JP3760296B2 - Viscous damping wall mounting structure and mounting method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mounting structure and a mounting method for a viscous damping wall, and in particular, improves the mounting structure with the main body structure, and the viscous damping that can be manufactured at low cost while having a simple joint structure and sufficient strength. The present invention relates to a wall mounting structure and a mounting method thereof.
[0002]
[Prior art]
In order to improve the seismic safety of building structures and improve the living performance of structures against wind and other dynamic external forces, measures have been taken for a long time to increase the damping performance of structures. As a concrete solution, viscous damping walls have been put into practical use, and in recent years their adoption has been increasing.
The shear wall of the viscous system integrates a box on the upper floor composed of a steel side plate on the base plate and flange plates on both sides of it into the lower floor beam, and the upper floor beam inside it. And a viscoelastic body or viscoelastic body is sandwiched between them by a predetermined thickness.
In order to incorporate the damping wall into the building, it is necessary to make a connection with the main body structure. However, the joint hardware from the main body structure to be combined with the current viscous damping wall includes many rib plates. This is a complicated joint, which increases the cost.
[0003]
Referring to FIG. 5, the conventional interaction between the viscous damping wall and the main body structure will be described. The base plate 32 of the box 31 constituting the damping wall 30 is a flange of the raised hardware 34 provided on the lower beam 33. The middle plate 35 of the damping wall is welded with a top plate 36 at its tip, and is bolted to the flange surface of the mounting hardware 38 provided on the upper floor beam 37.
In this state, when the damping wall 30 bears a horizontal force due to an external force, a bending moment due to a shearing force is generated on the top plate 36 and the base plate 32 at the upper and lower ends.
The stress acting on the joint acts as a shearing force in the horizontal direction on the bolt on the joint surface, and at the same time, the vertical axis is a large distribution at the edge of the damping wall 30 due to the bending moment. Power is generated. As a result, a large bending stress is generated in the top plate 36 and the base plate 32 having the bolt holes arranged horizontally, and a corresponding measure is required for each plate.
[0004]
As a result, as shown in the drawing, a large number of vertical rib plates 39, 40 are installed on the base plate 32, the top plate 36, the raised metal fitting 34, and the mounting hardware 38 corresponding to the base plate 32, the top plate 36, and particularly the edge portion of the damping wall. In this case, enormous reinforcement was applied, resulting in an enormous cost increase and an obstacle to the contact with the member orthogonal to the beam and the equipment sleeve through hole.
The amount of damping performance that can be added to the structure is proportional to the number of damping walls to be placed, so many applications are desired. However, the cost of equipment is also proportional to the quantity used, so the cost of the damping wall construction method It is an important issue to reduce the amount of damage and prevent other construction work from being adversely affected.
[0005]
In order to solve this problem, a construction method in which all the upper and lower flange portions are removed has also been proposed. (See JP 10-46865)
In this proposal, as shown in the figure, an inner wall steel plate 51 of a vibration control wall 50 to be fixed under an upper floor side beam or a bolt fixing steel plate 52 having the same thickness as that of a reinforced part is provided, and the vibration control is directly below. The wall inner wall steel plate 51 is arranged, bolt fixing plates 53 and 53 are arranged on both sides thereof, and the three steel plates are fastened and integrated with a high strength bolt 54.
On the lower floor side, a bolt fixing lower steel plate 56 is welded under the damping wall outer wall steel plate 55, and a steel plate 57 having the same thickness as the bolt fixing lower steel plate 56 is placed on the lower floor side beam. It is provided and integrated with the upper side.
As described above, the structure that eliminates the flange connection in the upper and lower parts streamlines the stress transmission mechanism and simplifies the manufacture of the damping wall itself and the fixed part, greatly increasing the cost required for the entire damping wall construction method. Insist that it can be reduced.
[0006]
However, in this proposed damping wall, a special steel plate for fixing bolts is provided on the damping wall itself, and at the same time, an upper reinforcing part is provided on the inner wall steel plate. A structure in which a large number of bolts are arranged on the end side of the wall is adopted. These structures are a natural consequence of the fact that the lower steel plate for bolt fixing and the inner wall steel plate must withstand both shearing force and tensile force at the same time against the bending moment generated in the damping wall. The steel plate also has a considerable thickness, and the cost of the damping wall itself is not much different from the conventional one.
Also, regarding the handling of the damping wall, since it is a structure that cannot stand on its own, special considerations are required in terms of safety and workability in each situation of transportation, storage, and field setting.
[0007]
[Problems to be solved by the invention]
The present invention provides a mounting structure and a mounting method for a viscous damping wall that can be manufactured at low cost while improving the joint structure when the viscous damping wall is attached to the main body structure and having a simple and sufficient strength. It is to provide.
[0008]
[Means for Solving the Problems]
The attachment structure of the viscous damping wall according to the present invention is basically a box body in which a steel side plate is placed on a base plate, flange plates are arranged on both sides thereof, and an upper end is opened. A base plate joint hole and a flange joint plate are provided on the flange of the lower floor beam, and a base plate joint hole and a flange joint plate are installed on the flange of the lower floor beam to attach a viscous damping wall constructed by inserting a plate and inserting a viscous body or viscoelastic body into the gap portion. It is characterized in that the middle plate is directly joined to the gusset plate attached to the flange of the upper floor beam. Specifically, a raised hardware is installed on the flange of the lower floor beam, and the base plate joint hole And flange joint plate, and the flange plate and flange joint plate are joined by a high-strength bolt single-surface friction joint. Junction is characterized in that a high-strength bolts dihedral friction bonding using high-strength bolts one surface friction joint or splice plates.
The above structure eliminates the need for top plates, brackets, and reinforcing rib plates for each part used in the vibration control wall construction method, reduces the plate thickness and the number of bolts of the base plate, and stabilizes itself, resulting in construction safety. Improve workability and workability.
[0009]
In addition, the method of attaching the viscous damping wall according to the present invention comprises attaching a lower floor beam having a base plate joining hole and a flange joining plate, then joining to a gusset plate having an intermediate plate and temporarily suspending the box. Set the upper floor beam that integrates the viscous damping wall with a piece in a predetermined position, and temporarily attach the base plate and flange plate to the base plate joint hole and flange joint plate of the lower floor beam by high-strength bolt friction Since it is characterized by removing pieces, it is easy to handle, can prevent shearing deformation of viscous materials, and also prevents movement of the damping wall.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
1A and 1B are an elevation view and a cross-sectional view taken in the direction of an arrow when the viscous damping wall according to the present invention is attached to the main body structure.
The viscous damping wall 1 is disposed in a structural surface 5 composed of columns 2 and 2, a lower beam 3 and an upper beam 4, and is joined to the lower beam 3 and the upper beam 4, respectively. ing.
The viscous damping wall 1 may be placed directly on the lower floor beam 3 having the base plate joining hole and the flange joining plate, but in this embodiment, a raised metal fitting is provided for the reason described later. Explain with things.
A flange joint plate 7 is welded to the raised hardware 6 welded to the flange surface of the lower floor large beam 3, and is integrated with the lower floor large beam 3. The use of the raised hardware 6 does not damage the base material of the lower floor beam 3 with bolt holes, etc., and the work surface of the high-strength bolt friction joint of the viscous damping wall 1 is placed on the floor slab. Therefore, there is an effect of facilitating the replacement work when it is necessary to replace the viscous damping wall 1.
The interval between the flange joining plates 7 and 7 is made slightly larger than the outer width of the viscous damping wall 1 so that the gap can be adjusted when mounting on the site.
[0011]
The viscous damping wall 1 is placed on a raised metal fitting 6, and the base plate 8 of the viscous damping wall and the base plate joint hole 9 of the raising hardware 6 are frictionally joined on one surface with a high-strength bolt 10, and the same viscosity is obtained. The viscous damping wall 1 and the lower floor large beam 3 are joined together by friction-joining the flange plate 11 and the flange joining plate 7 on both sides of the system damping wall with one high-strength bolt 10.
The flange joint plate 7 utilizes the fact that the bending moment generated by the shear force that the viscous damping wall 1 bears during an earthquake becomes a vertical force at the flange plate 11 portions on both sides of the viscous damping wall. Thus, it is treated as a shearing force of a high-strength bolt, which suppresses and damps the lifting force of the base plate and the vertical force that is greatly generated at the edge of the viscous damping wall.
Therefore, the base plate 8 of the viscous damping wall 1 and the base plate joint hole 9 of the raised hardware 6 have the same base plate type as the conventional one, but unlike the conventional viscous damping wall, the joint bolt is pulled. Since no force is generated, there is no need for a reinforcing rib plate, and a simple joint state with a thin plate thickness is formed.
[0012]
A gusset plate 12 is attached to the lower flange surface of the upper floor beam 4 by welding in the same row as the web of the beam.
The middle plate 13 of the viscous damping wall 1 is sandwiched between two splice plates 14 together with the gusset plate 12 for direct joining to the gusset plate 12 and is frictionally joined to the two surfaces by the high-strength bolts 10. The seismic wall 1 and the upper floor girder 4 are joined together by this.
The direct joining between the gusset plate 12 and the intermediate plate 13 is to remove the top plate provided on the conventional intermediate plate and the bracket suspended from the upper floor large beam, so that the height of the viscous damping wall is increased. It is possible to improve the damping performance by increasing the shear area of the viscous damping material.
At both ends of the gusset plate 12, flange plates having screw holes for attaching temporary suspension pieces to be described later are provided in a direction perpendicular to the beam web of the upper floor large beam.
[0013]
FIG. 2 is a perspective view of the viscous damping wall.
As shown in the figure, the viscous damping wall 1 has a box body 16 having a steel side plate 15 on a base plate 8 and flange plates 11 arranged on both sides thereof to open the upper end. An intermediate plate 13 is inserted in the middle. A gap or a viscoelastic body is sandwiched in the gap between the box 16 and the intermediate plate 13 so as to attenuate a horizontal force applied from the outside between the base plate 8 and the intermediate plate 13. .
The base plate system is stable and independent during transportation, storage, and site setting, improving construction safety and facilitating site work.
[0014]
Although the base plate 8 appears to be the same as the conventional viscous damping wall, it does not need to withstand the vertical force as described above, so there is no need to provide a reinforcing rib plate and the plate thickness is thin. It has a simple shape.
The base plate 8 and the flange plate 11 are provided with bolt holes 17 and 18 for high-strength bolts for one-surface friction bonding with the base plate joining hole and the flange joining plate provided in the raised metal, and the tip of the intermediate plate 13 The part is provided with a bolt hole 19 for a high-strength bolt for two-surface frictional joining with the splice plate 14 when directly joining the gusset plate 12.
[0015]
FIG. 3 shows an embodiment in which the intermediate plate and the gusset plate are joined.
In the present embodiment, the gusset plate 12 and the intermediate plate 13 are directly joined.
That is, the gusset plate 12 and the intermediate plate 13 are sandwiched by two splice plates 14 and are joined by two-surface friction joining with the high-strength bolts 10 arranged in parallel to the splice plate 14. As a result, the system damping wall 1 and the upper floor girder 4 are joined together.
[0016]
The direct joining of the gusset plate 12 and the middle plate 13 does not necessarily require a splice plate, and the welding position of the gusset plate is set so that the web core of the upper beam and the middle plate coincide with each other. By shifting from the web core of the large beam, the gusset plate 12 and the intermediate plate 13 can be directly joined to each other, and one-surface friction welding using a high-strength bolt can also be performed.
The adoption of this one-surface friction joining contributes to cost reduction because it eliminates the use of a splice plate.
[0017]
FIG. 4 shows another embodiment for joining the intermediate plate and the gusset plate.
In this example, there is no special change in the intermediate plate, but the point that the splice plate is divided into the central portion 20 and the side portions 21 and 21 is different. Bolt holes are arranged in one row in the center portion 20 of the splice plate, and two vertical rows of bolt holes are arranged in the side splice plates 21 and 21 to cope with the shear stress shared.
The splitting of the splice plate is not only rational for the stress sharing, but also has the effect of flexibly responding to the difference between the gusset plate and the middle plate that comes from the accuracy of construction in the field. Since the weight can be reduced, it is possible to demonstrate the convenience of being able to work sufficiently with the human power without using special heavy machinery or equipment.
[0018]
FIG. 5 is an exploded view for explaining a method of attaching a viscous damping wall according to the present invention.
The mounting operation starts from mounting the lower-floor large beam 3 integrated by welding the raised hardware 6 to a column not shown in the figure. At this time, a filler plate 22 for adjusting the gap is attached in advance to the flange joining plates 7 at both ends of the raised metal piece 6.
[0019]
On the other hand, a box 16 of the viscous damping wall 1 is attached to the upper floor beam 4 with a temporary suspension piece 23 interposed therebetween, and at the same time, two high-strength bolts using a splice plate 14 on the gusset plate 12 and the intermediate plate 13. Friction bonding is applied to make direct bonding.
The direct joining of the high-strength one-surface friction joining without using the splice plate rice plate is as described above.
The upper floor beam 4 integrated with the viscous damping wall 1 is lifted and set at a predetermined position. However, by using the temporary suspension piece 23, the viscous material is sheared and deformed by its own weight. In addition to being able to prevent this, the viscous damping wall is fixed so as not to move, and the rotation around the beam axis when suspended can be suppressed.
[0020]
Suspension is performed in order to install the viscous damping wall 1 between the flange joint plates 7, 7. At this time, the filler plate 22 attached in advance is taken in and out to make the viscous damping wall Adjust the gap so that it fits comfortably between the flange joint plates.
When positioning is completed, high-force bolt 1 surface friction welding is performed between the base plate 8 and the base plate joining hole 9 and between the flange plate 11 and the flange joining plate 7 to complete the attachment of the viscous damping wall 1 to the main body structure. To do.
At this stage, when the above-described temporary suspension piece 23 is removed, the viscous damping wall 1 becomes movable so that the original damping function can be exhibited, and the construction is completed.
[0021]
FIG. 6 is an elevational view of a state in which the viscous damping walls according to the present invention are arranged in parallel.
The viscous damping walls 1, 1 are arranged in parallel in a structural surface 5 composed of columns 2, 2, a lower beam 3 and an upper beam 4, and a lower beam 3 and an upper beam 4 Are joined together.
The raised hardware 6 welded to the flange surface of the lower floor beam 3 is integrated with the lower floor beam 3 in such a length that the two viscous damping walls 1 and 1 can be placed. Similar to the example of FIG. 1, it is attached to both ends of the raised hardware 6.
[0022]
The viscous damping walls 1, 1 are frictionally joined on one surface between the flange plates 11, 11 on one side facing each other with a high-strength bolt 10, and placed on the raised hardware 6 in an integrated state. is doing.
The viscous damping walls 1 and 1 are friction-bonded to the base plate 8 and the base plate joint hole 9 of the raised hardware 6 with a high-strength bolt 10 on one side, and are joined to the flange plates 11 on both sides of the viscous damping wall. The plate 7 is joined integrally with the lower beam 3 by friction-joining the plate 7 with a high-strength bolt 10.
The flange joint plate 7 receives the bending moment due to the shear force borne by the viscous system damping walls 1, 1 joined together as the shear force of the high-strength bolt, thereby lifting the base plate and the viscous system damping. The vertical force generated at the edge of the wall is processed.
[0023]
Two gusset plates are attached to the lower flange surface of the upper floor beam 4 in the same row as the web of the same beam as in the above example.
The middle plate of each viscous damping wall 1 is sandwiched between two splice plates 14 together with a gusset plate, and is joined to two high-strength bolts by friction. Are joined together.
As described above, the mounting structure of the viscous damping wall according to the present invention is not limited to the mounting of a single viscous damping wall, but also when installing a plurality of viscous damping walls in parallel. Applicable. Any number of juxtaposed damping walls can be handled as a single viscous damping wall by friction-joining the flange plates on the side facing each other with one high-strength bolt. When attaching to the upper floor beams, it is possible to ensure integration with the upper floor beams simply by attaching the temporary suspension piece to the outer flange plate.
[0024]
【The invention's effect】
The mounting structure of the viscous damping wall according to the present invention is a box body in which a steel side plate is placed on a base plate and flange plates are arranged on both sides thereof to open the upper end, and an intermediate plate is inserted into the box body. To install a viscous damping wall composed of a viscous material or viscoelastic material sandwiched in the gap, a base plate joint hole and a flange joint plate are provided in the flange of the lower floor beam, and the base plate and the flange plate are joined to this. Since the middle plate is directly joined to the gusset plate attached to the flange of the upper floor beam, there is no need for the top plate, bracket and reinforcing rib plate for each part used in the damping wall construction method. In addition, it has the effect of reducing the cost by reducing the thickness of the base plate and the number of bolts. The effect of improving the work of can also be exhibited.
Also, the method of attaching the viscous damping wall according to the present invention is to attach the lower floor beam, then join the middle plate to the gusset plate and place the upper floor beam integrated with the temporary suspension piece at a predetermined position. The base plate and the flange plate are characterized by the fact that the temporary suspension piece is removed after the high-strength bolts are friction-bonded to the base plate joint hole and flange joint plate of the lower floor beam. This can prevent the shear deformation of the steel and prevent the vibration control wall from moving.
[Brief description of the drawings]
[Fig. 1] State diagram of the viscous damping wall according to the present invention attached to the main body structure [Fig. 2] Perspective view of the viscous damping wall according to the present invention [Fig. 3] The viscous damping wall to the upper beam Fig. 4 Mounting state diagram of other viscous damping walls for upper floor beams. Fig. 5 Exploding drawing of viscous damping walls according to the present invention. Fig. 6 Multiple viscous dampings according to the present invention. Fig. 7 Mounting state diagram of the seismic wall juxtaposed with the main body structure. Fig. 7 Mounting state diagram of a conventional viscous damping wall. Fig. 8 Mounting status diagram of another conventional viscous damping wall.
DESCRIPTION OF SYMBOLS 1 Viscous system damping wall 5 Construction surface 6 Raised metal 7 Flange joint plate 8 Base plate 9 Base plate joint hole 10 High strength bolt 50 Damping wall 11 Flange plate 51 Inner wall steel plate 12 Gusset plate 52 Steel plate 13 for bolt fixation Middle plate 53 Bolt fixation Supplementary plate 14 Splice plate 54 High-strength bolt 15 Component side plate 55 Damping wall outer wall steel plate 16 Box 56 Lower steel plates 17, 18 and 19 for fixing bolts High-strength bolt hole 57 Steel plate 20 Splice plate central portion 21 Splice plate side portion 22 Filler plate 23 Temporary suspension piece 30 Damping wall 31 Box 32 Base plate 33 Lower floor girder 34 Raised hardware 35 Middle plate 36 Top plate 37 Upper floor girder 38 Mounting hardware 39, 40 Rib plate

Claims (8)

Stand the steel side plate on the base plate and place flange plates on both sides to make the box open at the top, insert the middle plate into the box, and sandwich the viscous or viscoelastic body in the gap This is a mounting structure for a viscous damping wall composed of a gusset in which the base plate and the flange plate are joined to the base plate joint hole and the flange joint plate provided in the flange of the lower floor beam, and are attached to the flange of the upper floor beam. Viscous damping wall mounting structure, characterized in that the intermediate plate is directly joined to the plate. The mounting structure for a viscous damping wall according to claim 1, wherein a base metal joint hole and a flange joint plate are provided by installing a raised hardware on the flange of the lower floor beam. The viscous structure damping wall mounting structure according to claim 1, wherein the flange plate and the flange joint plate are joined by high-strength bolt one-surface friction joint. The attachment structure for a viscous damping wall according to any one of claims 1 to 3, wherein a filler plate is interposed in the flange joining plate. 2. The viscous structure damping wall mounting structure according to claim 1, wherein the direct joining of the intermediate plate and the gusset plate is a high-strength bolt one-surface friction welding. 2. The viscous structure damping wall mounting structure according to claim 1, wherein the direct joining of the intermediate plate and the gusset plate is a high-strength bolt two-surface friction joining using a splice plate. 7. The viscous structure damping wall mounting structure according to claim 6, wherein the splice plate is divided into a central portion and an edge portion. Attach the lower floor beam with the base plate joint hole and the flange joint plate, then join the gusset plate with the middle plate and the upper floor beam that integrates the viscous damping wall with the temporary suspension piece The temporary suspension piece is removed after setting the base plate and the flange plate to the base plate joining hole and the flange joining plate of the lower floor beam and high-strength bolt friction joining. Mounting method applied to the mounting structure of the viscous damping wall.

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