JP2022120562A - Structure and architectural structure - Google Patents

Abstract

To provide a structure capable of generating resistance corresponding to deformation of an architectural structure.SOLUTION: A first structure 100 mainly comprises a left lower gusset plate 110, a right upper gusset plate 120 and a high strength bolt. The left lower gusset plate 110 comprises a plurality of long holes penetrating in a thickness direction. The right upper gusset plate 120 also has the same shape and processing as the left lower gusset plate 110. A brace 200 is a shaft member extending in its longitudinal direction linearly and comprises a lower mount part 210 and an upper mount part 220 at both ends. The lower mount part 210 comprises two plate-like members. The plate-like members are in substantially the same shape and have mount holes which are a plurality of holes penetrating in the thickness direction. A lower end of the brace 200 is mounted to the left lower gusset plate 110. Similar to the lower end, an upper end of the brace 200 is also fixed to the right upper gusset plate 120, that is, fixed to a structure 100.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to structures and buildings that suppress deformation of buildings.

Conventionally, buckling restraint braces are known which are fixed to diagonal gusset plates of a frame and used as braces. A buckling restraint brace comprises a joint plate connected to the ends and an erection piece having a through hole, and a gusset plate having a through hole and a slit. Bolts are inserted through the through holes formed in the gusset plate and the erection piece and are screwed with nuts, thereby fixing the erection piece to the gusset plate. The joint plate of the buckling restraint brace is inserted into the slit of the gusset plate and fixed by welding. As a result, the buckling restraint brace is firmly attached to the frame (Patent Document 1).

Patent No. 6201068

Conventional buckling restraint braces resist frame deformation as soon as the frame begins to deform. However, since the resistance to the frame by the buckling restraint brace is large, if the brace resists the deformation at the same time as the frame starts to deform, the force will concentrate on the part of the frame where the buckling restraint brace is not installed, and that part will be damaged. There is a risk of

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to obtain a structure and a building that generate drag according to deformation of the building.

A structure according to a first invention of the present application is provided at a column-to-beam joint located diagonally in a rectangular structure composed of a column and a beam, and includes a joint member having a long hole and first through holes at both ends. a connecting member for connecting the brace member with the connecting member, the connecting member passing through the first through hole and the elongated hole to connect the connecting member and the brace member.

A structure according to a second invention of the present application is provided at a column-to-beam joint located diagonally in a rectangular structure composed of a column and a beam, and has a joint member having a second through hole, and a first joint member at both ends. a brace member having a through hole; and a connecting member for connecting the brace member to the connecting member, wherein at least one of the second through hole and the first through hole is an elongated hole, and the connecting member includes the second through hole. The connecting member and the brace member are connected by passing through the through hole and the first through hole.

It is preferable that there are a plurality of long holes, and the long axis of each long hole is parallel to the straight line that connects the diagonally positioned column-to-beam joints.

It is preferable that there is only one long hole and that it is pin-connected to the brace member, and that the long axis of the long hole is parallel to the straight line that connects the diagonally positioned column-to-beam joints.

The longitudinal length of the slot is preferably determined based on the elastic deformation area of the building in which the structure is provided.

The coupling member may be a high-strength bolt, and the coefficient of friction of the surfaces of the joining member and the brace member that contact each other may be less than 0.45.

The joining members may be ordinary bolts, and the joint member and the brace member may be joined by the bearing pressure resistance or shear resistance of the ordinary bolts.

The connecting members may be ordinary bolts.

The brace member has two plate-shaped members extending parallel to each other at both ends thereof, and the first through-hole is provided through the two plate-shaped members to join between the two plate-shaped members. A member may be inserted.

A building according to a third invention of the present application includes columns and beams that form a rectangular structure, joint members that are provided at the column-to-beam joints located diagonally in the rectangular structure and have long holes, and first It is characterized by comprising a brace member having a through-hole, and a connecting member passing through the first through-hole and the elongated hole to connect the joint member and the brace member.

A building according to a fourth invention of the present application comprises columns and beams forming a rectangular structure, joint members provided at the column-beam joints located diagonally in the rectangular structure and having second through holes, and a brace member having a first through hole; and a connecting member for connecting the brace member to the connecting member, wherein at least one of the second through hole and the first through hole is an elongated hole, the connecting member comprising: The joint member and the brace member are coupled by passing through the second through hole and the first through hole.

According to the present invention, structures and buildings are provided that produce drag in response to deformation of the building.

1 is a front view of a structure according to a first embodiment; FIG. FIG. 4 is a front view of the gusset plate; Fig. 3 is a plan view of the first brace; FIG. 5 is a schematic diagram of movement of a bolt within a slotted hole; It is a load-deformation curve of a structure using high-strength bolts. It is a load-deformation curve of a structure using high-strength bolts. FIG. 5 is a load deformation curve of a structure using ordinary bolts according to the second embodiment; FIG. It is a load-deformation curve of a structure using ordinary bolts. FIG. 11 is a front view of a structure according to a third embodiment; FIG. 11 is a front view of a structure according to a fourth embodiment; FIG. 11 is a diagram schematically showing movement of the bolt according to the fifth embodiment;

A first structure 100 according to a first embodiment of the present invention will be described below with reference to FIGS.

First, the pillar 10 and the beam 20 on which the first structure 100 is provided will be described. The pillar 10 is made of square steel pipe and includes a right pillar 10r and a left pillar 10l extending substantially parallel in the vertical direction. A building is mainly composed of the first structure 100 , the pillars 10 and the beams 20 . The beam 20 is made of H steel, and includes an upper beam 20u and a lower beam 20b extending substantially parallel in the horizontal direction. The right pillar 10r is connected by welding so as to be perpendicular to the upper beam 20u in the upper part of FIG. 1, and the left pillar 10l is connected by welding so as to be perpendicular to the lower beam 20b in the lower part of FIG. A connection portion between the right column 10r and the upper beam 20u and a joint portion between the left column 10l and the lower beam 20b are referred to as column-to-beam joints 101ru and 101lb, respectively. In this way, the right pillar 10r, the left pillar 10l, the upper beam 20u, and the lower beam 20b are connected in a rectangular shape, thereby forming a rectangular structure. Structural diagonal L is a straight line connecting the intersection of the column center Pr of the right column 10r and the beam center Bu of the upper beam 20u and the intersection of the column center Pl of the left column 10l and the beam center Bb of the lower beam 20b. Hereinafter, the direction in which the upper beam 20u and the lower beam 20b extend is the X-axis direction, the vertical direction in which the right pillar 10r and the left pillar 10l extend is the Z-axis direction, the upper beam 20u, the lower beam 20b, the right pillar 10r, and the left pillar 10l. Description will be made using right-handed coordinates in which the orthogonal direction is the Y-axis direction. Viewing from the X-axis direction is called side view, viewing from the Y-axis direction is called front view, and viewing from the Z-axis direction is called planar view.

The first structure 100 mainly includes a lower left gusset plate 110 and an upper right gusset plate 120 as joint members, and high-strength bolts 115 and 125 as joint members.

The lower left gusset plate 110 is made of steel plate having a predetermined thickness. The thickness of the lower left gusset plate 110, that is, the length in the Y-axis direction, is slightly shorter than the interval between the plate members 211 and 212 of the first brace 200, which will be described later. The length is such that the gusset plate 110 can be inserted. Referring to FIG. 2, the lower left gusset plate 110 is a hexagon in front view with the upper right and lower left corners of a rectangle dropped. The end faces formed by dropping the upper right corner and the lower left corner are respectively referred to as an inner upper end face 110c and an outer lower end face 110a. A flange 111 is welded to the inner end surface 110i of the lower left gusset plate 110 over its entire length, that is, the entire length in the Z-axis direction. The flange 111 is a rectangular steel plate in the XY plane, and has the same length in the Z-axis direction as the entire length of the inner end face 110i. The width of the flange 111 , that is, the length in the Y-axis direction, is appropriately selected according to the yield strength required of the first structure 100 .

Of the front and back surfaces of the lower left gusset plate 110, that is, the two surfaces perpendicular to the Y-axis, at least the surface that contacts the first brace 200 has a coefficient of friction with the first brace 200 that is a predetermined value. It is processed as it should be. This value, ie the predetermined coefficient of friction, will be described later.

The lower left gusset plate 110 has a plurality of elongated holes (second through holes) 112 penetrating in the thickness direction, that is, in the Y-axis direction. The long hole 112 has an oblong shape when viewed from the front. The bottom surface 110b of the left lower gusset plate 110 is welded to the lower beam 20b. Outer end face 110o of lower left gusset plate 110 is welded to left post 10l. As a result, the left lower gusset plate 110 is attached to the column-to-beam joint between the left column 10l and the lower beam 20b.

The number of long holes 112 is determined according to the number of mounting holes of the first brace 200, which will be described later, and is 18 in this embodiment. The elongated holes 112 are arranged in 3 rows and 6 columns when viewed from the Y-axis, and are provided such that their major axes are aligned with the structural diagonal line L and/or a straight line parallel to the structural diagonal line L. That is, in this embodiment, six slots 112 are provided with their major axes aligned with the structural diagonal L, and the other six slots 112 are provided with their major axes parallel to the structural diagonal L and The other six long holes 112 are provided so as to coincide with a straight line separated from the structural diagonal L in the positive direction of the Z-axis by a predetermined distance, and the other six long holes 112 are formed so that their long axes are parallel to the structural diagonal L and extend from the structural diagonal L to the Z-axis. It is provided so as to coincide with the straight line separated by the predetermined distance in the negative direction. Regarding the plurality of long holes 112, the intervals on the structural diagonal line L and on the straight line parallel to the structural diagonal line L are equal. The long axis length of the long hole 112, that is, the length in the direction along the structural diagonal line L is determined by the performance required for the first structure 100, such as the floor height of the floor on which the first structure 100 is provided or the plasticity of the building. Determined according to the deformation area.

Upper right gusset plate 120 also has a similar shape and processing as lower left gusset plate 110 . The upper right gusset plate 120 has a plurality of elongated holes 122 passing through it in the thickness direction, that is, in the Y-axis direction. The slot 122 also has a configuration similar to that of the slot 112 . The bottom surface 120b of the upper right gusset plate 120 is welded to the upper beam 20u, and the outer end surface 120o of the upper right gusset plate 120 is welded to the right post 10r. As a result, the upper right gusset plate 120 is attached to the column-to-beam joint between the right column 10r and the upper beam 20u.

In a building in which the first structure 100 is provided, a beam-to-column joint manufactured in advance at a factory is brought to the construction site and attached to the building. That is, the lower left gusset plate 110 and the upper right gusset plate 120 are also pre-welded to the joint between the left pillar 10l and the lower beam 20b and the joint between the right pillar 10r and the upper beam 20u at the factory, and then brought to the construction site. be. The lower left gusset plate 110 and upper right gusset plate 120 need not be welded to the column 10 and beam 20 at the construction site.

Next, the first brace (brace member) 200 attached to the first structure 100 will be described. The first brace 200 is a so-called buckling restraint brace, has a predetermined yield axial force against tensile force and compressive force in its axial direction, and functions as a vibration damping member within its plastic deformation range. The first brace 200 is a shaft member extending linearly in its longitudinal direction, and has a lower mounting portion 210 and an upper mounting portion 220 at both ends.

The lower mounting portion 210 has two plate-like members 211 and 212 . The two plate-like members 211 and 212 have substantially the same shape and extend from the lower end of the first brace 200 along the axial direction with a predetermined distance d in the Y-axis direction. The distance d is slightly longer than the thicknesses of the lower left gusset plate 110 and the upper right gusset plate 120 described above, and is long enough to allow the lower left gusset plate 110 and the upper right gusset plate 120 to be inserted between the plate members 211 and 212. be. Further, the plate-like members 211 and 212 have mounting holes (first through holes) 211a and 212a which are a plurality of circular holes penetrating in the thickness direction.

The plurality of mounting holes 211a, which are 18 in this embodiment, form 3 rows and 6 columns when viewed from the Y-axis, and are on the axis of the first brace 200 and/or with the axis of the first brace 200. They are provided side by side on parallel straight lines. More specifically, one row of six mounting holes 211a is provided such that their through axes are orthogonal to the axis of the first brace 200, and another row of six mounting holes 211a is a torsion position a predetermined distance away from the axis of the first brace 200 in the positive direction of the Z-axis, and is provided so as to be orthogonal to the axis of the first brace 200 when viewed from the Z-axis direction. , and six mounting holes 211a forming another row are positioned such that their through axes are twisted from the axis of the first brace 200 in the Z-axis negative direction by the predetermined distance, and are positioned from the Z-axis direction. It is provided so as to be orthogonal to the axis of the first brace 200 when viewed. The plurality of mounting holes 211a belonging to the same row have equal intervals on the axis of the first brace 200 or on a straight line parallel to the axis of the first brace 200 on the XZ plane. The mounting hole 212a also has the same configuration as the mounting hole 211a, and is coaxial with the corresponding mounting hole 211a in the Y-axis direction.

As with the lower left gusset plate 110 described above, the planes of the two plate-like members 211 and 212 facing each other are arranged so that the coefficient of friction with the lower left gusset plate 110 is a predetermined value (predetermined coefficient of friction). , is processed. The predetermined coefficient of friction between the lower left gusset plate 110 and the plate-like members 211, 212 is preferably a relatively low value, such as less than 0.45, or 0.1 to 0.4 or 0.1 to 0.1. 0.3 is preferred, more preferably 0.15 to 0.35, still more preferably 0.2 to 0.35. Processing includes, for example, galvanizing, black scale (oxide film) processing, Shinmyotan coating, and polishing surface processing. With respect to the lower left gusset plate 110, zinc plating provides a coefficient of friction of 0.1 to 0.3, black scale treatment provides a coefficient of friction of 0.2 to 0.35, and Shinmyotan coating provides a coefficient of friction of 0.2 to 0.35, for example. A coefficient of friction of 0.15 to 0.25 is obtained, and for example, a coefficient of friction of 0.2 to 0.35 can be obtained in polishing.

The lower end of first brace 200 is attached to lower left gusset plate 110 . Specifically, after the mounting holes 211a and 212a are aligned with the long holes 112 of the lower left gusset plate 110, the high strength bolts 115 are inserted into all of the mounting holes 211a, 212a and 112. The first brace 200 is secured to the lower left gusset plate 110 or joined to the first structure 100 by threading through and tightening with a nut. With the above configuration, the lower mounting portion 210 and the left lower gusset plate 110 are friction-joined with a low frictional force.

Similarly to the lower mounting portion 210, the upper mounting portion 220 also has two plate members 221 and 222 and mounting holes 221a and 222a. The configuration of the plate-like members 221 and 222 and the mounting holes 221a and 222a is the same as that of the plate-like members 211 and 212 and the mounting holes 211a and 212a, so the description thereof is omitted. Similarly to the lower end, the upper end of the first brace 200 is also placed at a position where the mounting holes 221a and 222a of the upper end are aligned with the long hole 122 of the upper right gusset plate 120, and then the mounting hole 221a and the mounting hole 222a are aligned. 222 a and all of the long holes 122 are passed through high-strength bolts 125 and tightened with nuts to fix to the upper right gusset plate 120 , that is, to connect to the first structure 100 . With the above configuration, the upper attachment portion 220 and the upper right gusset plate 120 are friction-joined with a low frictional force. The manner in which the first brace 200 is attached to the first structural body 100 in this way is called a one-way arrangement.

Next, functions and actions of the first structure 100 will be described with reference to FIGS. 1 and 4 to 6. FIG. Before the first structure 100 is deformed, that is, before the upper beam 20u is displaced left and right in FIG. ), the high-strength bolts 115 and 125 are pre-placed downward in the gravitational direction in the long holes 112 and 122 .

A case in which the upper beam 20u is displaced to the left in FIG. 1 and thereby a compressive force acts on the first brace 200 will be described. When a compressive force acts on first brace 200 , a force acts on high-strength bolt 115 and high-strength bolt 125 to separate them from each other in the axial direction of first brace 200 . At this time, the high-strength bolt 115 is fixed in contact with the gravitational direction downward in the long hole 112 and cannot move downward in the gravitational direction. It is movable (see FIG. 4(A)). Here, as described above, the upper mounting portion 220 and the upper right gusset plate 120 are friction-joined with a low frictional force. Therefore, when the force applied by the seismic force is smaller than the frictional force between the upper mounting portion 220 and the upper right gusset plate 120, the first structure 100 is slightly deformed, while the upper mounting portion 220 and the upper right gusset plate 120 The gusset plate 120 is frictionally secured together such that the first brace 200 resists compressive forces. The period during which the upper mounting portion 220 and the upper right gusset plate 120 are fixed to each other by frictional force, in other words, the high-strength bolt 125 moves from the bottom to the top in the gravitational direction in the elongated hole 122 when the axial force exceeds the frictional force from the stationary state. Period A is the period up to the time when it begins to move to . Period A is indicated by dashed line 51 in FIG. 5 and dashed line 61 in FIG. A dashed line 51 in FIG. 5 and a dashed line 61 in FIG. 6 indicate the relationship between seismic force and interlayer deformation of only the first brace 200 . A solid line 52 in FIGS. 5 and 6 indicates the relationship between the seismic force and the deformation between floors of the frame of the building, which is the frame of the pure Rahmen frame only in this embodiment. The wind load generated on the building by the wind is smaller than the seismic force, and is about the seismic force shown in period A in FIG. That is, by friction-bonding the upper mounting portion 220 and the upper right gusset plate 120 with a low frictional force, the first structure 100 can withstand wind loads. By adjusting the frictional force between the upper mounting portion 220 and the upper right gusset plate 120, the length of period A is adjusted and the magnitude of the opposing wind load is adjusted. The friction force between the upper mounting portion 220 and the upper right gusset plate 120 is determined based on the magnitude of the wind load determined based on design specifications.

When the axial force due to the deformation exceeds the frictional force, the high-strength bolt 125 begins to move upward in the gravitational direction within the long hole 122, and thereafter the high-strength bolt 125 moves upward in the gravitational direction in the long hole 122. It hits (see FIG. 4(B)). A period B is a period from when the high-strength bolt 125 starts to move from the bottom in the direction of gravity to when it hits the top in the direction of gravity in the elongated hole 122 . Period B is indicated by dashed line 51 in FIG. 5 and dashed line 61 in FIG. During period B, the high-strength bolt 125 only moves within the long hole 122, and the same compressive force as during period A continues to act on the first brace 200, but the compressive force is no change. The pure Rahmen frame bears the increasing load in period B. The length of the period B can be adjusted by adjusting the longitudinal length of the slot 122 . The longitudinal length of the long hole 122 is determined according to the performance required of the first structure 100 or according to the period B determined based on the design specifications.

If the upper beam 20u continues to be displaced while the high-strength bolt 125 abuts the long hole 122 upward in the direction of gravity, further compressive force is applied from the left lower gusset plate 110 and the upper right gusset plate 120 to the first brace 200. . Then, when the compressive force continues to be applied and the yield axial force of the first brace 200 is exceeded, the first brace 200 yields. A period C is a period from when the high-strength bolt 125 hits the elongated hole 122 upward in the gravity direction, that is, when the compressive force starts to act on the first brace 200, until the first brace 200 yields. . A period D is a period after the first brace 200 yields. Periods C and D are indicated by dashed line 51 in FIG. 5 and dashed line 61 in FIG.

A case in which the upper beam 20u is displaced to the right in FIG. 1 and a tensile force acts on the first brace 200 will be described. When a tensile force acts on first brace 200 , a force acts on high-strength bolt 115 and high-strength bolt 125 to bring them closer together in the axial direction of first brace 200 . At this time, the high-strength bolt 125 is fixed in contact with the gravitational direction downward in the long hole 122 and cannot move downward in the gravitational direction. It can move upward (see FIG. 4(A)). Here, as described above, the lower mounting portion 210 and the lower left gusset plate 110 are friction-joined with a low frictional force. Therefore, when the force applied by the seismic force is smaller than the frictional force between the lower mounting portion 210 and the lower left gusset plate 110, the first structure 100 is slightly deformed, but the lower mounting portion 210 and the lower left gusset plate 110 are separated. The gusset plate 110 is frictionally secured together to allow the first brace 200 to resist tensile forces. In general, wind loads on buildings caused by wind are weaker than seismic forces. Therefore, by friction-bonding the lower mounting portion 210 and the lower left gusset plate 110, when a wind load is transmitted from the first structure 100 to the first brace 200, the lower mounting portion 210 and the lower left gusset plate 110 will be separated from each other. are fixed in place and the first structure 100 to the first brace 200 resist the wind loads. During the period in which the lower mounting portion 210 and the lower left gusset plate 110 are fixed to each other by frictional force, in other words, the high-strength bolt 115 moves from the bottom to the top in the gravitational direction in the elongated hole 112 when the axial force exceeds the frictional force from the stationary state. Period A is the period up to the time when it begins to move to . By adjusting the frictional force between the lower mounting portion 210 and the left lower gusset plate 110, the length of period A is adjusted and the magnitude of the opposing wind load is adjusted. In other words, the frictional force between the lower mounting portion 210 and the lower left gusset plate 110 is determined based on the amount of wind load determined based on design specifications.

When the axial force due to the deformation exceeds the frictional force, the high-strength bolt 115 begins to move upward in the gravitational direction, after which the high-strength bolt 115 hits the long hole 112 upward in the gravitational direction (Fig. 4 ( C)). A period B is a period from when the high-strength bolt 115 starts to move from the bottom in the direction of gravity to when it hits the top in the direction of gravity in the elongated hole 112 . During the period B, the high-strength bolt 115 only moves within the long hole 112, and the same tensile force as in the period A continues to act on the first brace 200, but the tensile force no change. The pure Rahmen frame bears the increasing load in period B. The length of the period B can be adjusted by adjusting the longitudinal length of the slot 112 . In other words, the longitudinal length of the long hole 112 is determined according to the performance required of the first structure 100 or according to the period B determined based on the design specifications.

When the upper beam 20u continues to be displaced while the high-strength bolt 115 abuts the long hole 112 upward in the gravity direction, a tensile force is further applied to the first brace 200 from the left lower gusset plate 110 and the upper right gusset plate 120. . Then, when the tensile force continues to be applied and exceeds the yield axial force of the first brace 200, the first brace 200 yields. A period C is a period from when the high-strength bolt 115 hits the long hole 112 upwardly due to gravity, that is, when a tensile force starts to act on the first brace 200 until the first brace 200 yields. Period D is the period after the first brace 200 yields.

Movements of the first structure 100 and the first brace 200 described above will be described below using inter-layer deformation and seismic force of the frame of the building.

FIG. 5 shows the relationship between the seismic force and the interlayer deformation in the skeleton only, the skeleton having the first structure 100 and the first brace 200 , and the first brace 200 . One aspect of the first brace 200 shown in FIG. 5 is to allow the first brace 200 to act on the skeleton relatively early, and the longitudinal lengths of the long holes 112 and 122 are set relatively short. be done.

A dashed line 51 indicates the relationship between the seismic force of only the first brace 200 and the interlayer deformation. As described above, in period A, the high-strength bolts 115 and 125 are generated between the first brace 200 and the first structure 100 in the long holes 112 and 122 from the start of displacement of the upper beam 20u. It is stationary due to some static friction. In period B, the high-strength bolts 115 and 125 start moving from below in the gravitational direction in the elongated holes 112 and 122 and strike upward in the gravitational direction. In period C, when the upper beam 20u is displaced to the left in FIG. 1 and a compressive force acts on the first brace 200, the high-strength bolt 125 hits the long hole 122 upward due to gravity, thereby causing the first brace to move. An axial compressive force begins to act on 200 and further compressive force is applied to cause the first brace 200 to yield. On the other hand, during the period C, when the upper beam 20u is displaced to the right in FIG. Axial tensile force begins to act on the first brace 200, and further tensile force is applied to cause the first brace 200 to yield. During period D, the first brace 200 has yielded.

A solid line 52, which is a comparative example, shows the relationship between the seismic force and the interlayer deformation of only the skeleton of a building, which is a pure Rahmen frame in this embodiment. After the seismic force begins to act, the frame begins to undergo inter-layer deformation.

A dashed-dotted line 53 is an example according to the present embodiment, and indicates the relationship between seismic force and interlayer deformation in a skeleton having the first structure 100 and the first braces 200 . In this embodiment, the inter-story deformation angle is within 1/200 and the upper structure (structure above the foundation) is within the elastic limit for level 1 seismic motion, and the inter-story deformation is for level 2 seismic motion. The goal is to keep the corner within 1/100 and the layer plasticity ratio within 2.0. Here, level 1 seismic motion refers to seismic motion that is highly likely to be received at least once during the service life of the building. Designed. Level 2 seismic motion refers to the seismic motion that is considered to be the strongest in the past and future on the site of the building. It is designed with the goal of not causing damage that could cause In this embodiment, the longitudinal lengths of the long holes 112 and 122 are determined so that the superstructure is within the elastic deformation region for level 2 seismic motion. The value according to this embodiment is obtained by adding the value indicated by the dashed line 51 and the value indicated by the solid line 52 .

During the period A, the building frame subjected to the wind load is slightly deformed, thereby applying the load to the first structure 100 . Here, as described above, the upper attachment portion 220 and the upper right gusset plate 120, and the lower attachment portion 210 and the lower left gusset plate 110 are friction-joined with a low friction force. Therefore, when the seismic force is slight, the upper mounting portion 220 and the upper right gusset plate 120, and the lower mounting portion 210 and the lower left gusset plate 110 are mutually deformed by frictional force while the first structure 100 is slightly deformed. Fixed, the first brace 200 resists tensile and compressive forces.

Then, when the axial force due to deformation exceeds the frictional force, the dashed line 53 shifts to period B, and when compressive force is applied to the first brace 200, the high-strength bolt 125 moves into the long hole 122. , the high-strength bolt 125 hits the long hole 122 upward in the direction of gravity (see FIG. 4B), and a tensile force is applied to the first brace 200. In this case, the high-strength bolt 115 begins to move upward in the gravitational direction within the long hole 112, after which the high-strength bolt 115 hits upward in the gravitational direction within the long hole 112 (FIG. 4C). reference). This period B corresponds to the seismic force Q1 of level 1, but the axial force applied to the first brace 200 does not change and does not sufficiently resist the seismic force applied during this period. . The building resists the seismic force Q1 with a pure rigid-frame structure of columns 10 and beams 20 . Since the first braces 200 generally have a high rigidity, the natural period of a building incorporating the first braces 200 is significantly different from the natural period of a building not incorporating the first braces 200 . However, according to this embodiment, since the first brace 200 does not sufficiently resist the seismic force during the period B, the natural period of the building during the period B is It can be a value close to the natural period. As a result, the response of the building, such as response displacement and response acceleration, can be reduced.

Further, when the upper beam 20u continues to be displaced, the dashed-dotted line 53 shifts to period C. This period C corresponds to a level 2 seismic force Q2 and begins shortly before the seismic force reaches level 2 seismic force Q2. As described above, the lengths of the long holes 112 and 122 are determined according to the performance required of the first structure 100. In this embodiment, the length of the long holes 112 and 122 is just before the seismic force reaches level 2 seismic force Q2. First, the lengths of the high-strength bolts 115 and 125 are determined such that they abut upward in the gravitational direction in the elongated holes 112 and 122 . This length is determined in consideration of the structure of the building, seismic force, and the like. A pure rigid-frame frame building without the first structure 100 and the first brace 200 according to this embodiment enters the plastic deformation region F when subjected to a seismic force Q2 of level 2, as indicated by the solid line 52. will enter. However, the building including the first structure 100 and the first brace 200 according to the present embodiment is still in the elastic deformation region E even when subjected to the level 2 seismic force Q2, as indicated by the dashed line 53. . As a result, the amount of residual deformation of the building can be suppressed even if it receives level 2 seismic motion, and even after receiving level 2 seismic motion, it is possible to continue using the building without dismantling it.

When a force exceeding the seismic force Q2 is applied to the building, the first brace 200 is further deformed and enters the plastic deformation region (period G). On the other hand, the pure Rahmen frame is still in the elastic deformation region E, and after the period G, the pure Rahmen frame resists the seismic force. If the seismic force is within the period G, the pure rigid-frame frame is still in the elastic deformation region E, so the building can be used only by replacing the first brace 200 . Then, when a larger seismic force is applied, the pure rigid-frame frame enters the plastic deformation region F.

FIG. 6 shows the relationship between the seismic force and the interlayer deformation in the skeleton only, the skeleton having the first structure 100 and the first braces 200 , and the first braces 200 . One aspect of the first brace 200 shown in FIG. 6 is to allow the first brace 200 to act relatively slowly on the skeleton, and the longitudinal lengths of the long holes 112, 122 are shown in FIG. set longer than that. Since the solid line 52 is the same as in FIG. 5, the description is omitted.

A dashed line 61 indicates the relationship between the seismic force of only the first brace 200 and the interlayer deformation. As described above, in period A, the high-strength bolts 115 and 125 are generated between the first brace 200 and the first structure 100 in the long holes 112 and 122 from the start of displacement of the upper beam 20u. It is stationary due to some static friction. In period B, the high-strength bolts 115 and 125 start moving from below in the gravitational direction in the elongated holes 112 and 122 and strike upward in the gravitational direction. In period C, when the upper beam 20u is displaced to the left in FIG. 1, an axial compressive force begins to act on the first brace 200 from the moment the high-strength bolt 125 hits the long hole 122 upward due to gravity. , then the first brace 200 yields. On the other hand, when the upper beam 20u is displaced to the right in FIG. 1, an axial tensile force begins to act on the first brace 200 when the high-strength bolt 115 collides with the long hole 112 upwards due to gravity. , the first brace 200 yields. Then, in period D, the first brace 200 yields. In this embodiment, the lengths of the long holes 112 and 122 are set longer than those shown in FIG. long.

A dashed-dotted line 63 is an example according to the present embodiment, and indicates the relationship between the seismic force and the interlayer deformation in the skeleton in which the first brace 200 is incorporated in the first structure 100 . In this embodiment, for a level 1 earthquake motion, the inter-story drift angle is within 1/200 and the upper structure is within the elastic limit. The target is a plasticity rate of 2.0 or less. The value according to this embodiment is obtained by adding the value indicated by the dashed line 61 and the value indicated by the solid line 52 . Since the behavior in period A is the same as in FIG. 5, the description is omitted.

When the axial force due to deformation exceeds the frictional force generated between the upper mounting portion 220 and the upper right gusset plate 120, and between the lower mounting portion 210 and the lower left gusset plate 110, the dashed line 63 shifts to period H, When the upper beam 20u is displaced leftward in FIG. 1 and a compressive force acts on the first brace 200, the high-strength bolt 125 begins to move upward in the gravitational direction within the long hole 122, and then moves upward in the direction of gravity. The force bolt 125 abuts upward in the gravitational direction inside the long hole 122 (see FIG. 4(B)). When the upper beam 20u is displaced to the right in FIG. 1 and a tensile force acts on the first brace 200, the high-strength bolt 115 begins to move upward in the gravitational direction within the long hole 112, and then moves upward in the direction of gravity. The force bolt 115 abuts upward in the gravitational direction inside the long hole 112 (see FIG. 4(C)). This period H corresponds to the seismic force Q1 of level 1, but the axial force applied to the first brace 200 does not change and does not sufficiently resist the seismic force applied during this period. . The building resists the seismic force Q1 with a pure rigid-frame structure consisting of columns 10 and beams 20 . Since the first brace 200 generally has a high rigidity, the natural period of the building incorporating the brace 200 is significantly different from the natural period of the building not incorporating the brace 200 . However, according to this embodiment, since the first brace 200 does not sufficiently resist the seismic force during the period H, the natural period of the building during the period H is It can be a value close to the natural period. As a result, the response of the building, such as response displacement and response acceleration, can be reduced.

When the upper beam 20u is further displaced, period I is entered. In period I, the seismic force exceeds Q2, but the high-strength bolts 115 and 125 have not yet struck the long holes 112 and 122 above in the gravitational direction, and all the seismic force is applied to the pure rigid frame. As a result, the pure Rahmen frame deviates from the elastic deformation region E in the period I. If seismic force is applied even after the pure rigid frame frame deviates from the elastic deformation region E and enters the plastic deformation region F, the high-strength bolts 115 and 125 collide with each other in the long holes 112 and 122 upward in the gravity direction (Fig. 4 (B), (C)), a load, ie, an axial force is applied to the first brace 200 . The axial force is an axial compressive force when the upper beam 20u is displaced leftward in FIG. 1, and an axial tensile force when the upper beam 20u is displaced rightward in FIG. A period I is a period from when the pure rigid-frame frame deviates from the elastic deformation region E to when the high-strength bolts 115 and 125 hit the long holes 112 and 122 upward in the direction of gravity. As the seismic force continues to be applied, the first brace 200 deforms from the elastic deformation region into the plastic deformation region. A period J is a period from when the high-strength bolts 115 and 125 collide with the long holes 112 and 122 upward in the gravitational direction until the first brace 200 enters the plastic deformation area from the elastic deformation area. Further seismic force is applied and the first brace 200 deforms from the elastic deformation region into the plastic deformation region. A period K is a period after the first brace 200 enters the plastic deformation region.

In this embodiment, theoretically, the pure rigid frame frame enters the plastic deformation region F before the first brace 200, but since the actual design value is based on a margin value, the seismic force is actually applied. It is known that the pure Rahmen frame does not enter the plastic deformation region F in the case of Therefore, if the first structural body 100 is configured as in this embodiment, it is possible to lower the yield strength of the pure Rahmen frame, reduce the cost of the frame, and realize an economical design.

According to this embodiment, a structure and a building are obtained that generate drag in accordance with the deformation of the building.

In recent years, with regard to design criteria (judgment criteria), rather than rarely occurring Level 1 earthquake motions, Level 2 earthquake motions, which occur very rarely, are often used to determine the member cross sections of main structural members. In this case, the member cross section determined by the level 2 seismic motion is larger than the member cross section determined by the level 1 seismic motion, which tends to increase the building frame cost. In addition, when a high level of seismic performance is demanded by business owners, there is a tendency for the cross-section of members to increase, resulting in an increase in building frame costs. However, according to this embodiment, since the brace bears the seismic motion exceeding Level 1 seismic motion, the member cross section of the main structural member can be reduced, and the cost can be reduced.

In addition, even if seismic performance higher than level 2 seismic motion is required, the required seismic performance can be satisfied using the first structure 100, and a special structure is applied to the main structural members such as columns and beams. Therefore, it can be handled without special design and construction. Furthermore, according to this embodiment, the first brace 200 does not act when it receives a long-term load and level 1 seismic motion, but can act when it receives a level 2 seismic motion. Even when subjected to large earthquakes, the columns and beams are kept within the elastic deformation range to reduce the amount of residual deformation, that is, to minimize damage. can be done. That is, the first structure 100 according to the present embodiment is more effective for a building whose target is seismic performance of level 2 or higher.

According to this embodiment, it is possible to reduce the amount of inter-story displacement of a building in any seismic motion.

In general, braces bearing long-term loads are legally required to be covered with fireproof coating. Since it does not bear the burden, fireproof coating is not required.

Also, it is possible to suppress an increase in the axial force that generally occurs in the pillar to which the brace is attached. When a brace is attached to a column that does not have the first structure 100 according to the present embodiment, an axial force is applied to the brace from the beginning of deformation, which generates a pull-out force on the column. I had to design to counter it. However, according to this embodiment, since the high-strength bolts 115 and 125 move in the long holes 112 and 122 at the beginning of the deformation and no axial force is applied to the first brace 200, the pulling force generated in the column is small. Therefore, it is not necessary to design according to the pull-out force from the beginning of deformation. This also increases the types of buildings to which the first brace 200 can be applied.

According to this embodiment, even after the skeleton and the first braces 200 have entered the plastic deformation region, both the skeleton and the first braces 200 resist the seismic force, and the response displacement to the seismic force is Response acceleration can be reduced.

The elongated holes 112 may be provided in the lower mounting portion 210 and the upper mounting portion 220 of the first brace 200, and the mounting holes 211a and 212a may be formed in the lower left and upper right gusset plates 110 and 120, respectively. In this case, lower left gusset plate 110 , upper right gusset plate 120 , high strength bolts 115 , 125 and first brace 200 form first structure 100 .

Alternatively, only one of the lower mounting portion 210 and the upper mounting portion 220 of the first brace 200 may be provided with mounting holes, and only the corresponding lower left gusset plate 110 or upper right gusset plate 110 may be provided with elongated holes. At this time, it is preferable that the length of the long hole in the direction along the structural diagonal line L is approximately double the length in the mode in which the long holes are provided in both the lower mounting portion 210 and the upper mounting portion 220 .

In addition, although friction processing is performed on all surfaces of the lower left gusset plate 110 and the plate-like members 211 and 212 that face each other, only the surfaces of the lower left gusset plate 110 and the plate-like members 211 that face each other, or the lower left gusset plate 110 Friction processing may be applied only to the mutually facing surfaces of the plate member 212 and the plate member 212 . This makes it possible to obtain a wide adjustment range with respect to the slip resistance.

Next, a second structure according to a second embodiment of the invention will be described with reference to FIGS. 1-4, 7 and 8. FIG. Unless otherwise described, in this embodiment, the same reference numerals are given to the same configurations as in the first embodiment, and the description thereof will be omitted. The second structure is indicated with reference numeral 100 in FIGS. In this embodiment, the lower left gusset plate 110, the upper right gusset plate 120, the lower attachment portion 210 (plate-like members 211 and 212), and the upper attachment portion 220 (plate-like members 221 and 222) are not processed to reduce the coefficient of friction. , the high-strength bolts 115, 125 are replaced by ordinary bolts. Hereinafter, the bolts 115, 125 shown in FIGS. 1 and 4 will be described as ordinary bolts 115, 125. As shown in FIG. With these configurations, the lower mounting portion 210 and the lower left gusset plate 110, and the upper mounting portion 220 and the upper right gusset plate 120 are joined in expectation of bearing pressure resistance or shear resistance of the ordinary bolts 115, 125. . When using ordinary bolts, the bolts are tightened with a lower axial force than when using high-strength bolts. and the upper right gusset plate 120 is lower than when using high strength bolts.

The movement of the second structure 100 and the first brace 200 according to the second embodiment will be described in consideration of the inter-layer deformation of the skeleton of the building.

FIG. 7 shows the relationship between the seismic force and the interlayer deformation in the skeleton only, the skeleton having the second structure 100 and the first brace 200 , and the first brace 200 . One aspect of the first brace 200 shown in FIG. 7 is to allow the first brace 200 to act on the skeleton relatively early, and the longitudinal lengths of the long holes 112 and 122 are set relatively short. is determined according to the period from when the upper beam 20u starts to be displaced to when the first brace 200 exerts force on the second structure 100. FIG.

A dashed line 71 indicates the relationship between the seismic force of only the first brace 200 and the interlayer deformation. In this embodiment, when a load (seismic force) is applied, the upper beam 20u is displaced leftward in FIG. It starts moving from the downward direction and hits upward in the direction of gravity. On the other hand, when the upper beam 20u is displaced to the right in FIG. 1 and a tensile force acts on the first brace 200, the normal bolt 115 starts moving from below in the gravitational direction in the long hole 112 and strikes upward in the gravitational direction. . A period from when the bolts 115 and 125 start moving in the elongated holes 112 and 122 until they strike upward in the gravitational direction is called a period B'. The time from when the bolts 115 and 125 hit the long holes 112 and 122 upward due to gravity and a compressive force begins to act on the first brace 200 to when an axial force is applied to the first brace 200 and the first brace 200 yields The period is referred to as period C'. The period after the first brace 200 yields is referred to as period D'. Since the solid line 52 is the same as in the first embodiment, the explanation is omitted.

A dashed-dotted line 73 is an example according to the present embodiment, and indicates the relationship between seismic force and interlayer deformation in a skeleton having the second structure 100 and the first braces 200 . The dashed-dotted line 73 overlaps the solid line 52 during the period B'. In this embodiment, for a level 1 earthquake motion, the inter-story drift angle is within 1/200 and the upper structure is within the elastic limit. The target is a plasticity rate of 2.0 or less. The value according to this embodiment is obtained by adding the value indicated by the dashed line 71 and the value indicated by the solid line 52 .

In period B', the ordinary bolts 115, 125 begin to move upward in the gravitational direction within the long holes 112, 122, after which the ordinary bolts 115, 125 hit upward in the gravitational direction within the long holes 112, 122. (See FIGS. 4B and 4C). This period B' corresponds to the level 1 seismic force Q1, but the first brace 200 receives no axial force and does not perform its function. Therefore, the building resists the seismic force Q1 with a pure rigid-frame structure consisting of columns 10 and beams 20 . Since the first braces 200 generally have a high rigidity, the natural period of a building incorporating the first braces 200 is significantly different from the natural period of a building not incorporating the first braces 200 . However, according to this embodiment, the natural period of the building in the period B can be made close to the natural period of the building in which the first brace 200 is not incorporated. As a result, the response of the building, such as response displacement and response acceleration, can be reduced.

As the upper beam 20 u continues to displace, the dashed-dotted line 73 transitions to period C′, and tensile force acts on the first brace 200 from the lower left gusset plate 110 and the upper right gusset plate 120 . This period C' corresponds to a level 2 seismic force Q2 and begins shortly before the seismic force reaches level 2 seismic force Q2. As described above, the lengths of the long holes 112 and 122 are determined according to the performance required of the second structure 100. In this embodiment, the length of the long holes 112 and 122 is just before the seismic force reaches level 2 seismic force Q2. First, the lengths of the bolts 115 and 125 are determined so that they abut upward in the direction of gravity in the elongated holes 112 and 122 . This length is determined in consideration of the structure of the building, seismic force, and the like. A building with a pure Rahmen frame that does not include the second structure 100 and the first brace 200 according to the present embodiment is subjected to a seismic force Q2 of level 2, as indicated by the solid line 52, in the plastic deformation region F. will enter. However, the building including the second structure 100 and the first brace 200 according to this embodiment is still in the elastic deformation region E even if it receives the level 2 seismic force Q2, as indicated by the dashed line 53. . As a result, the amount of residual deformation of the building can be suppressed even if it receives level 2 seismic motion, and even after receiving level 2 seismic motion, it is possible to continue using the building without dismantling it.

When a force exceeding the seismic force Q2 is applied to the building, the first brace 200 is further deformed into the plastic deformation region (period G'). On the other hand, the pure Rahmen frame is still in the elastic deformation region E, and after this, the pure Rahmen frame will resist the seismic force. Then, when a larger seismic force is applied, the pure rigid-frame frame enters the plastic deformation region F. If the seismic force is in the period G′, the pure rigid frame is still in the elastic deformation region E, so the building can be used only by replacing the first brace 200 .

FIG. 8 shows the relationship between the seismic force and the interlayer deformation in the skeleton only, the skeleton having the second structure 100 and the first brace 200 , and the first brace 200 . One aspect of the first brace 200 shown in FIG. 8 is to allow the first brace 200 to act relatively slowly on the skeleton, and the longitudinal lengths of the long holes 112, 122 are shown in FIG. set longer than that. Since the solid line 52 is the same as in the first embodiment, the explanation is omitted.

A dashed line 81 indicates the relationship between the seismic force of only the first brace 200 and the interlayer deformation. In period B', when the upper beam 20u is displaced leftward in FIG. bump into. On the other hand, when the upper beam 20u is displaced to the right in FIG. 1 and a tensile force acts on the first brace 200, the normal bolt 115 starts moving from below in the gravitational direction in the long hole 112 and strikes upward in the gravitational direction. . The range of the inter-story deformation angle in the period B' is set longer than that shown in FIG. 7, and is slightly longer than the range of the inter-story deformation angle in the elastic deformation region E of the pure rigid frame. In other words, theoretically, the pure rigid frame frame enters the plastic deformation region before the first brace 200 does. During period C', the bolts 115, 125 hit the gravitationally upward direction at the long holes 112, 122, thereby starting to apply a compressive force to the first brace 200, further applying an axial force to the first brace 200. Surrender. During period D', the first brace 200 has yielded.

A dashed-dotted line 83 is an example according to the present embodiment, and indicates the relationship between seismic force and interlayer deformation in a skeleton having the second structure 100 and the first braces 200 . The dashed-dotted line 83 overlaps the solid line 52 during the period B'. In this embodiment, for a level 1 earthquake motion, the inter-story drift angle is within 1/200 and the upper structure is within the elastic limit. The target is a plasticity rate of 2.0 or less. The value according to this embodiment is obtained by adding the value indicated by the dashed line 81 and the value indicated by the solid line 52 .

When seismic force is applied to the building and the upper beam 20u begins to be displaced, the dashed line 53 shifts to period H', and the ordinary bolts 115 and 125 move upward in the gravitational direction within the long holes 112 and 122. begin to When the upper beam 20u is further displaced, the seismic force exceeds Q1 and Q2, but the axial force is not yet applied to the first brace 200, and the pure Rahmen frame deviates from the elastic deformation region E. A period from when the bolts 115 and 125 start to move upward in the gravitational direction to when the pure rigid-frame frame deviates from the elastic deformation region E is called a period H'. If seismic force is applied even after the pure Rahmen frame deviates from the elastic deformation region E and enters the plastic deformation region F, the ordinary bolts 115 and 125 hit upward in the gravitational direction inside the long holes 112 and 122 (Fig. 4 (B), (C)), an axial force is applied to the first brace 200 . A period from when the pure rigid-frame frame deviates from the elastic deformation region E to when the ordinary bolts 115 and 125 hit the long holes 112 and 122 upward in the gravitational direction is called a period I'. As the seismic force continues to be applied, the first brace 200 deforms from the elastic deformation region into the plastic deformation region. A period from when the bolts 115 and 125 hit the elongated holes 112 and 122 upward in the gravitational direction to when the first brace 200 enters the plastic deformation region is called a period J'. A period after the first brace 200 enters the plastic deformation region is called a period K'.

In this embodiment, theoretically, the pure rigid frame frame enters the plastic deformation region F before the first brace 200, but since the actual design value is based on a margin value, the seismic force is actually applied. It is known that the pure Rahmen frame does not enter the plastic deformation region F in the case of Therefore, if the second structural body 100 is configured as in this embodiment, it is possible to lower the yield strength of the pure Rahmen frame, reduce the cost of the frame, and realize an economical design.

According to this embodiment, the same effects as those of the first embodiment are obtained.

Moreover, in this embodiment, since ordinary bolts are used, the construction procedure such as torque control required for high-strength bolts is simplified. Moreover, since the shape of the bolt hole is large, the first brace can be easily attached.

The elongated holes 112 may be provided in the lower mounting portion 210 and the upper mounting portion 220 of the first brace 200, and the mounting holes 211a and 212a may be formed in the lower left and upper right gusset plates 110 and 120, respectively. In this case, the lower left gusset plate 110, the upper right gusset plate 120, the ordinary bolts 115, 125, and the first brace 200 form the second structure 100. FIG.

Alternatively, only one of the lower mounting portion 210 and the upper mounting portion 220 of the first brace 200 may be provided with mounting holes, and only the corresponding lower left gusset plate 110 or upper right gusset plate 110 may be provided with elongated holes. At this time, it is preferable that the length of the long hole in the direction along the structural diagonal line L is approximately double the length in the mode in which the long holes are provided in both the lower mounting portion 210 and the upper mounting portion 220 .

Next, a third structure 300 according to a third embodiment of the invention will be described with reference to FIG. Unless otherwise described, in this embodiment, the same reference numerals are given to the same configurations as those in the first and second embodiments, and the description thereof will be omitted. This embodiment differs from the first and second embodiments in the configuration of the joint member and the brace member.

The third structure 300 mainly comprises a third brace (brace member) 350, a left lower gusset plate 310, splice plates 330a-330h and eight high strength bolts 315a-315h each. The lower left gusset plate 310 and the splice plates 330a-330h form joining members, and the high strength bolts 315a-315h form connecting members. The lower left gusset plate 310, the splice plates 330a-330h, and the high strength bolts 315a-315h are referred to as the lower left gusset plate 310 and the like. In the third structure 300, the beam-to-column joint 101ru is also provided with the upper right gusset plate 320, the splice plate 340, and the high-strength bolt 325, similarly to the beam-to-column joint 101lb. Since these structures are the same as those of the lower left gusset plate 310 and the like, description thereof will be omitted.

The lower left gusset plate 310 is formed by combining two steel plates 310d and 310e having a predetermined thickness so as to intersect each other, thereby having a cross-shaped cross section when viewed along the structural diagonal L. The two steel plates 310d and 310e forming the lower left gusset plate 310 have substantially the same thickness as the steel plates 351d and 351e of the lower cross-shaped plate 351 provided at the lower end of the third brace 350, which will be described later. The lower left gusset plate 310 forms a hexagon in front view by dropping the upper right corner of a rectangle. Each end surface formed by dropping the upper right corner is referred to as an inner upper end surface 310c. The inner end face 310i of the left lower gusset plate 310 may be provided with a flange. The dimensions of the flange are appropriately selected according to the yield strength required for the third structure 300 . The steel plates 310d and 310e are provided with a plurality of cylindrical circular holes 312 passing through them in the thickness direction. The bottom surface 310b of the left lower gusset plate 310 is welded to the lower beam 20b. Outer end face 310o of lower left gusset plate 310 is welded to left post 10l. As a result, the left lower gusset plate 310 is attached to the column-to-beam joint 101lb between the left column 10l and the lower beam 20b.

The number of circular holes 312 is determined according to the performance required of the third structure 300, and in this embodiment, four holes are arranged in one line, for a total of 16 holes. The circular hole 312 is provided so that its central axis is orthogonal to a straight line parallel to the structural diagonal line L. The distances between the central axes of the 16 circular holes 312 and the structural diagonal line L are equal. The diameter of the circular hole 312 is determined according to the performance required of the third structure 300, for example, the floor height of the story on which the third structure 300 is provided or the plastic deformation area of the building.

In the building where the third structure 300 is provided, the beam-to-column joints manufactured in advance at the factory are brought to the construction site and attached to the building. That is, the lower left gusset plate 310 and the upper right gusset plate 320 are also preliminarily welded to the joints between the left column 10l and the lower beam 20b and the joints between the right column 10r and the upper beam 20u at the factory, and are brought to the construction site. be. The lower left gusset plate 310 and upper right gusset plate 320 need not be welded to the column 10 and beam 20 at the construction site.

Next, the third brace 350 attached to the third structure 300 will be described. The third brace 350 is a so-called buckling restraint brace, which has a predetermined yield axial force against tensile and compressive forces in its axial direction, and functions as a damping member within its plastic deformation range. The third brace 350 is a shaft member extending linearly in its longitudinal direction, and has a lower cross-shaped plate 351 and an upper cross-shaped plate 352 at both ends. Note that the configuration of the upper cross-shaped plate 352 is the same as that of the lower cross-shaped plate 351, so the description thereof is omitted.

The lower cross-shaped plate 351 is formed by combining two steel plates 351d and 351e having a predetermined thickness so as to intersect each other, and thus has a cross-shaped cross section when viewed along the diagonal line L of the structure. The steel plates 351d and 351e are rectangular members having thickness, and have 16 elongated holes 353 extending through them in the thickness direction, extending from the lower end of the third brace 350 along its axial direction. The number of elongated holes 353 is determined according to the performance required of the third structure 300. In this embodiment, four holes are arranged in one row, for a total of 16 holes. The long hole 353 is provided so that its longitudinal direction is parallel to a straight line parallel to the structural diagonal L and its opening direction is orthogonal. The distances between the 16 long holes 353 and the structural diagonal line L are equal. The longitudinal length of the long hole 353 is determined according to the performance required of the third structure 300, for example, the floor height of the story on which the third structure 300 is provided or the plastic deformation area of the building.

In the lower cross-shaped plate 351, the front and back surfaces of the steel plate 351d, that is, the two surfaces perpendicular to the Y axis, and the upper and lower surfaces of the steel plate 351e, that is, the surface facing the positive Z-axis direction and the surface facing the negative Z-axis direction, It is processed to have a predetermined coefficient of friction with the splice plates 330a-330h. The coefficient of friction is preferably a relatively low value, for example, less than 0.45, or preferably 0.1 to 0.4, more preferably 0.15 to 0.35, further preferably 0.2 to 0. .35. Processing includes, for example, galvanizing, black scale (oxide film) processing, Shinmyotan coating, and polishing surface processing. Between the third brace 350, for example, a coefficient of friction of 0.1 to 0.3 is obtained by galvanizing, a coefficient of friction of 0.2 to 0.35 is obtained by black scale treatment, and Shinmyotan coating is applied. For example, a coefficient of friction of 0.15 to 0.25 can be obtained, and a coefficient of friction of 0.2 to 0.35 can be obtained in polished surface processing, for example.

The splice plates 330a to 330h are rectangular steel members having a thickness and are long enough to span the steel plates 310d and 310e of the lower left gusset plate 310 and the steel plates 351d and 351e of the lower cross-shaped plate 351. Splice plates 330a to 330h each have eight cylindrical holes 331 penetrating in the thickness direction. Two splice plates 330c, 330d sandwich the steel plate 310e of the lower left gusset plate 310 with their left half and the steel plate 351e of the lower cross plate 351 with their right half. The high-strength bolts 315e pass through the circular holes 312 of the lower left gusset plate 310 and the cylindrical holes 331 of the splice plates 330c and 330d to fasten the lower left gusset plate 310 and the splice plates 330c and 330d. On the other hand, the high-strength bolts 315e pass through the long holes 353 of the lower cross-shaped plate 351 and the cylindrical holes 331 of the splice plates 330c and 330d to fasten the lower cross-shaped plate 351 and the splice plates 330c and 330d. Similarly to splice plate 330c, splice plate 330a also has a steel plate 310d of lower left gusset plate 310 and a steel plate 351d of lower cross-shaped plate 351 between splice plate 330e (not shown) provided on the back side of splice plate 330a. are sandwiched therebetween and fastened by a high-strength bolt 315e.
The splice plate 330b also has a splice plate 330f (not shown) provided on the back side of the splice plate 330b. It is fastened with a bolt 315e. Similarly, the splice plates 330e and 330f (not shown) sandwich the steel plate 310e of the lower left gusset plate 310 and the steel plate 351e of the lower cross-shaped plate 351 therebetween, and are fastened with high-strength bolts 315e. In this way the third brace 350 is attached to the third structure 300 .

The surfaces of the splice plates 330a to 330h that come into contact with the steel plates 351d and 351e are processed so as to have a predetermined coefficient of friction with the steel plates 351d and 351e. The coefficient of friction is preferably a relatively low value, for example, less than 0.45, or preferably 0.1 to 0.4, more preferably 0.15 to 0.35, further preferably 0.2 to 0. .35. Processing includes, for example, galvanizing, black scale (oxide film) processing, Shinmyotan coating, and polishing surface processing. Between the third brace 350, for example, a coefficient of friction of 0.1 to 0.3 is obtained by galvanizing, a coefficient of friction of 0.2 to 0.35 is obtained by black scale treatment, and Shinmyotan coating is applied. For example, a coefficient of friction of 0.15 to 0.25 can be obtained, and a coefficient of friction of 0.2 to 0.35 can be obtained in polished surface processing, for example.

The movements of the third structure 300 and the third brace 350 are the same as in the first embodiment, and are shown in FIGS. 5 and 6, so the description is omitted.

According to this embodiment, the same effects as those of the first embodiment are obtained.

The splice plates 330a-330h, the upper right splice plate 340, the lower cross-shaped plate 351, and the upper cross-shaped plate 352 are not processed to reduce the coefficient of friction, and ordinary bolts are used instead of the high-strength bolts 315a-315i. may be used. The splice plates 330a to 330h, the lower cross plate 351 and the upper cross plate 352, and the splice plate 340 and the lower cross plate and the upper cross plate on the upper right side support the bearing pressure or shear strength of the ordinary bolt. Joined in expectation. When using normal bolts, the axial force is lower than when using high-strength bolts, so even without processing to lower the friction coefficient, the frictional force generated between each member is lower than when using high-strength bolts. lower.

In addition, although the mode in which the elongated holes 353 are provided in both the upper cross-shaped plate 352 and the lower cross-shaped plate 351 has been described, only one of the upper cross-shaped plate 352 and the lower cross-shaped plate 351 is provided with the elongated holes 353 . may At this time, the longitudinal length of the elongated holes 353 may be substantially doubled compared to the case where the elongated holes 353 are provided on both sides.

Although the upper cross-shaped plate 352 and the lower cross-shaped plate 351 are provided with the elongated holes 353, the upper cross-shaped plate 352 and the lower cross-shaped plate 351 are provided with circular through holes instead of the elongated holes 353. Slots 353 may be provided in both or either of lower left gusset plate 310 and upper right gusset plate 320 . In this case, the third structure 300 consists primarily of a lower left gusset plate 310, splice plates 330a-330h, and eight high strength bolts 315a-315i each. When only one of the long holes 353 is provided, the length in the longitudinal direction of the long hole 353 may be substantially doubled compared to the case where the long holes 353 are provided on both sides.

Next, a fourth structure 400 according to a fourth embodiment of the invention will be described with reference to FIG. Unless otherwise described, in this embodiment, the same reference numerals are given to the same configurations as those in the first to third embodiments, and the description thereof will be omitted. In this embodiment, the fourth braces (brace members) 450a and 450b are arranged in a K-shape, and the fourth braces 450a and 450b are joined to the fourth structure 400 by pin joints. different from the embodiment of In the K-type arrangement, gusset plates are provided in the lower left and right corners and in the middle of the upper beam, and fourth braces are provided between the gusset plates in the middle of the upper beam and the gusset plates provided in the lower left and right corners. 450a and 450b are arranged. Differences from other embodiments will be mainly described below.

The fourth structure 400 includes fourth braces 450a and 450b, a fourth lower left gusset plate 410, a fourth lower right gusset plate 430, and an upper middle gusset plate 420 which are joint members, and a joint member. It mainly comprises a lower left pin 415 , an upper left pin 425 , an upper right pin 427 and a lower right pin 435 .

Compared to the first embodiment, the fourth lower left gusset plate 410 and the fourth lower right gusset plate 430 have a profile similar to that of the first lower left gusset plate 110 and the first upper right gusset plate 120 . While substantially the same or symmetrical, they each have one circular hole 412, 432 rather than multiple oblong holes. The circular holes 412 and 432 pass through the fourth lower left gusset plate 410 and the fourth lower right gusset plate 430 in the thickness direction, that is, in the Y-axis direction. A fourth lower left gusset plate 410 is attached to the lower left beam-to-beam joint 101lb and a fourth lower right gusset plate 430 is attached to the lower right beam-to-beam joint 101rb.

The middle upper gusset plate 420 is a thick rectangular plate-like member, and forms a hexagon in front view by dropping the lower left and lower right corners in front view. Two circular holes 422l and 422r are provided near the lower left and lower right corners, penetrating through the middle upper gusset plate 420 in the thickness direction, that is, in the Y-axis direction.

The fourth brace 450a is a pin joint type brace and has two steel members 451 protruding parallel to each other from one end thereof. The two pieces of steel 451 have two coaxial oblong through-holes to extend the fourth lower left gusset plate 410, the fourth lower right gusset plate 430, and the middle upper gusset plate 420 approximately in their thickness direction. It has enough space to sandwich from both sides without any gap. The other end of fourth brace 450a is also provided with similar steel 451 . The width of the oval through hole is approximately the same as the diameter of the circular holes 412 and 432 . A lower left pin 415 or an upper left pin 425 passes through the oval through hole and circular hole 412 , thereby pinning the fourth brace 450 a to the fourth lower left gusset plate 410 and the upper middle gusset plate 420 . The fourth brace 450b also has a configuration similar to that of the fourth brace 450a, and the upper right pin 427 or the lower right pin 435 passes through the oval through hole and the circular hole 412, thereby providing the fourth brace 450b are pinned to the middle upper gusset plate 420 and the fourth lower right gusset plate 430;

The fourth brace 450a and the fourth lower left gusset plate 410 and the fourth lower right gusset plate 410 and the fourth lower right gusset plate 410 and the fourth brace 450a have two surfaces that contact each other. Two surfaces contacting each other at the gusset plate 430, two surfaces contacting each other at the fourth brace 450b and the middle upper gusset plate 420 and the fourth lower right gusset plate 430, the middle upper gusset plate 420 and the fourth The two mutually contacting surfaces of the lower right gusset plate 430 and the fourth brace 450b are machined to have a predetermined coefficient of friction between the contacting surfaces. The coefficient of friction is preferably a relatively low value, for example, less than 0.45, or preferably 0.1 to 0.4, more preferably 0.15 to 0.35, further preferably 0.2 to 0. .35. Processing includes, for example, galvanizing, black scale (oxide film) processing, Shinmyotan coating, and polishing surface processing. For example, galvanization provides a friction coefficient of 0.1 to 0.3, black scale treatment provides a friction coefficient of 0.2 to 0.35, and Shinmyotan coating provides a friction coefficient of 0.15 to 0.25. is obtained, and for example, a coefficient of friction of 0.2 to 0.35 can be obtained in polishing surface processing.

According to this embodiment, the same effects as those of the first embodiment are obtained.

In addition, although the mode in which the oblong through holes are provided at both ends of the fourth brace 450a and the fourth brace 450b has been described, the oblong through holes are provided only at one end of the fourth brace 450a and the fourth brace 450b. good too. At this time, the length in the longitudinal direction of the oblong through-hole may be approximately doubled compared to the case where the oblong through-holes are provided at both ends. The same is true for fourth brace 450b.

Although a mode in which the fourth brace 450a is provided with the oval through hole has been described, the fourth brace 450a is provided with the circular through hole instead of the oval through hole, and the fourth lower left gusset plate 410 and the upper middle gusset plate are provided. Both 420 or only one of them may be provided with oblong through-holes. In this case, the fourth structure 400 includes a fourth lower left gusset plate 410, a fourth lower right gusset plate 430, and an upper middle gusset plate 420, along with a lower left pin 415, an upper left pin 425, an upper right pin 427, and a right It is mainly composed of the lower pin 435 and the lower pin 435 . When the elliptical through-holes are provided in only one of them, the longitudinal length of the elliptical through-holes may be substantially doubled compared to the case where the elliptical through-holes are provided in both. The same is true for fourth brace 450b, fourth lower right gusset plate 430, and upper middle gusset plate 420.

Next, a fifth structure according to a fifth embodiment of the invention will be described with reference to FIGS. 1 and 11. FIG. In this embodiment, the same components as in the first to fourth embodiments are denoted by the same reference numerals, and descriptions thereof are omitted. Compared to the first embodiment, in this embodiment, both of the two gusset plates are not provided with slotted holes, only one is provided with slotted holes, and the other is provided with circular holes. , and the longitudinal length of the long hole is doubled, but other configurations are the same. Before the fifth structure is deformed, that is, before the upper beam 20u is displaced left and right in FIG. 4, the high-strength bolts 115, 125 are pre-placed longitudinally centrally within the slots 112, 122. As shown in FIG.

First, referring to FIGS. 11A1 to 11C1, the long hole 112 is provided only in the lower left gusset plate 110, and the upper beam 20u is displaced leftward in FIG. A mode in which the force acts will be described.

At the time of installation, the high-strength bolt 115 is placed in advance in the center in the longitudinal direction within the long hole 112 (see FIG. 11(A1)). Here, as described above, the lower mounting portion 210 and the lower left gusset plate 110 are friction bonded. Therefore, when the force applied by the seismic force is smaller than the frictional force between the lower mounting portion 210 and the lower left gusset plate 110, the fifth structure is slightly deformed, but the lower mounting portion 210 and the lower left gusset plate 110 are separated from each other. The plates 110 are frictionally secured together such that the first brace 200 resists compressive forces. While the lower mounting portion 210 and the left lower gusset plate 110 are fixed to each other by frictional force, in other words, the high-strength bolt 115 moves downward in the long hole 112 in the gravitational direction due to the axial force exceeding the frictional force from the stationary state. Period A is the period up to the time when it starts to do so.

When the axial force due to deformation exceeds the frictional force, the high-strength bolt 115 begins to move downward from the center in the longitudinal direction within the long hole 112, and then the high-strength bolt 115 moves downward in the gravitational direction in the long hole 112. It collides (see FIG. 11(B1)). A period B is a period from when the high-strength bolt 115 starts moving from the center in the longitudinal direction of the long hole 112 until it hits downward in the direction of gravity. During period B, the high-strength bolt 115 only moves within the long hole 112, and the same compressive force as in period A continues to act on the first brace 200, but the compressive force is no change.

When the upper beam 20u continues to be displaced while the high-strength bolt 115 abuts the long hole 112 downward in the direction of gravity, further compressive force is applied from the left lower gusset plate 110 and the upper right gusset plate 120 to the first brace 200. . Then, when the compressive force continues to be applied and the yield axial force of the first brace 200 is exceeded, the first brace 200 yields. A period C is a period from when the high-strength bolt 115 hits the elongated hole 112 downward in the direction of gravity, that is, when the compressive force starts to act on the first brace 200 until the first brace 200 yields. . A period D is a period after the first brace 200 yields.

Next, a case where the upper beam 20u is displaced to the right in FIG. 1 and a tensile force acts on the first brace 200 will be described.

At the time of installation, the high-strength bolt 115 is placed in advance in the center in the longitudinal direction within the long hole 112 (see FIG. 11(A1)). Here, as described above, the lower mounting portion 210 and the lower left gusset plate 110 are friction bonded. Therefore, when the force applied by the seismic force is smaller than the frictional force between the lower mounting portion 210 and the lower left gusset plate 110, the fifth structure is slightly deformed, but the lower mounting portion 210 and the lower left gusset plate 110 are separated from each other. The plates 110 are fixed together by frictional forces such that the first brace 200 resists tensile forces. The period during which the lower mounting portion 210 and the left lower gusset plate 110 are fixed to each other by frictional force, in other words, the axial force exceeds the frictional force from the stationary state, and the high-strength bolt 115 is elongated in the elongated hole 112, which will be described later. The period A is the period from the center of the direction to the time when it starts to move upward.

Then, when the axial force due to deformation exceeds the frictional force, the high-strength bolt 115 begins to move upward from the center in the longitudinal direction, after which the high-strength bolt 115 hits the long hole 112 upward in the gravitational direction (Fig. 11 ( C1)). A period B is a period from when the high-strength bolt 115 starts to move from the bottom in the direction of gravity to when it hits the top in the direction of gravity in the elongated hole 112 . During the period B, the high-strength bolt 115 only moves within the long hole 112, and the same tensile force as in the period A continues to act on the first brace 200, but the tensile force no change.

When the upper beam 20u continues to be displaced while the high-strength bolt 115 abuts the long hole 112 upward in the gravity direction, a tensile force is further applied to the first brace 200 from the left lower gusset plate 110 and the upper right gusset plate 120. . Then, when the tensile force continues to be applied and exceeds the yield axial force of the first brace 200, the first brace 200 yields. A period C is a period from when the high-strength bolt 115 hits the long hole 112 upwardly due to gravity, that is, when a tensile force starts to act on the first brace 200 until the first brace 200 yields. A period D is a period after the first brace 200 yields.

Next, referring to FIGS. 11A2 to 11C2, a long hole 122 is provided only in the upper right gusset plate 120, and the upper beam 20u is displaced leftward in FIG. A mode in which the compressive force acts will be described.

At the time of installation, the high-strength bolt 125 is placed in advance in the center in the longitudinal direction within the long hole 122 (see FIG. 11(A2)). Here, as described above, the upper mounting portion 220 and the upper right gusset plate 120 are friction-bonded. Therefore, when the force applied by the seismic force is smaller than the frictional force between the upper mounting portion 220 and the upper right gusset plate 120, the fifth structure is slightly deformed, but the upper mounting portion 220 and the upper right gusset plate 120 are separated from each other. The plates 120 are frictionally secured together such that the first brace 200 resists compressive forces. While the upper mounting portion 220 and the upper right gusset plate 120 are fixed to each other by frictional force, in other words, the high-strength bolt 125 moves upward in the long hole 122 in the gravitational direction due to the axial force exceeding the frictional force from the stationary state. Period A is the period up to the time when it starts to do so.

Then, when the axial force due to deformation exceeds the frictional force, the high-strength bolt 125 begins to move upward from the center in the longitudinal direction within the long hole 122, and then the high-strength bolt 125 moves upward in the gravitational direction in the long hole 122. It collides (see FIG. 11(B2)). A period B is a period from when the high-strength bolt 125 starts moving from the center in the longitudinal direction of the long hole 122 until it strikes upward in the direction of gravity. During period B, the high-strength bolt 125 only moves within the long hole 122, and the same compressive force as during period A continues to act on the first brace 200, but the compressive force is no change.

If the upper beam 20u continues to be displaced while the high-strength bolt 125 abuts the long hole 122 upward in the direction of gravity, further compressive force is applied from the left lower gusset plate 110 and the upper right gusset plate 120 to the first brace 200. . Then, when the compressive force continues to be applied and the yield axial force of the first brace 200 is exceeded, the first brace 200 yields. A period C is a period from when the high-strength bolt 125 hits the elongated hole 122 upward in the gravity direction, that is, when the compressive force starts to act on the first brace 200, until the first brace 200 yields. . A period D is a period after the first brace 200 yields.

A case in which the upper beam 20u is displaced to the right in FIG. 1 and a tensile force acts on the first brace 200 will be described.

At the time of installation, the high-strength bolt 125 is placed in advance in the center in the longitudinal direction within the long hole 122 (see FIG. 11(A2)). Here, as described above, the upper mounting portion 220 and the upper right gusset plate 120 are friction-bonded. Therefore, when the force applied by the seismic force is smaller than the frictional force between the upper mounting portion 220 and the upper right gusset plate 120, the fifth structure is slightly deformed, but the upper mounting portion 220 and the upper right gusset plate 120 are separated from each other. The plates 120 are frictionally fixed together so that the first brace 200 resists tensile forces. During the period in which the upper mounting portion 220 and the upper right gusset plate 120 are fixed to each other by frictional force, in other words, the high-strength bolt 125 moves upward from the center in the longitudinal direction in the elongated hole 122 when the axial force exceeds the frictional force from the stationary state. Period A is the period up to the time when it begins to move to .

Then, when the axial force due to the deformation exceeds the frictional force, the high-strength bolt 125 begins to move downward from the center in the longitudinal direction, and then hits the long hole 122 downward in the gravitational direction (Fig. 11 ( C2)). A period B is a period from when the high-strength bolt 125 starts moving downward in the gravitational direction in the elongated hole 122 until it strikes downward in the gravitational direction. During the period B, the high-strength bolt 115 only moves within the long hole 112, and the same tensile force as in the period A continues to act on the first brace 200, but the tensile force no change.

When the upper beam 20u continues to be displaced while the high-strength bolt 125 abuts the long hole 122 downward in the direction of gravity, a tensile force is further applied to the first brace 200 from the left lower gusset plate 110 and the upper right gusset plate 120. . Then, when the tensile force continues to be applied and exceeds the yield axial force of the first brace 200, the first brace 200 yields. A period C is a period from when the high-strength bolt 125 hits the long hole 122 downward due to gravity, that is, when a tensile force begins to act on the first brace 200 until the first brace 200 yields. Thus, the fifth structure functions similarly to the first structure 100 according to the first embodiment.

According to this embodiment, the same effects as those of the first embodiment can be obtained only by making one of the gusset plates elongated.

It should be noted that the length of the elongated hole in the longitudinal direction may not be double that of the first embodiment, and may be appropriately determined according to the design criteria.

In any of the embodiments, the shape of the elongated hole 112 in front view is not limited to an oval, and may be a rectangular hole or an elliptical hole in which the high-strength bolts and the ordinary bolts 115 and 125 are aligned along the structural diagonal L. Any shape can be used as long as it can move inside. Further, the position, size, and number of the long axes are not limited to those described above, and may be appropriately determined according to the required strength or the mounting structure of the brace.

The arrangement of attaching the brace to the structure is not limited to the one-way arrangement, and may be any arrangement such as a V-shaped arrangement or a K-shaped arrangement, as long as the brace functions effectively. In the V-shaped arrangement, gusset plates are provided in the upper left and right corners and in the middle of the lower beam, and braces are arranged between the gusset plates in the middle of the lower beam and the gusset plates provided in the upper left and right corners. It is. In the K-shaped arrangement, the braces of the V-shaped arrangement are arranged symmetrically with respect to the XY plane. A brace is placed between each of the gusset plates provided at the left and right lower corners. Furthermore, the arrangement may be such that anti-buckling steels are arranged at the left and right lower corners (or left and right upper corners) from the middle of the brace.

In any embodiment, braces other than buckling restraint braces may be used as braces.

In each of the embodiments, both the gusset plate and the brace are processed to have a predetermined coefficient of friction, but either one of them may be processed instead of both.

In any embodiment, the columns 10 are not limited to square steel pipes, and the beams 20 are not limited to H steel. These types and numbers are examples, and are not limited to those described above, and other types and numbers may be adopted.

Note that the size and number of each member shown in this specification and drawings are examples, and the size and number are not limited to these. In addition, the materials of each member are examples and are not limited to these materials.

Although embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art will appreciate that changes may be made in the structure and relationship of parts without departing from the scope and spirit of the invention as described. is self-evident for

10 Column 10r Right Column 10l Left Column 20 Beam 20u Upper Beam 20b Lower Beam 100 First Structure 101ru Column-Beam Joint 101lb Column-Beam Joint 110 Left Lower Gusset Plate 110a Outer Lower End Face 110b Bottom 110c Inner Upper End Face 110i Inner End Face 110o Outer end surface 111 flange 112 long hole 115 high-strength bolt 120 upper right gusset plate 125 high-strength bolt 200 first brace 210 lower mounting portion 211 plate-like member 212 plate-like member 211a mounting hole 212a mounting hole 220 upper mounting portion 221 plate-like member 222 Plate-like member 221a Mounting hole 222a Mounting hole

Claims (11)

a joining member having a long hole provided at a column-to-beam joint located diagonally in a rectangular structure composed of a column and a beam;
a connecting member for connecting a brace member having first through holes at both ends to the connecting member;
The connecting member penetrates the first through hole and the elongated hole to connect the connecting member and the brace member. a joining member provided at a column-to-beam joint located diagonally in a rectangular structure composed of a column and a beam and having a second through hole;
a brace member having first through holes at both ends;
a connecting member that connects the brace member to the joint member;
at least one of the second through hole and the first through hole is an elongated hole;
The connecting member penetrates the second through hole and the first through hole, and connects the connecting member and the brace member. The structure according to claim 1 or 2, wherein there are a plurality of said long holes, and the long axis of said long hole is parallel to a straight line connecting diagonally positioned column-to-beam joints. 3. The structure according to claim 1 or 2, wherein there is one elongated hole and is pin-connected to the brace member, and the long axis of the elongated hole is parallel to a straight line connecting diagonally positioned beam-to-column joints. body. 5. The structure according to any one of claims 1 to 4, wherein the longitudinal length of said long hole is determined based on an elastic deformation region of a building in which said structure is provided. 6. The structure according to any one of claims 1 to 5, wherein the connecting member is a high-strength bolt, and the friction coefficient of the surfaces of the joining member and the brace member that contact each other is less than 0.45. 6. The structure according to any one of claims 1 to 5, wherein the connecting members are ordinary bolts, and the joint members and the brace members are joined by bearing pressure resistance or shear resistance of the ordinary bolts. A structure according to any one of claims 1 to 5 and 7, wherein said connecting members are conventional bolts. The brace member includes two plate-like members extending parallel to each other at both ends thereof, and the first through-hole is provided to penetrate the two plate-like members. 9. The structure according to any one of claims 1 to 8, wherein said joining member is inserted between. columns and beams forming a rectangular structure;
a joining member provided at a column-to-beam joint located diagonally in the rectangular structure and having a long hole;
a brace member having first through holes at both ends;
A building comprising a connecting member passing through the first through hole and the long hole and connecting the connecting member and the brace member. columns and beams forming a rectangular structure;
a joint member provided at a column-to-beam joint located diagonally in the rectangular structure and having a second through hole;
a brace member having first through holes at both ends;
a connecting member that connects the brace member to the joint member;
at least one of the second through hole and the first through hole is an elongated hole;
The connecting member penetrates the second through hole and the first through hole and connects the connecting member and the brace member.

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