JP4819198B2 - Consolidated hardware - Google Patents

Description

The present invention relates to a connecting hardware that connects a plurality of target members and exhibits energy absorption performance according to relative displacement between the target members.
This application claims priority on 2010/01/13 based on Japanese Patent Application No. 2010-005013 for which it applied to Japan, and uses the content for it here.

  In recent years, with the improvement of disaster prevention awareness, there are an increasing number of building structures such as houses and condominiums that employ a vibration control structure that suppresses vibrations during earthquakes with vibration control dampers. As a damping damper used in this type of damping structure, for example, a steel damper that absorbs vibration energy in the history of steel yielding and plasticizing when compressed and tensioned exhibits high damping performance at low cost. Because it can be used, it is used in many building structures. Among steel dampers, 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.

  As a conventional structure, for example, in Patent Document 1, the width dimension of the damping member is determined from both ends so that the damping member coupled between the first coupling portion and the second coupling portion undergoes bending-shear yield. There is also proposed a small joint hardware at the center. According to this connection hardware, when a repeated load such as an earthquake is applied, the shear strength of the central part of the damping member starts to increase, both ends bend and yield, and both ends are in a hinge state. It deforms by drawing a hysteresis loop with the applied shear force as the upper limit proof stress. By drawing such a history loop, the connecting hardware (damper steel plate) can exhibit a damping effect (history damping) corresponding to the history absorbed energy.

  Patent Document 2 proposes a steel structural member having a damping characteristic capable of absorbing vibration energy. This steel structural member is used for connecting a framework of a structure, and has an H-shaped steel member and a steel plate connected substantially orthogonally to the web of the H-shaped steel member, and is plastically deformed. Since the web of the part is plastically deformed, the behavior of the frame is kept within the elastic behavior range.

  Patent Document 3 discloses a steel elastic-plastic damper in which a slit is formed in a steel plate. This steel elasto-plastic damper has a shape in which the width dimension at the center is smaller than the width dimension at both ends.

Japanese Laid-Open Patent Publication No. 2008-111332 Japanese Unexamined Patent Publication No. 2001-115599 Japanese Unexamined Patent Publication No. 2003-184926

  By the way, in FIG. 1 etc. of the above-mentioned Patent Document 1, the above-mentioned damper steel plate is attached to each connecting steel plate adjacent to both edges thereof, and two reinforcing steel members erected between these two connecting steel plates. However, the structure provided in both the upper and lower ends of the said steel plate for dampers is disclosed. However, according to this configuration, a large number of members such as a damper steel plate, a connecting steel plate, and a reinforcing steel material are individually manufactured, and these are assembled last, resulting in excessive manufacturing labor and material costs. It also causes the rise of.

  Moreover, the structure which bent the side edge of the steel plate for dampers which formed the slit in FIG. 8-10 in this patent document 1 is disclosed. According to such a configuration, a certain amount of width is secured between the slit constituting the damper and the side edge thereof, so that the damper steel plate can be attached within a small deformation amount of the damper steel plate. Out-of-plane deformation of the shape steel can be suppressed. Furthermore, since it has a flange part in the both-sides edge of the steel plate for dampers, the bending rigidity of steel plate itself for dampers can also be improved. However, in this configuration, it is necessary that the section steel to which the damper steel plate is attached directly bears the tensile stress in the damper generated by the plastic deformation of the damper steel plate. However, when the shape steel does not have the rigidity and proof strength to bear the tensile stress in the out-of-plane direction, the shape steel is deformed out of plane, and the energy absorption amount of the damper steel plate is reduced. There is a risk that.

  In the structure disclosed in Patent Document 2, it is difficult to prevent out-of-plane deformation of the shape steel to which the steel structural member is attached, so that the out-of-plane rigidity of the same shape steel and the rigidity of the end of the damper are ensured. In addition, it was necessary to increase the thickness of the shape steel. Further, in the disclosed technique of Patent Document 2, since a large number of members are individually manufactured and assembled at the end, the manufacturing labor is excessive and the material cost is increased.

  Furthermore, the disclosure technique of Patent Document 3 also needs to increase the cross-sectional diameter and increase the plate thickness of the mounting side member so that the mounting side member to which the steel elastic-plastic damper is mounted is not deformed out of plane. There was a problem that the material cost was increased. There is also a problem that the bending rigidity of the steel elasto-plastic damper and the attachment side member is small.

  That is, Patent Documents 1 to 3 have a problem that all of out-of-plane rigidity, bending rigidity, energy absorption characteristics, and manufacturing labor cannot be improved.

  The present invention has been devised to solve the above-described problems, and the object of the present invention is to improve any of out-of-plane rigidity, bending rigidity, and energy absorption characteristics with a very simple configuration. It is to provide a connected hardware that is possible.

The present invention employs the following means in order to solve the above problems and achieve the object.
That is,
(1) connecting hardware according to one embodiment of the present invention connected between a pair of object member, a connecting hardware to exert energy absorption performance in accordance with the relative displacement between these target member, wherein each target member A web connected to one side, and a first connecting portion provided at both ends of the web in a crossing direction intersecting the direction of the relative displacement and including a pair of flanges connected to the other of the target members; a damper unit the web, damper piece formed by continuous multiple in the intersecting direction, by plastic deformation in response to the relative displacement, to exert the energy absorption performance; interposition steel without a having a An intermediate portion provided between the damper portion and the flanges, and a second connecting portion provided between the damper pieces formed in a plurality and connected to the one target member. teeth; before It has a pair of frame edge portion allocated including interposing portion and the flange, these frame edge, and said bridging portion assigned to the web to bridging between the ends of the relative displacement direction.

(2) In the connecting hardware described in (1) above, the width dimension of each damper piece at the central portion in the intersecting direction may be smaller than the width dimension at both ends of the central portion.

(3) In the connection hardware according to (1), when the web part is viewed from the front, the width dimension of the interposition part is s, and the width dimension of the end part on the interposition part side of the damper piece is d. _{When set to 2} , the following expression (1) may be satisfied.
√3 / 4 × d ₂ ≦ s (1)

(4) In the connection hardware according to the above (1), the connection position with respect to the one target member may be assigned to a continuous portion between the damper pieces.

(5) A pair of the connecting hardware described in the above (1) has a shape in which the edges of the flanges of the connecting hardware are butted against each other, and viewed in a cross section perpendicular to the direction of the relative displacement. You may employ | adopt the structure which has comprised the rectangular shape steel in a case.

(6) The connection hardware according to any one of (1) to (5) may have transformation-induced plasticity.

(7) The connection hardware according to (6) may have a reinforcing layer formed on the surface thereof by hot dip galvanization, electrogalvanization, or electrodeposition coating.

  According to the connection metal fitting which concerns on the said aspect, it becomes possible to improve the energy absorption characteristic with respect to the relative movement between each object member. Moreover, in order for the frame edge part to transmit stress to each installation part, it is necessary to improve its rigidity. However, since this frame edge part includes a flange, the cross-sectional secondary moment should be improved. It is possible to improve the bending rigidity of the frame edge itself.

  Further, by providing the erection part, it is possible to suppress the out-of-plane deformation of the web part and to obtain a stable energy absorption characteristic by the damper piece.

  Furthermore, according to the connection metal fitting which concerns on the said aspect, the damper part, erection part, and frame edge part which comprise this are all allocated by processing one steel plate, Comprising: It was not manufactured and joined after the fact. For this reason, it is not necessary to join or weld each member, and it becomes possible to reduce the burden of manufacturing labor and to suppress the material cost.

It is a perspective view which shows 1st Embodiment of the connection metal fitting to which this invention is applied. It is a top view which shows the detailed structure of the connection metal fitting. It is a side view which shows the detailed structure of the connection metal fitting. It is the elements on larger scale for demonstrating the detailed structure of the damper part in the connection hardware. It is a perspective view which shows the example which connected between a pair of object members with the connection metal fitting. It is a figure which shows the attachment structure shown in FIG. 5, Comprising: It is a plane sectional view at the time of seeing in the cross section perpendicular | vertical to the longitudinal direction. It is a top view which shows the stress vector distribution in the said connection metal fitting. It is a top view which shows the stress vector distribution in the other connection hardware which is a comparative example with respect to the said connection hardware. It is a side view of the connection metal fitting. It is a figure for demonstrating the effect by providing a frame edge part in the connection metal fitting of the embodiment, Comprising: It is the elements on larger scale of the connection metal fitting of this embodiment. It is a figure for demonstrating the effect by providing the frame edge part, Comprising: It is the elements on larger scale of a comparative example. It is a graph which shows the influence of the separation distance s of the frame edge part and the flange width length ho with respect to various characteristics. It is the elements on larger scale for demonstrating the effect by providing a frame edge part in the connection metal fitting of the embodiment. It is the elements on larger scale for demonstrating the effect by providing the frame edge part. It is a graph which shows the result of a repeated gradual increase test. It is a perspective view which shows 2nd Embodiment of the connection metal fitting to which this invention is applied. It is the elements on larger scale which show the difference of the effect based on the difference in slit hole shape when a damper part deforms plastically, Comprising: (a) shows the case of the said 1st Embodiment, (b) is 2nd implementation. The case of form is shown. It is a figure which shows 3rd Embodiment of the connection metal fitting to which this invention is applied, Comprising: It is a partial expansion perspective view which shows the return part which turned up the front-end | tip of a flange. It is a figure which shows 4th Embodiment of the connection metal fitting to which this invention is applied, Comprising: It is a perspective view of the form which uses the cross-section rectangular shape steel. It is a graph which shows the relationship between the yield strength of the connection metal fitting in the said 1st Embodiment, and the product of yield strength and elongation. It is a graph which shows the relationship between the stress and distortion of the connection metal fitting. It is a figure which shows the shape of the connection metal fitting which concerns on a comparative example. It is a figure which shows the result of having performed the repeated gradual increase test with respect to each of the connection metal fitting which concerns on the comparative example, and the connection metal object which concerns on a present Example, Comprising: (a) shows the test result of a comparative example, (b ) Shows the test results of this example. It is a figure which shows the result of having performed the low cycle fatigue test with respect to each of the connection metal fitting which concerns on another comparative example, and the connection metal fitting which concerns on a present Example, a gray log | history shows a present Example and a black log | history compares An example is shown.

  Hereinafter, as each embodiment of the present invention, a connection hardware connected between a pair of target members constituting a building structure and exhibiting energy absorption performance according to relative displacement between the target members will be described with reference to the drawings. Details will be described.

[First Embodiment]
FIG. 1 is a perspective view showing a detailed structure of a connecting hardware 1 according to the first embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a side view when viewed from the left side of FIG. Is shown. The connecting hardware 1 is a single steel plate formed of channel steel having a rectangular web 2 and a pair of flanges 3 formed integrally and at right angles on each long side of the web 2. is there.

  A plurality of slit holes 21 are formed in the web 2 so as to penetrate in the thickness direction of the web 2. These slit holes 21 are configured to be vertically long in the width direction B perpendicular to the longitudinal direction A of the web 2. In the present embodiment, the shape of the slit holes 21 is a rhombus, but is not limited to a rhombus, and may be a rectangle that is vertically long in the width direction B, or other polygonal shapes or indefinite shapes. It may be adopted. Two slit holes 21 are formed at predetermined intervals when viewed along the width direction B of the web 2, but the number of holes in the width direction B is not limited to two, Three or more may be formed. A pair of slit holes 21 adjacent to each other along the width direction B is assigned as a second connecting portion 28. When viewed along the longitudinal direction A of the web 2, a plurality of slit holes 21 (four in the present embodiment) are arranged in a row at a predetermined interval.

  The web 2 has slit holes 22 formed at both end positions in the longitudinal direction A. These slit holes 22 have a larger opening area than the slit holes 21. The width dimension of these slit holes 22 in the width direction B matches the width dimension of both ends of each slit hole 21 arranged in the width direction B. Each slit hole 21 is arranged in a plurality in the width direction B, whereas each slit hole 22 is formed as one long hole in the width direction B. The slit hole 22 may have any shape, but in the present embodiment, the substantially central portion in the width direction B is tapered toward the end in the longitudinal direction A and viewed along the longitudinal direction A. The size of the case is larger than the size of each slit hole 21. Thereby, when absorbing vibration on the web 2, it is possible to sufficiently secure the movable range of the second connecting portion 28, and it is possible to cope with the case where the deformation amount of the web 2 increases due to a large earthquake. It is possible. Further, the edge 22a1 on the side adjacent to each slit hole 21 of the slit hole 22 is formed in a shape that is substantially line symmetrical with the outline shape of each slit hole 21 formed in a substantially rhombus shape.

Furthermore, as described above, the edge 22a2 on the side facing each of the edges 22a1 of each slit hole 22 is tapered at an obtuse angle toward the end in the longitudinal direction A, and further, the taper thereof. The front end portion 22a3 has a predetermined dimension (for example, 4 mm) and a flat shape along the width direction B.
And the convex part 22a4 is formed in the center position of edge part 22a1 so that the front-end | tip part 22a3 of this edge part 22a2 may be opposed. As the shape of the convex portion 22a1, for example, a protruding length from the edge portion 22a1 is 5 mm and a width dimension along the width direction B is 4 mm.

  The reason for providing the convex portion 22a4 is that when the second connecting portion 28 is fixed to the target member by welding, it is surely welded to both ends along the longitudinal direction A of the second connecting portion 28. This is because the welding may be difficult and may be peeled off from both ends due to insufficient welding. By providing each convex part 22a4 so that both ends of each 2nd connection part 28 may be extended like this embodiment, it becomes possible to obtain more reliable welding fixation easily.

The reason is that the tip 22a3 has a flat shape because it matches the tip of the flat convex portion 22a4. By adopting such a flat shape, the cross-sectional height d ₀ (see FIG. 2) of the central portion of the erection portion 31 can be made larger than when there is no flat portion. As a result, the rigidity of the erection part 31 can be further increased, which is preferable.

  In addition, it is essential that each edge part along the width direction B of each slit 21 and 22 is spaced apart from the boundary line of the web 2 and each flange 3 in the both ends by the space | interval s to the web 2 inner surface side. is there. That is, the end portions of the slits 21 and 22 are separated from the flanges 3 toward the inner surface side of the web 2 by an interval s equal to the width dimension of the interposition portion 2X.

  A plurality of damper portions 26 are formed in the web 2 by forming the slit holes 21 and 22 in the shape and arrangement as described above. FIG. 4 shows the detailed shape of each damper portion 26.

  The damper part 26 has two damper pieces 25 surrounded by a dotted line in FIG. These damper pieces 25 are provided between a pair of slits 21 adjacent to each other in the longitudinal direction A or between slits 21 and 22 adjacent to each other in the longitudinal direction A. Each damper piece 25 exhibits an energy absorbing function by being plastically deformed in accordance with the relative displacement in the longitudinal direction A thereof. Two of these damper pieces 25 are continuously provided along the width direction B. These damper pieces 25 are required to have both end portions in the width direction B separated from the boundary line between the web 2 and each flange 3 at both ends thereof by an interval s toward the inner surface side of the web 2.

Since each slit hole 21 has a substantially rhombus as described above, the damper piece 25 has a cross-sectional height d _{1 at} the center along the width direction B smaller than a cross-sectional height d _{2 at} both ends thereof. ing. A pair of damper pieces 25 adjacent to each other along the width direction B are connected via a second connecting portion 28. In addition, each 2nd connection part 28 continued along the longitudinal direction A and a pair of said convex part 22a4 located in these both ends become the fixing | fixed part to the said object member, and it is by welding in this embodiment. Since it is assumed to be fixed, bolt holes are not formed. However, since the fixing is not limited only to welding, a bolt hole may be formed and fixed by a fixing member such as a bolt.

The interval s may satisfy the following expression (1) with respect to the cross-sectional height d ₂ at both ends of the damper piece 25.
√3 / 4 × d ₂ ≦ s (1)
Further, the shape of the damper piece 25, the relationship between the cross-sectional height d ₂ of the sectional length d ₁ and both ends of the central portion of the damper piece 25 may satisfy the following equation (2).
L: Length of the damper piece 25 along the width direction B (mm)
d ₁ : Section height (mm) at the center of the damper piece 25
d ₂ : Section height (mm) at both ends of the damper piece 25

  When the shape of the damper piece 25 satisfies the above equation (2), the central portion and both end portions of the damper piece 25 are bent and sheared almost simultaneously, and the plastic deformation region expands to the entire area of the damper piece 25. The amount of energy absorption increases. In addition, since the plastic deformation region of the damper piece 25 is expanded, an increase in yield strength after plasticization can be suppressed.

  As shown in FIG. 2, a pair of frame edges 32 are provided on the connection hardware 1 of the present embodiment. These frame edge portions 32 are configured by the flange 3 and a portion of the web 2 adjacent to the flange 3. Here, the part close to the flange 3 in the web 2 means the interposition part 2X which is an area indicated by the interval s from the end of the web 2 in the width direction B to the end of the slit hole 21. That is, the frame edge portion 32 is assigned to a region from the end portion in the width direction B of the damper portion 26 to the flange 3.

  In addition, a pair of erection portions 31 are assigned to the web 2 in the connection hardware 1 of the present embodiment. These installation parts 31 are allocated on the web 2 so as to install between the pair of frame edge parts 32 at each end in the longitudinal direction A. These erected portions 31 have a substantially central portion that is narrowed along the width direction B, thereby securing an operating region along the longitudinal direction A of the damper piece 25. In addition, although it is a boundary between the erection part 31 and the frame edge part 32, in the following description, the flange 3 side is the frame edge part 32 from the straight line indicating the interval s, and the center side in the width direction B is erection for convenience. Part 31 is defined.

The damper part 26, the erection part 31, and the frame edge part 32 constituting the connection hardware 1 are all assigned by processing a single steel plate, and each of the independent parts is manufactured after the fact. It was not connected.
As shown in FIG. 1, a plurality (four in this embodiment) of female screw holes 3a are formed in each flange 3 along the longitudinal direction A so as to penetrate in the plate thickness direction at equal intervals. Has been. A fixing member (for example, a drill screw 57 to be described later) for fixing the coupling metal 1 to the target member at the flange 3 is screwed into the female screw holes 3a. In the present embodiment, the flanges 3 are attached by the drill screws 57. However, the present invention is not limited to this configuration and may be fixed by welding.
In addition, as shown in FIG. 3, the shape of the flange 3 in this embodiment employs a shape obtained by bending the side edge of the steel plate. A T-shape that is perpendicular to the web 2 may be used.

  When the connecting hardware 1 having the above-described configuration is used, it is used by being attached to a target member for absorbing vibration energy. Specifically, each flange 3 is a first connecting portion, and the slit 21 adjacent in the width direction B is a second connecting portion 28 as described above, and each of the first connecting portion and the second connecting portion 28 is an object. Attach to the member.

  That is, each flange 3 that is the first connecting portion is connected to one target member, and the second connecting portion 28 is connected to the other target member.

  5 and 6 show an example in which a pair of target members are connected by the connecting hardware 1. In this example, one target member is a channel steel 169, and the other target member is a steel pipe 92 connected to the anchor bolt 91.

Hereinafter, assembly of the connection structure shown in FIGS.
First, the steel pipe 92 is sandwiched between the pair of connecting hardwares 1 and fixed at each second connecting portion 28 by, for example, welding.
Subsequently, the parts assembled as described above are fixed by a plurality of drill screws 57 while being passed through the channel steel 169.
Finally, the anchor bolt 91 is inserted into the steel pipe 92, and the nut 105 is screwed from above and below the anchor bolt 91 until it contacts the upper and lower ends of the steel pipe 92, thereby assembling the above connecting structure.

  In the energy absorbing structure having the above configuration, the above-described target member corresponds to the steel pipe 92 connected to the anchor bolt 91 and the channel steel 169. That is, when this grooved steel 169 is applied to, for example, various building structures, pillar members such as thin and light shaped steel structures such as steel houses, the anchor bolt 91 as one target member is shown in the figure. It is displaced toward the member axial direction C. As a result, the second connecting portion 28 of the connecting hardware 1 interposed between these target members (anchor bolt 91, channel steel 169) is also subjected to a shearing stress along the member axial direction C, and a bending moment. Is similarly loaded.

As an example of the stress vector distribution of the connecting hardware 1, a vector distribution as shown in FIG. Each flange 3 of the first coupling part, since the stress sigma _A along the longitudinal direction A shown in the figure are loaded, so that the stress sigma _A is loaded to the frame edge portion 32. Further, a stress σ _B is applied to the second connecting portion 28 in the longitudinal direction A in the drawing. As a result of the stresses σ _A and σ _B being applied to the connecting hardware 1, the stress σ _C is applied to the installation part 31. Further, in the damper piece 25 based on the stresses σ _A and σ _B , the damper piece 25 itself is greatly deformed, so that the stress σ _D acts in addition to the bending moment and the shearing force. By the action of the stress sigma _D, tensile stress is generated in the damper piece 25.

When the stresses σ _A and σ _B are applied, first, each damper piece 25 is subjected to a bending moment and a shearing force to yield. By increasing the diameter of each slit hole 21 in the width direction B, the damper piece 25 bends and yields along the relative displacement direction (same as the longitudinal direction A) according to the relative displacement between the target members. Is possible. In addition, when relative displacement along the longitudinal direction A repeatedly occurs between the target members, the damper pieces 25 are plasticized accordingly, and as a result, energy absorption by the damper pieces 25 is realized. When plastic deformation of each damper piece 25 is increased, each damper piece 25, in addition to the bending moment shear tensile force of the (stress opposite to the sigma _D) begins to occur.

In the present embodiment, since the pair of erection parts 31 are provided, the tensile stress generated in each damper piece 25 acts on each erection part 31 via each frame edge part 32. Since these erection parts 31 have a resistance equivalent to the stress σ _C , it is possible to bear the tensile stress generated in the damper piece 25 by the erection part 31. That is, it is possible to prevent the width dimension of both ends (the erection portion 31) in the longitudinal direction A of the connection hardware 1 from being reduced.

Regarding the cross-sectional length d ₀ of the central portion of the bridging portion 31 _(see FIG. 2) may be adopted a value of d ₀ that satisfies the following equation (3). However, in the present embodiment is not particularly limited only to the scope of the following expression (3) a cross-section length d ₀ of the central portion of the bridging portion 31.
d ₀ : sectional height (mm) of the central portion of the erection part 31
e: Distance (mm) from the end portion of the damper portion 26 at both end positions in the longitudinal direction A to the center of the central cross section of the erection portion 31
n: The number of stages of the damper pieces 25 arranged along the longitudinal direction A (n = 5 in the case of FIG. 7)
t: Plate thickness (mm) of the connecting hardware 1
Z _p : Plastic section modulus of frame edge portion 32 (mm ³ )

By setting the cross-sectional height d ₀ of the central part of the erection part 31 so as to satisfy the above expression (3), the erection part 31 does not collapse before the frame edge part 32 and is generated in the damper piece 25. A tensile stress can be stably borne. Also, without stably the stress to the section length d ₀ of the central portion of the bridging portion 31 is set to be more than 1.5 times the cross section length d ₁ of the central portion of the damper piece 25, installing portion 31 is broken Can bear. The distance e from the damper piece 25 to the installation part 31 may be set to be equal to or greater than the maximum value of the amount of plastic deformation in the longitudinal direction A assumed for the damper piece 25.

FIG. 8A shows the connection hardware 1 when the installation part 31 is not present. In this case, as shown in the figure, when the stresses σ _A and σ _B are applied, the stress σ _D generated in the damper piece 25 cannot be supported by the installation portion 31. As a result, the damper piece 25 shrinks in the width direction B, and as shown in FIG. 8B, the section steel constituting the connection hardware 1 is deformed out of plane in the direction D in the figure.

  On the other hand, in the present embodiment in which the installation portion 31 is provided, such out-of-plane deformation can be suppressed and energy can be stably absorbed by the damper piece 25.

  Moreover, according to the connection metal fitting 1 of this embodiment, each frame edge part 32 is provided as mentioned above. In particular, since these frame edge portions 32 need to transmit stress to the erection portion 31, they need to have sufficient rigidity and strength. In this respect, the frame edge portion 32 is configured to include the flange 3. That is, the region with dots in FIG. 9A is the frame edge 32, which becomes a stress transmission path, but the cross-sectional secondary moment can be improved by the presence of the flange 3, and the frame edge 32 itself It is possible to improve the bending rigidity and the plastic section modulus.

  On the other hand, in the configuration as shown in FIG. 9B in which the flange 3 is not formed on the frame edge portion 32, the stress transmission path indicated by the dots is configured as a flat plate, and sufficient bending rigidity and bending strength cannot be ensured. . If the bending rigidity and the bending strength are low, the stress to be transmitted to the erection part 31 is consumed for the bending deformation of the frame edge part 32, and the stress transmission to the erection part 31 is significantly impaired. In this case, in order to secure the stress transmission path for suppressing the bending deformation of the frame edge portion 32, it is necessary to further supplement the rigidity of the frame edge portion 32, and the manufacturing labor is excessive.

  FIG. 10 shows the frame edge when the frame edge portion 32 includes the flange 3 (in the case of the present embodiment shown in FIG. 9A) and when the flange 3 is not included (in the comparative example shown in FIG. 9B). The ratio between the theoretical value of each rigidity (bending rigidity and torsional rigidity) of the portion 32 and the theoretical value of the energy loss due to the elastic bending deformation of the frame edge portion 32 is shown. The vertical axis represents the ratio, and the horizontal axis represents the value obtained by dividing the flange width length ho of the frame edge 32 by the separation distance s of the frame edge 32. FIG. 10 shows the results when the flange width length ho is variously changed while the separation distance s is constant. The case where the value of the horizontal axis in FIG. 10 is 0 indicates a case where the frame edge portion 32 has no flange, and the vertical axis indicates this as a reference value (= 1).

  From FIG. 10, it can be seen that as the flange width length ho of the frame edge portion 32 increases, both the elastic bending rigidity and the elastic torsional rigidity of the frame edge portion 32 increase. Accordingly, elastic deformation of the frame edge portion 32 is suppressed, and stable stress transmission is possible. Further, by suppressing the elastic bending deformation and elastic torsional deformation of the frame edge portion 32, the plastic deformation can be concentrated on the damper portion 25. As a result, the energy absorption of the damper part 25 can be performed efficiently. As shown in FIG. 10, for example, by providing the flange width length ho of the frame edge 32 to 1.5 times the separation distance s of the frame edge 32, energy absorption generated by elastic bending deformation of the frame edge 32 is achieved. Loss amount can be reduced by about 40%.

  As the flange width length ho of the frame edge portion 32 increases, the bending rigidity and torsional rigidity of the frame edge portion 32 increase, and the energy absorption performance of the connecting hardware 1 also improves. On the other hand, in order to attach the frame edge portion 32 to the flange portion 102 of the grooved steel 169, as a result, the width length ho of the flange 3 is limited, and further considering the economical efficiency as a damper steel plate, If the width ho is set to 1.5 to 2.0 times the separation distance s of the frame edge 32, stable stress transmission is possible.

  In the connection hardware 1 of this embodiment provided with the above-mentioned frame edge part 32, by providing the frame edge part 32 which has the flange 3 in the steel plate for dampers, energy absorption and a stress transmission mechanism are made compatible with one steel plate. It becomes possible to make it. As a result, it is possible to improve the bending rigidity and torsional rigidity of the frame edge portion 32 while reducing the manufacturing labor and cost of the connecting hardware 1 and further increase the energy absorption amount of the connecting hardware 1 itself.

  Furthermore, the damper part 26, the erection part 31, and the frame edge part 32 which comprise the connection metal fitting 1 of this embodiment are all allocated by processing one steel plate, Comprising: Each unit is independent. It was not joined after the fact. For this reason, it is not necessary to join or weld each member, and it becomes possible to reduce the burden of manufacturing labor and to suppress the material cost.

  Further, in the present embodiment, it is essential that the end portions in the width direction B of the slits 21 and 22 are separated from the flange 3 by the interval s. Thereby, the rigidity as the connection metal fitting 1 can be improved. Hereinafter, since the rigidity improvement was verified, it will be described.

  11A and 11B show a test body for verifying the effect of the presence or absence of the interval s (intervening portion 2X). FIG. 11A shows a test body 121 without a shearing section, and FIG. 11B shows a test body 122 with a shearing section. These test bodies 121 and 122 were subjected to a test in which both left and right ends were gripped and a load was repeatedly applied in the direction E in the figure. As a result, shear stress and bending moment as shown in FIGS. 11A and 11B are generated in each of the test bodies 121 and 122.

Next, the initial stiffness of each of the test bodies 121 and 122 loaded with this repeated load was measured. The initial stiffness, and deformation amount [delta] _d to figure E direction in the specimen 121 is obtained from the relationship between P / Py. The P / Py is obtained from the load P actually applied to the test bodies 121 and 122 and the yield load Py of the test bodies 121 and 122.

FIG. 12 shows a graph in which the amount of deformation δ _d (mm) in the test body 122 having the interval s is on the horizontal axis and P / Py is on the vertical axis. P / Py is varied in a range of more than ± 1.0, and the maximum deformation amount [delta] _d is found to be about 7 mm. In addition, FIG. 12 shows that a hysteresis loop having a large area is drawn, and a large hysteresis attenuation is obtained. From the tendency of FIG. 12, the initial stiffness (kN / mm) is obtained from the initial rising angle of the hysteresis loop.

  As a result of obtaining the initial stiffness based on such a method, the initial stiffness of the test body 121 without the interval s is 37.5 (kN / mm), while the initial stiffness of the test body 122 with the interval s is 75. 0.0 (kN / mm). That is, it was confirmed that the initial stiffness of the test body 122 with the interval s was increased by a factor of two compared to the test body 121 without the interval s. Therefore, by providing the interval s, the rigidity of the connection hardware 1 can be further improved.

[Second Embodiment]
FIG. 13 is a perspective view showing a detailed structure of the connection hardware 301 according to the second embodiment of the present invention. In the following description, differences from the first embodiment will be mainly described, and the same reference numerals will be used for other same components, and the description thereof will be omitted.

  The connection hardware 301 of the present embodiment is partially different from the shape of the pair of slit holes 22 in the first embodiment. That is, as shown in FIG. 13, in the slit hole 22A of the present embodiment, the convex portion 22a4 is not formed on the edge portion 22a1, and the center 22A4 of the edge portion 22a1 is completely tapered. Also, the edge 22a2 is not formed with the flat tip portion 22a3, and the center 22A3 of the edge 22a2 is completely tapered.

Differences between the slit hole 22A of the present embodiment and the slit hole 22 of the first embodiment will be described with reference to FIG. 14A shows the slit hole 22 in the first embodiment, and FIG. 14B shows the slit hole 22A in the present embodiment.
For slit 22 shown in (a) of FIG. 14, it is possible to obtain reliable welded and second connecting portions 28, the rigidity strengthening installing portion 31 by securing the wide cross-section length d _0.
On the other hand, in the case of the slit hole 22A shown in FIG. 14 (b), the amount of deformation of each damper portion 26 can be further ensured because there is no convex portion 22a4 or flat tip portion 22a3. That is, when the deformation amount of the connection hardware 1 according to the first embodiment is St1, and the deformation amount of the connection hardware 301 according to the present embodiment is St2, St2> St1, and the connection hardware 301 has higher energy. Absorption performance can be demonstrated. In the case of the present embodiment, if the second connecting portion 28 is fixed by bolts instead of providing the convex portions 22a4, the problem of weldability does not occur.

[Third Embodiment]
FIG. 15 is a partially enlarged perspective view of the flange 3A of the connection hardware 401 according to the third embodiment of the present invention. In the following description, differences from the first embodiment will be mainly described, and the same reference numerals will be used for other same components, and the description thereof will be omitted.

  In the present embodiment, a folded portion 39 is formed as the flange 3 </ b> A with its tip folded back to the back side. By forming such a folded portion 39, the substantial plate thickness of the flange 3A can be increased. As a result, the bending rigidity at the frame edge portion 32 can be further improved. Moreover, by forming such a folding | returning part 39, the tilting at the time of screwing the drill screw 40 can also be prevented, and it becomes possible to improve workability. More specifically, the female screw hole 3a is formed so as to penetrate both the outer portion of the flange 3A and the folded portion 39. When fixing the flange 3A to the target member, the drill screw 40 is supported at two points in the longitudinal direction by screwing the drill screw 40 into both of the two female screw holes 3a. Tilt can be prevented.

[Fourth Embodiment]
FIG. 16 is a perspective view of a connecting hardware 501 according to the fourth embodiment of the present invention. In the following description, differences from the first embodiment will be mainly described, and the same reference numerals will be used for other same components, and the description thereof will be omitted.

As shown in FIG. 16, the connecting hardware 501 of the present embodiment employs a steel having a rectangular cross section as shown in FIG. That is, the connecting hardware 501 of the present embodiment has a shape in which a pair of the connecting hardware 1 described in the first embodiment and the edges of the flanges 3 of the connecting hardware 1 are abutted to each other and connected to each other. When viewed in a cross section perpendicular to the longitudinal direction A, which is the direction of displacement, a rectangular shaped steel is formed.
According to this embodiment, the same effect as the first embodiment can be obtained. Furthermore, according to this embodiment, instead of attaching the two connecting hardware 1 in two steps, one connecting hardware 501 can be attached in one time, so that the workability is good. And workability is also good from the point that the alignment between the two connection hardware 1 is unnecessary.
Furthermore, it is possible to exert a higher resistance against torsion of the target member connected to the second connecting portion 28.

As the material of the connecting hardware 1, 301, 401, 501 described in the first to fourth embodiments described above, it is preferable to employ a so-called low alloy steel (TRIP steel). This TRIP steel intentionally leaves an austenite phase with a high carbon concentration in the steel material at room temperature, and the austenite phase undergoes martensitic transformation, thereby producing a transformation-induced plastic effect (TRIP) that exhibits high strength and large elongation performance. This is a low-alloy steel material that exhibits an effect). As this TRIP steel, for example, it is manufactured by hot rolling, and the chemical components thereof are all by weight%, C is 10.5 × 10 ⁻² , Si is 139.3 × 10 ⁻² , and Mn is 137 × 10 ⁻² , P is 9 × 10 ⁻³ , S is 1 × 10 ⁻³ , Ni is 1 × 10 ⁻³ , Cr is 20 × 10 ⁻³ , and the crystal structure is ferrite, An example in which two phases are formed from bainite and retained austenite can be exemplified. Since it is a low alloy, excellent in weldability, and has a low weight% of expensive elements such as Cr, Ni, Mn, etc., the connecting hardware 1,301, 401, 501 as a construction damper having transformation-induced plasticity is more It can be manufactured at low cost.

As shown in FIG. 17, TRIP steel has a yield strength of 430 N / mm ² or more, and a product of yield strength and elongation is 130 N / mm ² or more. Both the yield strength and the threshold value of the product of yield strength and elongation are the data of high yield point steel with the highest yield strength and energy absorption performance of conventional steel plates for building vibration control (number of samples). n = 51749), which is set to a value exceeding the 95.5% upper reliability limit value of these data. Conventional steel plates for building dampers (high yield point steel, extremely low yield point steels, low yield point steels) do not satisfy the above two thresholds at the same time, so they are stronger than existing steel plates for building dampers And can exhibit a large amount of energy absorption.
That is, the connecting hardware 1,301, 401, 501 can be further downsized (reduced steel plate amount) and the energy absorption amount can be increased as compared with the conventional shear damper.

In addition, it has been developed as an energy absorbing member in seismic isolation devices, has higher yield strength and lower alloy than conventional austenitic stainless steel rods with TRIP effect, and there is no risk of electrical corrosion with carbon steel. Further, it is possible to contribute to the downsizing of the energy absorbing portion 49, the significant reduction in manufacturing cost, and the improvement of corrosion resistance.
Note that in a TRIP steel plate (number of samples n = 495) having a tensile strength of 590 N / mm ² or more, the average value of yield strength is 478 N / mm ² , and the average value of products of yield strength and elongation is 175 N / mm ² . The 68.3% lower confidence limit of the statistical data of TRIP steels, yield strength 463N / mm ^2, the product of the yield strength and elongation 164n / mm ^2, also is 95.5% lower confidence limit value, the yield strength 448N / mm ^2, yield strength and elongation of the product is 152N / mm ^2, further 99.7% lower confidence limit value, the yield strength of 433N / mm ^2, yield strength and the product of elongation 141N / mm ² It is. Accordingly, for TRIP steel having a tensile strength of 590 N / mm ² or more and transformation-induced plasticity, the yield strength is 430 N / mm ² or more, which is a preferable requirement, without applying special treatment / process to the steel material. The product of strength and elongation can satisfy 130 N / mm ² or more.
For example, as shown in FIG. 18, the connecting hardware 1 has characteristics that yield strength (stress) and elongation (strain) are larger than those of high yield point steel.

As described above, as the material of the coupling hardware 1,301,401,501, and having a transformation-induced plasticity, and yield strength of 430N / mm ² or more 700 N / mm ² or less, the product of this yield strength and elongation If but using TRIP steel is 130N / mm ² or more 250 N / mm ² or less, the energy absorption amount per unit volume can be increased than the conventional extremely low yield steel and high yield point steels, improve energy absorption performance it can. Furthermore, since TRIP steel having a self-damage suppressing function is used, crack resistance and crack growth characteristics can be improved, and weldability can also be improved.

As the above-mentioned yield strength is more preferably 440 N / mm ² or more 650 N / mm ² or less, and most preferably further is 450 N / mm ² or more 600N / mm ² or less.
Similarly, the above description, as the product of the yield strength and elongation, more preferably 145N / mm ² or more 240 N / mm ² or less, most even more is 160 N / mm ² or more 230N / mm ² or less preferable.
The upper limit value of the yield strength of TRIP steel was set to 700 N / mm ^2, and the upper limit value related to the product of the yield strength and the elongation was set to 250 N / mm ² for the following reason. That is, when TRIP steel exceeding these upper limit values is used, the dispersion of characteristics becomes large, and manufacturing becomes difficult. Furthermore, it becomes difficult to maintain a strong balance between the connecting hardware and the target member to which the connecting hardware is attached, and as a result, an appropriate structural design cannot be performed. For this reason, the above upper limit is specified.

  Furthermore, when a reinforced galvanized, electrogalvanized, or electrodeposition-coated reinforcing layer is formed on the surface of the connecting hardware 1,301,401,501, the yield ratio can be increased by age hardening, yielding Later increase in yield strength can be suppressed. Furthermore, since the anticorrosion effect is also obtained as a secondary effect, a longer life can be obtained. Further, since the yield strength can be increased by plating treatment or the like, the amount of steel sheet used can be reduced while maintaining the same yield strength as that not subjected to plating treatment, and further miniaturization and weight reduction can be achieved.

  Examples of the present invention will be described below.

[Example 1]
In Example 1, the influence of the shape and material of the connecting hardware on the amount of energy absorption was examined. That is, (a) a connection fitting 500 which is a comparative example using a non-TRIP steel (precipitation strengthened steel) as a raw material and having a shape without the interposition part 2X as shown in FIG. 19, and (b) described in FIG. The above-described connecting metal fitting 1 which is the present embodiment using TRIP steel as a raw material was prepared.
TRIP steel is a material connecting fitting 1 of this example was found to have a transformation-induced plasticity, yield strength 430N / mm ² or more 700 N / mm ² or less and the product is 130N / mm between the yield strength and elongation ² or more and 250 N / mm ² or less. Moreover, the level of the tensile strength (yield strength) of the connection fitting 500 which is a comparative example is substantially the same as that of the above embodiment, but the product of the yield strength and the elongation is smaller than that of the first embodiment.

The results of repeated gradual increase tests for each of these comparative examples and this example are shown in FIGS. 20 (a) and 20 (b). 20A shows the test result of the comparative example, and FIG. 20B shows the test result of the present example.
As can be seen by comparing (a) and (b) of FIG. 20, in the present embodiment shown in (b), the load-deformation curve draws a large hysteresis loop, and the energy absorption performance is improved. Yes. Further, when the total area of the loops drawn repeatedly was calculated as the accumulated energy absorption amount, the connection fitting 1 of this example increased in rigidity by 2.0 times compared to the connection fitting 500 of the comparative example, and energy was reduced. It was confirmed that the amount of absorption increased 4.1 times. This significant performance improvement is obtained as a synergistic effect by the combination of the shape of the connecting metal fitting 1 and the use of TRIP steel as a material.

[Example 2]
In Example 2, the influence of the reinforcing layer on the amount of energy absorption was examined. That is, the present embodiment in which the connecting layer 1 described in FIG. 1 is subjected to a hot dipping process to form the reinforcing layer and the comparative example in which the reinforcing layer is not formed in the connecting member 1 described in FIG. 1 are prepared. did.
FIG. 21 shows a load-deformation curve which is a result of conducting a low cycle fatigue test for each of these comparative examples and this example. In FIG. 21, the gray history indicates the present example, and the black history indicates the comparative example.
As a result of the low cycle fatigue test, the yield strength, yield ratio (YR), and yield strength x elongation values are larger than those of the comparative examples, regardless of whether hot dip galvanizing, electroplating or electrodeposition coating is applied. It was confirmed that Specifically, it was confirmed that the amount of energy absorption of the connecting metal fitting 1 of this example increased by 1.4 times compared to the comparative example. This further performance improvement is obtained as a synergistic effect by the combination of the shape of the connecting metal fitting 1, the use of TRIP steel as a material, and the provision of a reinforcing layer.

  Although the best configuration, method and the like for carrying out the present invention have been described in the above embodiments, the present invention is not limited to these. That is, the present invention allows those skilled in the art to make various modifications to the embodiments described above in terms of shape, material, quantity, and other detailed configurations without departing from the scope of the technical idea and object. Can do.

  According to the present invention, it is possible to provide a connecting hardware that can improve any of out-of-plane rigidity, bending rigidity, and energy absorption characteristics with a very simple configuration.

DESCRIPTION OF SYMBOLS 1,301,401,501 Connection metal | hardware 2Web 2X Interposition part 3,3A Flange 21,22,22A Slit hole 25 Damper piece 26 Damper part 28 2nd connection part 31 Construction part 32 Frame edge part 57 Drill screw 91 Anchor bolt 92 Steel pipe 105 Nut 169 Channel steel

Claims (7)

A connecting hardware that connects a pair of target members and exhibits energy absorption performance according to the relative displacement between these target members,
A web connected to one of the respective target members, the web, and provided at both ends of a direction crossing the direction of the relative displacement, a pair of flanges which are connected to the other of each of said target member A channel steel with a first connecting part ;
The web
The damper piece formed in a row in the intersecting direction is plastically deformed according to the relative displacement, thereby exhibiting the energy absorption performance,
An intervening portion provided between the damper portion and each flange;
A second connecting portion that is provided between the damper pieces formed in a plurality and connected to the one target member;
Having
A pair of frame edges assigned including the interposition part and the flange;
These frame edges, and a said bridging portion assigned to the web to bridging between the ends of the relative displacement direction;
Connected hardware characterized by that.   The connecting hardware according to claim 1, wherein a width dimension of each damper piece at a central portion in the intersecting direction is smaller than a width dimension at both ends of the central portion. When viewed from the front of the web portion, the width dimension of the intervening portion and s, the width of the end portion of the intermediate portion side of the damper piece is taken as d _2, satisfying the following formula (1) The connection metal fitting according to claim 1 characterized by things.
√3 / 4 × d ₂ ≦ s (1)   The connection hardware according to claim 1, wherein a connection position with respect to the one target member is assigned to a continuous portion between the damper pieces.   A pair of connecting hardware according to claim 1, having a shape in which the edges of the flanges of the connecting hardware are butted together and are rectangular when viewed in a cross section perpendicular to the direction of the relative displacement. Connected hardware characterized by having a shaped steel.   It has transformation induction plasticity, The connection metal fitting of any one of Claims 1-5 characterized by the above-mentioned.   7. The metal joint according to claim 6, wherein a reinforcing layer is formed on the surface by hot dip galvanizing, electrogalvanizing, or electrodeposition coating.