Steel-framed building structure

Abstract

To provide a steel building frame that can be easily designed, for the steel building frame in which wood panels are installed in a steel frame.SOLUTION: There is provided a steel building frame 100 having a foundation 11 and a steel frame 10 erected on the foundation 11. An upper part of a wood panel 20 is attached to a steel beam 12 forming the steel frame 10 in an upward and downward movable manner, and a lower part of the wood panel 20 is attached to the foundation 11 in an upward and downward movable manner.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a steel frame building structure. [Background technology]

[0002] There are cases where a steel-frame building frame is applied in which a shear wall made of wood panels is arranged inside a steel frame. For example, Patent Document 1 proposes a CLT shear wall in which CLT panels are provided inside a steel frame. In this CLT shear wall, the steel frame and the CLT panels are joined with screws or bolts. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-1520 Summary of the Invention [Problem to be solved by the invention]

[0004] In steel-framed building structures in which wooden panels are arranged within a steel frame, such as the CLT shear wall described in Patent Document 1, both the steel columns and the wooden panels are structural elements that bear the vertical load, which is the building load above the steel beams, making it difficult to set and evaluate the proportion of vertical load that they bear, and therefore designing steel-framed building structures is not easy.

[0005] Furthermore, due to the difference in hysteresis characteristics between the steel frame and the wooden panels, it is difficult to set and evaluate the structural characteristic coefficient (Ds value) at the time of design, which also makes the design of steel frame building frames difficult.For example, if the steel frame is a rigid frame, the hysteresis characteristics of the frame (panel zone) will be spindle-type, while the hysteresis characteristics of the wooden panel load-bearing walls will be slip-type.It is easy to understand that it is difficult to set the Ds value of a story when structural elements with different hysteresis characteristics exist within that story.

[0006] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a steel-framed building frame in which wooden panels are arranged within a steel frame structure, which can be easily designed. [Means for solving the problem]

[0007] In order to achieve the above object, one aspect of the steel frame building structure according to the present invention is as follows: A steel-framed building structure having a foundation and a steel frame erected on the foundation, The upper part of the wooden panel is attached to the steel beams that form the steel frame so that it can move up and down freely, The lower part of the wooden panel is attached to the foundation so as to be freely movable up and down.

[0008] According to this aspect, the upper and lower portions of the wooden panels are attached so that they can move up and down relative to the steel beams and the foundation, respectively. This means that the wooden panels no longer bear the building load (vertical load) above the steel beams, and only the steel frame bears the vertical load, making it easier to design a steel-frame building frame. Furthermore, because the lower portions of the wooden panels are attached so that they can move up and down relative to the foundation, it is possible to align the hysteresis loop characteristics of both the steel frame and the wooden panels, making it easier to set the structural characteristic coefficients of each story, which also simplifies the design of a steel-frame building frame. Furthermore, because the wooden panels are attached so that they can move up and down relative to the steel frame, even if the height of the steel frame (the height between floors) deviates slightly from the design value, the deviation can be absorbed and the wooden panels can be incorporated into the steel frame.

[0009] Here, steel frames include rigid frame frames and braced frames. Rigid frame frames are a structural type with high ductility and have spindle-type hysteresis characteristics, which effectively absorb earthquake energy by generating plastic hinges at the ends of steel beams and columns. On the other hand, braced frames are a structural type with low ductility and high rigidity, and have slip-type hysteresis characteristics.

[0010] In addition, wood panels can be made from structural plywood, laminated timber (material made by fastening multiple pieces of lumber together with adhesives or screws), CLT (Cross Laminated Timber) panels, etc.

[0011] As mentioned above, shear walls made of wood panels generally have slip-type hysteresis loops. However, because they are attached to steel frames so that they can move up and down freely, when they are incorporated into rigid frame structures, they can exhibit spindle-type hysteresis loops similar to rigid frame structures. On the other hand, when they are incorporated into braced frames, they can exhibit slip-type hysteresis loops similar to braced frames. More specifically, the hysteresis loop of a wood panel can be changed by the connection configuration between the wood panel and the foundation. That is, if the connectors connecting the wood panel to the foundation have the deformation capacity to withstand both compressive and tensile forces, the wood panel can be given a spindle-type hysteresis loop. On the other hand, if the connectors have the deformation capacity to withstand only tensile forces, the wood panel can be given a slip-type hysteresis loop. Therefore, by connecting the wood panel to the foundation so that the hysteresis loops are similar depending on the structural type of the steel frame, it is easy to set the structural characteristic coefficients of each story.

[0012] In another aspect of the steel frame building structure according to the present invention, The upper part of the wood panel is attached to the shear support metal fittings attached to the steel beams so that it can move up and down freely, The shear support bracket has a plate-like member, and the plate-like member has a loose hole extending vertically. The upper end of the wood panel is provided with a receiving groove in which at least a part of the shear receiving hardware is received, The present invention is characterized in that a shaft-shaped fixing member that passes through the wood panel is loosely fitted into the loose hole of the plate-shaped member accommodated in the accommodation groove.

[0013] According to this aspect, the shear support hardware connecting the steel beam and the upper part of the wooden panel comprises a plate-shaped member with a loose hole extending vertically, the plate-shaped member is accommodated in an accommodation groove provided at the upper end of the wooden panel, and an axial fixing member that passes through the wooden panel is loosely fitted into the loose hole, so that the wooden panel can be freely moved up and down relative to the steel beam and stably fixed.

[0014] In another aspect of the steel frame building structure according to the present invention, The upper part of the wood panel is attached to the shear support metal fittings attached to the steel beams so that it can move up and down freely, The shear bracket comprises a shaft-shaped member; The upper end of the wood panel is provided with a receiving groove in which at least a part of the shear receiving hardware is received, The shaft-shaped member is accommodated in the accommodation groove so as to be movable up and down.

[0015] According to this aspect, the shear support hardware connecting the steel beam and the upper part of the wood panel is equipped with an axial member, and the axial member is accommodated in a storage groove provided at the upper end of the wood panel so that it can move freely up and down, allowing the wood panel to be moved freely up and down and stably fixed to the steel beam.

[0016] In another aspect of the steel frame building structure according to the present invention, A metal joint is embedded in the lower end of the wood panel, The connecting fitting is a steel pipe having a first hollow portion therein and a first thread groove at one end of the first hollow portion; a steel shaft member including a steel core material and a first screw and a second screw located at both ends of the core material and having a larger diameter than the core material; a steel cotter having a second hollow portion therein and a second thread groove; A portion of the pipe is accommodated in the second hollow portion, the shaft member is accommodated in the second hollow portion and the first hollow portion, the first screw groove and the first screw are fixed, and the second screw groove and the second screw are fixed, When either a tensile load or a compressive load is applied, the metal fitting is designed to bear the tensile load or the compressive load, The cotter is fixed directly or indirectly to the foundation.

[0017] According to this aspect, the metal connector that directly or indirectly fastens the bottom end of the wood panel to the foundation has both tensile and compressive properties, making it possible to incorporate a wood panel with spindle-shaped hysteresis loops into a rigid-frame steel frame. Here, "the cotter is directly or indirectly fixed to the foundation" includes both a configuration in which the cotter that constitutes the metal connector is directly fixed to the foundation and a configuration in which the cotter is fixed to a fixture or the like that is fixed to the foundation (indirectly fixed to the foundation).

[0018] In another aspect of the steel frame building structure according to the present invention, Axial metal fittings are embedded on the left and right sides of the lower end of the wooden panel, When a tensile load is applied, either the left or right metal fitting is designed to bear the tensile load, The metal connector is fixed directly or indirectly to the foundation.

[0019] According to this aspect, the connecting fittings that directly or indirectly fix the lower end of the wood panel to the foundation have only tensile performance, making it possible to incorporate wood panels with slip-type hysteresis characteristics into a steel frame structure, which is a braced frame structure.

[0020] Since the direction of the horizontal force acting on a steel frame during an earthquake changes from left to right, in this embodiment, by fixing the left and right sides of the lower end of the wood panel to the foundation with shaft-shaped metal fittings, a tensile force acts on the metal fitting on the tension side depending on the direction of the horizontal force, causing the metal fitting to displace, allowing the wood panel to move up and down (including diagonally).Here, two metal fittings may be provided on each side, or a metal fitting may be provided in the center in addition to the left and right positions of the lower end of the wood panel.

[0021] In another aspect of the steel frame building structure according to the present invention, The wood panel has a rectangular front view shape, The wooden panel is attached to the shear support at the center of the rectangular upper piece so that it can move up and down freely.

[0022] According to this embodiment, the shear support hardware is attached to the center of the upper rectangular piece of the wooden panel when viewed from the front, so that the shear support hardware can withstand the shear force without being affected by displacement at the corners of the wooden panel or their vicinity when the steel frame or wooden panel deforms during an earthquake.

[0023] Another aspect of the steel frame building structure according to the present invention is as follows: The wood panel is characterized in that it is a CLT panel.

[0024] According to this embodiment, since the wood panel is a CLT panel, a wide range of panels can be applied, for example, up to 12m x 2.6m in length and width, making it possible to form load-bearing walls of various sizes. [Effects of the Invention]

[0025] As can be understood from the above explanation, the steel frame building frame of the present invention makes it possible to easily design a steel frame building frame in which wood panels are arranged within a steel frame structure. [Brief explanation of the drawings]

[0026] [Figure 1] FIG. 1 is a front view showing an example of a steel-framed building frame according to a first embodiment. [Figure 2] FIG. 1 is an exploded perspective view illustrating an example of a shear support bracket and the mounting structure for the upper end of a wood panel. [Figure 3] FIG. 10 is an exploded perspective view illustrating the mounting structure of another example of a shear support bracket and the upper end of a wood panel. [Figure 4] FIG. 2 is a vertical cross-sectional view showing an example of a metal joint embedded below a wooden panel and indirectly fixed to the foundation in the steel-framed building frame according to the first embodiment. [Figure 5] FIG. 5 is a vertical cross-sectional view showing a state in which a compressive force is acting on the metal joint shown in FIG. 4. [Figure 6] FIG. 5 is a vertical cross-sectional view showing a state in which a tensile force is acting on the metal joint shown in FIG. 4. [Figure 7] FIG. 10 is a front view showing an example of a steel-framed building frame according to a second embodiment. [Figure 8] FIG. 10 is a vertical cross-sectional view showing an example of a joint metal fitting embedded below a wooden panel and indirectly fixed to the foundation in a steel-framed building frame according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0027] Hereinafter, an example of a steel-framed building frame according to each embodiment will be described with reference to the accompanying drawings. Note that in this specification and the drawings, substantially identical components may be designated by the same reference numerals to avoid redundant explanation.

[0028] [Steel-framed building structure according to the first embodiment] First, an example of a steel-framed building frame according to the first embodiment will be described with reference to Figs. 1 to 6. Fig. 1 is a front view showing an example of a steel-framed building frame according to the first embodiment. Figs. 2 and 3 are both exploded perspective views illustrating the attachment structure of an example of a shear-retaining metal fitting and the upper end of a wooden panel. Fig. 4 is a vertical cross-sectional view showing a state in which an example of a metal fitting is embedded below a wooden panel and indirectly fixed to the foundation in the steel-framed building frame according to the first embodiment, and Figs. 5 and 6 are vertical cross-sectional views showing states in which a compressive force and a tensile force are acting on the metal fitting shown in Fig. 4.

[0029] The steel-framed building frame 100 has a reinforced concrete foundation 11 and a steel frame 10 erected on the foundation 11. The steel frame 10 has steel beams 12 formed from H-shaped steel and a plurality of steel columns (not shown) that support the steel beams 12. The steel columns are formed from square steel pipes, H-shaped steel, or the like. Here, the steel frame 10 shown in FIG. 1 is assumed to be a rigid frame in which the joints between the steel beams 12 and the steel columns are rigidly connected.

[0030] The steel-frame building structure 100 includes a wooden panel 20 that is rectangular in front view inside the steel frame 10. The wooden panel 20 can be made of structural plywood, laminated lumber, or CLT panels, but CLT panels are preferred because they can be used in a wide range of panels with dimensions up to 12m x 2.6m.

[0031] The upper part of the wooden panel 20 is attached to the steel beam 12 so as to be freely movable up and down, and the lower part of the wooden panel 20 is attached to the foundation 11 so as to be freely movable up and down.

[0032] First, the connection between the upper part of the wooden panel 20 and the steel beam 12 will be described.

[0033] As shown in Figure 1, a shear support bracket 30 is attached to the lower flange 12a of the steel beam 12 with bolts 35. The shear support bracket 30 is a member that connects the steel beam 12 and the wooden panel 20, and bears the shear force S that occurs when a horizontal force F during an earthquake acts on the steel frame 10 and displaces the steel frame 10.

[0034] 2, the shear support bracket 30 has a steel mounting plate 32 that is rectangular in plan view and connected to the flange 12a of the steel beam 12, and a steel plate-like member 31 that is welded perpendicular to the mounting plate 32 at the center of the underside of the mounting plate 32. The plate-like member 31 has two loose holes 33 that are long in the vertical direction.

[0035] Bolts 35 are inserted into bolt holes (not shown) in the flanges 12a of the steel beams 12 through bolt holes 32a opened in the mounting plate 32, and are then tightened with nuts.

[0036] A storage groove 25 is provided at the upper end 21 of the wood panel 20, and a portion of the plate-shaped member 31 is stored in the storage groove 25 in the X1 direction. More specifically, the loose hole 33 of the plate-shaped member 31 is completely stored in the storage groove 25, and a portion of the upper part of the loose hole 33 is exposed above the storage groove 25, so that the plate-shaped member 31 is stored in the storage groove 25.

[0037] Two pin holes 28 that communicate with the two loose holes 33 are opened on the side surface of the plate-shaped member 31 at positions that correspond to the two loose holes 33 when a part of the plate-shaped member 31 is accommodated in the accommodation groove 25. Here, the number of loose holes 33 may be one, or may be, for example, three or more.

[0038] After a portion of the plate-shaped member 31 is accommodated in the accommodation groove 25, a drift pin 40 (an example of an axial fixing member) is inserted into each pin hole 28 in the X2 direction, passes through the loose hole 33, and is inserted into the other pin hole 28 and then driven in, thereby fixing the plate-shaped member 31 to the wood panel 20 so that it can move freely up and down.

[0039] That is, as shown in FIG. 1, the wood panel 20 is attached to the shear support 30 that is bolted to the steel beam 12 so that it can move freely in the Y1 direction, which is the up-down direction.

[0040] In the illustrated example, the shear support bracket 30 is installed at the center (center of width t0) of the rectangular upper piece of the wooden panel 20. By attaching the shear support bracket 30 to the center of the upper piece of the wooden panel 20 in this way, the shear support bracket 30 is not affected by displacement at the corners of the wooden panel 20 or in their vicinity when the steel frame 10 or the wooden panel 20 deforms during an earthquake, and can withstand the shear force S.

[0041] Another form of shear support is shown in Figure 3. The illustrated shear support 30A differs from the shear support 30 in that, instead of the plate-like member 31, a round steel bar 34 (an example of a shaft-like member) is welded to the mounting plate 32 having bolt holes 32a.

[0042] A cylindrical storage groove 26 for storing a round steel bar 34 is provided at the upper end 21 of the wood panel 20, and the round steel bar 34 is stored in the storage groove 26 in the X3 direction.

[0043] With the round steel bars 34 accommodated in the accommodation grooves 26, the shear support hardware 30A is bolted to the steel beam 12, allowing the wood panel 20 to be attached to the steel beam 12 so that it can move freely up and down.

[0044] 2 or 3, the upper part of the wooden panel 20 can be attached to the steel beam 12 so that it can move up and down freely, and as shown in Fig. 1, the wooden panel 20 does not bear the vertical load W, which is the building load above the steel beam 12. As a result, only the steel frame 10 bears the vertical load W, making it possible to easily design the steel-frame building frame 100.

[0045] Furthermore, since the wooden panels 20 are attached to the steel frame 10 so that they can move up and down freely, even if the height of the steel frame 10 (height between floors) deviates slightly from the design value, the deviation can be absorbed and the wooden panels 20 can be incorporated into the steel frame 10.

[0046] Next, the connection between the lower part of the wood panel 20 and the foundation 11 will be described.

[0047] As shown in Figure 1, a fixing jig 60 made of channel steel or the like is fixed to the upper end of the foundation 11 via anchor bolts 15, and a metal connector 50 is fixed to the fixing jig 60, with a portion of the metal connector 50 embedded inside the wood panel 20 from the lower end 22. In other words, the lower part of the wood panel 20 is indirectly fixed to the foundation 11 via the fixing jig 60. However, the metal connector 50 may also be fixed directly to the foundation 11.

[0048] As shown in FIG. 4, the metal connector 50 includes a steel pipe 51, a steel cotter 53, and a steel shaft member 55.

[0049] The pipe 51 has a first hollow portion 51a inside, a first screw groove 51b at one end of the first hollow portion 51a, and a threaded circumferential surface 51c. The steel pipe 51 is a pipe plug screw bolt (pipe LSB) with threads on the circumferential surface 51c. The pipe 51 is fixed by screwing the circumferential surface 51c into the wood panel 20. Although not shown, a pipe without threads on its circumferential surface may be placed in a groove provided in the wood panel, and the wall of the groove and the circumferential surface of the pipe may be fixed with an adhesive.

[0050] The cotter 53 has a second hollow portion 53a inside and a second screw groove 53b at its end. Part of the cotter 53 is screwed into the lower end of the wood panel 20, and both components are arranged inside the wood panel 20 so that part of the pipe 51 is housed in the second hollow portion 53a. The lower end of the cotter 53 is placed on the upper end of the fixing jig 60.

[0051] Above the cotter 53 inside the wood panel 20, a deformation substitute gap 29 having a height dimension t1 is provided.

[0052] The shaft member 55 has a steel core material 55a, and a first screw 55b and a second screw 55c that are located on both ends of the core material 55a and have a larger diameter than the core material 55a. The shaft member 55, which has the first screw 55b and the second screw 55c on both ends and the relatively smaller diameter core material 55a in the center, is formed by, for example, rolling.

[0053] Since the core material 55a has a relatively smaller diameter than the first threads 55b and the second threads 55c at both ends, a gap G is formed between the core material 55a and the first hollow portion 51a of the pipe 51. This gap G is a gap for buckling deformation, which will be described in detail below.

[0054] An axial member 55 is arranged in the first hollow portion 51a and the second hollow portion 53a, and a first screw 55b is threaded into the first screw groove 51b, and a second screw 55c is threaded into the second screw groove 53b, thereby fixing both ends of the axial member 55 to the pipe 51 and the cotter 53.

[0055] The second screw 55c is threaded into the second screw groove 53b, passes through the second screw groove 53b, and is threaded into the screw groove 60a of the fixing jig 60. The head of the anchor bolt 15 fixed to the foundation 11 is threaded into another screw groove 60b of the fixing jig 60, and the shaft member 55 of the connecting fitting 50 is joined to the fixing jig 60 fixed to the foundation 11.

[0056] As shown in Figure 1, the horizontal force F acting during an earthquake displaces the steel frame 10 and the wooden panel 20 left and right, and as a result of the left and right displacement of the wooden panel 20, a compressive force N1 and a tensile force N2 act alternately on the connecting fittings 50 on the left and right below the wooden panel 20.

[0057] As shown in Fig. 5, when a compressive force N1 acts on the wooden panel 20 and the joining fitting 50, the wooden panel 20 is pushed downward in the Y2 direction, the height dimension of the deformation substitute gap 29 also becomes smaller as t2 (< t1), and the lower end of the wooden panel 20 also approaches the fixing jig 60.

[0058] Furthermore, when the acting compressive force N1 is greater than the buckling resistance of the core material 55a, the core material 55a buckles and deforms in the gap G of the first hollow portion 51a of the pipe 51 and abuts against the wall surface of the first hollow portion 51a, and further deformation is restricted.

[0059] Thus, when a compressive force N1 acts on the wooden panel 20 and the joining fitting 50 during an earthquake, the core material 55a of the shaft member 55 constituting the joining fitting 50 buckles and deforms, so that the strain energy during an earthquake can be effectively absorbed. At this time, in the shaft member 55, the first screw 55b and the second screw 55c having a larger diameter than the central core material 55a are fixed to the pipe 51 and the cotter 53 at both ends of the core material 55a, respectively, so that the first screw 55b and the second screw 55c do not fail first with respect to the acting compressive force N1, and the core material 55a will buckle and deform.

[0060] Also, when the core material 55a buckles and deforms, there are the pipe 51 and the cotter 53 on the outer periphery of the core material 55a, and there is the wooden panel 20 on the outer periphery of the pipe 51 and the cotter 53. Therefore, although the core material 55a buckles and deforms in the first hollow portion 51a of the pipe 51 and the second hollow portion 53a of the cotter 53, it will be restrained by the pipe 51, the cotter 53, and the wooden panel 20, and the buckling failure of the core material 55a is suppressed.

[0061] On the other hand, as shown in Fig. 6, when a tensile force N2 acts on the wooden panel 20 and the joining fitting 50, the wooden panel 20 is pulled upward in the Y3 direction, the height dimension of the deformation substitute gap 29 becomes larger as t3 (> t1), and the lower end 22 of the wooden panel 20 also moves away from the fixing jig 60.

[0062] Furthermore, when the applied tensile force N2 is greater than the tensile strength of the core material 55a, the core material 55a deforms in the tensile direction, thereby absorbing strain energy during an earthquake.

[0063] In this way, by connecting the lower part of the wood panel 20 to the foundation 11 via a joint fitting 50 that exhibits deformation performance on both the tensile and compressive sides, the lower part of the wood panel 20 can be attached so that it can move freely up and down relative to the foundation 11.

[0064] By applying a metal connector 50 that exhibits deformation performance in both tension and compression, it is possible to incorporate a wood panel 20 with a spindle-shaped hysteresis loop into a rigid frame steel frame 10 that also has a spindle-shaped hysteresis loop. This allows the hysteresis loop of the entire story to be a spindle-shaped hysteresis loop, making it easy to set the structural characteristic coefficient of each story.

[0065] [Steel-framed building structure according to the second embodiment] Next, an example of a steel-framed building frame according to a second embodiment will be described with reference to Fig. 7 and Fig. 8. Here, Fig. 7 is a front view showing an example of a steel-framed building frame according to the second embodiment. Also, Fig. 8 is a vertical cross-sectional view showing an example of a metal joint buried below a wooden panel and indirectly fixed to a foundation in the steel-framed building frame according to the second embodiment.

[0066] The steel-framed building frame 100A differs from the steel-framed building frame 100 in that it has a connector 70 with a simple configuration instead of the connector 50.

[0067] The steel frame 10 shown in FIG. 7 is a braced frame in which the steel beams 12 and the steel columns (not shown) are connected by pins, and braces (not shown) are provided inside the frame.

[0068] As shown in Figure 8, the connector 70 is a shaft-shaped metal fitting and includes a first threaded portion 71 that is screwed into the wood panel 20, a deformed portion 72 (non-threaded portion) that does not have a thread groove and is not fixed to the wood panel 20, and a second threaded portion 73 that is screwed into the thread groove 60a of the fixing jig 60. The length t4 of the first threaded portion 71 is set to, for example, approximately 400 mm to 450 mm, and the length t5 of the deformed portion 72 is set to, for example, approximately 100 mm to 150 mm. Therefore, the embedding length t6 of the connector 70 into the wood panel 20 is set to, for example, approximately 500 mm to 600 mm (e.g., 550 mm). The connector 70 is formed, for example, by a lag screw bolt. Note that in addition to the illustrated example, a fully threaded lag screw bolt may also be used as the connector.

[0069] Unlike the connector 50 shown in Fig. 4, the shaft-shaped connector 70 only bears tension force. Therefore, as shown in Fig. 7, when the steel frame 10 and the wooden panel 20 are displaced alternately left and right due to horizontal force F acting during an earthquake, the connector 70 on the tension side bears the tension force N2, while the connector 70 on the compression side does not bear the compression force N1.

[0070] As shown in Figure 8, when the tensile force N2 acting on the connector 70 is greater than the tensile strength of the connector 70, the connector 70 deforms in the Y4 direction toward the tension side, absorbing strain energy during an earthquake. In this case, as described above, the connector 70 has a deforming section 72 of approximately 100 to 150 mm, which can be expected to deform by approximately 30 mm. Furthermore, because the first screw section 71, which is approximately 400 to 450 mm long, is screwed into the wood panel 20, the connector 70 and the wood panel 20 can be kept sufficiently fixed together even when the connector 70 (deforming section 72) is deformed.

[0071] In this way, the metal connector 70 connecting the bottom end 22 of the wooden panel 20 to the foundation 11 only bears the applied tensile load, making it possible to incorporate the wooden panel 20, which also has slip-type hysteresis characteristics, into the steel frame 10, which is a braced frame with slip-type hysteresis characteristics. This allows the hysteresis characteristics of the entire story to be slip-type hysteresis characteristics, making it easy to set the structural characteristic coefficient of the story.

[0072] As explained above, by applying connectors 50, 70 with similar hysteresis characteristics depending on the structural type of the steel frame (frame frame or braced frame), the structural characteristic coefficients of each story can be easily set, making it possible to easily design steel frame buildings.

[0073] It should be noted that the present invention is not limited to the configurations shown here, and other embodiments may be possible in which other components are combined with the configurations described in the above embodiments. In this regard, the present invention can be modified within the scope of the present invention, and can be appropriately determined depending on the application form. [Explanation of symbols]

[0074] 10: Steel frame 11: Basics 12: Steel beam 15: Anchor bolt 20: Wood panel 21:Top edge 22: Bottom edge 25, 26: Storage groove 28: Pinhole 29: Deformed substitute gap 30, 30A: Shear support hardware 31: Plate-shaped member 32: Mounting plate 32a: Bolt hole 33: Loose hole 34: Shaft-shaped member 40: Drift pin 50: Joint fittings 51: Pipe 51a: 1st hollow part 51b: First screw groove 51c: Peripheral surface 53: Cotter 53a: 2nd hollow part 53b: Second screw groove 55: Shaft member 55a: Core material 55b: First screw 55c: Second screw 60: Fixture 60a, 60b: Thread groove 70: Joint fittings 71: First screw part 72: Deformed part (non-threaded part) 73: Second screw part 100, 100A: Steel frame building structure F: Horizontal force S: Shear force W: Vertical load N1: Compression force N2: Tensile force

Claims

1. A steel-framed building structure having a foundation and a steel frame erected on the foundation, The upper part of the wooden panel is attached to the steel beams that form the steel frame so that it can move up and down freely, The lower part of the wood panel is attached to the foundation so as to be freely movable up and down, A metal joint is embedded in the lower end of the wood panel, The connecting fitting is a steel pipe having a first hollow portion therein and a first thread groove at one end of the first hollow portion; a steel shaft member including a steel core material and a first screw and a second screw located at both ends of the core material and having a diameter larger than that of the core material; a steel cotter having a second hollow portion therein and a second thread groove; a portion of the pipe is accommodated in the second hollow portion, the shaft member is accommodated in the second hollow portion and the first hollow portion, the first screw groove and the first screw are fixed, and the second screw groove and the second screw are fixed, When either a tensile load or a compressive load is applied, the metal fitting is designed to bear the tensile load or the compressive load, A steel-framed building structure, characterized in that the cotter is fixed directly or indirectly to the foundation.

2. The upper part of the wood panel is attached to the shear support metal fittings attached to the steel beams so that it can move up and down freely, The shear support bracket has a plate-like member, and the plate-like member has a loose hole extending vertically. The upper end of the wood panel is provided with a receiving groove in which at least a part of the shear receiving hardware is received, The steel-framed building structure described in claim 1, characterized in that an axial fixing member that penetrates the wood panel is loosely fitted into the loose hole of the plate-shaped member accommodated in the accommodation groove.

3. The upper part of the wood panel is attached to the shear support metal fittings attached to the steel beams so that it can move up and down freely, The shear bracket comprises a shaft-shaped member; The upper end of the wood panel is provided with a receiving groove in which at least a part of the shear receiving hardware is received, 2. The steel-framed building structure according to claim 1, wherein the shaft-shaped member is accommodated in the accommodation groove so as to be movable up and down.

4. The wood panel has a rectangular front view shape, 4. The steel-framed building structure according to claim 2 or 3, characterized in that the wooden panel is attached to the shear support metal bracket at the center position of the rectangular upper piece so as to be freely movable up and down.

5. The steel frame building structure according to any one of claims 1 to 4, characterized in that the wood panels are CLT panels.

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