JP6368545B2 - Damping element - Google Patents

Description

  The present invention relates to a vibration damping element.

  Patent Document 1 discloses a technique related to a steel shear wall that absorbs energy input to a structure during an earthquake as hysteresis energy due to plastic deformation.

  Patent Document 2 discloses a technique related to a vibration control wall in which a steel plate having a large number of through holes provided in a substantially lattice shape is sandwiched and fixed between plate members.

  However, such a shear wall or damping wall absorbs energy and obtains a damping force by plastic deformation of the wall itself, so if the wall is installed in the frame and the frame's strength increases, the frame's rigidity increases. End up. When the rigidity of the frame increases, the rigidity distribution of the entire building changes, and there is a possibility that a portion having relatively low rigidity and concentrated deformation may occur.

JP-A-11-181923 JP 2003-172040 A

  In view of the above-described facts, an object of the present invention is to improve the earthquake resistance of a frame while suppressing an increase in the rigidity of the frame.

The invention according to claim 1 is arranged along the vertical direction in the frame and arranged vertically or horizontally in the frame, and is arranged along the horizontal direction in the frame and is rotatable with the vertical material. One connected or vertically arranged cross member, a connecting member for rotatably connecting at least one end of the vertical member and the cross member to the frame, the vertical member and the cross member Energy absorbing means for absorbing rotational energy at the connecting portion of the connecting portion , wherein the energy absorbing means abuts the longitudinal member and the cross member at the connecting portion, and is frictionally joined rotatably by bolt fastening. A bolt that is provided between the abutment surface and the longitudinal member and the transverse member at the connecting portion and rotatably connects the two is inserted, and is plastically deformed joined to the longitudinal member and the transverse member. Provided in the steel pipe and the connecting part A rotary damper which is at least one.

  In the first aspect of the present invention, the vertical members are arranged along the vertical direction, and the horizontal members are arranged along the horizontal direction. The vertical member and the cross member are rotatably connected to at least one end portion of the vertical member and the cross member at the connecting portion between the vertical member and the cross member. Therefore, the rigidity of the frame does not increase or hardly increases.

  When the frame is displaced in the horizontal direction, the energy absorption means provided at the connection part absorbs and dampens the rotational energy when the vertical member and the cross member rotate relatively at the connection part between the vertical member and the cross member. .

  Therefore, the increase in the rigidity of the frame is suppressed, and the earthquake resistance of the frame is improved.

Invention of Claim 2 is arranged along the up-and-down direction in a frame, and the vertical member arranged in one or the left-right direction, and the connecting member which connects the both ends of the vertical member to the frame rotatably, Energy absorbing means for absorbing rotational energy at a connecting portion between the longitudinal member and the connecting member , wherein the energy absorbing means abuts the longitudinal member and the connecting member at the connecting portion, and is bolt-fastened. A contact surface that is rotatably frictionally joined by a bolt, and a bolt that is provided between the vertical member and the connecting member at the connecting portion and rotatably connects the both, and the vertical member and the connecting member And at least one of a plastically deformed steel pipe and a rotary damper provided at the connecting portion.

  In the invention described in claim 2, since the longitudinal members are arranged along the vertical direction and are rotatably connected at the connection portion with the frame, the rigidity of the frame does not increase or hardly increases. When the frame is displaced in the horizontal direction, the energy absorbing means provided at the connecting portion absorbs and dampens the rotational energy when the vertical member rotates at the connecting portion between the longitudinal member and the connecting member. Therefore, an increase in the rigidity of the frame is suppressed, and the earthquake resistance of the frame is improved.

The invention of claim 3 is arranged in the frame in the left-right direction, and the cross members arranged in one or the vertical direction, and a connecting member for rotatably connecting both ends of the cross member to the frame, Energy absorbing means for absorbing rotational energy at a connecting portion between the cross member and the connecting member , wherein the energy absorbing means is in contact with the cross member and the connecting member at the connecting portion, and is bolt-fastened. A contact surface that is rotatably frictionally joined by the bolt, and a bolt that is provided between the cross member and the connecting member at the connecting portion and rotatably connects the both, and the cross member and the connecting member And at least one of a plastically deformed steel pipe and a rotary damper provided at the connecting portion.

  In the invention described in claim 3, since the cross member is disposed along the left-right direction and is rotatably connected at the connection portion with the frame, the rigidity of the frame does not increase or hardly increases. When the frame is displaced in the horizontal direction, the energy absorption means provided at the connection part absorbs and dampens the rotational energy when the cross member rotates at the connection part between the cross member and the connecting member. Therefore, an increase in the rigidity of the frame is suppressed, and the earthquake resistance of the frame is improved.

According to a fourth aspect of the present invention, the energy absorbing means is the steel pipe, and the protrusions formed at both ends of the steel pipe engage with the engagement holes formed in the mating counterpart, so that both The damping element according to any one of claims 1 to 3, wherein the damping element is joined.

  According to the present invention, it is possible to improve the earthquake resistance of the frame while suppressing an increase in the rigidity of the frame.

It is a front view which shows the damping wall which concerns on one Embodiment of this invention. It is sectional drawing which shows the connection part of the gusset plate provided in the frame, and a vertical member. It is a disassembled perspective view which shows the connection part of a vertical member and a horizontal member. The connection part of a vertical member and a horizontal member is shown, (A) is a front view, (B) is sectional drawing. It is a front view for demonstrating the behavior of the damping wall when the frame shown in FIG. 1 carries out horizontal displacement. It is a graph which shows the hysteresis loop of the energy absorption by the steel pipe when the frame shown in FIG. 1 is displaced horizontally. The modification of the connection part of a vertical member and a cross member is shown, (A) is a front view, (B) is sectional drawing. It is a front view which shows the damping wall which has an opening part. It is a front view which shows the damping wall where the cross member is not connected. It is a front view which shows the damping wall comprised only with the vertical member.

<Embodiment>
A damping wall according to an embodiment of the present invention will be described. In each figure, an arrow X indicates a horizontal direction, an arrow Z indicates a vertical direction, and an arrow Y indicates a direction orthogonal to the X direction and the Y direction, that is, an out-of-plane direction of the damping wall. Moreover, although this embodiment demonstrates by the example which performs earthquake-proof reinforcement with respect to the existing building using the damping wall which concerns on one Embodiment of this invention, it is not limited to this. The present invention can also be applied to newly built buildings.

  As shown in FIG. 1, a damping wall 50 as an example of a damping element is within the frame of the frame 11 surrounded by the left and right columns 12L and 12R and the upper and lower beams 14U and 14L constituting the building 10. Is provided. The damping wall 50 includes a longitudinal member 30, a transverse member 40, and four gusset plates 60 as an example of a connecting member. The four gusset plates 60 are respectively joined to the upper beam 14U, the lower beam 14L, the left column 12L, and the right column 12R.

  As shown in FIG. 2, the gusset plate 60 has a T-shaped cross section composed of a joining plate 62 and a connecting plate 64. And the joining plate 62 of the gusset plate 60 is joined to the upper beam 14U by the anchor 16 of the post-construction. In addition, although illustration is abbreviate | omitted, the joining plate 62 of the gusset plate 60 is each joined also to the lower beam 14L, the left pillar 12L, and the right pillar 12R with the anchor 16 of post-processing.

  As shown in FIG. 1, the longitudinal member 30 and the transverse member 40 are made of a long steel plate. The longitudinal member 30 is disposed in the groove surface of the frame 11 with the vertical direction (vertical direction in the present embodiment) as the longitudinal direction, and the longitudinal end portion 30A is rotatably coupled to the coupling plate 64 of the gusset plate 60 (pin (The connection structure will be described later). On the other hand, the cross member 40 is arranged in the groove surface of the frame 11 with the left-right direction (horizontal direction in the present embodiment) as the longitudinal direction, and the end 40A in the longitudinal direction is rotatably connected to the connecting plate 64 of the gusset plate 60. (Pin joint) (the connection structure will be described later).

  As described above, the longitudinal member 30 and the transverse member 40 are arranged in a lattice shape when viewed from the front (when viewed in the out-of-plane direction), and the end portions 30 </ b> A and 40 </ b> A are rotatable to the frame 11 by the gusset plate 60. Are connected (pin joined) to each other. The vertical member 30 and the horizontal member 40 are rotatably connected (pin-joined) at each connection portion 35 where the vertical member 30 and the horizontal member 40 are connected to each other (the connection structure will be described later). To do).

  As shown in FIGS. 3 and 4, between the vertical member 30 and the horizontal member 40 in the connection portion 35 (see also FIG. 1) where the vertical member 30 and the horizontal member 40 intersect and are connected, there is a cylindrical shape. A steel pipe 100 is provided. Protrusions 102 are formed at both ends in the axial direction (Y direction) of the steel pipe 100. Further, engagement holes 32 and 42 are respectively formed in the vertical member 30 and the horizontal member 40 in the connecting portion 35, and the protrusion 102 of the steel pipe 100 is engaged with the engagement holes 32 and 42.

  In addition, rotation holes 34 and 44 are formed in the vertical member 30 and the cross member 40 in the connection portion 35, and a bolt 120 is inserted into the rotation holes 34 and 44, and a nut 122 is screwed. The bolt 120 is inserted through the steel pipe 100.

  With such a configuration of the connecting portion 35, the vertical member 30 and the horizontal member 40 are rotatably connected using the bolt 120 as a rotation axis, and the vertical member 30 and the horizontal member 40 are relatively connected using the bolt 120 as a rotation axis. , The steel pipe 100 is plastically deformed and rotational energy is absorbed.

  As shown in FIG. 2, in this embodiment, the connection portion 37 between the end 30A of the vertical member 30 (see also FIG. 1) and the connection plate 64 of the gusset plate 60 is also laterally connected to the vertical member 30 shown in FIG. The structure is the same as that of the connecting portion 35 with the material 40. Moreover, although illustration is abbreviate | omitted, in this embodiment, the connection part 39 of the edge part 40A of the cross member 40 shown in FIG. 1 and the connection plate 64 of the gusset plate 60 is also the vertical member 30 and the cross member 40 shown in FIG. It has the same structure as the connection part 35.

  Therefore, the vertical member 30 and the horizontal member 40 and the connecting plate 64 of the gusset plate 60 are rotatably connected, and the vertical member 30 and the horizontal member 40 rotate around the bolt 120 (see FIG. 2) as a rotation axis. Thus, the steel pipe 100 (see FIG. 2) is plastically deformed, and rotational energy is absorbed.

(Function and effect)
Next, functions and effects of the present embodiment will be described.

  The longitudinal member 30 and the transverse member 40 constituting the damping wall 50 are rotatably connected (pin jointed) at the connecting portions 37 and 39 with the gusset plate 60 provided with the longitudinal end portions 30A and 40A on the frame 11. At the same time, the longitudinal member 30 and the transverse member 40 are rotatably connected (pin joined) at a connecting portion 35 where they intersect.

  The vertical member 30 is disposed with the vertical direction as the longitudinal direction, and the transverse member 40 is disposed with the horizontal direction as the longitudinal direction. Therefore, even if the frame 11 is displaced in the horizontal direction in FIG. 5 (the horizontal displacement from left to right is shown as an example in FIG. 5), the vertical members 30, the cross members 40, and the connection portions 37 between the gusset plates 60 and the connections are connected. Since the length between the parts 39 does not change or hardly changes, the compressive force and the tensile force do not act or hardly act on the longitudinal member 30 and the transverse member 40.

  Therefore, even if the damping wall 50 is provided on the frame 11, the rigidity of the frame 11 does not increase or hardly increases.

  However, as shown in FIG. 5, when the frame 11 is displaced in the horizontal direction, the longitudinal member 30 and the transverse member 40 rotate relative to each other at the connecting portion 35 between the longitudinal member 30 and the transverse member 40, thereby The steel pipe 100 provided in the part 35 is plastically deformed and absorbs rotational energy to suppress vibration.

  Furthermore, in this embodiment, when the frame 11 is displaced in the horizontal direction, the longitudinal member 30 and the transverse member 40 are rotated with respect to the connecting plate 64 of the gusset plate 60, so that the steel pipe 100 is similarly plastically deformed and rotational energy. Absorbs and suppresses vibration.

  6 shows an energy absorption history loop (history energy) by plastic deformation of the steel pipe 100 when the horizontal axis is the angle (displacement) γ of the column 12L shown in FIG. 5 and the vertical axis is the horizontal force (load) Q. ).

  As described above, by providing the damping wall 50 on the frame 11, the strength of the frame 11 is improved while suppressing an increase in rigidity of the frame 11. Further, even if the damping wall 50 is provided on the frame 11, the rigidity of the entire building 10 does not change or hardly changes. Therefore, even if the damping wall 50 is provided on the frame 11, the rigidity is relatively low in the building 10 and stress is concentrated. The generation | occurrence | production of the site | part which does is prevented or suppressed.

  In addition, since the damping wall 50 is assembled by bolt fastening, except for joining the gusset plate 60 to the frame 11, assembly and disassembly are easy. In addition, the damping wall 50 of the present embodiment is configured by a plurality of narrow constituent members (vertical members 30, cross members 40, gusset plates 60, etc.) and a plurality of small constituent members (steel pipes 100, bolts 120, etc.). ing. Therefore, in a state in which the damping wall 50 is disassembled (a state in which the vertical member 30 and the cross member 40 are not assembled), the inside of the building 10 can be easily transported to the frame 11 and the damping wall 50 can be assembled. So construction is easy. Moreover, the proof stress can be easily recovered by exchanging the plastically deformed steel pipe 100.

  In addition, the proof stress (damping performance) can be easily changed by replacing (changing) the steel pipes with different strengths (for example, with different wall thicknesses).

  In addition, the damping wall 50 according to the present embodiment is portable and has a structure in which the proof stress (damping performance) can be easily changed (adjusted). It is particularly suitable for seismic reinforcement of the building 10.

<Modification>
Next, a modification of this embodiment will be described.

(Energy absorption means)
In the said embodiment, the steel pipe 100 as an example of an energy absorption means is respectively connected to the connection part 35 of the vertical member 30 and the cross member 40, and the connection parts 37 and 39 of the vertical member 30, the cross member 40, and the gusset plate 60. Although provided, it is not limited to this.

  For example, the steel pipe 100 (energy absorption means) may be provided only at the connection portion 35, and the steel pipe 100 (energy absorption means) may not be provided at the connection portions 37 and 39. Moreover, the steel pipe 100 (energy absorption means) does not need to be provided at all of the plurality of connecting portions 35. You may increase / decrease suitably the location which provides the steel pipe 100 (energy absorption means) according to the proof stress (damping performance (energy absorption performance)) required. Moreover, the proof stress (damping performance) can be adjusted by adjusting the location where the steel pipe 100 (energy absorbing means) is provided.

  Moreover, in the said embodiment, the steel pipe 100 provided in the connection part 35 of the vertical member 30 and the cross member 40 and the connection parts 37 and 39 of the vertical member 30, the cross member 40, and the gusset plate 60 is plastically deformed. Absorbed rotational energy and damped. However, the energy absorbing means is not limited to such a configuration.

  For example, a deformable member other than the steel pipe 100 that absorbs energy by plastic deformation may be used.

  Further, as shown in FIG. 7, the vertical member 30 and the horizontal member 40 are brought into contact with each other, and bolts are fastened (friction joined) with bolts 120 and nuts 122. A structure that absorbs energy and suppresses vibration by a frictional force caused by friction between the contact surface 30D and the contact surface 40D during rotation may be used. In addition, although illustration is abbreviate | omitted, it is good also as the same structure also in the connection parts 37 and 39 of the vertical member 30, the horizontal member 40, and the gusset plate 60. FIG. Further, the proof stress (damping performance) can be easily adjusted by adjusting the fastening force (frictional force) of the bolt fastening. Further, a friction adjusting material that adjusts the frictional force may be sandwiched between the contact surface 30D and the contact surface 40D.

  In addition, although not shown, a rotary damper that absorbs energy by hydraulic resistance or the like may be provided in the connection portions 35, 37, and 39. In short, any structure that absorbs rotational energy (energy absorbing means) may be used.

(Arrangement structure of vertical and horizontal members)
In the said embodiment, although the vertical member 30 and the horizontal member 40 were arrange | positioned at the grid | lattice form, it is not limited to such an arrangement structure.

  As shown in FIG. 8, some vertical members 30 and cross members 40 may be shortened to form an inverted U-shaped opening 15 that can be used as an entrance. Moreover, you may form the opening part 17 which can be utilized as a window opening or equipment opening like an imaginary line (two-dot broken line). Although illustration is omitted, the opening may be formed by leaving a gap between the end of the damping wall in the left-right direction (the vertical member 30 disposed at the left end or the right end) and the pillars 12R, 12L. Or you may form an opening part by opening a space | interval between the edge part (the cross member 40 arrange | positioned at an upper end or a lower end) and the beam 14U, 14L of the up-down direction of a damping wall. In addition, in this way, the damping wall of the present embodiment can freely set the position and size of the opening.

  In the above embodiment, the end portions 30A and 40A of both the vertical member 30 and the horizontal member 40 are rotatably connected to the frame 11 by the gusset plate 60, but the present invention is not limited to this.

  For example, as shown in FIG. 9, the end 30 </ b> A of the longitudinal member 30 may be rotatably connected to the frame 11, and the end 40 </ b> A of the cross member 40 may not be connected to the frame 11. Although not shown in the figure, the end 40A of the cross member 40 is connected to the frame 11 so as to be rotatable, and the end 30A of the vertical member 30 may not be connected to the frame 11. The point is that at least one end of at least one of the longitudinal member 30 and the transverse member 40 may be rotatably connected (pin-joined) to the frame 11.

  Moreover, in the said embodiment, although the vertical member 30 and the horizontal member 40 were the structures in which all were provided, it is not limited to this. A structure in which only one or both of the longitudinal member 30 and the transverse member 40 are provided may be employed.

  Moreover, in the said embodiment, although the damping wall (damping element) was comprised with both the vertical member 30 and the cross member 40, it is not limited to this. For example, as shown in FIG. 10, the vertical member 30 may be used alone. Moreover, although illustration is abbreviate | omitted, you may be comprised only with the crosspiece 40. FIG.

  Moreover, in the said embodiment, although the vertical member 30 is arrange | positioned along the perpendicular direction and the cross member 40 is arrange | positioned along the horizontal direction, it is not limited to this. The vertical member 30 may be disposed with an angle with the vertical direction, and the cross member 40 may be disposed with an angle with the horizontal direction. As the angle increases, when the frame 11 is horizontally displaced as shown in FIG. 5, the compressive force and tensile force acting on the vertical members 30 and the horizontal members 40 increase, and the rigidity of the frame 11 increases. Therefore, it may be set as appropriate so as to keep the angle within a range in which the increase in rigidity of the frame 11 is allowed.

  Here, the building frame is designed in accordance with the purpose of the building by arranging seismic elements such as seismic walls and braces in a plan view in a well-balanced manner on the surface between the columns. In particular, when improving the strength of existing buildings, the placement of seismic elements is limited due to the seismic elements of existing buildings and the limitations of the floor plan, and seismic elements already installed in existing buildings, etc. While taking into consideration, it is also necessary to consider the balance of rigidity (seismic resistance) of the entire building.

  Therefore, when arranging the seismic elements according to the present invention on the construction surface between the columns in plan view, a plurality of seismic elements according to the construction surface to be arranged (sequentially or dispersedly arranged), and each energy absorption The purpose is to balance the rigidity (seismic resistance) of the entire building by adjusting the performance (damping performance).

  Also, adjust the number and ratio of each of the connecting parts (pin joints) of vertical and horizontal members that are rotatably connected to the frame by connecting members, and the energy absorbing means (connecting parts) that absorb the rotational energy. By doing so, the proof stress (damping performance) of the frame can be easily adjusted.

<Others>
In addition, this invention is not limited to the said embodiment and modification.

  For example, in the said embodiment, although the projection part 102 of the steel pipe 100 engaged with the engagement holes 32 and 42, it was the structure where rotational force is transmitted to the steel pipe 100, However, It is not limited to this. For example, a structure in which a rotational force is transmitted by welding a steel pipe may be used.

  For example, in the above-described embodiment, the vertical member 30 and the horizontal member 40 are rotatably connected (pin-joined) to the gusset plate 60 provided on the frame 11, but are not limited thereto. The vertical member and the cross member may be rotatably connected (pin bonded) to the frame by a connecting member other than the gusset plate.

  In the above-described embodiments and modifications, “rotatably connect (pin joint)” means energy absorbing means (specifically, plastic deformation of the steel pipe 100, and the contact surface 30D and the contact surface 40D at the connection part. The frictional force between the two is not provided. For example, in FIG. 3 and FIG. 4, the protrusion 102 and the engagement holes 32 and 42 are not formed (a structure in which the steel pipe 100 is not plastically deformed even when rotated), or in FIG. And a contact surface 40D between which a low frictional resistance sheet material (sliding material) such as fluororesin (Teflon (registered trademark)) is sandwiched (structure with very small frictional force (frictional resistance)) .

  Moreover, in the said embodiment and modification, although the vertical member 30 and the horizontal member 40 were comprised with the elongate steel board | plate material (flat bar), it is not limited to this. For example, you may be comprised with angle shape steel.

Moreover, the said embodiment and modification can be implemented in combination as appropriate.
Furthermore, it cannot be overemphasized that it can implement with a various aspect in the range which does not deviate from the summary of this invention.

DESCRIPTION OF SYMBOLS 10 Building 11 Frame 30 Vertical member 30A End part 35 Connection part 37 Connection part 39 Connection part 40 Cross member 40A End part 50 Damping wall (an example of damping element)
60 Gusset plate (an example of a connecting member)
100 steel pipe (an example of a deformable member)

Claims (4)

Longitudinal members arranged along the vertical direction in the frame and arranged in one or the left-right direction;
One horizontal member arranged in the left-right direction in the frame, and connected to the vertical member in a rotatable manner, or a horizontal member arranged in the vertical direction,
A connecting member that rotatably connects at least one end of at least one of the longitudinal member and the transverse member to the frame;
Energy absorbing means for absorbing rotational energy at the connecting portion between the longitudinal member and the transverse member;
Equipped with a,
The energy absorbing means is
In the connection part, the vertical member and the cross member are in contact, and a contact surface that is friction-bonded rotatably by bolt fastening,
A steel pipe that is provided between the vertical member and the cross member in the connection portion, is inserted through a bolt that rotatably connects both, and is plastically deformed and joined to the vertical member and the cross member,
A rotary damper provided at the connecting portion;
Is at least one of
Damping element. Longitudinal members arranged along the vertical direction in the frame and arranged in one or the left-right direction;
A connecting member that rotatably connects both ends of the longitudinal member to the frame;
Energy absorbing means for absorbing rotational energy at the connecting portion between the longitudinal member and the connecting member;
Equipped with a,
The energy absorbing means is
In the connecting portion, the vertical member and the connecting member are in contact with each other, and a contact surface that is rotatably friction-joined by bolt fastening;
A steel pipe that is provided between the vertical member and the connecting member in the connecting portion, is inserted through a bolt that rotatably connects both, and is plastically deformed and joined to the vertical member and the connecting member;
A rotary damper provided at the connecting portion;
Is at least one of
Damping element. Cross members arranged along the left-right direction in the frame, arranged one or vertically,
A connecting member that rotatably connects both ends of the cross member to the frame;
Energy absorbing means for absorbing rotational energy at the connecting portion between the cross member and the connecting member;
Equipped with a,
The energy absorbing means is
In the connecting portion, the cross member and the connecting member are in contact with each other, and a contact surface that is rotatably frictionally joined by bolt fastening;
A steel pipe that is provided between the cross member and the connecting member in the connecting portion, is inserted through a bolt that rotatably connects the two, and is plastically deformed and joined to the cross member and the connecting member;
A rotary damper provided at the connecting portion;
Is at least one of
Damping element. The energy absorbing means is the steel pipe,
The protrusions formed at both ends of the steel pipe are engaged with the engagement holes formed in the bonding partner, so that both are bonded.
The damping element according to any one of claims 1 to 3.