Vibration control frame

Abstract

To effectively exhibit a vibration control effect by a vibration control device while making the vibration control device inconspicuous in a vibration control frame in which the vibration control device is incorporated and which causes torsional vibration when seismic force is input.SOLUTION: A seismic control frame 1 is constituted of a frame body 2 having a plane shape having a distinction between a long side direction and a short side direction and a column / beam frame, and a core structure 3 which is arranged near one side in the short side direction of the frame body 2, has a rigidly connected column / beam frame, and has relatively higher rigidity than rigidity of the frame body 2, and a rigid center position on a plane of the whole frame including the frame body 2 and the core structure 3 is positioned closer to the core structure 3 in the short side direction than a center of gravity position on the plane of the whole frame. A vibration control device 5 for generating damping force or the like according to the vibration of the frame body 2 is erected on both gable surfaces of the frame body 2 or a part in the short side direction near both gable surfaces.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a vibration-damping frame that effectively exerts the vibration-damping effect of a vibration-damping device (damper) incorporated in the frame while making the device less noticeable. [Background technology]

[0002] When planning the floor plan of a structure, if a core that aggregates two-way earthquake-resistant elements is placed in any area on the plane, the placement of the core and surrounding frame is often determined so that the eccentric distance between the center of gravity and the center of rigidity is kept as small as possible to prevent twisting when the structure vibrates.

[0003] On the other hand, there is a method in which a relatively low-rigidity frame (flexible surface) is combined with a high-rigidity frame (rigid surface) and a damper is incorporated into the flexible surface, causing large inter-story displacements in the flexible surface due to the torsional vibration of the building, thereby actively expecting the energy absorption effect of the damper (see Patent Document 1).

[0004] In this method, flexible and rigid structural surfaces are combined to form parallel structural surfaces, and some of the column-beam joints that make up the structural surface that should be the flexible surface are made to be pin or semi-rigid joints, allowing the structural surface to behave as a flexible surface (Figures 3 and 5).However, because the entire building is made up of a rigid frame, there is a problem in that if all the joints in the flexible surface were made to be pin or semi-rigid joints, the building would no longer be able to function as a structural surface.

[0005] In response to this, the applicant has proposed a seismic control frame with a highly effective damping effect, which combines a core structure with earthquake-resistant elements in two horizontal directions with a peripheral structure incorporating a damper, but does not align the center of gravity and center of rigidity on the plane, thereby freeing all joints of the peripheral structure from rigid connections and freeing the peripheral structure from bearing horizontal forces (see Patent Document 2). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2002-227449 A (Claim 1, paragraphs 0013 to 0021, Figures 1 to 7) [Patent Document 2] Patent No. 5750000 (Claim 1, paragraphs 0013-0042, Figures 1-7) Summary of the Invention [Problem to be solved by the invention]

[0007] However, in Patent Document 2, because the damper-equipped braces are erected within the perimeter structure, the inclined dampers are exposed on at least two elevations (structural faces) of the building, which has been pointed out as a drawback in that the dampers affect the exterior design of the structure and also restrict the view from inside the structure.Furthermore, because the braces are visible on the building's elevations, it is difficult to join the braces to columns made of materials other than steel, which also tends to restrict the structural form.

[0008] In addition, in Patent Document 2, the purpose is to generate torsional vibrations in the structural surfaces of the outer peripheral frame facing in two directions (paragraphs 0029 to 0037), and therefore damper-equipped braces are erected on the structural surfaces facing in two directions, so the idea of ​​limiting the structural surfaces on which damper-equipped braces should be erected to only one of the two directions has not been considered.

[0009] In addition, because the structural surfaces on which the braces are erected are arranged in two horizontal directions perpendicular to the outer structure, there may be restrictions on how they can be combined with the core structure, and location and road access conditions may also be limited.

[0010] In light of the above background, the present invention proposes a seismic control frame that overcomes the limitations of Patent Document 2 and is capable of effectively exerting the seismic control effect of the seismic control device. [Means for solving the problem]

[0011] The vibration control structure described in claim 1 comprises a multi-layered frame structure having a planar shape with a distinction between a long side direction and a short side direction and having a column-beam frame structure, and a core structure which is arranged on one side or close to one side in the short side direction of the frame structure, has a column-beam frame rigidly connected thereto, has a rigidity relatively higher than the rigidity of the frame structure, and is connected to a horizontal member erected between the frame structure and the core structure, a position of a center of rigidity on a plane of the entire frame including the frame structure and the core structure is located closer to the core structure in the short side direction than a position of a center of gravity on a plane of the entire frame, A constituent requirement is that a vibration control device that generates resistance, damping force, or inertia force when inter-story deformation occurs due to (torsional) vibration of the frame is installed on both end faces of the frame, or in a part of the short side direction near both end faces, facing in the short side direction.

[0012] "A planar shape with a clear distinction between the long side direction and the short side direction" means that the planar shape of the entire frame, which combines the frame body 2 and the core structure 3, is a rectangle with a clear long side direction and a short side direction as shown in Figures 1 and 3, or a parallelogram or trapezoid that is a deformed rectangle as shown in Figures 8-(a) and 8-(b), or a planar shape that is similar to these. The "entire frame" in claim 1 refers to the entire seismic isolation frame 1.

[0013] "A frame structure having a column-beam framework" means that the frame structure 2 is basically composed of a column-beam framework (structural surface), and in some cases braces may be installed within the structural surfaces 21 and 22 that make up the frame structure 2. "Multi-layer" refers to at least three or more floors.

[0014] "The core structure is located on one side of the short side of the frame, or close to one side" means that when frame 2, which has structural surfaces 21 and 22 facing mainly in two horizontal directions, is viewed in plan, the entire core structure 3, or the center of core structure 3, is located on one side of the short side, or at the center on the plane of frame 2, or at a position closer to one side of the center of gravity in the short side direction. On a plane, core structure 3 is included in frame 2. The entire core structure 3 or its center only needs to be located closer to one side of the center on the plane of frame 2 in the short side direction, so it may also be closer to one side of the long side direction.

[0015] "A core structure having a framework of rigidly connected columns and beams" means that the structural faces 31 and 32 that make up the core structure 3 are rigid-frame structures in which the constituent columns and beams are rigidly connected. Braces may be installed within the structural faces 31 and 32 to ensure the necessary rigidity of the core structure 3.

[0016] The core structure 3 basically has structural faces 31 and 32 facing in two horizontal directions, and is placed on one side or the other in the direction of the short side of the frame 2, so has a planar shape that is long in the direction of the long side of the frame 2. The core structure 3 itself does not need to have a closed planar shape made up of the structural faces 31 and 32 in two directions, but as shown in Figures 1 and 2, the structural face 32 in the direction of the short side of the core structure 3 can be connected to the structural face 21 facing the direction of the long side of the frame 2, thereby forming the core structure 3 together with the structural face 21.

[0017] "A core structure with relatively higher rigidity than the rigidity of the frame" means that the horizontal rigidity of the core structure 3 alone is higher than the horizontal rigidity of the frame 2 that surrounds the core structure 3. In other words, this means that the core structure has such rigidity that the horizontal deformation of the core structure is smaller than the horizontal deformation of the frame 2 excluding the core structure 3 when the entire frame (seismic control frame 1) vibrates.

[0018] "A core structure is arranged to which horizontal members are connected to be erected between the frame structure" means that horizontal members 4 are erected in either direction between structural faces 21, 22 of frame structure 2 surrounding core structure 3 and structural faces 31, 32 of core structure 3. The "horizontal members" mentioned here mainly refer to floor slabs installed on each floor of the building.

[0019] The horizontal members 4 attempt to make the core structure 3 and frame 2 behave as a single unit when horizontal forces are input to the entire frame (seismic control frame 1), and when the entire frame attempts to produce torsional vibration, they function to make frame 2 follow the rotation of the entire frame. The horizontal members 4 are primarily required to transmit horizontal shear forces between the core structure 3 and frame 2, and in principle do not need to transmit bending moments, so the beams supporting the horizontal members 4 can basically be pin-connected or semi-rigidly connected.

[0020] Torsional vibration of the entire frame is more likely to be induced, for example, when the columns and beams that make up the structural face 21 in the long side direction of the frame structure 2 on more than half of the stories (floors) are pin-jointed or semi-rigidly joined. "Most of the stories" means more than half of the stories, but it also means that the columns and beams on some continuous stories or some discontinuous stories are pin-jointed or the like.

[0021] When a beam 6 is erected in the short side direction between the structural face (section) 21 in the long side direction on the side of the frame structure 2 that is farther away from the core structure 3 and the core structure 3, and the frame structure 2 and the core structure 3 are connected in the short side direction, both ends of the beam 6 can be joined with a pin joint or a semi-rigid joint (claim 2), which eliminates the need for rigid joints at both ends, making construction easier.

[0022] "The position of the center of rigidity on the plane of the entire frame including the frame structure and core structure is located closer to the core structure in the short side direction than the position of the center of gravity on the plane of the entire frame" means that the position of the center of rigidity on the plane of the entire frame (seismic control frame 1) combining frame structure 2 and core structure 3 is located closer to the core structure 3 in the short side direction than the position of the center of gravity on the plane.

[0023] Because the rigidity of the core structure 3 is relatively higher than that of the frame 2 and the center of rigidity is located closer to the core structure 3 than the center of gravity, when vibration occurs in the entire frame, for example, mainly in the long side direction, the entire frame will tend to rotate (torsional vibration) around the center of rigidity S closer to the core structure 3, as shown in Figure 2-(a). As a result, the structural face 21 in the long side direction of the frame 2 located opposite the core structure 3 will tend to displace (deform) more than the structural face 21 in the long side direction on the core structure 3 side.

[0024] As a result of the large displacement of the structural face 21 in the long side direction on the opposite side of the core structure 3, the structural faces 22, 22 in the short side direction of the frame 2 tend to undergo large displacement (deformation). In response to this, the amount of interlayer deformation occurring between both ends in the short side direction increases, and the amount of relative deformation occurring between both axial ends of the vibration control device (damper) 5 erected in the short side direction on a plane increases. The large amount of deformation occurring between both ends of the vibration control device 5 increases the vibration energy absorption effect of the vibration control device 5.

[0025] In more detail, when vibration occurs in the entire frame consisting of the frame body 2 and the core structure 3, the entire frame tends to vibrate in a torsional manner around the rigidity center S located closer to the core structure 3 than the center of gravity G, as shown in Figure 2-(a), causing the structural surface 21 in the long side direction farther from the rigidity center S to vibrate more than the structural surface 21 in the long side direction closer to the rigidity center S.

[0026] To summarize, when the entire frame (seismic control frame 1) vibrates, eccentricity between the center of gravity G and the center of rigidity S causes torsional vibration throughout the entire frame. If the angle due to torsional vibration on a certain floor is θ and the distance from the center of rotation (center of rigidity S) to structural face 21 is R, then the amount of displacement due to torsion of structural face 21 can be expressed as θ × R, and therefore the amount of displacement due to torsion increases as the distance R increases. Therefore, by placing the seismic control devices 5 on both end faces (on structural faces 22 in the short side direction), where the distance from the center of rotation to structural face 21 is greatest, it is possible to make the most of the amount of displacement due to torsion, and therefore the effect of the seismic control devices 5 can be effectively demonstrated.

[0027] In this regard, the present invention is suited to using, as the seismic control device 5, steel dampers or friction dampers that generate a resistance force according to the relative displacement between the upper and lower stories of the frame 2, or oil dampers that generate a damping force according to the relative velocity between the upper and lower stories of the frame 2, or inertial mass dampers that generate an inertial force according to the relative acceleration between the upper and lower stories of the frame 2 (Claim 4). All of these are forms that can continue to exert a damping force or inertial force more effectively the greater the amount of inter-story deformation. Hereinafter, resistance force, damping force, and inertial force will be collectively referred to as damping force, etc.

[0028] In this way, in the present invention, the center of rigidity of the entire frame (seismic control frame 1), which has a planar shape with a distinction between the long side and short side directions, is positioned closer to the core structure 3 in the short side direction than the center of gravity of the entire frame, thereby generating torsional vibrations in the entire frame.Then, by placing the seismic control devices 5 on both end faces where the amount of displacement due to torsion is greatest, it is possible to maximize the effect of the seismic control devices 5.

[0029] In the present invention, as long as the center of rigidity S does not coincide with the center of gravity G, it is possible to increase the distance between the ends near the two end faces, allowing the vibration control devices 5 installed within a pair of short-side structural faces 22, 22 to function effectively and allowing the vibration control devices 5 on both sides in the short-side direction to exert damping forces, etc., resulting in a high vibration energy absorption capacity (vibration suppression effect).

[0030] In other words, the vibration control devices 5 facing the short side direction do not necessarily have to be installed within both structural faces 22, 22 in the short side direction of the pair, but by installing them in the short side direction on both sides, it is possible to have both of the vibration control devices 5, 5 on both sides demonstrate their energy absorption capacity, etc. Basically, if the center of rigidity S is located in the center when viewed in the long side direction, the capacity demonstrated by the vibration control devices 5, 5 on both sides in the short side direction will be equal.

[0031] In Patent Document 1, one of the frames in the two short-side directions is always a rigid structural surface, and only the other paired frame in the short-side direction is a flexible structural surface (paragraphs 0013-0015, 0020), so the structure is such that damping forces are generated in the damping devices installed within the flexible structural surface, and the incorporation of damping devices into both opposing short-side directions is not anticipated.Furthermore, there is no concept of expanding inter-story displacement through torsional vibration and allowing seismic control devices installed in a direction perpendicular to the input to exert their function.

[0032] As mentioned above, Patent Document 2 attempts to induce torsional vibrations in the structural surfaces facing two directions of the outer peripheral structural structure, which corresponds to the structural structure of the present invention (paragraphs 0021, 0022, 0029-0037), and therefore, like Patent Document 1, does not consider the perspective of causing one of a pair of structural surfaces in the long side direction to vibrate more strongly than the other, thereby enabling the seismic control device facing the short side direction to demonstrate its function.

[0033] "The vibration control device is installed facing the short side direction on a plane" means that when the frame 2 is viewed in a plane, the axial direction of the vibration control device 5 faces the short side direction, and the device is installed within the structural face 22 facing the short side direction of the frame 2. This is because, if the axial direction of the vibration control device 5 faces the short side direction on a plane, the vibration control device 5 can exert the effect of generating a damping force, etc. when vibrations occur in the frame 2.

[0034] "Generating a damping force, etc., during inter-story deformation due to (torsional) vibration of the frame" means that when torsional vibration occurs in the frame 2, the upper story is displaced more in the torsional direction than the lower story, and therefore the vibration control device 5 is erected so as to generate a damping force, etc., by utilizing the inter-story deformation that occurs between the lower and upper stories. As long as it has the ability to generate a damping force, etc., during relative displacement that occurs between both ends of the vibration control device 5 in the axial direction, it is not particularly limited to the oil damper described above, and the form of the vibration control device 5 is not limited.

[0035] "On both end faces of the frame, or parts of the short side direction near both end faces" means that the seismic control devices 5 are installed not only within the structural faces 22, 22 in the short side direction located on both sides of the long side direction of the frame 2, but also on structural faces additionally arranged in the plane near the structural faces 22, 22 in the short side direction on both sides of the long side direction of the frame 2 as shown in Figure 8-(c). This is because if they are installed near both sides of the long side direction, it is possible to expect the same level of damping force generation effect as when they are installed on both sides of the long side direction.

[0036] By erecting the vibration control devices 5 on both end faces of the frame 2 or on parts of the short side near both end faces, facing the short side, the inclined dampers on at least the elevation (structural face 21) in the long side direction are not exposed to the exterior, which not only eliminates the impact on the exterior design of the structure (seismic control frame 1), but also eliminates restrictions on the view from inside. However, this does not mean that the vibration control devices 5 cannot be erected within the structural face 21 in the long side direction in this invention.

[0037] It also eliminates the difficulty of joining columns made of materials other than steel when braces appear on the elevation (structural face 21) in the long side direction, eliminating restrictions on the structural format. Furthermore, because there is no longer a need to erect braces incorporating seismic control devices 5 in the long side direction of the frame structure 2, there are no restrictions on how they can be combined with the core structure 3, and there are no longer any restrictions on location or road access conditions.

[0038] The vibration control device 5 may be installed on a plane facing the short side direction within the structural face 22 in the short side direction (Claim 1), but since the inter-story deformation becomes large in the horizontal direction when torsional vibration occurs in the entire frame, it is reasonable to arrange the vibration control device 5 with its axial direction facing horizontally.

[0039] Therefore, as shown in Figure 4-(a), it is appropriate that the vibration control device 5 be installed between the upper and lower divided columns 22a, 22a that form the structural face 22 in the short side direction of the frame structure 2 and where relative displacement occurs during inter-story deformation (claim 3). The adjacent columns 22a, 22a on which the vibration control device 5 is installed are joined to the beams 22b that form the structural face 22 in the short side direction by pin joints or semi-rigid joints, so that the relative displacement between the adjacent columns 22a, 22a increases during inter-story deformation.

[0040] "The vibration control device 5 is erected between the upper and lower divided columns 22a, 22a" means, for example, that an upper column (including a wall-shaped column) hangs down from the upper story side of the story on which the vibration control device 5 is erected (straddled), while a lower column (including a wall-shaped column) stands up from the lower story side, and the vibration control device is erected between the upper column and the lower column with its axial direction facing horizontally, which allows the vibration control device 5 to increase the relative displacement between adjacent columns (between the upper column and the lower column) 22a, 22a during inter-story deformation. [Effects of the Invention]

[0041] By placing a core structure with higher rigidity than the frame structure near one side of the short side of the frame, which has a planar shape with a distinction between the long side and short side directions, torsional vibration is induced when the entire frame vibrates, and by utilizing the increased distance between the ends on both end faces or near both end faces, the seismic control device installed in the short side direction of the frame can effectively exert damping force, etc.

[0042] Furthermore, by installing the vibration control devices facing the short side of the structure on both end faces or on a portion of the short side near both end faces, the inclined dampers will not be exposed on the elevation (structural surface) in the long side direction, which will eliminate the impact on the external design of the structure and the restrictions on the view from the inside. It will also eliminate the restrictions on the structural form when braces appear on the structural surface in the long side direction. [Brief explanation of the drawings]

[0043] [Figure 1] This is a plan view showing the deformation of the structural surfaces in the long side direction and the short side direction when vibration in the long side direction occurs in the entire seismic isolation structure consisting of a frame body and a core structure. [Figure 2] (a) is a schematic diagram showing the torsional vibration of the entire frame when an earthquake force acts in the long side direction when the center of rigidity in the plane of the entire frame is located closer to the core structure in the short side direction than the center of gravity in the plane of the entire frame, and (b) is a schematic diagram showing the translational vibration of the entire frame when an earthquake force acts in the long side direction when the center of rigidity coincides with the center of gravity. [Figure 3](a) is a plan view showing an example of a seismic isolation frame that is a more specific version of the frame and core structure shown in Figure 1, and (b) is an elevation view of the column part on a certain floor, showing how the seismic isolation device is installed between the columns divided into upper and lower parts. [Figure 4] (a) is a perspective view showing a seismic control device installed in the center of a wall-like column divided into upper and lower parts that constitutes the structural face in the short side direction of the frame structure, and (b) is an elevation view showing an enlarged portion of (a). [Figure 5] (a) is a perspective view showing the elevation in the long side direction of the entire frame (structure) having the plan shown in Figure 3-(a), (b) is a perspective view showing the elevation showing the long side direction and the short side direction, and (c) is a perspective view showing the indoor side of the frame example shown in (a) and (b). [Figure 6] (a) is an elevation view showing how vibration control devices are installed horizontally between wall-like columns divided into upper and lower sections on each floor, (b) is an elevation view showing an example of an installation of a vibration control device in which a vibration control device is incorporated into a brace that is erected at an angle to the horizontal and vertical, and (c) is an elevation view showing an example of an installation of a vibration control device in which a vibration control device is installed between a part of a brace that is erected within the structural plane and a column. [Figure 7] (a) and (b) are elevation views showing examples of the connections between columns and beams that make up the structural surface in the long side direction. [Figure 8] 1(a) and 1(b) are plan views showing examples of the planar shape of the frame structure, and 1(c) is a plan view showing another example of the arrangement of the vibration control device. [Figure 9] (a) is a plan view showing an example of arranging earthquake-resistant elements within the structural surface facing the long side of the frame that makes up the core structure, and (b) is a plan view showing an example of arranging earthquake-resistant elements toward the short side near both end faces of the core structure. DETAILED DESCRIPTION OF THE INVENTION

[0044] Figure 1 shows a schematic diagram of what happens when torsional vibration occurs in a seismic control frame 1, which is comprised of a multi-story frame 2 with a column-and-beam structure in plan view with a distinct long and short side direction, and a core structure 3 with a column-and-beam structure rigidly connected to one side or to one side of the short side direction of the frame 2. A horizontal member 4 is erected between the core structure 3 and the frame 2, connecting them and joining them to each other.

[0045] The rigidity of the core structure 3 is relatively higher than the rigidity of the frame 2 itself, and so that when an earthquake force is input in the long side direction of the entire seismic isolation frame 1, as described below, the entire seismic isolation frame 1 is prone to torsional vibration, so that the position of the center of rigidity S on the plane of the entire seismic isolation frame 1 including the frame 2 and core structure 3 is located closer to the core structure 3 in the short side direction than the position of the center of gravity G on the plane of the entire seismic isolation frame 1, as shown in Figure 2-(a). On both end faces of the frame 2, or on part of the structural surface 22 in the short side direction closer to both end faces, seismic isolation devices 5 that generate damping force or inertia force when inter-story deformation occurs due to torsional vibration of the entire seismic isolation frame 1 are erected on the plane facing the short side direction.

[0046] In order to effectively utilize the damping force or inertia force that the vibration control device 5 installed within the structural face 22 in the short side direction should exert as a vibration suppression effect, it is appropriate that the ratio of the length in the long side direction of the structure 2 to the length in the short side direction (length in the long side direction / length in the short side direction) be approximately 1.5 or more, and it is more desirable that it be 2.0 or more.

[0047] In order to easily induce torsional vibrations in the entire vibration-damping frame 1 due to earthquake forces mainly in the long-side direction, the columns 21a and beams 21b that make up the structural faces 21, 21 facing the long-side direction in the majority of stories (floors) of the frame 2 are basically pin-jointed or semi-rigidly joined. Also, in the majority of stories of the frame 2, both axial ends of the beams 6 that are erected in the short-side direction between the structural face 21 in the long-side direction on the side farther from the core structure 3 and the core structure 3 are basically pin-jointed or semi-rigidly joined to the columns 21a that make up the structural face 21.

[0048] As shown in Figure 2-(b), if the center of rigidity S on the plane of the entire frame (frame 2) coincides with the center of gravity G on the plane of the entire frame, when an earthquake force is input in the long side direction of the entire frame, the sum of the seismic forces acts on the center of gravity G and tends to vibrate around the center of rigidity S, so the entire frame only vibrates in a translational motion in the direction of the acting seismic force, as shown by the solid line. Therefore, as long as the earthquake force is in the long side direction, even if a seismic control device 5 is installed in the short side direction, it is unlikely that the seismic control device 5 will function.

[0049] In contrast, in the case of Figure 2-(a), where the center of rigidity S on the plane of the entire seismic control structure 1 is located closer to the core structure 3 than the center of gravity G on the plane of the entire seismic control structure 1, the sum of the seismic forces acts on the center of gravity G, just as in the case of (b), but the entire seismic control structure 1 undergoes torsional vibration accompanied by translational vibration, as shown by the solid line.

[0050] In this case, of the two structural faces 21, 21 facing the long side direction of the frame 2, the structural face 21 farther from the rigidity center S moves relatively more than the structural face 21 closer to the rigidity center S, and the amount of relative movement of the structural face 21 farther from the rigidity center S is greater than the amount of relative movement of the structural face 21 closer to the rigidity center S. Accordingly, the amount of relative movement of the end portion closer to the structural face 21 farther from the rigidity center S of the two structural faces 22, 22 facing the short side direction of the frame 2 is greater than the end portion closer to the structural face 21 closer to the rigidity center S.

[0051] As a result, the amount of inter-story deformation within the structural face 22 in the short side direction increases, and the vibration control device 5 installed on a plane within the structural face 22 in the in-plane direction generates a damping force corresponding to the amount of inter-story deformation, or an inertial force that cancels out the vibration of the frame structure 2. As the vibration control device 5, it is preferable to use an oil damper of the type that generates a damping force by utilizing the relative axial movement of two axially separated members as shown in Figure 4, or an inertial mass damper of the type that generates a reaction force as an inertial force by utilizing the relative axial movement of two axially separated members.

[0052] The vibration control device 5 shown in Figure 4 constitutes a structural face 22 in the short side direction (gable side direction), and is installed mainly horizontally between wall-like columns 22a, 22a divided into upper and lower sections, which undergo relative displacement during inter-story deformation as shown in Figure 6-(a), and generates damping force or inertial force when the columns 22a, 22a are displaced relative to each other. The upper and lower columns 22a, 22a on each floor are rigidly joined to the upper and lower beams to which they are connected. The vibration control device 5 shown in Figure 4 is an example of an oil damper, and this vibration control device 5 has a cylinder filled with oil and a piston rod that is movable axially relative to the cylinder, with the cylinder connected to one column 22a and the piston rod connected to the other column 22a.

[0053] Note that, as the vibration control device 5 to be installed within the structural face 22 in the short side direction (gable side direction), other than the dampers mentioned above, steel dampers, friction dampers, viscoelastic dampers, inertial mass dampers, etc. may also be used. Furthermore, since the vibration control device 5 only needs to be installed facing the short side direction on a plane, it may be installed so that it is incorporated into part of a brace 71 and is inclined relative to the horizontal and vertical when the structural face 22 in the short side direction is viewed from above as shown in Figure 6-(b), or it may be installed between part of a brace 71 installed within the structural face 22 and a column 22a as shown in (c).

[0054] Figure 3-(a) shows a specific example of the seismic isolation frame 1 shown in Figure 1. Figure 3-(a) shows an example in which the core structure 3 has a length that spans the entire length of the seismic isolation frame 1 in the long side direction. In Figure 3-(a), the open squares indicate rigid joints between columns and beams, and the black circles indicate joints using pin joints or the like. For convenience, the squares and circles are separated in the figure, but in reality they indicate the same columns 21a and 31a. In the figure, the dashed line of the outermost rectangle indicates the area of ​​the seismic isolation frame 1, and the dashed line of the inner rectangle in the short side direction indicates the area of ​​the core structure 3. Figure 3-(b) shows a situation in which the seismic isolation device 5 is installed between the upper and lower divided columns 22a and 22a at the installation location of the seismic isolation device 5 in (a).

[0055] In this example, the core structure 3 is composed of a structural face 31 facing the long side direction and opposing in the short side direction to the structural face 21 on the outer periphery of the frame 2 facing the long side direction of the core structure 3, and a structural face 32 facing the short side direction, connected to this structural face 31 and erected between the structural face 21 of the frame 2. In this relationship, a beam 32a constituting the structural face 32 in the short side direction is erected in the short side direction between the structural face 31 of the core structure 3 and the structural face 21 of the frame 2 facing it in the short side direction.

[0056] Here, both axial ends of beam 32a constituting structural face 32 facing the short side direction are rigidly joined to columns 31a, 21a constituting both structural faces 31, 21, so structural face 21 facing the long side direction on the core structure 3 side of frame 2 also serves as structural face 31 facing the long side direction of core structure 3. When structural face 21 on the outer periphery side of core structure 3 side of frame 2 becomes part of core structure 3 (serves as structural face 31 of core structure 3), structural faces 31, 31 (21) parallel to each other in the short side direction constitute core structure 3.

[0057] The structural face 31 in the long side direction of the core structure 3 is basically composed of a frame of columns 31a and beams 31b, and the structural face 32 in the short side direction is also basically composed of a frame of columns and beams 32a, but braces or the like may be installed within the frame to increase the rigidity of the core structure 3. Horizontal members 4, which are floor slabs, are installed between the frame structure 2 and the core structure 3. In the example shown in Figure 3-(a), the columns that make up the structural face 32 are also the columns 31a that make up the structural face 31.

[0058] A beam 6, the ends of which in the axial direction are pin-jointed or the like, is erected between a structural face 21 in the long side direction on the side (far side) of the frame structure 2 that is distant from the core structure 3 and a structural face 31 in the long side direction of the core structure 3 that faces it in the short side direction. The end of the beam 6 on the structural face 21 side is joined to a column 21a or a beam 21b that constitutes the structural face 21, and the end on the structural face 31 side is joined to a column 31a or a beam 31b that constitutes the structural face 31. In Figure 3-(a), the many columns 21a that constitute the structural face 21 are aligned in the long side direction, and the beams 6 are pin-jointed or the like to all of the columns 21a.

[0059] Figure 5-(a) shows an example of the appearance of the structural face 21 in the long side direction of the seismic isolation frame 1 shown in Figure 3, and (b) shows an example of the appearance of the structural face 21 in the long side direction and one of the structural faces 22 in the short side direction. In this example, the seismic isolation device 5 (the damper brace in Patent Document 2) does not appear on the structural face 21 on the side farther from the core structure 3, and the column 21a does not bear bending moments, so it is possible to use a member with a small cross-sectional area for the column 21a. There are no restrictions on the material of the column 21a, and precast concrete columns, CFT columns, steel frame columns, wooden columns, etc. can be used.

[0060] Since the material of the columns 21a is not a factor, it is possible to provide a high degree of freedom in the design of the structural face 21 on the side that is farther from the core structure 3. However, since it is not a requirement of the present invention that the vibration control devices 5 not be installed within the structural face 21 in the long side direction, the vibration control devices 5 may be installed within the structural face 21 for the purpose of adjusting the vibration control effect of the vibration control frame 1.

[0061] Furthermore, since the column 21a does not have to bear the bending moment, there is a high degree of freedom in how it is connected to the beam 21b. As shown in Figure 7-(a), the column 21a can be connected to the beam 21b so that it passes vertically (column-first), or the beam 21b can be connected to the beam 21b so that it passes horizontally (beam-first).

[0062] Figure 5-(c) shows the erection state of beam 6 as seen from the indoor side of the seismic isolation frame 1 shown in (a) and (b). In this example, the end of beam 6 on the structural face 21 side is joined by a pin or the like to beam 21b constituting structural face 21, and the end on the structural face 31 side is joined by a pin or the like to beam 31b constituting structural face 31, so that it is erected as a sub-beam. This beam 6 mainly only needs to connect beam 21b of structural face 21 with beam 31b of structural face 31 to support the floor slab (horizontal member 4), and does not need to be expected to have plastic deformation capacity during an earthquake, so electric furnace material can be used, which in that case is significant in bringing about an effect of reducing the environmental load.

[0063] Figures 8-(a) and (b) show examples of the placement of the seismic control devices 5 when the planar shape of the frame 2 (seismic control frame 1) is not rectangular, but is a parallelogram and a trapezoid, respectively. In both cases, the planar shape of the frame 2 is not rectangular, but the relatively long sides are in the long-side direction, and the relatively short sides are in the short-side direction.

[0064] Figure 8-(c) shows an example of arrangement in which the vibration control device 5 is arranged parallel to the short side direction in a plane close to the structural faces 22, 22 in the short side direction of the structural body 2 when the planar shape of the structural body 2 is rectangular. Since the vibration control device 5 within the structural face 22 is erected between adjacent columns 22a, 22a, when arranged outside the structural face 22, the vibration control device 5 is arranged parallel to the structural face 22 and erected between two columns joining the upper and lower stories.

[0065] Figure 9 shows an example where seismic elements 7 such as braces 71 and shear walls are placed within or near the core structure 3 to compensate for lack of rigidity in the long or short side direction in the area of ​​the frame 2 closer to the core structure 3. (a) shows a case where the seismic elements 7 are placed within the structural face 31 in the long side direction of the core structure 3, while (b) shows a case where the seismic elements 7 are placed outside the long side direction of the core structure 3 toward the short side direction. In the case of (b), the seismic elements 7 are placed between the upper and lower stories in the frame 2, parallel to the structural face 22. [Explanation of symbols]

[0066] 1... Vibration control frame, 2...frame structure, 21...structural surface in the long side direction, 21a...column, 21b...beam, 22...structural surface in the short side direction, 22a...column, 22b...beam, 3...core structure, 31...long side structural surface, 31a...column, 31b...beam, 32...short side structural surface, 32a...beam, 4……Horizontal material, 5... Vibration control device, 6...beam, 7...Seismic elements, 71...Braces.

Claims

1. A multi-story frame structure has a planar shape with a distinction between a long side direction and a short side direction and has a column-beam frame structure, and a core structure that is arranged on one side or close to one side in the short side direction of the frame structure, has a column-beam frame rigidly connected, has a rigidity relatively higher than the rigidity of the frame structure, and is connected to a horizontal member that is erected between the frame structure and the core structure, a position of a center of rigidity on a plane of the entire frame including the frame structure and the core structure is located closer to the core structure in the short side direction than a position of a center of gravity on a plane of the entire frame, A seismic control structure characterized in that a seismic control device that generates resistance force, damping force, or inertia force when inter-story deformation occurs due to vibration of the frame is erected on both end faces of the frame or in a part of the short side direction near both end faces, facing in the short side direction.

2. The seismic isolation structure described in claim 1, characterized in that a beam is installed between the structural face of the frame structure on the long side direction away from the core structure and the core structure, with both axial ends connected by pin joints or semi-rigid joints.

3. The seismic control structure described in claim 1 or claim 2, characterized in that the seismic control device forms a structural surface in the short side direction of the frame structure, is installed between upper and lower divided columns where relative displacement occurs during inter-story deformation, and generates a damping force or inertia force when relative displacement occurs between the upper and lower divided columns.

4. 3. A seismic control structure as described in claim 1 or claim 2, characterized in that the seismic control device is a steel damper or friction damper of a type that generates a resistance force corresponding to the relative displacement between the upper and lower floors of the structure, or an oil damper of a type that generates a damping force corresponding to the relative velocity between the upper and lower floors of the structure, or an inertial mass damper of a type that generates an inertial force corresponding to the relative acceleration between the upper and lower floors of the structure.

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