JP2013204284A - Fitting structure for vibration control wall for concrete beam, and a structure body with the structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fitting structure for vibration control wall for concrete beam that has sufficient durability and a large energy absorption amount to obtain sufficient vibration control effects, has small restrictions on the size and capability of the vibration control wall to be installed, causes no problem associated with rust and outward appearance, and can effectively utilize a space.SOLUTION: There is provided a fitting structure 1 for vibration control wall for concrete beam, as a structure for fitting a vibration control wall 2 to concrete beams 41, 50 on an upper floor and a lower floor, such that an upper fitting plate 9 of the vibration control wall 2 is bound to an upper-floor concrete beam 41 and a lower fitting plate 39 of an upper floor-side vibration control wall 62 arranged on the upper floor side by a PC steel rod 3 penetrating the upper-floor concrete beam 41 in a beam height direction, and a lower fitting plate 10 of the vibration control wall 2 is bound to a lower-floor concrete beam 50 by a PC steel rod 4 penetrating a lower-floor concrete beam 50 in a beam height direction. A grout material 6 can be interposed between an upper surface of an upper fitting plate 9 of the first vibration control wall 20 and a lower surface of the upper-floor concrete beam 41 and so on.

Description

  The present invention relates to a structure for attaching a damping wall to a concrete beam such as an RC building, and a structure including the structure.

  In high-rise RC buildings, viscous damping walls (hereinafter referred to as “damping walls”) and viscous dampers are sometimes installed for the purpose of improving earthquake resistance and improving habitability. In this case, there is a need for a structure that can function even during wind fluctuations and small deformations due to small earthquakes, and that does not cause a shift in the attachment part between the damping wall and the concrete beam even in large earthquakes.

  Therefore, in Patent Document 1, a PC structure damping wall is installed between the horizontal beams on the lower floor, and a damping material and joint mortar are interposed between the damping wall and the upper and lower horizontal beams, so that the vibration control wall and the horizontal beams on the upper and lower floors are interposed. And PCaPC frame which realizes a super high-rise building with a PCaPC frame of more than 100 m is described.

  In addition, in the mounting structure of the damping wall to the concrete beam described in Patent Document 2, paying attention to the lack of strength in the tensile direction of the concrete material, a rectangular frame steel frame is interposed without attaching the damping wall directly to the concrete beam. By installing a damping wall, it is possible to suitably prevent the destruction of concrete due to the tensile force during the earthquake and the breakage of attachment of anchors (detachment of anchors).

  Furthermore, the installation structure of the viscoelastic wall described in Patent Document 3 uses an existing reinforced concrete beam to attach the damping wall to an existing reinforced concrete building, and a fastener made of a PC steel bar along the outside of the beam. Since the mounting plate of the damping wall is tightly coupled with the reinforcing material made of H-shaped steel, the damping wall can be constructed without causing any significant damage to the building.

JP 2006-83545 A JP 2001-295497 A JP 2000-73609 A

  However, in the PCaPC frame structure described in Patent Document 1, when the joint portion at the wall end is separated and closed due to the horizontal deformation of the structure, energy is consumed by the expansion and contraction of the damping material interposed therein. Each time deformation occurs, a compressive load is repeatedly applied to the joint material in the vertical direction. For this reason, the joint material is damaged, which leads to a decrease in tension due to the PC steel rod, and there is a problem in terms of durability. In addition, the energy absorption of the PCa damping wall with this structure is due to deformation in the compression direction of the damping material, and the amount of energy absorption is not large, and a sufficient damping effect was not obtained. .

  In addition, the attachment structure of the viscous damping wall to the concrete beam described in Patent Document 2 can maintain and secure the damping performance of the damping wall. However, in order to provide an extra frame steel frame, There is a problem that the space to be arranged is limited, a large damping wall cannot be arranged, and the size and capacity of the arranged damping wall are limited.

  Furthermore, in the technique described in Patent Document 3, the PC steel rod as the fastener is exposed, and there are problems of rust and appearance, and it is effective by providing a reinforcing material made of H-shaped steel. There is a problem that the space cannot be used.

  Therefore, the present invention has been made in view of the above-described problems in the prior art, and has sufficient durability, a large amount of energy absorption, and a sufficient vibration control effect. An object of the present invention is to provide a structure for mounting a vibration control wall on a concrete beam that can use space effectively, with few restrictions on size and capacity, without causing rust and appearance problems.

  In order to achieve the above object, the present invention is a structure for attaching a vibration control wall to concrete beams on an upper floor and a lower floor, wherein the upper mounting plate of the vibration control wall has a beam height of the concrete beam on the upper floor side. A PC steel bar penetrating in the direction is tightly coupled to the concrete beam on the upper floor and the lower mounting plate of the second damping wall disposed on the upper floor side, and the lower mounting plate of the damping wall is It is characterized in that it is tightly coupled to the concrete beam on the lower floor by a PC steel bar penetrating in the beam height direction of the concrete beam on the floor side.

  According to the present invention, the lower mounting plate of the damping wall is tightly coupled with the concrete beam on the lower floor by the PC steel bar penetrating in the beam height direction of the concrete beam on the lower floor side. And has a large amount of energy absorption, provides a sufficient seismic control effect, limits the size and capacity of the seismic control wall to be installed, and does not cause rust and appearance problems, making effective use of space can do.

  In addition to the above, the upper mounting plate of the damping wall is disposed on the concrete beam on the upper floor and the second floor side by a PC steel bar penetrating in the beam height direction of the concrete beam on the upper floor side. Because it is tightly coupled with the lower mounting plate of the damping wall, it is possible to reduce the number of PC steel bars when installing the damping wall on multiple floors and to limit the size and capacity of the damping wall to be installed The space can be used more effectively without causing rust and appearance problems.

  Further, the present invention is a structure for attaching a damping wall to the concrete beams on the upper floor and the lower floor, wherein a lower mounting plate of the damping wall penetrates in the beam height direction of the concrete beam on the lower floor side. The steel bar is tightly coupled to the lower floor concrete beam and the upper mounting plate of the second damping wall disposed on the lower floor side, and the upper mounting plate of the damping wall is connected to the upper floor concrete beam. It is characterized in that it is tightly coupled with the concrete beam on the upper floor by a PC steel bar penetrating in the beam height direction.

  According to the present invention, since the upper mounting plate of the damping wall is tightly coupled with the upper concrete beam by the PC steel bar penetrating in the beam height direction of the upper concrete beam, sufficient durability is achieved. Equipped with a large amount of energy absorption and sufficient seismic control effect, and there are few restrictions on the size and capacity of the seismic control wall to be installed. Can do.

  In addition to this, the lower mounting plate of the damping wall is disposed on the concrete beam on the lower floor and the second floor side by a PC steel bar penetrating in the beam height direction of the concrete beam on the lower floor side. Because it is tightly coupled to the upper mounting plate of the damping wall, when installing damping walls on multiple floors, the number of PC steel bars can be reduced and the size and capacity of the damping wall to be installed are limited. The space can be used more effectively without causing rust and appearance problems.

  In the mounting structure, between the upper surface of the upper mounting plate of the first damping wall and the lower surface of the upper floor concrete beam and / or the lower surface of the lower mounting plate of the first damping wall and the lower floor concrete. A grout material can be interposed between the upper surface of the beam. The grout material can fill the gap between the mounting plate of the first damping wall and the concrete beam, and can increase the coefficient of friction between the mounting plate and the concrete beam.

  Further, the surface roughness of the upper surface of the upper mounting plate of the first damping wall and / or the lower surface of the lower mounting plate of the first damping wall is set to 45 μm (Rz) or more and 72 μm (Rz) or less. Can do. Thereby, the coefficient of friction between the upper and lower mounting plates and the concrete beam can be increased to efficiently transmit the resistance force, and a large resistance force can be transmitted with a small number of PC steel bars.

  Furthermore, the upper surface of the upper mounting plate of the first damping wall and / or the surface of the lower surface of the lower mounting plate of the first damping wall can be roughened by welding beat processing, blasting, or rusting. Thereby, the coefficient of friction between the upper and lower mounting plates and the concrete beam can be increased to efficiently transmit the resistance force, and a large resistance force can be transmitted with a small number of PC steel bars.

  Moreover, this invention is a structure, Comprising: It has the attachment structure of the damping wall with respect to one of the said concrete beams, It is characterized by the above-mentioned. As a result, it has sufficient durability, has a large amount of energy absorption, can exhibit a sufficient damping effect, has few restrictions on the size and capacity of the damping wall to be installed, and causes rust and appearance problems. Therefore, it is possible to provide a structure that can effectively use the space.

  As described above, according to the present invention, sufficient durability, a large amount of energy absorption can be obtained, and a sufficient vibration control effect can be obtained. Therefore, it is possible to provide a structure for mounting a vibration control wall on a concrete beam that can effectively use space and a structure including the structure.

It is a figure which shows one Embodiment of the attachment structure of the damping wall with respect to the concrete beam which concerns on this invention, Comprising: (a) is a front view, (b) is a side view. It is a figure which shows the attachment structure of the damping wall with respect to the concrete beam of FIG. 1, Comprising: (a) is AA sectional view taken on the line of FIG. 1 (a), (b) is B- of FIG. B line sectional drawing and (c) are CC line sectional views of Drawing 1 (a).

  Next, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows an embodiment of a structure for mounting a damping wall to a concrete beam according to the present invention. This mounting structure 1 is for attaching the damping wall 2 to an upper floor concrete beam 41 and a lower floor concrete beam 50. belongs to.

  As shown in FIG. 2, the damping wall 2 has three rectangular outer walls 15, 16, 17 and two rectangular inner walls 18, 19 alternately extending in the vertical direction. They are juxtaposed and integrated with bolts 24 and nuts 25 as shown in FIG. Spacers 26 and 27 are attached to the threaded portion of the bolt 24.

  Further, on the outer surfaces of the outer walls 15 and 17, stiffeners 28 and 29 are extended in the horizontal direction with a predetermined interval in the vertical direction in order to reinforce the damping wall 2. As shown in FIG. 2 (b), spacers 30 and 31 are interposed inside the damping wall 2 where the stiffeners 28 and 29 are present in order to secure a passage of viscous material in the inner walls 18 and 19. Be dressed.

  Between the adjacent outer walls 15, 16, 17 and the inner walls 18, 19 of the damping wall 2, viscous bodies 33 to 38 indicated by diagonal lines in FIGS. The viscous bodies 33 to 38 are injected from the injection port 23 of FIG. 2C, exist between the adjacent outer walls 15, 16, 17 and the inner walls 18, 19, and reach the viscous body liquid surface 22. It is stored in the body storage unit 21.

  As shown in FIG. 1, the upper mounting plate 9 of the damping wall 2 is made up of the upper floor concrete beam 41 and the upper floor side damping wall 62 by the upper PC steel bar 3 penetrating the upper floor concrete beam 41 in the beam height direction. The lower mounting plate 39 is tightened. The grout material 6 is interposed between the upper surface of the upper mounting plate 9 of the damping wall 2 and the lower surface of the upper floor concrete beam 41, and the lower surface of the lower mounting plate 39 of the upper floor side damping wall 62 and the upper floor concrete beam 41. The grout material 5 is interposed between the upper surface of each of them.

  On the other hand, the lower mounting plate 10 of the damping wall 2 is made of the lower concrete beam 50 and the upper mounting plate 40 of the lower floor damping wall 72 by the lower PC steel bar 4 penetrating the lower floor concrete beam 50 in the beam height direction. Tightly tied with. The grout material 7 is interposed between the lower surface of the lower mounting plate 10 of the vibration control wall 2 and the upper surface of the lower floor concrete beam 50, and the upper surface of the mounting plate 40 of the lower floor side vibration control wall 72 and the lower floor concrete beam 50. A grout material 8 is interposed between the lower surface and the lower surface.

The grout materials 5 to 8 are high-strength grout materials having a compressive strength of about 80 to 100 N / mm ² (non-shrinkable grout materials manufactured by Mitsubishi Materials Corporation) in consideration of the strength at the time of tension by the PC steel bars 3 and 4. MG-15 Super, Hyper (trade name), etc.) are preferably used.

  Here, between the upper mounting plate 9 and the grout material 6 of the damping wall 2 and between the lower mounting plate 10 and the grout material 7, since the force is transmitted by the frictional force between the two, The force needs to be transmitted without slipping. Therefore, the upper surface of the upper mounting plate 9 and the lower surface of the lower mounting plate 10 are subjected to welding beat processing, blast processing, rusting, or the like to adjust the surface roughness to 45 μm to 72 μm (Rz). Thus, the friction coefficient between the upper mounting plate 9 and the grout material 6 and between the lower mounting plate 10 and the grout material 7 is about 0.7 (experimental values when blasting is performed are 0.69, 0 .77, 0.76) and a design value (coefficient of friction between the black skin surface of the steel sheet and the mortar surface of the grout material) of 0.4, It is presumed that force can be efficiently transmitted without the grouting materials 6 and 7 slipping each other.

  Next, the construction method of the mounting structure 1 having the above configuration will be described.

  The present invention is suitably used for attaching a damping wall to a concrete beam such as a newly built RC building, and the concrete beams 41 and 50 shown in FIG. A hole is formed in the direction, and a through-hole through which the PC steel rods 3 and 4 are inserted is formed.

  The damping wall 2 is installed between the concrete beams 41 and 50, and a spacer (not shown) is provided between the upper mounting plate 9 and the lower mounting plate 10 of the damping wall 2 and the surface of the concrete beams 41 and 50. ) To secure the gap, form the mold, inject the grout material, and harden the grout materials 5 to 8, and then attach the mounting plates 9, 10 of the damping wall 2 and the concrete beams 41 with the PC steel bars 3 and 4. 50.

  As described above, according to the mounting structure 1, the upper mounting plate 9 and the lower mounting plate of the damping wall 2 are formed by the upper and lower PC steel bars 3 and 4 penetrating the concrete beams 41 and 50 in the beam height direction. Since each of 10 is tightly coupled to each of the concrete beams 41 and 50, it has sufficient durability and a large amount of energy absorption, and a sufficient vibration control effect can be obtained.

  Moreover, since the upper mounting plate 9 and the lower mounting plate 10 of the damping wall 2 are directly connected to each of the concrete beams 41 and 50 without providing a conventional frame steel frame or reinforcing material, the damping control to be installed is provided. There are few restrictions on the size and ability of the wall 2, and the space can be used effectively.

  Furthermore, since the PC steel bars 3 and 4 penetrate the concrete beams 41 and 50, rust and appearance problems do not occur.

  Further, the number of PC steel bars can be reduced by using the PC steel bars 3 to be tightly coupled to the lower mounting plate 39 of the upper floor side damping wall 62 disposed on the upper floor side of the upper floor concrete beam 41. In addition, the size and capacity of the damping walls 2 and 62 to be installed are reduced, so that rust and appearance problems do not occur, and the space can be used more effectively.

  Furthermore, the number of PC steel bars can be reduced by tightly connecting with the lower mounting plate 40 of the lower floor side damping wall 72 disposed on the lower floor side of the lower floor concrete beam 50 by the PC steel bars 4. In addition, the size and capacity of the vibration control walls 2 and 72 to be installed are reduced, so that rust and appearance problems do not occur, and the space can be used more effectively.

1 Damping wall mounting structure for concrete beam 2 Damping wall 3, 4 PC steel bar 5-8 Grout material 9 Upper mounting plate 10 Lower mounting plate 11-14 Nut 15-17 Outer wall 18, 19 Inner wall 21 Viscous body storage 22 Viscous liquid level 23 Inlet 24 Bolt 25 Nut 26, 27 Spacer 28, 29 Stiffener 30, 31 Spacer 33-38 Viscous body 39 Lower mounting plate 40 Upper mounting plate 41 Upper floor concrete beam 50 Lower floor concrete beam 62 Upper Floor control wall 72 Lower floor control wall

Claims (6)

A structure that attaches damping walls to concrete beams on the upper and lower floors,
The upper mounting plate of the damping wall is a second steel damping wall disposed on the upper floor concrete beam and the upper floor side by a PC steel bar penetrating in the beam height direction of the upper floor concrete beam. Tightened with the lower mounting plate of
A seismic control wall for a concrete beam, wherein a lower mounting plate of the seismic control wall is fastened to a concrete beam on the lower floor by a PC steel bar penetrating in the beam height direction of the concrete beam on the lower floor side Mounting structure. A structure that attaches damping walls to concrete beams on the upper and lower floors,
A second seismic control wall disposed on the lower concrete floor and the lower floor by means of a PC steel rod in which the lower mounting plate of the vibration control wall penetrates in the beam height direction of the lower concrete floor. Tightened with the upper mounting plate of
The damping wall for a concrete beam, wherein the upper mounting plate of the damping wall is tightly coupled to the concrete beam on the upper floor by a PC steel bar penetrating in the beam height direction of the concrete beam on the upper floor side. Mounting structure.   Between the upper surface of the upper mounting plate of the first damping wall and the lower surface of the upper concrete beam and / or the lower surface of the lower mounting plate of the first damping wall and the upper surface of the lower concrete beam. The structure for mounting a damping wall to a concrete beam according to claim 1 or 2, wherein a grout material is interposed therebetween.   The surface roughness of the upper surface of the upper mounting plate of the first damping wall and / or the lower surface of the lower mounting plate of the first damping wall is 45 μm (Rz) or more and 72 μm (Rz) or less. The mounting structure of the damping wall with respect to the concrete beam of Claim 1, 2, or 3.   The upper surface of the upper mounting plate of the first damping wall and / or the surface of the lower surface of the lower mounting plate of the first damping wall is roughened by welding beat processing, blasting, or rusting. The mounting structure of the damping wall with respect to the concrete beam in any one of Claim 1 thru | or 4.   A structure comprising the structure for attaching a vibration control wall to a concrete beam according to any one of claims 1 to 5.

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