JP2012255257A - Aseismatic structure of non-structural wall and method for repairing the non-structural wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aseismatic structure of a non-structural wall and a method for repairing the non-structural wall, which can improve earthquake resistance of the non-structural wall not being a structural member.SOLUTION: In an aseismatic structure 1 of a non-structural wall, a defective part 20 is formed at a corner part which faces an opening 15 of a partial wall 11 formed between the two openings 15 and 15, and a repair material is infilled into the defective part 20. In a method for repairing the non-structural wall, a groove is formed by drilling a hole at the corner part of the partial wall 11 more than once while displacing a position or cutting the corner part, and the defective part 20 is formed by cutting and expanding the groove.

Description

  The present invention relates to a seismic structure for a miscellaneous wall and a method for repairing a miscellaneous wall.

  In recent years, many buildings have sufficient seismic performance by design based on seismic standards, and even when a large seismic force is applied, there is no significant damage to the structure part (main frame) .

  However, so-called miscellaneous walls (non-structural walls) do not have a significant impact on the building itself even if damage occurs, so they do not have sufficient earthquake resistance against large seismic forces. It is common. For this reason, many miscellaneous walls do not have followability with respect to the deformation of the main frame when an earthquake force is applied, and there has been a risk of compressive failure at shearing corners or corners during a large earthquake.

  On the other hand, conventional building renovation methods are only intended to improve the earthquake resistance of buildings, and there was no idea of improving the earthquake resistance of miscellaneous walls.

  For example, the method for renovating a building described in Patent Document 1 provides vertical slits along the entire length of the existing wall, and horizontal slits along the beam at the four corners of the wall. It is intended to ensure the toughness of the beam, and to improve the seismic performance of the building, not to improve the seismic performance of the miscellaneous wall.

Japanese Patent Laid-Open No. 9-112065

  The miscellaneous wall does not cause structural problems even if it is damaged. However, if the miscellaneous wall is damaged, there is a risk that a secondary disaster will occur due to the fall of a broken piece of concrete or the removal of decorative items such as tiles. is there.

  The present invention solves the above-described problems, and proposes to provide a seismic structure for a miscellaneous wall and a method for repairing the miscellaneous wall, which can improve the seismic resistance of the miscellaneous wall that is not a structural member. And

In order to solve the above-mentioned problem, the quakeproof structure for a miscellaneous wall according to the present invention is characterized in that a defect portion is formed at a corner of the miscellaneous wall.
The miscellaneous wall may be a vertical wall formed between two openings, and the defect may be formed at a portion facing the opening.
Further, the defect portion may be filled with a repair material.

  According to the seismic structure of the miscellaneous wall, since a space (defect portion) is formed at a corner portion that becomes a compression edge of the miscellaneous wall, stress is prevented from concentrating on this portion. Therefore, the deformation performance of the miscellaneous wall is improved, and the miscellaneous wall can be prevented from being damaged.

  The method of repairing a miscellaneous wall according to the present invention is to drill a plurality of times while shifting the position of the corner of the existing miscellaneous wall, or by cutting the corner of the existing miscellaneous wall to form a groove, and then widening the groove. It is characterized by forming a defect portion.

  According to the method for repairing a miscellaneous wall, it is possible to easily improve the deformation performance of the miscellaneous wall.

  According to the seismic structure for a miscellaneous wall and the method for repairing a miscellaneous wall according to the present invention, it is possible to improve the seismic resistance of a miscellaneous wall that is not a structural member.

It is a front view which shows the earthquake resistant structure of the miscellaneous wall which concerns on embodiment of this invention. (A) is an enlarged view which shows a part of seismic structure of the miscellaneous wall of FIG. 1, (b) is explanatory drawing of the setting method of a defect | deletion part specification. (A)-(c) is a perspective view which shows each construction step of the repair method of a miscellaneous wall. (A) And (b) is a perspective view which shows each construction step of the repair method of the miscellaneous wall which concerns on another form. It is a schematic diagram which shows the deformation | transformation condition of a standing wall. It is a graph of the relationship between the proof stress of a building and a main frame, and a deformation | transformation, Comprising: (a) is after repair of a miscellaneous wall, (b) has shown before repair of a miscellaneous wall. It is a front view which shows the other form of the earthquake resistant structure of the miscellaneous wall which concerns on this invention.

As shown in FIG. 1, the quakeproof structure 1 of the miscellaneous wall according to the embodiment of the present invention is formed by forming a deficient portion 20 at a corner of the vertical wall 11.
This embodiment demonstrates the case where repair is performed with respect to the standing wall 11 which is the existing miscellaneous wall 10. FIG.

  The vertical wall 11 is formed in a space surrounded by a column beam frame (main frame) 30 including left and right columns 31 and 31 and upper and lower beams 32 and 32.

The standing wall 11 of the present embodiment shields the space surrounded by the column beam frame 30 together with the lower waist wall 12, the upper hanging wall 13, and the left and right sleeve walls 14 and 14.
The standing wall 11 is formed between the two openings 15 and 15. That is, an opening 15 is formed between the vertical wall 11 and the sleeve wall 14.

  In addition, the structure of the existing miscellaneous wall 10 is not limited. For example, in this embodiment, the case where the vertical wall 11 is formed between the waist wall 12 and the hanging wall 13 will be described. However, the vertical wall 11 faces the upper and lower beams 22 and 22 directly. Also good.

  The defect portion 20 is formed at a portion facing the opening portion 15. In this embodiment, the defect | deletion part 20 is formed in the four corner | angular parts of the standing wall 11, respectively.

  As shown in FIG. 2A, the defect portion 20 of the present embodiment is formed in a rectangular shape in cross section.

  The shape and size of the defect portion 20 are not limited and may be set as appropriate. In the present embodiment, even if the vertical wall 11 is deformed (rotated) with the deformation of the main frame 30, the building Is set so as to ensure θ = 1/200, which is the target value of interlayer deformation of the exterior material (see FIG. 2B).

Specifically, with respect to width _{L 0} of the square rising wall 11, the height _{h 1} of the defect 20 _L 0/400 or more, and to form more than 1 cm. Further, in the present embodiment, the width _{L 1} of the defect 20 _is about _{L 0/8 (L 0 /} 10~L 0/6 in the range of).

  The defect portion 20 is filled with a repair material 21. Although the material which comprises the repair material 21 will not be limited if it is a material whose Young's modulus is lower than concrete, such as damping rubber, a silicon | silicone, and a foamed polystyrene, for example, it fills with urethane foam in this embodiment.

Next, the repair method of the miscellaneous wall of this embodiment is demonstrated.
The vertical wall 11 is repaired by drilling the corners of the vertical wall 11 in the wall thickness direction with a drill or the like along the planned shape of the defect 20 (see FIG. 3A). .

As shown in FIG. 3B, the defect portion 20 is formed by drilling a plurality of times while shifting the drilling position. The plurality of holes 22, 22,... Formed by a plurality of drilling holes are overlapped and are continuous in the lateral direction.
The hole 22 may be formed leaving a bottom having a thickness of about several millimeters without penetrating the vertical wall 11 from the outer surface (outside of the building). By doing so, it is possible to prevent the dust accompanying the drilling from entering the building.

After drilling the plurality of holes 22, if necessary, the upper and lower remaining portions of the boundary portion between the holes 22 are scraped to flatten the upper surface, the lower surface, and the side surfaces of the defect portion 20 (see FIG. 3C). .
When the defect portion 20 is formed, the defect material 20 is filled with the repair material 21.

In addition, the formation method of the defect | deletion part 20 is not limited.
For example, as shown in FIG. 4 (a), first, a corner 23 of the vertical wall 11 is cut to form a groove 23, and then the groove is cut and widened using chisel or the like. The defect portion 20 (see FIG. 4B) may be formed. Further, the defect portion 20 may be directly cut without forming the groove 23.
Further, the drilling of the hole 22 by the drill is not limited to the case of drilling in the wall thickness direction, and a plurality of holes may be drilled from the opening 15 side.

  When the existing reinforcing bar of the vertical wall 11 is exposed with the formation of the defect part 20, a rust preventive material is applied to the reinforcing bar edge.

  According to the seismic structure of the miscellaneous wall and the method for repairing the miscellaneous wall according to the present embodiment, the seismic performance of the miscellaneous wall can be improved simply and inexpensively by simply forming a defect in the corner of the miscellaneous wall 10.

  Since the vertical wall 11 has the missing portion 20 formed at the corner, the deformation performance of the vertical wall 11 is improved, and even when the main frame 30 is deformed by seismic force or the like, the vertical wall 11 Can also follow (see FIG. 5).

That is, since the defect portion 20 is formed at the corner portion that becomes the compression edge of the vertical wall 11, even when the main frame 30 is deformed, stress is concentrated on the corner portion of the vertical wall 11. There is nothing, and as a result, the corners of the vertical wall 11 are prevented from being crushed.
In addition, since the deformation performance of the standing wall 11 is enhanced, it is possible to prevent the fall of concrete pieces and the decorative items such as tiles.

When designing the building B, the proof strength of the vertical wall 11 is not usually taken into consideration, and therefore the proof strength of the building B is lower than the proof strength of the main frame 30 even if the missing portion 20 is formed on the vertical wall 11. (Refer to FIG. 6A), and therefore no actual harm occurs.
That is, as a result of the renovation of the vertical wall 11, the relationship between the proof stress and deformation of the main frame and the building B substantially coincides with each other as shown in FIG. Building B will show.

  In addition, in FIG.6 (b), the relationship between the yield strength and deformation | transformation of the building B before repairing the standing wall 11 is shown as reference. In terms of design, only the proof strength and rigidity of the main frame 30 are considered, and the proof strength and rigidity of the vertical wall 11 are not expected. However, as shown in FIG. 6B, the vertical wall 11 also contributes to yield strength and rigidity at the initial stage of deformation. Further, the vertical wall 11 before the repair may be destroyed at an early stage to cause a secondary disaster.

Since the defect portion 20 is shielded by the repair material 21, dust, water, and the like are prevented from entering from the defect portion 20.
Further, since a material having a Young's modulus lower than that of concrete is adopted as the repair material 21, even when the vertical wall 11 is deformed, the repair material 21 absorbs the stress, and the vertical wall 11 is prevented from being damaged.

The height _{h 1} of the defect 20, as _L 0/400 or more to the width _{L 0} of the square rising wall 11, it is possible to ensure the theta = 1/200 is a target value of the inter-deformation of the outer package. Therefore, it is possible to prevent only the vertical wall 11 from being damaged. Further, by setting the height h ₁ of the defect portion 20 to 1 cm, the defect portion can be formed by a drill or the like.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiment, and the above-described constituent elements can be appropriately changed without departing from the spirit of the present invention.

  For example, although the case where the existing miscellaneous wall 10 was repaired was demonstrated in the said embodiment, you may apply the earthquake-resistant structure of the miscellaneous wall of this invention to a new miscellaneous wall. In this case, the defective part 20 may be formed by boxing.

  In the embodiment, the defect portion 20 is filled with the repair material 21, but the repair material 21 is not necessarily filled. For example, the defect portion 20 may be left open or may be shielded by a plate material or the like.

  In the embodiment, the case where the defect portion 20 is formed in a rectangular cross section has been described, but the cross sectional shape of the defect portion 20 is not limited.

  In the above embodiment, the case where the missing portion 20 is formed at the corner of the vertical wall 11 has been described. However, the miscellaneous wall 10 on which the defective portion 20 is formed is not limited to the vertical wall 11, for example, a sleeve It may be formed on the wall 14.

  In the above-described embodiment, the case where the vertical wall 11 is focused has been described. However, when the vertical wall 11, the waist wall 12, and the hanging wall 13 are viewed as an integrated miscellaneous wall 10, the vertical wall 11 and the waist wall 12. In the corner portion (corner portion of the miscellaneous wall 10) formed by the above, a defect portion may be formed on the waist wall 12 side, or the corner portion of the vertical wall 11 and the hanging wall 13 (corner of the miscellaneous wall 10). Part)), the defect part 20 may be formed on the drooping wall 13 side (see FIG. 7).

DESCRIPTION OF SYMBOLS 1 Seismic structure of miscellaneous wall 10 Miscellaneous wall 11 Standing wall 15 Opening part 20 Defect part 21 Repair material 30 Pillar beam frame (main frame)

Claims (5)

  A seismic structure for a miscellaneous wall, characterized in that a defect portion is formed at a corner of the miscellaneous wall. The miscellaneous wall is a vertical wall formed between two openings,
The seismic structure for a miscellaneous wall according to claim 1, wherein the defect portion is formed in a portion facing the opening.   The earthquake resistant structure for a miscellaneous wall according to claim 1 or 2, wherein the defect portion is filled with a repair material.   A method of repairing a miscellaneous wall, comprising forming a defective portion by drilling a corner portion of an existing miscellaneous wall a plurality of times while shifting a position. A method for repairing a miscellaneous wall, comprising: forming a groove by cutting a corner portion of an existing miscellaneous wall and then cutting and widening the groove.

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