WO2010103842A1 - 連結金物、制振構造、及び建築構造物 - Google Patents
連結金物、制振構造、及び建築構造物 Download PDFInfo
- Publication number
- WO2010103842A1 WO2010103842A1 PCT/JP2010/001759 JP2010001759W WO2010103842A1 WO 2010103842 A1 WO2010103842 A1 WO 2010103842A1 JP 2010001759 W JP2010001759 W JP 2010001759W WO 2010103842 A1 WO2010103842 A1 WO 2010103842A1
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- steel
- plate
- target members
- hardware
- steel pipe
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/0237—Structural braces with damping devices
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/028—Earthquake withstanding shelters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/45—Flexibly connected rigid members
Definitions
- the present invention employs a coupling hardware connected between a pair of target members and exhibiting energy absorption performance according to relative displacement between the target members, a vibration damping structure using the coupling hardware, and the vibration damping structure.
- a coupling hardware connected between a pair of target members and exhibiting energy absorption performance according to relative displacement between the target members, a vibration damping structure using the coupling hardware, and the vibration damping structure.
- a vibration control structure that suppresses vibration during earthquakes with vibration control dampers.
- a damping damper in this type of damping structure for example, a steel damper that uses hysteresis energy that accompanies the yield of steel can be used in many building structures because it can exhibit high damping performance at low cost.
- brace dampers that resist axial force are the most popular because they have a simple mechanism and are easy to handle in terms of design.
- a vibration damping structure in which a base plate damper is interposed between a column leg and a foundation is proposed.
- This base plate can exhibit a damping function by bending or shear yielding when tensile force is applied to the column and absorbing the tensile force generated at the column base by the hysteresis energy.
- Patent Document 2 discloses a technique that can suppress an increase in shear strength even when a damper steel plate is subjected to repeated loads after the yielding of the damper steel plate by adopting a bending-shear yielding steel plate. It is disclosed.
- the thickness of the steel plate used as the damping damper is increased from the viewpoint of improving the in-plane and out-of-plane rigidity and improving the buckling prevention property, it is necessary to increase the weight when connecting and assembling. There arises a problem that the workability in the process deteriorates or the material cost increases. In addition, in order to ensure the absorption of vibration energy, it is necessary to increase the shape of the damper part. However, there is a problem that it becomes a barrier to realizing both miniaturization and ensuring high energy absorption performance. there were.
- a damping damper that absorbs vibration energy by contracting the folded plate has been proposed in the past.
- the shape is bent in the in-plane direction or the out-of-plane direction of the shaft assembly, and the displacement is changed by deforming in the in-plane direction or out-of-plane direction of the shaft assembly.
- Absorbing damping devices have been proposed.
- Patent Document 4 discloses a honeycomb structure in which Zn-Al-based alloy plate members provided opposite to each other and separated from each other are divided into a plurality of spaces by a Zn-Al-based alloy-made corrugated plate-like partition plate. The technology which constructed
- Patent Document 4 since the disclosed technique of Patent Document 4 does not assume energy absorption due to plastic deformation of the partition plate itself, it cannot absorb large energy due to a large earthquake.
- the vibration that is the target of energy absorption in this disclosed technology is a relatively small daily vibration such as a footstep of a resident. Although such a life vibration can be suppressed by the elastic deformation and damping effect of the partition plate, a large vibration such as a seismic motion cannot be suppressed in the first place. That is, this patent document 4 does not assume energy absorption based on earthquake motions.
- the present invention has been devised in view of the various problems described above, and its object is to connect between a pair of target members and exhibit energy absorption performance according to the relative displacement between these target members.
- the inventor has invented a metal joint that is joined between a pair of upper and lower target members and that exhibits energy absorption performance according to a horizontal relative displacement between the target members.
- crests and troughs are alternately formed along the first direction, and a web part is formed between the crests and troughs.
- a peak part is joined to one object member, a valley part is joined to the other object member.
- an energy absorption performance is exhibited by carrying out plastic deformation of the web part according to the relative displacement between each object member to the 2nd direction.
- one of the purposes is to reduce the yield stress.
- the shape of the slit may be optimized so that bending and shearing can be yielded simultaneously.
- the amount of energy absorption can be increased by further increasing the amount of plastic deformation of the web portion with the formation of the slit.
- an increase in yield strength after yielding of the web portion can be suppressed, and damage to the periphery (mountains and valleys) can be prevented.
- the behavior of plastic deformation is limited to the in-plane of the web portion, so that unstable behavior can be avoided.
- the present inventors have invented a vibration damping structure that exhibits energy absorption performance in accordance with the relative displacement between brace main members that are target members.
- this vibration damping structure a pair of the brace main materials that can be attached to a building structure, and peaks and valleys are formed alternately along the first direction, and between these peaks and valleys And a connecting hardware having a web portion formed thereon. And while attaching the said peak part to one object member, the said trough part is attached to the other object member. And it is possible to exhibit energy absorption performance by carrying out plastic deformation of the web part according to the relative displacement between each object member along the 2nd direction.
- connection hardware shown in the following aspect
- a vibration control structure including the connection hardware, and a building to which the vibration control structure is applied. Invented the structure.
- the connecting hardware of the present invention connects a pair of target members that are relatively displaceable along one direction, and includes a plurality of first mounting portions that are attached to one of the target members.
- a second attachment portion attached to the other of the target members; and a plurality of plate portions connecting the first attachment portions and the second attachment portions;
- An attachment direction of one attachment portion and an attachment direction of the second attachment portion with respect to the other target member are set so that the surface of the plate portion follows the direction of the relative displacement.
- connection metal fitting described in (1) above, even if the first mounting portion, the plate portion, and the second mounting portion are folded plates including a mountain and valley portion formed continuously in this order. Good.
- the sum of the yield strengths of the plate portions may be lower than any of the yield strengths of the target members.
- connection hardware (4)
- a hole penetrating along the plate thickness direction may be formed in each plate portion.
- connection metal fitting described in (4) above, a plurality of the holes are formed along the direction of the relative displacement; a constriction is formed at a portion between the holes; .
- a vibration damping structure of the present invention comprises a pair of target members that form part of a building structure and are relatively displaceable along one direction; and (1) to (5) above that connect these target members A connected hardware according to any one of the above.
- one of the target members is an H-shaped steel; the other of the target members is a steel pipe or a light channel steel; and each of the first attachment portions May be attached to the web portion of the H-shaped steel; the second attachment portion may be attached to the steel pipe or the light channel steel;
- the lower end of the steel pipe or the light groove steel is fixed to the ground;
- the H-shaped steel is a column body;
- the building structure of this invention is equipped with the damping structure as described in said (6).
- the building structure described in (9) above may be a thin and light-weight steel structure.
- each plate portion When a pair of target members are connected using the connecting hardware described in (1) above and a relative displacement occurs between the target members, each plate portion is plastically deformed along the direction of the relative displacement. By this plastic deformation, each plate portion exhibits a stable energy absorption performance in which an increase in yield strength is suppressed. As a result, it is possible to exhibit a vibration damping function that suppresses relative displacement between the target members. And since each object member will be connected via the several board part, rigidity can be improved compared with the case of one board part. More specifically, each plate portion is separated by the first attachment portion and the second attachment portion along their edges along the relative displacement direction (that is, between each plate portion and the first attachment portion and the second attachment portion). Both edges to be formed) are in a restrained state.
- each plate portion can be reliably plastically deformed along the direction of relative displacement, so that energy can be absorbed more stably. Is possible.
- this connection hardware is used for connection between target members that are part of a building structure, it is possible to improve the vibration energy absorption performance associated with earthquakes and the like and improve the rigidity. .
- the connecting hardware is composed of folded plates
- one folded plate reciprocates between these target members many times. Therefore, the number of plate portions interposed between the target members can be increased.
- a structure in which a large number of connecting hardwares are arranged between the target members can be obtained. Therefore, even with a single connected hardware, the relative displacement energy generated between each target member can be absorbed by a large number of plate parts, so that the efficiency of absorbing relative displacement energy is increased compared to the conventional structure, and it is earthquake resistant. The performance can be further improved.
- each plate portion has not only the bending rigidity (in-plane bending rigidity) in the direction of arrow R1 shown in FIG. 5 described later, but also the bending rigidity (out-of-plane bending rigidity) in the direction of arrow R2 in FIG. ing.
- each plate portion has not only the torsional rigidity in the direction of arrow N1 shown in FIG. 5 but also the torsional rigidity in the direction of arrow N2 in FIG. Therefore, unstable phenomena such as bending buckling and torsional buckling in each plate portion can be suppressed.
- by connecting a single steel plate it is possible to manufacture a metal fitting that is a single folded plate, which eliminates the need to connect multiple plate parts by welding, etc. It becomes possible to do.
- the peripheral part of the hole since the rigidity of the peripheral part of the hole can be weaker than the rigidity of the continuous part between the first mounting part and the second mounting part and the plate part, the peripheral part of the hole is given priority. It can be plastically deformed to exhibit energy absorption performance. As a result, the reaction force acting on the continuous portion can be kept small. In addition, since the plate portions are easily plastically deformed by forming the holes, the rigidity and the proof stress required for each target member that receives the reaction force when the plate portions are plastically deformed can be reduced. As a result, it becomes possible to contribute to thinning and miniaturization of these target members.
- the degree of fixation per one plate portion (the degree of rigidity and proof strength of the target member with respect to the rigidity and proof strength of one plate portion) can be increased.
- the deformation of the target member is suppressed and the rigidity of the entire damper composed of each plate portion can be increased, so that the energy absorption performance of each plate portion can be improved.
- FIG. 8 is a view showing a modification of the embodiment of FIG. 7, and is a cross-sectional view taken along the line CC of FIG. 7. It is a front view which shows the other example of the damping structure of this invention. It is an enlarged view which shows the detail of the damping structure.
- FIG. 10B is a DD cross-sectional view of FIG. 10A. It is a perspective view which shows the detailed structure of the connection metal fitting which concerns on 2nd Embodiment of this invention.
- connection metal fitting It is a perspective view of the damping structure using the connection metal fitting. It is sectional drawing at the time of seeing the damping structure in the cross section perpendicular
- a coupling hardware of the present invention that is connected between a pair of target members and exhibits energy absorption performance according to the relative displacement between the target members, a damping structure using the coupling hardware, and the damping structure are adopted.
- FIG. 1 is a front view showing a framework of a building structure 1 in which a vibration damper 10 according to a first embodiment of the vibration damping structure of the present invention is disposed.
- the building structure 1 includes a plurality of steel pipe columns 2 and a plurality of beam members 3 connected between the steel pipe columns 2.
- Each steel pipe column 2 includes a steel pipe 21 having a square frame shape and a predetermined plate thickness when viewed in a cross section perpendicular to the longitudinal direction thereof, and a column beam connecting portion having a plate thickness thicker than the steel pipe 21. 22.
- Each column beam connection part 22 is connected along the vertical direction by welding from the outside in a state where it abuts against the upper and lower ends of the steel pipe 21.
- the outer periphery shape and the outer periphery curvature in each corner part are formed by hot forming.
- Each steel pipe column 2 plays a role of preventing the collapse and collapse of the steel structure 1 while supporting the weight of the steel structure 1 even when a large shaking occurs due to a large earthquake. From the viewpoint of preventing the steel pipe column 2 from yielding first when a large stress acts due to a large earthquake or the like, the deformation of the steel tube column 2 is particularly improved by providing a vibration damper (damping structure) 10 described later. Designed to keep the amount small.
- Each beam member 3 is a so-called H-shaped steel including a web portion 31 extending in the horizontal direction and a pair of flange portions 32 a and 32 b provided along upper and lower edges of the web portion 31.
- This beam material 3 is manufactured by rolling, for example.
- this beam material 3 is not limited only to what is called H-section steel, You may be comprised by shapes other than this.
- Each beam member 3 is integrated with the column beam connecting portion 22 by welding in a state where each end surface 3a is in contact with the outer surface of the corresponding steel pipe column 2, that is, the outer surface of the column beam connecting portion 22. Has been. As a result, the beam member 3 is rigidly joined to the column beam connecting portion 22 to form a steel frame ramen structure.
- FIG. 1 shows a part of a steel frame ramen structure in which each steel pipe column 2 and each beam member 3 are connected while being orthogonal to each other.
- a connecting member 25 is provided upward at each intersection of the beam member 3 and the steel pipe columns 2 on both sides thereof.
- a connecting member 26 is provided downward in the center of the lower portion of the other beam member 3.
- the damping damper 10 of this embodiment has one end attached to the connecting member 25 so as to be swingable, and the other end attached to the connecting member 26 so as to be swingable.
- the vibration damping damper 10 includes two brace main members 41a and 41b including a target member and a vibration damping portion 42.
- One end of the damping part 42 is attached to the brace main material 41a, while the other end is attached to the brace main material 41b.
- the brace main member 41a attached to one of the connecting members 25 is attached to the brace main member 41b attached to the other connecting member 26 via the vibration damping portion 42.
- these brace main materials 41a and 41b and the damping part 42 are coaxially arrange
- FIG. 2A is an enlarged view of a part A in FIG.
- FIG. 2B is a cross-sectional view taken along the line BB of FIG. 2A.
- the vibration control part 42 one end of the brace main material 41 a and one end of the brace main material 41 b are in contact with each other via one steel pipe 43 having a rectangular cross section and four connection hardware 6.
- FIG. 3 is an exploded perspective view for explaining the assembly of the vibration damping portion 42
- FIG. 4 is a perspective view showing a part of the connecting hardware 6.
- each of the brace main members 41a and 41b includes a web portion 52 extending along one direction and a pair of integrally provided along the upper and lower edges of the web portion 52. It is what is called a H-shaped steel provided with the flange parts 51a and 51b.
- Each connecting hardware 6 includes a plurality of (two in the illustrated example) peak portions 61 and a plurality of (two in the illustrated example) valleys formed by alternately forming one rectangular steel plate along the longitudinal direction D1.
- Part 62 More specifically, the peak portion 61 and the valley portion 62 are formed by a so-called bending process in which the steel sheet is alternately bent substantially vertically along the longitudinal direction D1. Further, a web part (plate part) 63 is continuously formed between the peak part 61 and the valley part 62.
- Each ridge 61 of the connecting metal fitting 6 is attached to the web portion 52 by a plurality of bolt screws 57, while each trough 62 is attached to the steel pipe 43 by a plurality of bolt screws 56.
- each peak 61 and each valley 62 of the connection hardware 6 is attached to the target member.
- the object member said by this invention means the attachment object of this connection metal fitting 6, If the vibration suppression part 42 of this embodiment is mentioned as an example, the web part 52 to which the peak part 61 is attached, Each of the steel pipes 43 to which the troughs 62 are attached is a target member.
- each web portion 63 of the connecting hardware 6 is formed with one or more (5 in the illustrated example) slit holes (holes) 65.
- These slit holes 65 are arranged at equal intervals on the web portion 63 at least along the direction perpendicular to the longitudinal direction D1 (that is, along the axial direction E of the brace main members 41a and 41b).
- the arrangement of the slit holes 65 is not limited to a single line in the drawing, and may be a plurality of lines, and is not limited to the case where the slit holes 65 are regularly arranged, and may be randomly scattered. Good.
- the slit hole 65 may have any shape, but is at least orthogonal to the axial direction of the target member and along the F direction that is substantially normal to the surface of the target member (web portion 52, steel pipe 43). A vertically long shape is desirable. Moreover, in the example of FIG. 4, although the case where the rhombus-shaped slit hole 65 is employ
- each web portion 63 By forming the slit hole 65 in each web part 63, the yield strength of these web parts 63 can be lowered. Specifically, a stress ⁇ E is applied between the target members (web portion 52, steel pipe 43) along the axial direction E, and the axial direction E is applied between these target members (web portion 52, steel pipe 43). When a relative displacement occurs along the web direction 63, each web portion 63 can be easily bent and yielded along the axial direction E. As shown in FIG. 6, the bending yield is preferentially formed in the region 63a between the slit holes 65 adjacent to each other, since the constriction with the smallest width dimension along the member axial direction E is formed. It is easy to surrender.
- each slit hole 65 in each web part 63 it is not essential to form each slit hole 65 in each web part 63, for example, as shown in FIG. 5, you may employ
- the sum of the yield stress of each web part 63 is larger than the yield stress of each target member (web part 52, steel pipe 43), similarly to the purpose of providing each slit hole 65.
- the material, shape, etc. need to be optimized so as to be low.
- the connecting hardware 6 configured as described above is provided between the brace main material 41a and the steel pipe 43 and between the brace main material 41b and the steel pipe 43, respectively. As a result, the stress transmission path is transmitted in the order of the brace main material 41a, the connecting hardware 6, the steel pipe 43, the other connecting hardware 6, and the brace main material 41b (or the reverse order).
- each web portion 63 can be bent and yielded earlier than other places. As a result, it is possible to exhibit a stable deformation energy absorption performance in a state in which each web portion 63 is plastically deformed and the increase in the yield strength is suppressed. And since this connection metal fitting 6 exhibits the energy absorption performance according to the relative displacement between each object member, also as the damping damper 10 whole, between the brace main material 41a and the steel pipe 43, and the steel pipe 43 and the brace main material. Energy absorption performance can be exhibited at two locations between 41b. That is, the vibration damping function of the vibration damper 10 in the building structure 1 can be exhibited.
- the connecting hardware 6 of the present embodiment has a folded plate structure, and has a shape in which a plurality of web portions 63 are formed by reciprocating between the target members (web portion 52, steel pipe 43) many times. Yes. For this reason, the arrangement density of the web part 63 between each object member (web part 52, the steel pipe 43) can be raised, and many web parts 63 are arrange
- the clearance gap between each object member (web part 52, the steel pipe 43) is generally narrow, it has been a big problem from the past how to arrange
- the folded metal plate-like connecting hardware 6 is disposed in the gap and the yield strength of each web portion 63 is reduced. Therefore, the web portions 63 are arranged in multiple rows in a narrow gap. It can be arranged over. As a result, it is possible to downsize the vibration damping portion 42 and thus the vibration damping damper 10 itself.
- connection metal fitting 6 of this embodiment employs a folded plate structure and increases the arrangement density of the web portions 63 between the target members (web portion 52, steel pipe 43), the rigidity thereof is improved.
- the buckling prevention performance can be improved. That is, the connecting hardware 6 of the present embodiment can improve energy absorption performance and rigidity.
- the configuration of the present invention is also advantageous in that the size can be reduced. .
- the connecting hardware 6 of the present embodiment is manufactured through so-called folded plate processing in which a single steel plate is bent and processed. For this reason, it is not necessary to perform welding, screw connection, bolt connection, or the like for connecting the steel plates between the steel plates when manufacturing the connecting hardware 6, and thus improve the ease of manufacturing the vibration damper 10. It becomes possible.
- connection metal fitting 6 in which each peak part 61 and each trough part 62 were formed by alternately bending the steel plate so as to reciprocate along the direction perpendicular to the longitudinal direction thereof was exemplified. And the case where the said bending angle was bent so that it might become substantially perpendicular
- the present invention is not limited to this configuration.
- the bending angle at the time of forming each peak 61 and each valley 62 is not limited to 90 degrees, and it may be bent at other angles. Good.
- FIG. 7 shows an application example when the brace main material 41 made of H-shaped steel constituting the vibration damper 10 is a column material and the lower end thereof is fixed to the ground surface.
- a steel pipe 43 is attached to the lower end of the brace main material 41 via a connecting hardware 6 joined to the web portion 52.
- the steel pipe 43 is fixed to the base plate 49.
- the base plate 49 is fixed to the ground Ea by a plurality of bolts 50.
- the configuration of the damping damper 10 in the CC section of FIG. 7 is the same as the configuration of FIG. 2B described above, and therefore, the same components and members are referred to by the same reference numerals and detailed description thereof is omitted.
- a tensile stress is applied to the brace collecting material 41 in the G direction in FIG. 7, a relative displacement occurs between each target member (web portion 52, steel pipe 43).
- the connecting hardware 6 can be plastically deformed to exhibit energy absorption performance. As a result, it is possible to reduce the vibration of the brace main material 41 as the column material, and it is also possible to improve the rigidity as described above.
- FIG. 8 shows a cross-sectional configuration in the case where a brace main material 41 made of an H-shaped steel constituting the vibration damper 10 is used as a column and a grooved steel 43 ′ is connected instead of the steel pipe 43 shown in FIG. An example is shown.
- the same components and members as those in FIG. 2B described above are referred to by the same reference numerals, and redundant description is omitted.
- two channel steels 43 ′ are arranged such that these U-shaped opening portions face each other.
- each valley portion 62 in the connection hardware 6 is formed as the U of the groove steel 43 ′.
- a plurality of bolt screws 56 are joined to the inner surface portion of the letter shape.
- FIG. 9 shows another vibration damping damper 80 disposed in the building structure 1.
- Connection members 81 and 82 are provided at the intersections of the steel pipe columns 2 and the beam members 3 in the building structure 1, respectively.
- the vibration damping damper 80 has one end attached to the connecting member 81 and the other end attached to the connecting member 82.
- the vibration damper 80 includes two brace main members 83a and 83b, which are target members, and a vibration damping portion 84.
- One end of the damping part 84 is attached to the brace main member 83a, and the other end is attached to the brace collecting member 83b.
- the brace main material 83a is attached to the brace main material 83b via the vibration damping portion 84.
- These brace main materials 83a and 83b are both shaped steel having a T-shaped cross section.
- the brace main material 83a is a T-shaped steel including a web portion 85a extending along one direction and a flange portion 86a provided along one edge of the web portion 85a.
- the brace main material 83b is a T-shaped steel including a web portion 85b extending along one direction and a flange portion 86b provided along one edge of the web portion 85b.
- the connecting hardware 6 includes a plurality of (two in the illustrated example) peak portions 61 and a plurality (two in the illustrated example) trough portions 62 in which one steel plate is alternately formed along the longitudinal direction H. It has. A web portion 63 is continuously formed between the peak portion 61 and the valley portion 62.
- Each peak 61 in the connecting metal fitting 6 is attached to the flange 86a by a plurality of bolt screws 57, while each trough 62 is attached to the flange 86b by a plurality of bolt screws 56.
- the target members are the flanges 86a and 86b.
- the connecting hardware 6 has one or more (5 in the illustrated example) slit holes 65 formed therein.
- the slit holes 65 are arranged on the web portion 63 at regular intervals along at least the member axial direction I perpendicular to the longitudinal direction H.
- each web part 63 the area
- each web portion 63 is bent and yielded at an early stage to cause plastic deformation, so that it is possible to exhibit a stable deformation energy absorbing performance in which a rise in yield strength is suppressed. Therefore, it is possible to reliably exhibit a sufficient vibration damping function in the building structure 1.
- the connecting hardware 6 adopts a folded plate structure, and each web portion 63 reciprocates between the target members (flanges 86a, 86b) many times. For this reason, the arrangement density of each web part 63 between these object members (flange 86a, 86b) can be raised. As a result, the energy absorption efficiency can be increased and the seismic performance can be further improved.
- connecting hardware 6 is not limited to the mounting structure of the above-described vibration dampers 10 and 80, and may be attached to any target member.
- FIG. 11 is a perspective view showing a detailed structure of the connection hardware 90 of the present embodiment.
- FIG. 12 is a perspective view of the vibration damper 9 formed by inserting the connecting hardware 90 into the grooved steel 169.
- the vibration damper 9 includes a steel pipe 92 connected to the anchor bolt 91.
- a connecting hardware 90 is welded to the steel pipe 92.
- a plurality of slit holes 65 are formed in each web portion 98 in the connecting hardware 90.
- the connecting metal piece 90 is formed by alternately bending a steel plate along its longitudinal direction to alternately form a plurality of crests 95 and a plurality of troughs 96. As shown in FIG. When viewed in a cross section perpendicular to the longitudinal direction, it has a substantially H shape.
- the steel pipe 92 is inserted into the connection hardware 90 and welded, at least the gaps 96 between the connection hardware 90 and the steel pipe 92 are welded. Further, a web portion 98 is formed between each mountain portion 95 and each valley portion 96. Further, another web portion 98 is formed on the outer peripheral surface of the connection hardware 90.
- Each slit hole 65 is formed in each web part 98. As a result, the yield strength of each web part 98 is suppressed lower than other places.
- connection hardware 90 which welded the steel pipe 92 which has the said structure is inserted in the grooved steel 169 with a lip, as shown in FIG.12 and FIG.13.
- the grooved steel 169 includes a web portion 101, flange portions 102a and 102b formed integrally on both sides thereof, and a lip 103 formed integrally on each end edge of the flange portions 102a and 102b. It is an approximately C-shaped steel. Each lip 103 may be omitted.
- the above-described target members correspond to the anchor bolt 91 and the channel steel 169. That is, when the grooved steel 169 is applied to, for example, a column member of a thin and light-weight steel structure, the anchor bolt 91 as one target member is displaced along the member axial direction J in FIG. As a result, the shear stress along the member axial direction J is also applied to the respective web portions 98 of the connecting hardware 9 interposed between these target members (anchor bolts 91 and channel steel 169), and further bending is performed. The moment is loaded as well. As a result, the web portions 98 are bent and yielded in the regions 63a between the slit holes 65 adjacent to each other based on the bending moment.
- the connecting hardware 90 of the present embodiment also adopts a folded plate structure, like the connecting hardware 6 of the first embodiment, and each web portion 98 is reciprocated many times between the target members. ing. For this reason, the arrangement
- the connection metal fitting 90 which consists of the structure mentioned above to a thin and lightweight shape steel structure.
- each connection hardware in the first and second embodiments is a connection hardware that connects a pair of target members that are relatively displaceable along one direction, and is one of the target members.
- a mounting direction of each first mounting portion with respect to the one target member and a mounting direction of the second mounting portion with respect to the other target member are such that the surface of the plate portion follows the direction of relative displacement.
- the configuration is adopted. And by having comprised this structure, it has succeeded in producing the above-mentioned effect.
- connection hardware to which the present invention is applied may have its detailed configuration determined by various parameters as shown in the following formula (1).
- FIG. 14 shows the location of each variable used in the following equation (1). ... (1)
- L has shown the length along the member axial direction K of a connection metal fitting.
- t has shown the board thickness of the connection metal fitting.
- A indicates the cross-sectional area of the target member.
- l indicates the shear length per one damper 251.
- F represents the F value
- E represents the Young's modulus (the subscript s is the Young's modulus of the damper 251, and no subscript is the Young's modulus of the base material), and d represents the width between the dampers 251.
- each said damper 251 has shown the area
- the stage number m of the damper 251 is 5 stages in FIG.
- the number n of the web portions in which the slit holes 65 are formed is three in FIG.
- the number of folded plates s is one.
- the cross-sectional area A of the target member is a region indicated by dots in FIG.
- the cross-sectional width d of the damper 251 indicates the width dimension of the damper 251 along the K direction.
- the said Formula (1) is a conditional formula regarding the cross-sectional width
- the damper 251 has higher rigidity than the target member, and further has a yield strength higher than that of the target member. Can be lowered. As a result, it is possible to exhibit high rigidity as a folded plate damper and a role of high energy absorption by plasticization.
- the left side in the above equation (1) is a term determined from rigidity. That is, the sum of the bending rigidity of the folded plates constituting the connecting hardware is set so as to exceed the rigidity of the base material.
- the right side in the above formula (1) is a term determined from the yield strength. That is, it means that the yield strength of the folded plate constituting the connection hardware is set so as to exceed the yield strength of the base material.
- the damper 251 allocated at least between the slit holes 65 in the web portion 63 causes a shear yield in the central portion 253 in the length direction, and both end portions 252a. , 252b can be bent and yielded.
- the cross section of the central portion 253 may be narrowed so that the shear yield occurring in the central portion 253 and the bending yield occurring in both end portions 252a and 252b occur simultaneously.
- connection hardware of the present invention When the connection hardware of the present invention is used for connection between target members that are a part of a building structure, it is possible to improve the vibration energy absorption performance associated with earthquakes and the like and improve the rigidity.
Abstract
Description
本願は、2009年3月12日に、日本に出願された特願2009-059393号に基づき優先権を主張し、その内容をここに援用する。
この接合金物では、第1の方向に沿って交互に山部及び谷部が形成されるとともに、これら山部と谷部との間にウェブ部が形成されている。そして、山部を一方の対象部材に接合させるとともに、谷部を他方の対象部材に接合させる。そして、ウェブ部を、第2の方向への各対象部材間の相対変位に応じて塑性変形させることにより、エネルギー吸収性能を発揮させる。
さらに言うと、各板部は、第1取り付け部及び第2取り付け部により、相対変位方向に沿ったそれらの両縁(すなわち、各板部と第1取り付け部及び第2取り付け部との間に形成される両縁)が拘束された状態にある。そのため、これら板部が相対変位の方向に沿って塑性変形する際には、それらの両縁が拘束された状態のまま塑性変形するため、各板部は、それらの両縁に垂直かつそれらの表面に沿った軸線回りに捻れようとする力が生じたとしても、上述の拘束によりこの捻れの力を受け止めることができる。その結果、捻り剛性が高まるため、各板部が捻れて横倒れを起こしてエネルギー吸収性能が低下してしまうことを防止できる。
よって、第1取り付け部及び第2取り付け部が無い場合に比較して、各板部は、相対変位の方向に沿って確実に塑性変形することができるので、より安定的にエネルギーを吸収することが可能となる。
以上説明の理由により、この連結金物を建築構造物の一部である対象部材間の連結に用いた場合、地震等に伴う振動エネルギーの吸収性能を向上させるとともに剛性を向上させることが可能となる。
また、孔の形成によって各板部が塑性変形しやすくなるため、これら板部が塑性変形した際の反力を受け止める各対象部材に求められる剛性及び耐力を低くすることができる。その結果、これら対象部材の薄肉化、小型化に寄与することが可能となる。
また、各板部を薄肉化して多列配置した場合、これら板部1枚あたりの固定度(1枚の板部の剛性及び耐力に対する対象部材の剛性及び耐力の度合い)を高めることが出来る。その結果、対象部材の変形が抑制されてかつ、各板部からなるダンパー全体としての剛性を高めることができるので、各板部のエネルギー吸収性能を向上させることが可能となる。
図1は、本発明の制振構造の第1の実施形態である制振ダンパー10が配設された建築構造物1の骨組を示す正面図である。この建築構造物1は、複数本の鋼管柱2と、これら鋼管柱2間に連結される複数本の梁材3とを備えている。
制振部42では、ブレース主材41aの一端と、ブレース主材41bの一端とを互いに突き合わせた状態で、矩形状断面を有する1本の鋼管43及び4個の連結金物6を介して連結されている。図3は、この制振部42の組立てを説明するための分解斜視図であり、図4は、連結金物6の一部分を示す斜視図である。
この連結金具6の各山部61が前記ウェブ部52に対して複数本のボルトネジ57により取り付けられる一方、各谷部62が鋼管43に対して複数本のボルトネジ56により取り付けられている。
図6に示すように、この曲げ降伏は、互いに隣接するスリット孔65間の領域63aにおいて部材軸線方向Eに沿った幅寸法が最小となる括れが形成されていることから、この領域63aが優先的に降伏しやすい。
仮に、地震等による地震力を受けて建築構造物1が揺れた場合、図2Aに示すように、制振ダンパー10のブレース主材41a,41bそれぞれに対してσFの応力が負荷される。その結果、特に各対象部材(ウェブ部52、鋼管43)間に、前記軸線方向Eに沿った応力σEが負荷される。
そして、図4に示すように、前記軸線方向Eに沿って各対象部材(ウェブ部52、鋼管43)間に相対変位が生じると、図6に示すように、各ウェブ部63にせん断力F1が作用し、その結果、曲げモーメントMが負荷される。そして、各ウェブ部63は、互いに隣接するスリット孔65間の領域63aにおいて、曲げモーメントMに応じて曲げ降伏する。その結果、以下に説明する特有の効果を発現することが可能となる。
図8に示すように、本構成例では、2本の溝形鋼43’を、これらのU字形の開口部分が互いに対向するように配置させている。そして、これら溝形鋼43’のU字形の底面部分に対してブレース主材41のフランジ51a又は51bを当接させた状態で、連結金物6における各谷部62が溝形鋼43’のU字形の内側面部分に対して複数本のボルトネジ56により接合されている。
この構成においても、各対象部材(ウェブ部52、各溝形鋼43’)間において相対変位が生じた場合に、この相対変位に応じて連結金物6の各ウェブ部63が塑性変形するので、エネルギー吸収性能を発揮することが可能となる。その結果、柱材であるブレース主材41の振動軽減を図ることが可能となり、また上述と同様に剛性を向上させることも可能となる。
ブレース主材83aは、一方向に沿って延在するウェブ部85aと、このウェブ部85aの一方の縁部に沿って設けられたフランジ部86aとを備えるT形鋼である。同様に、ブレース主材83bは、一方向に沿って延在するウェブ部85bと、このウェブ部85bの一方の縁部に沿って設けられたフランジ部86bとを備えるT形鋼である。
次に、本発明を適用した連結金物の第2の実施形態について説明する。
図11は、本実施形態の連結金物90の詳細構造を示す斜視図である。図12は、この連結金物90を溝形鋼169に内挿して構成した制振ダンパー9の斜視図である。制振ダンパー9は、アンカーボルト91に連結される鋼管92を備えている。そして、この鋼管92に連結金物90が溶接されている。
この連結金物90内に鋼管92を挿入して溶接する際には、少なくとも、連結金物90の各谷部96と鋼管92との間を溶接する。また、各山部95と各谷部96との間に、ウェブ部98が形成される。さらに、連結金物90の外周面にも、他のウェブ部98が形成されている。各スリット孔65は、各ウェブ部98のそれぞれに形成されている。その結果、各ウェブ部98の降伏強度は他の箇所よりも低く抑えられている。
なお、上述した構成からなる連結金物90を、薄型軽量形鋼構造物に適用してもよい。
本発明を適用した連結金物は、下記(1)式に示すような各種パラメータで、その詳細構成が決定されてもよい。ちなみに、図14は、下記(1)式で使用する各変数の場所を示している。
上述したように、ダンパー251の段数mは、図14で言うと5段である。また、スリット孔65が形成されたウェブ部の数nは、図14で言うと3枚である。また、折板の枚数sは1枚である。対象部材の断面積Aは、図14中のドットで示した領域である。ダンパー251の断面幅dは、ダンパー251のK方向に沿った幅寸法を示している。
2 鋼管柱
3 梁材
6 連結金物
10 制振ダンパー(制振構造)
21 鋼管
22 柱梁連結部
25、26 連結部材
31 ウェブ部(板部)
32 フランジ部
41 ブレース主材
42 制振部
43 鋼管
51 フランジ部
52 ウェブ部(板部)
56、57 ボルトネジ
61 山部(第1取り付け部)
62 谷部(第2取り付け部)
63 ウェブ部(板部)
63a 各スリット間の領域(括れ)
65 スリット孔(孔)
80 制振ダンパー(制振構造)
Claims (10)
- 一方向に沿って相対変位自在な一対の対象部材間を連結する連結金物であって、
前記各対象部材の一方に対して取り付けられる複数の第1取り付け部と、前記各対象部材の他方に対して取り付けられる第2取り付け部と、前記各第1取り付け部及び第2取り付け部間をつなぐ複数枚の板部とを備え;
前記一方の対象部材に対する前記各第1取り付け部の取り付け方向と、前記他方の対象部材に対する前記第2取り付け部の取り付け方向とが、前記板部の表面が前記相対変位の方向に沿うように設定されている;
ことを特徴とする連結金物。 - 前記第1取り付け部と前記板部と前記第2取り付け部とがこの順で連続して形成された山谷部を含む折板である
ことを特徴とする請求項1に記載の連結金物。 - 前記各板部の降伏耐力の総和が、前記各対象部材のどちらの降伏耐力よりも低いことを特徴とする請求項1に記載の連結金物。
- 前記各板部に、それらの板厚方向に沿って貫通する孔が形成されていることを特徴とする請求項1に項記載の連結金物。
- 前記孔が、前記相対変位の方向に沿って複数形成され;
これら孔間の部分に括れが形成されている;
ことを特徴とする請求項4記載の連結金物。 - 建築構造物の一部をなすとともに一方向に沿って相対変位自在な一対の対象部材と;
これら対象部材間を連結する請求項1~5の何れか1項に記載の連結金物と;
を備えることを特徴とする制振構造。 - 前記各対象部材の一方がH形鋼であり;
前記各対象部材の他方が鋼管または軽溝形鋼であり;
前記各第1取り付け部が前記H型鋼のウェブ部に取り付けられ;
前記第2取り付け部が前記鋼管または前記軽溝形鋼に取り付けられている;
ことを特徴とする請求項6に記載の制振構造。 - 前記鋼管または前記軽溝形鋼の下端が地面に固定され;
前記H形鋼が柱体である;
ことを特徴とする請求項7に記載の制振構造。 - 請求項6に記載の制振構造を備えることを特徴とする建築構造物。
- 薄型軽量形鋼構造物であることを特徴とする請求項9に記載の建築構造物。
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CA2754675A CA2754675C (en) | 2009-03-12 | 2010-03-11 | Metal joint, damping structure, and architectural construction |
CN2010800110209A CN102348859B (zh) | 2009-03-12 | 2010-03-11 | 连结用金属器具、减振构造以及建筑构造物 |
US13/138,579 US8590220B2 (en) | 2009-03-12 | 2010-03-11 | Metal joint, damping structure, and architectural construction |
JP2010532370A JP4729132B2 (ja) | 2009-03-12 | 2010-03-11 | 連結金物、制振構造、及び建築構造物 |
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