chord material.

2 Truss beam 2a Upper chord material 2b Lower chord material 2c Connecting material 2d Diagonal material 2e Bundle material 3A Load receiving beam 8 Load acting member P Connecting material Connection point S Floor slab X Extension direction of truss beam

Claims (2)

It is a building structure in which truss beams composed by connecting the upper chord material and the lower chord material with a plurality of connecting materials are arranged side by side.
Load-bearing beams extending along the parallel direction of the truss beams and receiving a vertical load between the lower chord members of the truss beams arranged side by side are provided at a plurality of locations in the extending direction of the truss beams.
The portion of the lower chord member to which the connecting member is connected is designated as the connecting member connecting portion, and the portion of the lower chord member to which the connecting member is not connected is designated as the non-connecting member connecting portion.
The load receiving beam located between the non-connecting member connecting points of the juxtaposed truss beams is used as the first load receiving beam, and is connected to the connecting lumber connecting points of the juxtaposed truss beams. The load receiving beam is used as the second load receiving beam.
A load acting member is provided which allows a vertical load applied to the first load receiving beam to act on the connecting member connecting portion of the lower chord member of the truss beam without passing through the non-connecting member connecting portion.
The load acting member includes a load acting beam on one side that extends in the extending direction of the truss beam and is arranged in the vicinity of the lower chord member in a state of being separated from the lower chord member of the truss beam on one side. A load acting beam on the other side, which extends in the extending direction of the truss beam and is arranged in the vicinity of the lower chord member in a state of being separated from the lower chord member of the truss beam on the other side, is provided.
Each of the ends of the load-bearing beam on one side is connected to each of the pair of the second load-bearing beams arranged on both sides of the first load-bearing beam in the extending direction of the truss beam. ,
Each of the ends of the load-bearing beam on the other side is connected to each of the pair of the second load-bearing beams arranged on both sides of the first load-bearing beam in the extending direction of the truss beam. ,
A building structure in which each of the ends of the first load receiving beam is connected to each of the intermediate portion in the extending direction of the load acting beam on one side and the other side. As the plurality of connecting members, a plurality of diagonal members arranged in an array forming a plurality of triangular spaces arranged along the extending direction of the truss beam between the upper chord member and the lower chord member of the truss beam. It is equipped with a plurality of bundles arranged in a state of traversing a plurality of triangular spaces.
The building structure according to claim 1, wherein the non-connecting material connecting portion is configured by omitting a part of the bundled materials among the plurality of the bundled materials.

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