JP6899264B2 - Architectural structure with roof frame - Google Patents

Description

The present invention relates to a building structure including a roof frame overhanging like a cantilever.

Many of the building structures such as stadiums that have fields for various competitions, sports, and entertainments are provided with stands that form spectator stands around the fields. Patent Document 1 discloses a structure in which a roof frame is provided so as to cover the upper part of the stand portion in a building structure provided with such a stand portion.

By the way, the roof frame disclosed in Patent Document 1 is provided so as to cover the entire stand portion and the field, but the roof frame is mainly provided above the stand portion around the field and has a central portion. An opening may be provided above the field portion of the. In such a roof frame, the base end portion is supported on the side (rear) away from the field in the stand portion, and the tip end portion projects in the shape of a cantilever so as to project toward the field side (front).
In this way, the roof frame overhanging like a cantilever may shake significantly when an earthquake occurs. In particular, even when a horizontal sway is caused by an earthquake, the roof frame may sway in the vertical direction with the base end side as the center. TV cameras, lights, etc. may be hung on the roof of the stadium, but when such hangings are provided at the tip of the roof frame, the vertical sway will further increase. Design becomes difficult.

As one of the measures to suppress the shaking of the roof frame overhanging like a cantilever, the so-called deformation is suppressed by making the entire roof frame hard by increasing the cross-sectional area of the members constituting the roof frame. It is conceivable to adopt a seismic structure.
However, if the roof frame has a seismic structure, the vibration cycle when an earthquake occurs is shortened and the response acceleration is also high. As a result, the shaking of the roof frame cannot be effectively suppressed.

As one of the measures to suppress the shaking of the roof frame overhanging like a cantilever, it is conceivable to install a seismic isolation device such as a laminated rubber bearing in the layer below the base end of the roof frame, so-called seismic isolation structure. .. When the seismic isolation structure is adopted, the vibration cycle of the building structure can be lengthened by the seismic isolation device, and the response acceleration can be suppressed.
However, in the seismic isolation structure, one extra layer is required for the building structure as the seismic isolation layer for providing the seismic isolation device. For this reason, there is a problem that the construction takes a long time and a space for providing a seismic isolation layer is required. Further, when the tip of the roof frame sways in the vertical direction, a vertical tensile force is input to the seismic isolation device, but the seismic isolation device has a problem that it is weak in the vertical tensile force.

Japanese Unexamined Patent Publication No. 2014-69121

An object of the present invention is a building structure having a roof frame, which can effectively suppress the shaking of a roof frame overhanging like a cantilever, suppress the lengthening of construction, and make effective use of space. Is to provide.

The present invention employs the following means in order to solve the above problems.
That is, the building structure having the roof frame of the present invention includes a substructure portion of a ramen structure composed of a plurality of pillars constructed on the foundation and beams erected between the pillars adjacent to each other, and the above. An upper structure portion having a cantilever-shaped roof frame provided above the lower structure portion, the base end portion being a fixed end, and the tip portion extending laterally from the base end portion to be a free end. The lower structure portion is characterized by having a flexible structure having a lower rigidity than the upper structure portion.
According to such a configuration, by making the lower structure part a flexible structure composed of a rigid frame frame with respect to the upper structure part having a roof frame, a so-called soft story vibration damping structure is used in a building structure having a roof frame. Can be introduced. As a result, when an earthquake occurs, the deformation can be concentrated on the substructure to absorb the seismic energy. Therefore, without providing a seismic isolation layer having a seismic isolation device, it is possible to suppress deformation of the superstructure portion having the roof frame and suppress shaking of the roof frame, particularly shaking in the vertical direction at the tip portion of the roof frame. Moreover, since it is not necessary to provide a seismic isolation layer having a seismic isolation device, there is no need for a construction period or space for providing the seismic isolation layer.

In one aspect of the present invention, in the building structure having the roof frame of the present invention, the upper structural portion is provided on the upper floor portion provided on the lower structural portion and on the upper floor portion. The roof frame has the roof frame, and the upper floor portion is provided with a pillar-beam frame composed of an upper-layer column extending in the vertical direction and an upper-layer beam extending in the horizontal direction, and extending in an oblique direction with respect to a horizontal plane. It includes a slanted beam supported by the beam-column frame and a reinforcing brace provided on the beam-column frame.
According to such a configuration, in the superstructure part, the superstructure part supporting the roof frame is reinforced by the oblique beam and the reinforcing brace, and the superstructure part is made stronger than the flexible structure lower structure part. It can be a rigid structure. As a result, the effect of the soft story vibration damping structure, which suppresses the deformation of the superstructure having the roof frame, is more remarkable by concentrating the deformation on the lower structure of the flexible structure and absorbing the seismic energy. be able to.

In one aspect of the present invention, the building structure having the roof frame of the present invention includes a damper portion in which the lower structural portion damps the relative displacement of the beams located above and below each other in the horizontal direction. ..
According to such a configuration, the deformation and shaking of the superstructure portion having the roof frame can be more reliably suppressed by damping the deformation generated concentrated in the lower structure portion of the flexible structure by the damper portion.

In one aspect of the present invention, the building structure having the roof structure of the present invention has an opening in the central portion when the roof structure is viewed in a plan view, and is an annular shape continuous in the circumferential direction on the outer peripheral side of the opening. The damper portions are provided at a plurality of locations in the circumferential direction, and the radial damper portions located in the vertical plane including the radial direction from the opening to the outside in the radial direction and the vertical damper portion including the circumferential direction. It is equipped with a circumferential damper portion located in the plane.
According to such a configuration, in a roof frame that is continuous in an annular shape when viewed in a plan view, the radial damper portion and the circumferential damper portion are provided at a plurality of locations in the circumferential direction, so that the substructure portion due to the vibration component in all directions is provided. Deformation can be effectively suppressed.

In one aspect of the present invention, the substructure portion is composed of a plurality of layers.
According to such a configuration, it is possible to more easily realize a flexible structure having a lower rigidity than the upper structure portion in the lower structure portion, and the effect of the soft story vibration damping structure can be more remarkably exhibited.

According to the present invention, it is possible to effectively suppress the shaking of the roof frame overhanging in the shape of a cantilever, suppress the lengthening of construction, and effectively utilize the space.

It is sectional drawing which shows the structure of the stand part of the building structure having a roof frame. It is a top view which shows the building structure which had a roof frame. It is a top view which shows the layout example of the damper part in the lower structure part. It is a top view which shows the layout example of the reinforcement brace in the upper floor part. It is the figure which showed the state of the deformation of the stand part in the event of an earthquake schematically. It is a figure which shows the result of simulating the maximum response interlayer deformation angle of the audience seat part which consists of a lower structure part and the upper floor part in the stand part as described above. It is a figure which shows the result of having simulated about the maximum response layer shear force coefficient of the audience seat part which consists of a lower structure part and the upper floor part. It is a figure which shows the result of simulating the maximum response acceleration of the audience seat part which consists of a lower structure part and the upper floor part. It is a figure which shows the result of the simulation about the maximum response vertical acceleration in the roof body of a roof frame. It is a figure which shows the result of having simulated about the maximum response bending moment in the roof body of a roof frame.

Hereinafter, with reference to the attached drawings, a mode for carrying out a building structure having a roof frame according to the present invention will be described with reference to the drawings.

FIG. 1 shows a cross-sectional view showing the configuration of a stand portion of a building structure having a roof frame. FIG. 2 shows a plan view showing a building structure having a roof frame.
As shown in FIGS. 1 and 2, the building structure 1 is a so-called stadium, and is provided in the central portion so as to surround the field 2 for competitions, sports, entertainment, etc. and the outer peripheral side of the field 2. A stand portion 3 provided continuously in an annular shape in the circumferential direction is provided.
As shown in FIG. 1, the stand portion 3 includes a lower structure portion 10 and an upper structure portion 20 having an upper floor portion 40 and a roof frame 30. The lower structure portion 10 and the upper floor portion 40 provided on the lower structure portion 10 each have a plurality of layers 9 in the vertical direction. In the present embodiment, the lower structure portion 10 has the first floor 9A to the third floor 9C, and the upper floor portion 40 has the fourth floor 9D to the seventh floor 9G.
Further, as shown in FIG. 2, the roof frame 30 has an opening 34 in the central portion when viewed in a plan view, and is provided in an annular shape continuous in the circumferential direction on the outer peripheral side of the opening 34.

As shown in FIG. 1, the substructure portion 10 is provided on a foundation 6 constructed on the ground. In the present embodiment, the lower structure portion 10 has three layers in the vertical direction.
The lower structure portion 10 is a rigid frame structure composed of a plurality of lower floor columns (columns) 11 constructed on the foundation 6 and lower floor beams (beams) 12 erected between the lower floor columns 11 adjacent to each other. It is said that. Here, the frame surface of the rigid frame structure composed of the lower floor columns 11 and the lower floor beams 12 intersects the vertical plane including the radial direction extending from the field 2 side to the outer peripheral side in the radial direction when viewed in a plan view. It is provided so as to be located in the vertical plane including the circumferential direction.
The lower floor pillars 11 are made of steel pipes made of high-strength materials on the first floor 9A and the second floor 9B. By forming the lower floor pillar 11 with a high-strength material, the cross-sectional area of the lower floor pillar 11 is reduced, and the deformation performance of the lower floor pillar 11 at the time of an earthquake is improved while ensuring the strength. Further, in the third floor 9C of the lower structure portion 10, only the lower floor pillars 11S located on the outer peripheral side away from the field 2 and supporting the roof frame 30 described later are made of precast concrete. In the 3rd floor 9C, the lower floor pillar 11 on the field 2 side excluding the lower floor pillar 11S on the outer peripheral side is made of a steel pipe made of a high-strength material like the 1st floor 9A and the 2nd floor 9B.
In the lower structure portion 10, all the lower floor beams 12 are made of a steel frame made of a high-strength material. A floor slab 13 that forms a floor for each layer (each floor) of the lower structure portion 10 is provided on the lower floor beam 12. The floor slab 13 is integrally provided on the lower floor beam 12 via a stud (not shown). As a result, the lower floor beam 12 constitutes a composite beam integrated with the floor slab 13 and has high rigidity.
Here, one end of the lower floor beam 12S located on the outer peripheral side away from the field 2 is rotatably and displaceably connected to the lower floor pillar 11S via the pin 12P.

Such a lower structure portion 10 has a rigid frame structure including a lower floor column 11 and a lower floor beam 12, and has a flexible structure having a lower layer rigidity than the upper structure portion 20 described later.
Further, the lower structure portion 10 is provided with a damper portion having a V-shaped brace 14 and a damper 15 in a portion surrounded by the lower floor pillars 11 adjacent to each other and the lower floor beams 12 located above and below each other. 16 is provided. The upper end of the brace 14 is connected to the joint between the upper lower floor beam 12 and the two lower floor columns 11 adjacent to each other. The damper 15 is composed of, for example, an oil damper, and is provided between the lower end portion of the brace 14 and the lower lower floor beam 12. The damper portion 16 damps the relative displacement of the lower floor beams 12 located above and below each other in the horizontal direction by the damper 15.

FIG. 3 shows a plan view showing a layout example of the damper portion in the lower structure portion.
Such a damper portion 16 is provided in each layer of the lower structure portion 10. Further, as shown in FIG. 3, the damper portions 16 are provided so as to be dispersed at a plurality of locations in the circumferential direction in which the stand portions 3 are continuous. The damper portion 16 includes a radial damper portion 16R located in a vertical plane including a radial direction from the field 2 side (opening 34 side of the roof frame 30) toward the outer peripheral side, and a vertical plane including a circumferential direction (tangential direction). A circumferential damper portion 16S located inside is provided. In each layer of the lower structure portion 10, the radial damper portion 16R and the circumferential damper portion 16S are provided with substantially the same number so that substantially the same damping effect can be obtained in the radial direction and the circumferential direction.

Further, as shown in FIG. 1, the first floor spectator seats 50 are provided on the field 2 side with respect to the lower structure portion 10. The first-floor spectator seats 50 include a plurality of reinforced concrete columns 52 constructed on the foundation 6 and a lowermost inclined beam 51A supported by the columns 52. Here, the plurality of pillars 52 are gradually lowered from the outer peripheral side toward the field 2 side. As a result, the lowermost layer inclined beam 51A is provided so as to be inclined so as to be gradually lowered from the outer peripheral side toward the field 2 side. The lowermost inclined beam 51A is made of steel-framed reinforced concrete. On the lowermost layer inclined beam 51A, a stepped floor (not shown) that gradually increases from the field 2 side toward the outer peripheral side is provided. On the stepped floor (not shown), benches and seats (not shown) on which spectators sit are provided.
The first-floor spectator seat 50 having the lowermost inclined beam 51A is provided separately from the lower structure portion 10 so as to be cut off from the edge.

The upper structure portion 20 has an upper floor portion 40 provided on the lower structure portion 10 and a roof frame 30 provided on the upper floor portion 40.
The upper floor portion 40 is a pillar composed of an upper floor pillar 41 that is continuously provided on each lower floor pillar 11 and extends in the vertical direction, and an upper floor beam 42 erected between the upper floor pillars 41 adjacent to each other. It has a beam frame 43. Here, the structural surface of the column-beam frame 43 composed of the upper floor columns 41 and the upper floor beams 42 intersects the vertical plane including the radial direction extending from the field 2 side to the outer peripheral side in the radial direction when viewed in a plan view. It is provided so as to be located in the vertical plane including the circumferential direction.
The upper floor pillar 41 is made of steel pipe except for the upper floor pillar 41S on the outer peripheral side, which will be described later. Further, in the superstructure portion 20, the upper floor pillar 41S located on the outer peripheral side away from the field 2 and supporting the roof frame 30 described later is continuous with the lower floor pillar 11S and is made of precast concrete.
The upper floor beam 42 is made of a steel structure. A floor slab 46 forming a floor of each layer (each floor) of the upper floor portion 40 is provided on the upper floor beam 42. The floor slab 46 is integrally provided on the upper floor beam 42 via a stud (not shown). As a result, the upper floor beam 42 constitutes a composite beam integrated with the floor slab 46, and has high rigidity.

Reinforcing braces 45 are provided on the column-beam frame 43 of the upper floor 40. The reinforcing brace 45 has, for example, a V shape, the upper end thereof is connected to the joint portion between the upper upper floor beam 42 and the two upper floor columns 41 adjacent to each other, and the lower end portion is connected to the lower upper floor beam 42. It is connected. The column-beam frame 43 is reinforced by the reinforcing brace 45, and has a higher rigidity than the lower structure portion 10.
FIG. 4 shows an example of the layout of the reinforcing braces on the upper floors.
Such reinforcing braces 45 are provided in each layer of the upper floor portion 40, respectively. Further, as shown in FIG. 4, the reinforcing braces 45 are provided so as to be dispersed at a plurality of places in the circumferential direction in which the stand portions 3 are continuous. The reinforcing brace 45 includes a radial reinforcing brace 45R located in the vertical plane including the radial direction from the field 2 side (opening 34 side of the roof frame 30) toward the outer peripheral side, and the reinforcing brace 45 located in the vertical plane including the circumferential direction. A circumferential reinforcement brace 45S is provided. In each layer of the superstructure portion 40, the radial reinforcing brace 45R and the inclined beams 51B and 51C, which are the reinforcing components in the radial direction, and the circumferential reinforcing brace 45S, which is the reinforcing component in the circumferential direction, are formed in the radial direction and the circumferential direction. It is provided so that the same rigidity can be obtained.

Further, as shown in FIG. 1, the upper floor portion 40 is provided with an inclined beam 51B in the middle layer portion and an inclined beam 51C in the upper layer portion on the field 2 side. The plurality of upper floor columns 41 supporting the inclined beams 51B and 51C are gradually lowered from the outer peripheral side toward the field 2 side. As a result, the inclined beams 51B and 51C are provided so as to be inclined so as to be gradually lowered from the outer peripheral side toward the field 2 side, respectively. The inclined beams 51B and 51C are made of steel-framed reinforced concrete. On the inclined beams 51B and 51C, stepped floors (not shown) are provided, which gradually increase from the field 2 side toward the outer peripheral side, respectively. On the stepped floor (not shown), benches and seats (not shown) on which spectators sit are provided.

The roof frame 30 is supported by an upper floor portion 40 provided on the lower structure portion 10. The roof frame 30 has a roof support portion 31 extending upward from the upper part on the outer peripheral side separated from the field 2 and a roof main body 32 supported by the roof support portion 31 in the upper floor portion 40.
The roof support portion 31 has a support pillar 33 continuously provided on the upper floor pillar 41S made of precast concrete located on the outer peripheral side of the upper floor portion 40.
The roof body 32 is provided so that the base end portion 32b is fixed to the roof support portion 31 and the tip end portion 32s extends from the base end portion 32b to the field 2 side (side). Such a roof body 32 has a cantilever shape in which the base end portion 32b is fixed to the roof support portion 31 and the tip end portion 32s is a free end. The roof body 32 has, for example, a truss structure, and includes an upper chord member 32f, a lower chord member 32g provided below the upper chord member 32f, and a connecting member 32h provided in a zigzag shape between the upper chord member 32f and the lower chord member 32g. Have. A roofing material 35 is laid on the upper chord material 32f.

FIG. 5 shows a diagram schematically showing the deformation of the stand portion when an earthquake occurs.
In the above configuration, when an earthquake occurs, the deformation is concentrated on the flexible lower structure 10 with respect to the upper structure 20. As a result, as shown in FIG. 5, in the lower structural portion 10, the lower floor columns 11S are flexed and deformed as the lower floor beams 12 located above and below each other are displaced relative to each other in the horizontal direction. Further, the relative displacement of the lower floor beams 12 located above and below each other in the horizontal direction is damped by the damper 15 of the damper portion 16, and the deformation of the lower structure portion 10 is damped. Further, since the lower structure portion 10 is separated from the first-floor spectator seat 50 and separated from the first-floor spectator seat 50, the deformation of the lower structure portion 10 is suppressed from being hindered by the first-floor spectator seat 50.
On the other hand, the superstructure portion 20 provided on the lower structure portion 10 has a rigid structure in which the upper floor portion 40 is strongly reinforced by the reinforcing braces 45 and the inclined beams 51B and 51C. Therefore, the upper structure portion 20 is displaced in the horizontal direction as the lower structure portion 10 is deformed, while the entire amount of deformation is suppressed. As a result, the roof body 32 of the roof frame 30 can suppress the tip portion 32s from swinging in the vertical direction.

FIG. 6 shows the results of simulating the maximum response interlayer deformation angle of the spectator seat portion including the lower structure portion and the upper floor portion in the stand portion as described above. Further, FIG. 7 shows the result of simulating the maximum response layer shear force coefficient of the spectator seat portion composed of the lower structure portion and the upper floor portion in the stand portion as described above. Further, FIG. 8 shows the result of simulating the maximum response acceleration of the spectator seat portion including the lower structure portion and the upper floor portion in the stand portion as described above. In the simulations shown in FIGS. 6 to 8, in addition to the simulation of the vibration damping structure shown in the present embodiment, the simulation was also performed when the conventional seismic resistance structure and seismic isolation structure were adopted for comparison.
As shown in FIG. 6, in the vibration damping structure having the configuration shown in the present embodiment, the maximum response interlayer deformation angle becomes smaller toward the upper floors except for the flexible lower structure, and the seismic isolation structure is used. It is at the same level.
Further, as shown in FIG. 7, in the vibration damping structure provided with the configuration shown in the present embodiment, the maximum response layer shear force coefficient is significantly smaller than that when the seismic structure is adopted, and the seismic isolation structure is used. It is a level close to.
Further, as shown in FIG. 8, in the building structure 1 having the above configuration, the maximum response acceleration of the spectator seat portion including the lower structure portion 10 and the upper floor portion 40 provided on the lower structure portion 10 is high. In the seismic structure, the size increased toward the upper floors, whereas in the vibration control structure having the configuration shown in the present embodiment, the vibration damping structure did not increase even in the upper floors, and was close to the seismic isolation structure. ..

FIG. 9 shows the results of simulating the maximum response vertical acceleration in the roof body of the roof frame in the stand portion as described above. Further, FIG. 10 shows the result of simulating the maximum response bending moment in the roof body of the roof frame in the stand portion as described above.
As shown in FIG. 9, in the vibration damping structure having the configuration shown in the present embodiment, the maximum response acceleration in the vertical direction of the roof body 32 is smaller than that of the seismic structure at the tip portion 32s, resulting in a seismic isolation structure. It is close to the level.
Further, as shown in FIG. 10, in the vibration damping structure having the configuration shown in the present embodiment, the maximum response bending moment generated at the base end portion 32b of the roof body 32 is smaller than that of the seismic isolation structure, and the seismic isolation structure is provided. It is a level close to.

According to the building structure 1 having the roof frame 30 as described above, the plurality of lower floor columns 11 constructed on the foundation 6 and the lower floor beams erected between the lower floor columns 11 adjacent to each other. The lower structure portion 10 of the ramen structure composed of 12 and the base end portion 32b provided above the lower structure portion 10 are fixed ends, and the tip end portion 32s extends laterally from the base end portion 32b to be a free end. The upper structure portion 20 having a cantilever-shaped roof frame 30 is provided, and the lower structure portion 10 has a flexible structure having a lower rigidity than the upper structure portion 20.
According to such a configuration, the lower structure portion 10 has a flexible structure composed of a rigid frame frame with respect to the upper structure portion 20 having the roof frame 30, so that the building structure 1 having the roof frame 30 has a so-called structure. A soft story damping structure can be introduced. As a result, when an earthquake occurs, the deformation can be concentrated on the lower structure portion 10 to absorb the earthquake energy. Therefore, the deformation of the superstructure portion 20 having the roof frame 30 can be suppressed, the deformation of the roof frame 30 can be suppressed, and the vertical swing of the tip portion 32s can be suppressed. Moreover, since it is not necessary to provide a seismic isolation layer having a seismic isolation device, there is no need for a construction period or space for providing the seismic isolation layer. As a result, it is possible to effectively suppress the shaking of the roof frame 30 overhanging in the shape of a cantilever, suppress the lengthening of construction, and make effective use of space.

Further, the upper structure portion 20 has an upper floor portion 40 provided on the lower structure portion 10 and a roof frame 30 provided on the upper floor portion 40, and the upper floor portion 40 extends in the vertical direction. A column-beam frame 43 composed of an upper-layer column 41 and an upper-layer beam 42 extending in the horizontal direction, and oblique beams 51B and 51C provided so as to extend diagonally with respect to the horizontal plane and supported by the column-beam frame 43. A reinforcing brace 45 provided on the beam frame 43 is provided.
According to such a configuration, in the superstructure portion 20, the superstructure portion 20 that supports the roof frame 30 is reinforced by the inclined beams 51B and 51C and the reinforcing brace 45, and the superstructure portion 10 of the flexible structure is reinforced. The superstructure portion 20 can have a more rigid structure. As a result, the effect of the soft story vibration damping structure, which suppresses the deformation of the upper structure portion 20 having the roof frame 30, by concentrating the deformation on the lower structure portion 10 of the flexible structure and absorbing the seismic energy, is more remarkable. Can be demonstrated.

Further, the superstructure portion 40 is reinforced in the radial direction by the radial reinforcing brace 45R and the inclined beams 51B and 51C, and is reinforced in the circumferential direction by the circumferential reinforcing brace 45S. In this way, the rigidity can be increased in a well-balanced manner in the radial direction and the circumferential direction, and the superstructure portion 40 can be made into a rigid structure.

Further, the lower structure portion 10 includes a damper portion 16 that attenuates the relative displacement of the lower floor beams 12 located above and below each other in the horizontal direction.
According to such a configuration, the deformation generated concentrated on the lower structure portion 10 of the flexible structure is damped by the damper portion 16, so that the deformation and shaking of the upper structure portion 20 having the roof frame 30 can be more reliably performed. It can be suppressed.

Further, the roof frame 30 has an opening 34 in the central portion when viewed in a plan view, and is provided in an annular shape continuous in the circumferential direction on the outer peripheral side of the opening 34. The damper portions 16 are provided at a plurality of locations in the circumferential direction, and are located in the vertical plane including the radial direction and the radial damper portions 16R located in the vertical plane including the radial direction outward from the opening 34. It is provided with a circumferential damper portion 16S.
According to such a configuration, in the roof frame 30 which is continuous in an annular shape when viewed in a plan view, the radial damper portion 16R and the circumferential damper portion 16S are dispersedly provided at a plurality of locations in the circumferential direction in all directions. Deformation of the lower structure portion 10 due to the vibration component can be effectively suppressed.

Further, the damper portion 16 is provided in each layer of the lower structure portion 10. As a result, even if the damper portion 16 of any of the layers does not function, the deformation of the lower structure portion 10 can be effectively suppressed by exerting a predetermined damping function in the damper portion 16 of the other layer. ..

In addition, in the lower structure portion 10, one end of the lower floor beam 12S located on the outer peripheral side away from the field 2 is rotatably and displaceably connected to the lower floor column 11S via the pin 12P. .. As a result, the lower structure portion 10 can be made into a flexible structure that is more easily deformed. Therefore, the effect of the soft story vibration damping structure, which suppresses the deformation of the upper structure portion 20 having the roof frame 30, by concentrating the deformation on the lower structure portion 10 of the flexible structure and absorbing the seismic energy, becomes more remarkable. Can be demonstrated.

Further, the lower structure portion 10 is composed of a plurality of layers.
According to such a configuration, the lower structure portion 10 can more easily realize a flexible structure having a lower rigidity than the upper structure portion 40, and the effect of the soft story damping structure can be more remarkably exhibited. it can.

Further, by forming the lower floor pillar 11 with a high-strength material, the cross-sectional area of the lower floor pillar 11 can be reduced, and the strength can be secured while improving the deformation performance of the lower floor pillar 11 at the time of an earthquake.

(Modified example of the embodiment)
The building structure having the roof frame of the present invention is not limited to the above-described embodiment described with reference to the drawings, and various modifications can be considered within the technical scope thereof.
For example, in the above-described embodiment, the configuration of the entire building structure 1 has been described, but this is merely an example, and the configuration of each part can be changed as appropriate. For example, in the above embodiment, the lower structure portion 10 is composed of a plurality of layers, but may be composed of one layer.
Further, although layout examples of the damper portion 16 and the reinforcing brace 45 are shown in FIGS. 4 and 5, needless to say, the layout can be changed as appropriate.
In addition to this, as long as the gist of the present invention is not deviated, the configuration described in the above embodiment can be selected or changed to another configuration as appropriate.

1 Building structure 32b Base end 6 Foundation 32s Tip 10 Lower structure 34 Opening 11, 11S Lower floor pillar (pillar) 40 Upper floor 12, 12S Lower floor beam (beam) 41, 41S Upper floor pillar 16 Damper part 42 Upper floor beam 16R Radiation direction damper part 43 Column beam frame 16S Circumferential damper part 45 Reinforcement brace 20 Upper structure part 45R Radiation direction reinforcement brace 30 Roof frame 45S Circumferential reinforcement brace 32 Roof body 51B, 51C Oblique beam

Claims (3)

A rigid frame structure substructure consisting of multiple columns built on the foundation and beams erected between the columns adjacent to each other.
A superstructure having a cantilever-like roof frame provided above the lower structure, the base end of which is a fixed end, and the tip extending laterally from the base end to a free end. And with
The lower structure unit, Ri flexible structure der rigidity is lower than the upper structure portion,
The lower structure portion includes a damper portion that attenuates the relative displacement of the beams located above and below each other in the horizontal direction.
The roof frame has an opening in the central portion when viewed in a plan view, and is provided in an annular shape continuous in the circumferential direction on the outer peripheral side of the opening.
The damper portions are provided at a plurality of locations in the circumferential direction, and are located in the vertical plane including the radial direction from the opening and in the vertical plane including the radial direction. building structure having a roof Frame to the circumferential damper unit which, characterized that you have provided a. The upper structure portion has an upper floor portion provided on the lower structure portion and the roof frame provided on the upper floor portion.
The upper floors
A column-beam frame consisting of upper floor columns extending in the vertical direction and upper floor beams extending in the horizontal direction,
An oblique beam that extends diagonally with respect to the horizontal plane and is supported by the column-beam frame.
Reinforcing braces provided on the column-beam frame and
The building structure having the roof frame according to claim 1, wherein the building structure is provided with. The building structure having a roof frame according to claim 1 or 2 , wherein the substructure portion is composed of a plurality of layers.

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