JP7784889B2 - frame structure - Google Patents

Description

The present invention relates to a structural frame.

A truss beam is known that includes a pair of upper and lower chord members that face each other in the vertical direction, and a diagonal member that connects the pair of upper and lower chord members (see, for example, Patent Documents 1 and 2).

JP 2008-261102 A Japanese Patent Application Laid-Open No. 2017-198028

In a truss beam, rigidity is increased by connecting a pair of upper and lower chords with diagonal members.

However, with truss beams, because diagonal members exist between a pair of upper and lower chords, it is difficult to ensure a wide opening between the pair of upper and lower chords.

The present invention takes the above into consideration and aims to provide a structural frame that can ensure a wide opening.

The frame structure of the first aspect comprises a first beam having a pair of first upper beam members and first lower beam members facing each other in the vertical direction, a second beam having a pair of second upper beam members and second lower beam members facing each other in the vertical direction and having lower rigidity than the first beam, a support column connecting the first upper beam member and the first lower beam member, an upper support beam rigidly connected to the upper end of the support column via the first upper beam member and connecting the first upper beam member and the second upper beam member, and a lower support beam rigidly connected to the lower end of the support column via the first lower beam member and connecting the first lower beam member and the second lower beam member.

According to the frame structure of the first aspect , the first beam has a pair of first upper beam members and first lower beam members facing each other in the vertical direction. The second beam has a pair of second upper beam members and second lower beam members facing each other in the vertical direction and has lower rigidity than the first beam.

The reinforcing frame has a support column, an upper support beam, and a lower support beam. The support column connects the first upper beam member and the first lower beam member. The upper support beam is rigidly connected to the upper end of the support column via the first upper beam member, connecting the first upper beam member and the second upper beam member. This allows the second upper beam member to be supported by the first beam via the upper support beam. Therefore, deflection of the second upper beam member is reduced.

In addition, the lower support beam is rigidly connected to the lower end of the column via the first lower beam member, connecting the first lower beam member and the second lower beam member. This allows the second lower beam member to be supported by the first beam via the lower support beam. Therefore, deflection of the second lower beam member is reduced.

As a result, the present invention makes it possible to reduce the number of diagonal members connecting the second upper beam member and the second lower beam member, or to eliminate the diagonal members. This allows for a wide opening to be formed between the second upper beam member and the second lower beam member.

Furthermore, as mentioned above, the deflection of the second upper beam member and the second lower beam member is reduced, so the beam height of the second upper beam member and the second lower beam member can be lowered. Therefore, the opening between the second upper beam member and the second lower beam member can be further widened.

Furthermore, by lowering the beam height of the second upper beam and second lower beam, the lines of the second upper beam and second lower beam become thinner when viewed from the side. This improves the design of the second beam.

The frame structure of the second aspect is the frame structure of the first aspect , and further comprises an upper torsional resistance member having at least one of a horizontal brace and a slab, connecting the first upper beam member and the second upper beam member, and a lower torsional resistance member having at least one of a horizontal brace and a slab, connecting the first lower beam member and the second lower beam member.

In the frame structure according to the second aspect , the upper torsion-resisting member has at least one of a horizontal brace and a slab and connects the first upper beam member and the second upper beam member. The lower torsion-resisting member has at least one of a horizontal brace and a slab and connects the first lower beam member and the second lower beam member. These upper and lower torsion-resisting members reduce torsion of the first beam.

Therefore, the present invention makes it possible to form a wide opening between the second upper beam member and the second lower beam member while reducing twisting of the first beam member.

The frame structure of the third aspect is the frame structure of the first or second aspect, and is provided with a connecting member that connects the second upper beam member and the second lower beam member at a position opposite the support pillar.

In the frame structure according to the third aspect , the connecting member connects the second upper beam member and the second lower beam member at a position opposite the support column. This allows the upper support beam and the lower support beam to cooperate to resist deflection of the second upper beam member and the second lower beam member, further reducing deflection of the second upper beam member and the second lower beam member. Therefore, the beam mass of the second upper beam member and the second lower beam member can be further reduced.

In addition, since the burden on the upper and lower support beams is reduced, the beam mass of the upper and lower support beams can also be reduced.

As explained above, the present invention makes it possible to obtain a structural frame that can ensure a wide opening.

1 is a perspective view showing a connecting passage to which a frame structure according to one embodiment is applied; FIG. 2 is an elevation view of the first frame shown in FIG. 1 . FIG. 2 is an elevation view of the second frame shown in FIG. 1 . 2 is a plan view of the first upper beam member and the second upper beam member shown in FIG. 1. 2 is a planar cross section of the first lower beam material and the second lower beam material shown in FIG. 1 . FIG. 2 is a cross-sectional view of the communication passage shown in FIG. 1 .

The following describes the frame structure of one embodiment, with reference to the drawings.

(frame structure)
1 shows a connecting passage 10 to which the structural structure according to this embodiment is applied. The connecting passage (bridge) 10 connects, for example, two structures (not shown). The connecting passage 10 includes a first frame 20 and a second frame 40 facing each other, and a plurality of reinforcing frames 90 connecting the first frame 20 and the second frame 40.

Note that the arrow X shown in each figure indicates the longitudinal direction of the communication passage 10 (the material axis direction of the first beam 30 and the second beam 50). Furthermore, the arrow Y indicates the width direction of the communication passage 10 (the opposing direction of the first beam 30 and the second beam 50). Furthermore, the arrow Z indicates the height direction (up and down direction) of the communication passage 10.

(first frame)
As shown in Fig. 2, the first frame 20 is a rigid frame having a pair of first columns 22 and a first beam 30. The pair of first columns 22 are formed of steel frame members (steel columns) such as steel pipes. The pair of first columns 22 are also arranged with a gap between them in the longitudinal direction of the connecting passage 10. A first beam 30 made of steel is erected on the pair of first columns 22.

The first beam 30 is a truss beam having a pair of first upper beam members 32 and first lower beam members 34, and multiple diagonal members 36. The pair of first upper beam members 32 and first lower beam members 34 are formed from steel frame members (steel beams) such as H-shaped steel, and are arranged facing each other in the vertical direction. Each first upper beam member 32 and first lower beam member 34 functions as the upper chord and lower chord of the truss beam.

The first upper beam member 32 and the first lower beam member 34 are supported by a pair of first columns 22, with both ends rigidly joined to the pair of first columns 22. The pair of first upper beam members 32 and first lower beam members 34 are connected by a plurality of diagonal members 36 and struts 92, which will be described later. The diagonal members 36 are an example of connecting members (first connecting members).

The diagonal members 36 are formed from steel frame members such as H-shaped steel beams. These diagonal members 36 are arranged diagonally between adjacent columns 92, with their upper ends pin-joined to the first upper beam member 32 and their lower ends pin-joined to the first lower beam member 34. In this embodiment, a pair of diagonal members 36 are arranged in an X-shape between adjacent columns 92.

The type of first beam 30 is not limited to a specific one, and may be a Howe truss, Warren truss, Vierendeel truss, etc.

(Second frame)
As shown in Fig. 3, the second frame 40 is a rigid frame having a pair of second columns 42 and a second beam 50. The pair of second columns 42 are formed of steel members (steel columns) such as steel pipes. The pair of second columns 42 are also arranged at a distance from each other in the longitudinal direction (direction of arrow X) of the connecting passage 10. A first beam 30 made of steel is erected on the pair of first columns 22.

The second beam 50 has a pair of second upper beam members 52 and second lower beam members 54. The pair of second upper beam members 52 and second lower beam members 54 are formed from steel frame members (steel beams) such as H-shaped steel, and are arranged facing each other in the vertical direction. Furthermore, each second upper beam member 52 and second lower beam member 54 is supported on a pair of second columns 42, and both ends of each second upper beam member 52 and second lower beam member 54 are rigidly connected to the pair of second columns 42.

In addition, since the second beam 50 does not have a diagonal member connecting the second upper beam member 52 and the second lower beam member 54, its rigidity (vertical rigidity) is lower than that of the first beam 30.

As shown in FIG. 1, a pair of first pillars 22 and a pair of second pillars 42 face each other in the width direction (arrow Y direction) of the connecting passage 10. The opposing first pillars 22 and second pillars 42 are connected by an upper cross beam 60 and a lower cross beam 62.

The upper cross beam 60 and the lower cross beam 62 are formed from steel members (steel beams) such as H-shaped steel, and are arranged facing each other in the vertical direction. The upper cross beam 60 and the lower cross beam 62 are installed across the opposing first column 22 and second column 42, with both ends rigidly connected to the first column 22 and second column 42, respectively.

The first upper beam member 32 and the second upper beam member 52 face each other in the width direction of the connecting passageway 10. Both ends of the second upper beam member 52 are rigidly connected to both ends of the first upper beam member 32 via upper cross beams 60. As shown in FIG. 4, the first upper beam member 32, the second upper beam member 52, and the upper cross beams 60 form an upper planar frame 70 that is rectangular in plan view. This upper planar frame 70 is provided with a plurality of horizontal braces 72, which will be described later.

As shown in FIG. 1, the first lower beam member 34 and the second lower beam member 54 face each other in the width direction of the connecting passageway 10. Both ends of this second lower beam member 54 are rigidly connected to both ends of the first lower beam member 34 via lower cross beams 62. As shown in FIG. 5, the first lower beam member 34, the second lower beam member 54, and the lower cross beams 62 form a rectangular lower planar frame 80 in plan view. A slab 82, which will be described later, is provided on this lower planar frame 80.

(reinforcement frame)
1 , the multiple reinforcing frames 90 function as support frames that transmit the load (vertical load) of the second beam 50 to the first beam 30 and support the second beam 50 on the first beam 30. These reinforcing frames 90 are arranged at intervals in the material axis direction of the first beam 30 and the second beam 50. Note that at least one reinforcing frame 90 is sufficient.

As shown in Figure 6, the reinforcing frame 90 has a C-shape (U-shape) with an opening on the second beam 50 side when viewed in the material axis direction of the first beam 30 and the second beam 50. This reinforcing frame 90 has a support column 92, an upper support beam 94, and a lower support beam 96.

The support pillar 92 is formed from a steel member (steel column) such as an H-shaped steel beam. The support pillar 92 is arranged in the vertical direction between the first upper beam member 32 and the first lower beam member 34, connecting the first upper beam member 32 and the first lower beam member 34. The upper end of the support pillar 92 is rigidly joined to the first upper beam member 32, and the lower end of the support pillar 92 is rigidly joined to the first lower beam member 34.

The upper support beam 94 is formed from a steel member (steel column) such as an H-shaped steel beam. The upper support beam 94 is positioned between the first upper beam member 32 and the second upper beam member 52 along the width direction of the connecting passageway 10, connecting the first upper beam member 32 and the second upper beam member 52.

One end of the upper support beam 94 is rigidly connected to the joint (joint) between the first upper beam member 32 and the support post 92. In other words, one end of the upper support beam 94 is rigidly connected to the upper end of the support post 92 via the first upper beam member 32. The other end of the upper support beam 94 is connected (rigidly or by pin connection) to the second upper beam member 52. The second upper beam member 52 is supported by the first upper beam member 32 via this upper support beam 94.

The lower support beam 96 is formed from a steel frame member (steel column) such as an H-shaped steel beam. The lower support beam 96 is arranged between the first lower beam member 34 and the second lower beam member 54 along the width direction of the connecting passageway 10, connecting the first lower beam member 34 and the second lower beam member 54.

One end of the lower support beam 96 is rigidly connected to the joint (joint) between the first lower beam member 34 and the support post 92. In other words, one end of the lower support beam 96 is rigidly connected to the lower end of the support post 92 via the first lower beam member 34. The other end of the lower support beam 96 is connected (rigidly or pin-jointed) to the second lower beam member 54. The second lower beam member 54 is supported by the first lower beam member 34 via this lower support beam 96.

(Connecting material)
The second upper beam member 52 and the second lower beam member 54 are connected by a connecting member 100. The connecting member 100 is formed of steel, such as a flat bar or an H-shaped steel. The connecting member 100 is disposed between the second upper beam member 52 and the second lower beam member 54 in the vertical direction, and connects the second upper beam member 52 and the second lower beam member 54.

The connecting members 100 face the support posts 92 in the width direction of the connecting passage 10, and their upper ends are joined (pin-jointed) to the first upper beam member 32 and their lower ends are joined (pin-jointed) to the first lower beam member 34. As shown in Figure 3, rectangular openings 56 are formed between adjacent connecting members 100, spanning the second upper beam member 52 and the second lower beam member 54.

(horizontal brace)
As shown in Fig. 4, the upper planar frame 70 is provided with a plurality of horizontal braces 72. The horizontal braces 72 are disposed diagonally between adjacent upper support beams 94 and connect the first upper beam member 32 and the second upper beam member 52. These horizontal braces 72 increase the rigidity (in-plane rigidity and out-of-plane rigidity) of the upper planar frame 70. In addition, a roof material (not shown) is provided on the upper planar frame 70.

Note that the horizontal brace 72 is an example of an upper torsion resistance member.

(Slab)
5, a reinforced concrete slab 82 is provided on the lower planar frame 80. The slab 82 is made of reinforced concrete and forms the floor of the connecting passage 10. The slab 82 increases the rigidity (in-plane rigidity and out-of-plane rigidity) of the lower planar frame 80.

Note that the slab 82 is not shown in Figures 1 to 4. The slab 82 is an example of a lower torsion resistance member.

For example, a wall (exterior wall) 38 is provided on the first beam 30. Meanwhile, a glass window (not shown) or the like is provided in the opening 56 of the second beam 50.

(effect)
Next, the operation of this embodiment will be described.

As shown in FIG. 1, the first beam 30 has a pair of first upper beam members 32 and first lower beam members 34 that face each other in the vertical direction. The second beam 50 also has a pair of second upper beam members 52 and second lower beam members 54 that face each other in the vertical direction, and has lower rigidity than the first beam 30. The first beam 30 and second beam 50 are connected via multiple reinforcing frames 90.

As shown in FIG. 6, the reinforcing frame 90 has a support pillar 92, an upper support beam 94, and a lower support beam 96. The support pillar 92 connects the first upper beam member 32 and the first lower beam member 34.

The upper support beam 94 is rigidly connected to the upper end of the support column 92 via the first upper beam member 32, connecting the first upper beam member 32 and the second upper beam member 52. This allows the second upper beam member 52 to be supported by the first beam 30 via the upper support beam 94. This reduces deflection of the second upper beam member 52.

In addition, the lower support beam 96 is rigidly connected to the lower end of the support column 92 via the first lower beam member 34, connecting the first lower beam member 34 and the second lower beam member 54. As a result, the second lower beam member 54 is supported by the first beam 30 via the lower support beam 96. Therefore, deflection of the second lower beam member 54 is reduced.

For this reason, in this embodiment, as shown in Figures 1 and 3, the diagonal members connecting the second upper beam member 52 and the second lower beam member 54 can be reduced or eliminated. Therefore, a wide opening 56 can be formed between the second upper beam member 52 and the second lower beam member 54.

Furthermore, as mentioned above, since the deflection of the second upper beam member 52 and the second lower beam member 54 is reduced, the beam height of the second upper beam member 52 and the second lower beam member 54 can be lowered. Therefore, the opening 56 between the second upper beam member 52 and the second lower beam member 54 can be further widened.

Furthermore, by lowering the beam height of the second upper beam member 52 and the second lower beam member 54, the lines of the second upper beam member 52 and the second lower beam member 54 become thinner when viewed from the side of the second beam 50. This improves the design of the second beam 50.

Also, as shown in FIG. 1, the connecting member 100 connects the second upper beam member 52 and the second lower beam member 54 at a position opposite the support column 92 of the reinforcing frame 90. This allows the upper support beam 94 and the lower support beam 96 to cooperate to resist deflection of the second upper beam member 52 and the second lower beam member 54, further reducing deflection of the second upper beam member 52 and the second lower beam member 54. Therefore, the beam stiffness of the second upper beam member 52 and the second lower beam member 54 can be further reduced.

In addition, since the burden on the upper support beams 94 and lower support beams 96 is reduced, the beam thickness of the upper support beams 94 and lower support beams 96 can also be reduced.

Here, as shown in Figure 6, if the second beam 50 is supported by the first beam 30 via multiple reinforcing frames 90, a torsional moment M may act on the first beam 30, causing it to twist.

To address this issue, in this embodiment, as shown in Figure 4, multiple horizontal braces 72 are provided on the upper planar frame 70. The multiple horizontal braces 72 connect the first upper beam member 32 and the second upper beam member 52. These horizontal braces 72 resist the torsional moment M, thereby reducing torsion of the first beam 30.

As shown in Figure 5, the lower planar frame 80 is provided with a slab 82. The slab 82 connects the first lower beam member 34 and the second lower beam member 54. This slab 82 resists the torsional moment M, further reducing the torsion of the first beam 30.

In this way, in this embodiment, it is possible to form a wide opening 56 between the second upper beam member 52 and the second lower beam member 54 while reducing torsion of the first beam 30 and the second beam 50.

Furthermore, by connecting the opposing first and second columns 22 and 42 with the upper and lower cross beams 60 and 62, torsion of the first and second beams 30 and 50 can be further reduced.

(Modification)
Next, a modification of the above embodiment will be described.

In the above embodiment, the upper torsional resistance member is the horizontal brace 72. However, the upper torsional resistance member can include at least one of a horizontal brace 72 and a slab. Similarly, the lower torsional resistance member can include at least one of a horizontal brace and a slab 82. Furthermore, the upper torsional resistance member and the lower torsional resistance member may be provided as needed, and can be omitted as appropriate.

Furthermore, in the above embodiment, a connecting member 100 is provided on the second beam 50. However, the connecting member 100 may be provided as needed and may be omitted as appropriate.

In addition, in the above embodiment, the first beam 30 is a truss beam. However, the first beam 30 is not limited to a truss beam. The first beam 30 only needs to have higher rigidity (vertical rigidity) than the second beam 50. For example, the diagonal member 36 may be omitted from the first beam 30, and the beam structure of the first upper beam member 32 and the first lower beam member 34 may be increased, or a bearing wall or the like may be provided between the first upper beam member 32 and the first lower beam member 34.

Furthermore, the frame structure according to the above embodiment is not limited to the connecting passage 10 and can be applied to various frames.

The above describes one embodiment of the present invention, but the present invention is not limited to this embodiment. One embodiment and various modified versions may be used in appropriate combination, and the present invention can of course be implemented in various forms without departing from the spirit of the present invention.

30 First beam 32 First upper beam member 34 First lower beam member 50 Second beam 52 Second upper beam member 54 Second lower beam member 72 Horizontal brace (upper torsion resistance member)
82 Slab (lower torsion resistance member)
90 Reinforcement frame 92 Support 94 Upper support beam 96 Lower support beam 100 Connecting member

Claims (3)

a first beam having a pair of first upper beam members and first lower beam members facing each other in the vertical direction;
A second beam having a pair of second upper beam members and second lower beam members facing each other in the vertical direction and having lower rigidity than the first beam;
a reinforcing frame having a support pillar connecting the first upper beam member and the first lower beam member, an upper support beam rigidly connected to the upper end of the support pillar via the first upper beam member and protruding from the first upper beam member to support the second upper beam member in a cantilevered manner , and a lower support beam rigidly connected to the lower end of the support pillar via the first lower beam member and protruding from the first lower beam member to support the second lower beam member in a cantilevered manner ;
A structural frame comprising: An upper torsion-resistant member having at least one of a horizontal brace and a slab, connecting the first upper beam member and the second upper beam member;
a lower torsion-resisting member having at least one of a horizontal brace and a slab, connecting the first lower beam member and the second lower beam member;
The frame structure according to claim 1 . A connecting member is provided that connects the second upper beam member and the second lower beam member at a position opposite to the support pillar.
The frame structure according to claim 1 or 2.