JP7670407B2 - Building structure - Google Patents

Description

The present invention relates to building structures.

In a built-in garage of a building or a store on the first floor of a building, a portal frame may be applied in which beams made of shaped steel materials such as large H-shaped steel beams are supported by ladder-shaped columns (ladder-shaped assembled columns) at both ends of the large opening to form a frame for the garage or store with a large opening. Here, the ladder-shaped column is a highly rigid column that has two columns and multiple cross members (connecting members) that connect the columns.

A general frame (general frame) is connected to the side of the portal frame, and the general frame forms the first floor, while the portal frame and the general frame form the floor beams (or floor beams) of the second floor. At this time, the beams of the portal frame and the beams of the general frame are connected to each other, so that the building frame consisting of the portal frame and the general frame is formed on the same structural surface.

In the above-mentioned building frame, when the floor height of the general frame increases, the height of the ladder-shaped columns that form the portal frame also increases, resulting in a decrease in the rigidity of the ladder-shaped columns, which become relatively slender. If the size of the columns that form the ladder-shaped columns is increased in order to increase the reduced rigidity, then the wall thickness of the portal frame will also increase, which is an issue.

On the other hand, in areas with heavy snowfall, the load acting on the beams that form the portal frame tends to be large, which necessitates the size of the beams being increased. However, if the size of the beams in the portal frame alone is increased, it will differ from the size of the beams in the general frame, which leads to issues such as the need to use different methods of fixing the exterior walls between the portal frame and the general frame.

In this way, in a building frame formed by a portal frame with a large opening and a general frame, even if the floor height of the general frame changes or the load applied to the portal frame changes, there is a strong demand for a building frame that does not require an increase in wall thickness and does not require different methods of fixing the exterior walls between the portal frame and the general frame.

Patent Document 1 proposes a garage that has a garage top portion that forms the garage top surface, and a number of support members that are columnar and have the properties of a load-bearing wall, and that are positioned at multiple locations that overlap with the sides of the garage top portion in a plan view and support the garage top portion.

JP 2010-209647 A

Patent Document 1 discloses a garage-related structure, but as mentioned above, it does not resolve the inherent problems that arise with building structures formed from a gate-type structure with a large opening and a general structure.

The present invention was made in consideration of the above problems, and aims to provide a building frame formed by a portal frame with a large opening and a general frame, in which there is no need to increase the wall thickness even when the floor height of the general frame changes or the load applied to the portal frame changes, and there is no need to use different methods of fixing the exterior walls between the portal frame and the general frame.

In order to achieve the above object, one aspect of the building frame according to the present invention is as follows:
A building frame in which a portal frame and a general frame are connected,
The portal frame is
A ladder beam having an upper chord, a lower chord, and a plurality of vertical members connecting the upper chord and the lower chord;
A ladder-type column includes at least two columns and a plurality of cross members connecting the two columns, and supports the ladder-type beam to form a portal frame together with the ladder-type beam.
The beams forming the general structure are connected to the upper chord or the lower chord.

According to this aspect, the portal frame has ladder beams in addition to ladder columns, and the upper or lower chords forming the ladder beams are connected to the beams of the general frame, so that even if the floor height of the general frame is increased, moving only the upper chords upward (changing the length of the vertical members of the ladder beams) does not cause the ladder columns to become relatively slender and lose rigidity. In addition, since the ladder beams of the portal frame are generally more rigid than the beams of the general frame, even if the load acting on the ladder beams of the portal frame with a large opening increases, the beams of the general frame and the upper or lower chords connected to them can have the same cross section, and the method of fixing the exterior walls can be the same between the portal frame and the general frame.

Here, the "large opening" of the portal frame means a large span opening with an opening width of, for example, about 4P to 10P (P indicates the module, and can be set between 800mm and 1100mm, for example, 910mm width, etc., depending on the module design specifications). The ladder beam may be a Vierendeel structure beam with vertical members, or a structure beam with vertical members including both vertical members and diagonal members. In either form, the upper chord member, the lower chord member, and the multiple vertical members are welded or bolted to form a ladder beam that resists external forces as a single upper chord member and lower chord member. Furthermore, the general frame may share the ladder column at one end of the portal frame with the portal frame, and the other column of the general frame may be provided with a load-bearing wall in addition to a general column.

Another aspect of the building frame according to the present invention is
This is characterized in that the beams forming the general section frame and the upper chord and/or the lower chord, which are connected to each other, have cross sections of the same size.

According to this aspect, the beams and the upper and/or lower chords that form the general frame, which are connected to each other, have the same size cross section, so that the fixing method (fixing position) of the exterior wall panels can be made common (identical) between the portal frame and the general frame, and further, the size (and specifications) of the beams applied to the building frame can be made common, thereby reducing the construction costs of the building frame.

Another aspect of the building frame according to the present invention is
A characteristic of this structure is that connecting members are provided at positions in the space between the upper chord and the lower chord that correspond to the two columns.

According to this embodiment, by providing a connecting member at a position corresponding to the two columns in the space between the upper chord and the lower chord, a highly rigid ladder-shaped beam end structure can be formed in which the upper chord and the lower chord are integrated through the connecting member at or near the corner where a large bending moment and shear force occur in a portal frame, and the end structure can withstand the large bending moment and shear force. Here, the connecting member may be a vertical member constituting the ladder-shaped beam, or a member separate from the vertical member. In addition to a form in which two connecting members are attached at positions corresponding to the two columns in the space between the upper chord and the lower chord, a single horizontal connecting member may be attached so as to straddle the two columns in the space between the upper chord and the lower chord. This connecting member is also joined to the upper chord and the lower chord by welding or bolting, just like the vertical members.

Another aspect of the building frame according to the present invention is
The columns forming the ladder-shaped columns and the columns forming the general frame have the same size cross section.

According to this aspect, the columns forming the ladder columns and the columns forming the general frame have the same size cross section, so that the size (and standard) of the columns applied to the building frame can be made common, reducing the construction cost of the building frame. Combined with the fact that the size (and standard) of the beams applied to the building frame can be made common as described above, it becomes possible to further reduce the construction cost of the building frame.

Another aspect of the building frame according to the present invention is
A portion of the space between the upper chord and the lower chord is provided for the passage of piping.

According to this aspect, since there are multiple spaces separated by multiple vertical members between the upper and lower chords that form the ladder beam, one or more of these spaces can be used to pass through various types of piping (ventilation piping, electrical equipment piping, etc.), eliminating the need to provide a separate sleeve for piping passage as in conventional structures.

In another aspect of the building frame according to the present invention,
The gate-shaped frame is a frame forming a garage or a frame forming a store,
A feature of the structure is that the lower chord also serves as a wind-resistant frame.

According to this aspect, by applying a ladder beam, the lower chord that forms the ladder beam can also serve as a wind-resistant frame, eliminating the need to provide a separate wind-resistant frame. For example, if a shutter or other opening reinforcement is installed on the large opening of a built-in garage, a wind-resistant frame is required, but the lower chord of the ladder beam serves as this wind-resistant frame.

As can be understood from the above explanation, the building frame of the present invention can provide a building frame formed by a portal frame with a large opening and a general frame, in which even if the floor height of the general frame changes or the load applied to the portal frame changes, there is no need to increase the wall thickness, and the method of fixing the exterior wall does not need to be different between the portal frame and the general frame.

FIG. 2 is a front view of an example of a building frame according to the embodiment. This is a view taken along the line II-II in Figure 1, showing the floor plan of the second floor of the building. This is a view taken along the line III-III in Figure 2, showing an intermediate floor plan between the first and second floors of the building. FIG. 2 is an enlarged view of a portion IV in FIG. 1, showing an enlarged corner portion of the gate frame. FIG. 2 is an enlarged view of a portion V in FIG. 1, showing a part of a ladder beam. This is a view taken along the arrow VI in Figure 5, showing the ladder beam from the longitudinal direction of the upper chord and the lower chord. FIG. 7 is an enlarged view of part VII in FIG. 1 , showing an enlarged view of the connection part of the H-shaped steel forming the upper chord member. FIG. 8 is a view taken in the direction of an arrow VIII in FIG. 7 . This is a schematic diagram explaining the connection structure between the beams (girths) between the floors of the general structure and the exterior wall panels on the first and second floors. This is a schematic diagram explaining the connection structure between the ladder beams between the floors of the portal frame and the exterior wall panels on the first and second floors. FIG. 1 is a schematic diagram illustrating the connection structure between a large beam (girther) between floors of a portal frame and the exterior wall panels on the first and second floors in a conventional example. FIG. 1 is a schematic diagram showing an exterior wall panel in the connection area between the portal frame and the general frame before horizontal load is applied during an earthquake. 1 is a schematic diagram showing an exterior wall panel in the connection area between the portal frame and the general frame when a horizontal load is applied during an earthquake. FIG. FIG. 13 is a schematic diagram showing an exterior wall panel in a connection area between a portal frame and a general frame in a conventional example when a horizontal load is applied during an earthquake.

The building frame according to the embodiment will be described below with reference to the attached drawings. Note that in this specification and the drawings, substantially identical components may be designated by the same reference numerals to avoid redundant description.

[Building frame according to the embodiment]
An example of a building frame according to the embodiment will be described with reference to Figs. 1 to 10. Here, Fig. 1 is a front view of an example of a building frame according to the embodiment, Fig. 2 is a view taken along the line II-II of Fig. 1, which is a floor plan of the second floor of the building, and Fig. 3 is a view taken along the line III-III of Fig. 2, which is an intermediate floor plan between the first and second floors of the building. Fig. 4 is an enlarged view of part IV of Fig. 1, which is an enlarged view of a corner part of a portal frame, and Fig. 5 is an enlarged view of part V of Fig. 1, which is an enlarged view of a part of a ladder beam. Furthermore, Fig. 6 is an enlarged view of part VI of Fig. 5, which is a view of the ladder beam from the longitudinal direction of the upper chord and the lower chord, Fig. 7 is an enlarged view of part VII of Fig. 1, which is an enlarged view of a connection part of an H-shaped steel forming the upper chord, and Fig. 8 is an enlarged view of part VIII of Fig. 7.

The illustrated building frame 70 has a gate-shaped frame 30 and a general frame 60 that are connected to each other within the same structural plane. The illustrated example shows one structural plane to which exterior wall panels are attached in a multi-story building with two or more floors. Here, a building having a building frame 70 is a building with a built-in garage or a building with a store on the first floor, etc., and the gate-shaped frame 30 that forms the building frame 70 is a frame that forms the garage opening of the built-in garage or the opening of the store, etc.

The portal frame 30 has a ladder beam 20 and two ladder columns 10 that support the ladder beam 20 at both ends.

The ladder-shaped column 10 has two columns 11 standing at a distance from each other and multiple cross members 12 connecting the two columns 11 horizontally. The multiple horizontally extending cross members 12 are arranged at intervals in the longitudinal direction (vertical direction) of the columns 11 and are welded to the two columns 11. In this specification, "welding" refers to appropriate welding, such as groove welding (full penetration welding, partial penetration welding) and fillet welding, that is selected according to the strength required for the connection and the type of connection (rigid connection, pin connection).

The column 11 is formed from a square steel pipe, and a base plate 13 is welded to its lower end, and the base plate 13 is fixed to a concrete (reinforced concrete) foundation 75 by anchor bolts 18. Note that the column 11 may be made of steel material such as H-shaped steel in addition to the square steel pipe.

The cross member 12 is made of steel plate and is welded to the column 11.

As shown in detail in FIG. 4, a block-shaped connector 15 is welded to the top end of the column 11, and the connector 15 is bolted to the lower chord 22 that forms the ladder beam 20 by a bolt 17.

The length (height) t1 of the ladder-type column 10 is the length between the foundation 75 to which the column 11 is bolted and the lower chord 22 of the ladder-type beam 20. In addition, the width t2 between the two ladder-type columns 10 that form the large opening (the distance between the outer columns 11 of the ladder-type columns 10) can be set in the range of about 4P to 10P, and any distance within this range at 0.5P intervals (4.5P, 5P, 5.5P, etc.) can be selected.

On the other hand, the ladder beam 20 has an upper chord 21, a lower chord 22, and multiple vertical members 23 connecting the upper chord 21 and the lower chord 22, and is a ladder beam of a Vierendeel structure in which the vertical members 35 are vertical members. Note that the ladder beam may have diagonal members in addition to the vertical members as vertical members, and may have a structure in which the upper chord 21 and the lower chord 22 are connected by both vertical members and diagonal members.

The upper chord 21 and the lower chord 22 are both made of H-shaped steel, and the vertical members 23 are high-rigidity members made of steel pipes or square pipes, etc., and their upper and lower ends are rigidly joined to the upper chord 21 and the lower chord 22 by welding or bolts. The total height of the ladder beam 20 can be set to approximately 500 mm to 800 mm (for example, 600 mm), and when H-200 or H-250 is used for the upper chord 21 and the lower chord 22, square pipes with a height of approximately 100 mm to 300 mm are used for the vertical members 23.

As shown in FIG. 1, because the width t2 between the two ladder columns 10 is wide, the upper chord 21 is connected to two H-shaped steels 21' via connection parts 21a, and the lower chord 22 is connected to two H-shaped steels 22' via connection parts 22a. For example, by locating both connection parts 21a, 22a at positions offset from each other in the longitudinal direction of the ladder beam 20, it is possible to prevent the connection parts 21a, 22a from becoming structurally weak parts of the ladder beam 20.

As shown in Figures 7 and 8, at connection part 21a (connection part 22a has a similar configuration), the left and right H-shaped steels 21' are rigidly connected by both webs being bolted with bolts 21c via splice plates 21b, and both upper and lower flanges being bolted with bolts 21e via separate splice plates 21d.

As shown in Figures 1 and 5, at the points where the vertical members 23 are connected to the upper chord member 21 and the lower chord member 22, reinforcing ribs 21f, 22f are provided that are welded to the respective webs and the upper and lower flanges.

As shown in FIG. 6, an end plate 25 is welded to the interior side of the lower chord 22, and an end plate 27 is welded to the end of a small beam 26 made of H-shaped steel that serves as an underfloor storage space or intermediate floor. Both end plates 25, 27 are bolted together to connect the lower chord of the ladder beam 20 to the small beam 26 extending toward the interior side.

As shown in detail in FIG. 4, at the corner of the portal frame 30, two connecting members 29A, 29B are welded to the upper chord 21 and the lower chord 22 that form the ladder beam 20. More specifically, the two columns 11 that form the ladder column 10 are bolted to the lower chord 22 via connecting fittings 15, and directly above the bolted joint of the lower chord 22, the two connecting members 29A, 29B are welded to both the upper chord 21 and the lower chord 22.

In the illustrated example, one of the connecting members 29A is the same member as the vertical member 23 provided in the general portion of the ladder beam 20, and the other connecting member 29B is the same member as the connecting fittings 15, 85. Note that both connecting members may be either the vertical members 23 or the connecting fittings 15.

In the portal frame 30, when horizontal loads during an earthquake act on the frame, large bending moments and shear forces can act directly above the columns. Therefore, at the connection points of the ladder beam 20 to which the ladder column 10 is connected, two connecting members 29A, 29B connect the upper chord 21 and the lower chord 22 at positions corresponding to the two columns 11 of the ladder column 10, making it possible for the entire ladder beam 20 (total beam height) to resist bending moments, etc.

As shown in FIG. 1, a beam 50 that constitutes the general frame 60 is connected to the upper chord 21 of the ladder beam 20 that constitutes the portal frame 30.

The general frame 60 has a beam 50 and a bearing wall 40, and shares one of the ladder-shaped columns 10 of the portal frame 30.

The bearing wall 40 has a pair of pillars 41, 42 erected at a distance from each other, two dampers 46 attached to one of the pillars 41, a connecting member 44 connecting the two dampers 46, and two braces 43. Each brace 43 is arranged to connect the connecting member 44 to the intersection of the other pillar 42 with the beam 50 and the foundation 75.

The columns 41, 42 are made of square steel pipes, and a base plate 47 is welded to the lower end of each column 41, 42. Each column 41, 42 is fixed to the foundation via its respective base plate 47 by anchor bolts 18.

The brace 43 is made of steel sections such as H-shaped steel, angle steel, and channel steel, as well as square steel pipes.

One side of the damper 46 is welded to a reinforcing plate 45 made of flat steel or the like, and the reinforcing plate 45 is welded to the side of the column 41 made of a square steel pipe. The two dampers 46 are connected by a connecting member 44, and the ends of each brace 43 are welded to the protruding portion of the connecting member 44 that is on the outer side (top and bottom) of the attachment point of the damper 46.

The connecting member 44 is made of steel members such as H-shaped steel and channel steel, or square steel pipes, and has the rigidity to transmit the axial force from the brace 43 to the damper 46.

In the building frame 70 shown in FIG. 1, the beams forming the portal frame 30 are ladder beams 20, and the upper chord 21 forming the ladder beam 20 is connected to the beam 50 forming the general frame 60. Therefore, when the floor height of the general frame 60 is increased, for example, the height of the ladder column 10 can be maintained at the current height t1 by moving only the upper chord 21 of the ladder beam 20 upward in the portal frame 30 (by changing the length of the vertical member 23 of the ladder beam 20). This prevents the problem of the ladder column 10 losing its rigidity due to the height t1 of the ladder column 10 being higher (more slender) than it is now.

In addition, according to the inventors' verification, even if the floor height of the general section frame 60 is initially 2630 mm (the same applies to the length of the ladder-type column 10), and the floor height of this general section frame 60 increases to 2950 mm, the length of the initial ladder-type column 10 (2630 mm) can be maintained by applying the ladder-type beam 20, and it has been demonstrated that this increases the rigidity of the ladder-type column 10 by 1.5 times compared to the conventional example.

In addition, since the ladder beams 20 of the portal frame 30 are more rigid than the beams 50 of the general frame 60, even when the load acting on the ladder beams 20 of the portal frame 30 with a large opening is large, such as in a snow-covered area, the upper chord 21 joined to the beams 50 of the general frame 60 can be made to have the same cross-section size as the beams 50, and the method of fixing the exterior walls can be made the same between the portal frame 30 and the general frame 60.

Here, the upper chord 21 forming the ladder beam 20 and the beam 50 forming the general frame 60 are made of H-shaped steel of the same standard and with the same cross section size. This allows the fixing method (fixing position) of the exterior wall panels to be common (identical) as described above, and furthermore, the size (and standard) of the beams applied to the building frame 70 can be common, thereby reducing the construction cost of the building frame 70.

In the illustrated example, the upper chord 21 and the lower chord 22 are formed from H-shaped steel with cross-sections of different sizes, but both may be formed from H-shaped steel of the same size and standard. In this case, the upper chord 21 and the lower chord 22, and all of the beams 50 of the general structure 60 will be formed from H-shaped steel of the same size and standard, which will further reduce construction costs.

Furthermore, it is preferable that the columns 11 forming the ladder-shaped columns 10 of the portal frame 30 and the columns 41, 42 forming the load-bearing walls 40 of the general frame 60 are also made of square steel pipes of the same size and standard, which, together with the standardization of the beam sizes and standards, makes it possible to further reduce the construction costs of the building frame 70.

As is also clear from FIG. 1, the ladder beam 20 has a number of spaces 24 separated by a number of vertical members 23 between the upper chord 21 and the lower chord 22. By providing a portion of this space 24 for the passage of various pipes (ventilation pipes, electrical equipment pipes, etc.), it is no longer necessary to provide a separate sleeve for the passage of pipes as in conventional structures.

When the portal structure 30 is a structure that forms a large opening for a built-in garage, the large opening is fitted with opening reinforcement such as a shutter, and a wind-resistant frame is required, but by applying the ladder beam 20, the lower chord 22, which is a component of the ladder beam 20, can also serve as a wind-resistant frame.

As shown in Figure 2, in the illustrated example building, the floor surface forming the second floor of the general section is directly above the built-in garage, which is rectangular in plan view, and ladder beams 20 are applied between the four floors that form the built-in garage. The ends of the small beams 64 that support the second floor of the general section are attached to the ladder beams 20 on the inside of the room, and horizontal braces 65 are spanned across the horizontal structure.

As shown in Figure 3, ladder beams 20 are used between the four floors directly above the built-in garage, allowing for underfloor storage or a down floor to be created between the second floor and the ceiling of the built-in garage. A horizontal brace 28 is installed across the small beams 26 directly above the built-in garage, which are connected to the lower chords 22 of the ladder beams 20.

Next, referring to FIG. 9, the connection structure between the ladder beams and the exterior wall panels that constitute the building frame according to the embodiment will be described while comparing it with the connection structure between the beams between floors and the exterior wall panels in the conventional example. Here, FIG. 9A is a schematic diagram explaining the connection structure between the beams (girths) between floors of the general frame and the exterior wall panels of the first and second floors, and FIG. 9B is a schematic diagram explaining the connection structure between the ladder beams between floors of the portal frame and the exterior wall panels of the first and second floors. Also, FIG. 9C is a schematic diagram explaining the connection structure between the large beams (girths) between floors of the portal frame and the exterior wall panels of the first and second floors in the conventional example.

In the general frame shown in FIG. 9A, fittings 93, 94 are attached to the upper and lower flanges of a beam 50 formed from H-shaped steel, and a second floor exterior wall panel 91 and a first floor exterior wall panel 92 are attached with bolts 95 via the fittings 93, 94.

In the building frame 70 according to the embodiment, the upper chord 21 of the ladder beam 20 forming the portal frame 30 shown in FIG. 9B is connected to the beam 50 of the general frame 60 shown in FIG. 9A. Therefore, in the portal frame 30, similar to the general frame 60, the connecting fittings 93, 94 are attached to the upper and lower flanges of the upper chord 21 formed from H-shaped steel of the same size as the beam 50, and the second floor exterior wall panel 91 and the first floor exterior wall panel 92 are attached with bolts 95 via the connecting fittings 93, 94.

In this way, in the building frame 70 according to the embodiment, the fixing positions of the exterior wall panels can be made common between the portal frame 30 and the general frame 60. Also, as shown in FIG. 9B, a space 24 exists between the upper chord 21 and the lower chord 22, so that workers can reach into the space 24 from the inside of the room to install the exterior wall panels.

In the conventional example, as shown in FIG. 9C, a beam 21A made of a large H-shaped steel is applied to the portal frame for the general frame 60 shown in FIG. 9A, and fittings 93, 94 are attached to the upper and lower flanges of this large H-shaped steel 21A, and the second floor exterior wall panel 91 and the first floor exterior wall panel 92 are attached with bolts 95 via the fittings 93, 94.

As is clear from a comparison of Figures 9A and 9C, the sizes of the beams 50 and 21A differ greatly, resulting in different fixing positions of the exterior wall panels between the portal frame and the general frame.

Next, referring to FIG. 10, the rocking behavior of the exterior wall panel when a horizontal load during an earthquake acts on the connection area of the portal frame and the general frame of the building frame according to the embodiment will be described while comparing it with the rocking behavior of the exterior wall panel in the connection area of the portal frame and the general frame of the conventional example. Here, FIG. 10A is a schematic diagram showing the exterior wall panel in the connection area of the portal frame and the general frame before the horizontal load during an earthquake acts on it, and FIG. 10B is a schematic diagram showing the exterior wall panel in the connection area of the portal frame and the general frame when the horizontal load during an earthquake acts on it. Also, FIG. 10C is a schematic diagram showing the exterior wall panel in the connection area of the portal frame and the general frame of the conventional example when the horizontal load during an earthquake acts on it.

In the building frame shown in Figure 10A before the horizontal load during an earthquake acts on it, the exterior wall panels 92, 91 on the first and second floors are installed side by side with vertical and horizontal joints. When the horizontal load H during an earthquake acts on this building frame, as shown in Figure 10B, each exterior wall panel 91, 92 will exhibit rocking behavior. However, since the fixed positions of the exterior wall panels 91, 92 are the same with respect to the upper chord member 21 of the ladder beam 20 that is connected to them and the beam 50 of the general frame, the rocking behavior of the exterior wall panels 91, 92 will be about the same, and therefore there is no risk of the exterior wall panels 91, 92 colliding with each other.

In contrast, in the conventional example, as shown in FIG. 10C, the fixed positions of the exterior wall panels 91, 92 differ with respect to the beams 21A of the portal frame and the beams 50 of the general frame, which are connected to each other. This causes the rocking behavior of the exterior wall panels 91, 92 to differ, and a collision S occurs in part of the exterior wall panels 91, 92, which can lead to damage to the exterior wall panels 91, 92.

In this way, with the building frame 70, the fixing positions of the exterior wall panels 91, 92 are common to the upper chord 21 of the interconnected ladder beam 20 and the beam 50 of the general frame, so that damage caused by collisions between the exterior wall panels 91, 92 when horizontal load H is applied during an earthquake can be effectively prevented.

Note that the configurations described in the above embodiments may be combined with other components, and the present invention is not limited to the configurations shown here. In this regard, changes can be made without departing from the spirit of the present invention, and can be determined appropriately according to the application form.

10: Ladder column 11: Column 12: Cross member 13: Base plate 15: Connection metal fitting 17: Bolt 18: Anchor bolt 20: Ladder beam 21: Upper chord member 21A: Beam (large H-shaped steel)
21': H-shaped steel 21a: Connection 21b, 21d: Splice plate 21c, 21e: Bolt 21f: Reinforcement rib 22: Lower chord 22': H-shaped steel 22a: Connection 22f: Reinforcement rib 23: Vertical member 24: Space 25: End plate 26: Beam 27: End plate 28: Horizontal brace 29A, 29B: Connecting member 30: Portal frame 40: Bearing wall 41, 42: Column 43: Brace 44: Connecting member 45: Reinforcement plate 46: Damper 47: Base plate 50: Beam 60: General frame 64: Beam 65: Horizontal brace 70: Building frame 75: Foundation 80: Column 85: Connecting metal fitting 87: Bolt 91, 92: Exterior wall panel 93, 94: Connector fittings 95: Bolt H: Horizontal load S: Collision

Claims (6)

A building frame in which a portal frame and a general frame are connected,
The portal frame is
A ladder beam having an upper chord, a lower chord, and a plurality of vertical members connecting the upper chord and the lower chord;
The ladder-shaped beam includes at least two columns and a plurality of cross members connecting the two columns, and supports the ladder-shaped beam to form a portal frame together with the ladder-shaped beam.
The general frame includes a beam, a column supporting the beam, and one of the ladder-shaped columns,
A building structure, characterized in that the beams forming the general structure are connected to the upper chord or the lower chord. A building frame in which a portal frame and a general frame are connected,
The portal frame is
A ladder beam having an upper chord, a lower chord, and a plurality of vertical members connecting the upper chord and the lower chord;
A ladder-type column includes at least two columns and a plurality of cross members connecting the two columns, and supports the ladder-type beam to form a portal frame together with the ladder-type beam.
A beam forming the general frame is connected to the upper chord or the lower chord ,
A building structure, characterized in that the beams forming the general section frame and the upper chord and/or the lower chord, which are connected to each other, have cross sections of the same size. The building frame according to claim 1 or 2, characterized in that a connecting member is provided in the space between the upper chord and the lower chord at a position corresponding to the two columns. A building frame in which a portal frame and a general frame are connected,
The portal frame is
A ladder beam having an upper chord, a lower chord, and a plurality of vertical members connecting the upper chord and the lower chord;
A ladder-type column includes at least two columns and a plurality of cross members connecting the two columns, and supports the ladder-type beam to form a portal frame together with the ladder-type beam.
A beam forming the general frame is connected to the upper chord or the lower chord ,
A building frame, characterized in that the columns forming the ladder-shaped columns and the columns forming the general frame have the same size cross-section. A building frame in which a portal frame and a general frame are connected,
The portal frame is
A ladder beam having an upper chord, a lower chord, and a plurality of vertical members connecting the upper chord and the lower chord;
A ladder-type column includes at least two columns and a plurality of cross members connecting the two columns, and supports the ladder-type beam to form a portal frame together with the ladder-type beam.
A beam forming the general frame is connected to the upper chord or the lower chord ,
A building structure, characterized in that a portion of the space between the upper chord and the lower chord is provided for the passage of piping. The gate-shaped frame is a frame forming a garage or a frame forming a store,
The building structure according to any one of claims 1 to 5, characterized in that the lower chord member also serves as a wind-resistant frame.

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