JPS63167853A - Structure of insulating section of slit earthquakeproof wall and execution method thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Application in Industry] The present invention relates to the structure of a shear wall of a reinforced concrete building, and more specifically, the shear wall is fixed to a beam only at the upper side, and at both side edges and the lower side, The present invention relates to the structure of an insulating part that has an insulating structure by providing a slit between a pillar and a casing, and a method of constructing the same.

[Conventional technology]

When placing seismic walls at key points in a building and attaching them to the structural framework of columns and beams, the structure functions as a rigid structure and a structure with variable rigidity depending on the magnitude of the earthquake. Structural designs such as
It is known that one of the upper and lower sides is rigidly fixed to a beam, both sides are not fixed to a column, and gaps are provided on three sides. 22738
Its structural philosophy is disclosed in publications such as No. At this time, the gaps on the three sides are filled with foamed or porous concrete, rock wool, asbestos, etc. so as not to have any structural connection, so as to form a substantial part of the wall. There is.

On the other hand, when there are large openings on both sides of a column and the wall consists of only a waist wall, or a waist wall and a hanging wall, when the column forms a short column in the direction of this wall, the pillar and A shearing measure was taken by creating a slit between the walls, and since this wall was supported on only one side by a beam,
Various types of connection structures between pillars and walls have been proposed that provide both structural slits and support fixing parts. This structure is therefore also approximately referred to in the present invention.

[Problem that the invention seeks to solve]

A shear wall that insulates the structure from the structural body on three sides is theoretically possible, but for example, a wall with a fixed upper side is in a suspended state, so it cannot be used as a "rigid wall" in normal times or during small earthquakes. ”, the fixation to the frame is insufficient, and if a gap is left as a “slit”, it will not work like a normal outer wall,
Since it lacks a substantial part as an interior wall or partition wall, it also poses an obstacle to finishing work. Of course, in terms of ventilation, sound insulation, etc., the concept of ``heavy'' should be avoided, and the building does not form a ``wall.''

The filling for that purpose ended up being in a contradictory relationship with the structural slit,
As an example of a structure that can also be used as an open channel, the
Although there is a support fixing method of No. 22738, filling the entire length of the wall in the horizontal direction requires a separate process.

[Means for solving problems]

The present invention is an invention of a structure in which the insulating part of a seismic wall having three-sided slits is filled and integrated as a wall body, and although it does not solve the above-mentioned problems, , was developed for the purpose of earnest improvement. This invention involves interposing insulators to prevent structural rigidity between columns and walls and between beams and walls within a concrete formwork that forms a frame, and pouring concrete into the slits. The gist of the invention is to form an integral seismic wall without forming any gaps, thereby configuring equivalent insulating parts at the positions where insulating slits are formed. This insulating part has a foam board at the center of the wall thickness, and joints are formed on both sides of the wall.The insulating part is formed when concrete is poured, especially on the top surface of the beam. At the bottom of the wall, this insulating part is formed by an insulating board with a height difference like a "h" shape and joint material on the inside and outside surfaces, and this insulating board is made of a foam board as a core material. , a second invention is characterized in that protective plates are bonded to both sides and the convex ridgeline in the center is used as a regulating body to restrain out-of-plane behavior of the earthquake-resistant wall, and the method for constructing the insulation part as described above is a second invention. .

〔Example〕

The structure of the insulating slit portion of the present invention will be explained based on the drawings. Figure 1 is an elevation view showing the general structure of a building with earthquake-resistant walls, where ■ indicates columns, 2 indicates beams on the lower floor,
3 is the beam on the upper floor, and 4 is the earthquake-resistant wall. This shear wall 4 is rigidly reinforced with reinforcing bars 5, and the upper floor beam 3 is connected to the connecting bar 6.
are rigidly connected by. The side edges 7, 7 and the lower edge 8 are structurally insulated by insulating slits 9, and insulating parts 10, 20 are formed at these positions.

Next, FIG. 2 is a cross-sectional view taken along the line A-A in FIG. and
The insulating portion IO is interposed between the concrete 30 of the column I and the concrete 40 of the shear wall 4.

FIG. 3 is a cross-sectional view taken along the line B-B in FIG. It consists of a foam board core material 22 and a protective plate 23 covering the core material 22. The insulating plate 21 is bent into an approximately "H" shape, as an example of having a height difference, and is installed horizontally on the upper surface of the beam 2 with the central convex ridge line 24 facing upward. Protective plate 23
are obtained by processing and molding a stainless steel plate or a steel plate, and are bonded to each surface of the core material 22. Reference numeral 25 is a seat formed on the upper surface of the beam 2, which makes the lower surface of the insulating plate 21 fit.

26 is a boss member for regulating the relative movement between the beam 2 and the seismic wall 4 in the in-plane and out-of-plane directions of the seismic wall 4;
, dowel receiving material 28. The dowel material 27 is the insulating plate 2
The dowel receiving material 28 is fixed downwardly to the lower edge of the seismic wall 4 with the dowel material 27 loosely fitted in the longitudinal direction of the wall.

Although the structure shown in FIG. 2 uses a synthetic resin foam board as the insulating board 11, a foam board made of other materials may be used as the solid inclusion of the elastic body. For example, by flattening the pipe material, It can also be replaced by a plate made into a hollow flat rectangular tube, and horizontal insulating plates are especially made of stainless steel.

Next, for the horizontal insulating plate 21, which is the main element of the present invention, a bent plate 21A with a stepped cross section can be used due to the requirement of "having a difference in height", an example of which is shown in FIG. There is. 2 in the diagram
5A is a seat on which the insulating plate 21A is installed corresponding to the above-mentioned installation seat 25, and a step-shaped protrusion is formed on the upper surface of the beam 2. In this case, since the seismic wall 4 is prevented from moving only inward with respect to the beam 2, the dowel material 27 is attached to the insulating plate 21A, and the dowel receiving material 28 buried in the lower edge 8 of the wall body is attached to the insulating plate 21A. It is essential that they be engaged to form the boss member 26.

Furthermore, 13 in the figure is a joint material molded from hard PVC and has a U-shaped cross section, and corresponds to the joint material 12 described above.

[For production]

The function of the insulating part of the present invention will be explained in detail based on the construction method of the second invention. Fig. 5 and Fig. 6 are drawings corresponding to Fig. 2 and Fig. 3, in which 50 is a concrete formwork,
51 is a supporting material, and 52 is a separator used as a formwork binding material. After the formwork 50 is erected and assembled using supporting battens 51, it is tightened using separators 52. Shear wall 4
A support rod 53 is provided horizontally and perpendicularly at the center of the separator 52 provided near the end of the separator 52, facing the direction of the column 1, and the base end is fixed to the separator 52 by welding.
Install multiple stages vertically at m intervals. The length to this free end is such that it protrudes into the interior of the column 1 beyond the outer surface thereof, and the synthetic resin foam board 11 is vertically supported along the column surface using washers and nuts 54. On the other hand, joint forming materials 55 are installed on the inner surface of the formwork 50 so as to be located on both sides of the insulation plates 11 of the foam board. It is divided into wall 4. If concrete 30.40 is poured for the relevant floor of the pictured part here,
An insulating slit 9 with the structure and a side edge 7 of the shear wall 4 are formed. After the concrete hardens, the formwork 50 is demolded, the joint forming material 55 is removed, and this groove is filled with caulking material 12, whereby an insulating section is formed by the insulating plate 11 and the joint material 12. Since the synthetic resin foam board 11 is made of closed foam and is relatively hard, and the concrete 30, 40 is cast toward it, the insulating slit 9 contains a solid object instead of a void, To form a "wall body" that can be sufficiently finished. This construction method requires that the insulating plate 11 is buried in the concrete and not placed between the column 1 and the side edge 7, that it is accurately positioned at a predetermined position when assembling the formwork, and that the joints are It is characterized by the fact that it is formed and then caulked afterwards, and in particular the insulation part on the outer wall is designed to prevent water ingress and leakage.

Next, a construction method for the lower 8 portions of the shear wall 4 will be explained with reference to FIG. When placing the preliminary concrete 60 of the beam 2 on the lower floor, a seat 25 is formed on the upper surface of the concrete at the position of the shear wall 4 using concrete or mortar.

This protrusion having a triangular cross section is formed with a slope of 15 to 30' so that the lower surface of the insulating plate 21 fits therein. Next, this installation is carried out by installing the insulating plate 21 with an "H"-shaped cross section face down on the seat 25, and attaching the joint forming material 55 attached to the external formwork 50 extending from the lower floor and the supporting material 51 fixed to the upper surface of the beam 2. Position it by intervening and sandwiching it. Since this position does not require strict height accuracy, the installation may be done by further placing a pad on the upper surface of the seat 25. After that, the formwork 50 of the shear wall 4 of this floor is erected upward, and the concrete 40 is poured at the same time as the concrete 30 of the column 1 after being assembled. After the concrete has hardened, demolding is performed in the same way as for the pillar 1 portion, and the joint forming material 55 is removed and caulking is performed. Since this joint is in the horizontal direction, the cross section of the joint forming material 55 on the outer surface of the outer wall is designed not only to facilitate demolding but also to serve as a drainage surface. The characteristics of the formation of the horizontal insulation part 20 are also similar to the formation of the insulation part 10 described above, in that the concrete 60 on the lower floor precedes the concrete 40 on this floor,
The difference is that the insulating plate 21 is a bent plate with a high central portion and sloped side edges.

The horizontal insulating part 20 corresponds to the rigid connection between the beam 3 on the upper floor and the shear wall 4, and has a particularly important meaning because the vertical insulating part 10 is in the form of a flat plate, and is formed in that way. . That is, the horizontal "F"-shaped insulating section 20 has a structure that allows relative displacement between the beam 2 and the seismic wall 4 in the in-plane direction, and restrains it in the out-of-plane direction. This effectively acts against the interstory displacement of the building frame, and also maintains the function of the shear wall on the beam structure. The boss member 26 described above further clarifies the function of the insulating portion 20, and suppresses out-of-plane displacement of the seismic wall 4 while allowing in-plane relative displacement.

When using such a boss member 26, the insulating plate 21
The insulating plate 21A can be configured to have a step-shaped cross section as shown in FIG. 4, and the illustrated insulating plate 21A is particularly suitable for use on an outer wall. Further, the joint material 13 may also be used as a joint forming material 55 during concrete pouring, or may be inserted into a joint to form a decorative joint.

〔Effect of the invention〕

1. The present invention is the structure of the insulating part of the slit shear wall constructed as described above, and the construction method thereof has been completed as the second invention, so the upper side is rigidly connected to the upper floor bundle and other No. 3
This is because a seismic wall with an insulating slit between the column and the upper floor bundle at the side has an insulating part at the lower edge, and allows in-plane displacement while restraining out-of-plane displacement. As the wall of the frame, it is a truly stable earthquake-resistant wall.

In addition, since the insulating part within the insulating slit is formed as a built-in structural part according to the second invention and is constructed at the same time as concrete is poured, it has been possible to successfully reduce the post-filling process to only the joint part. Moreover, the formation of the vertical and horizontal insulating parts is accurate, and the horizontal insulating part in particular achieves the height difference with a simple structure and effectively cools the insulating slit, making it a truly remarkable invention. , makes a major contribution to the construction industry.

[Brief explanation of the drawing]

The drawings show preferred embodiments of the present invention and are intended to explain the structure and construction method of the insulating section of the slit shear wall. Figure 1 is an elevation view of the general part of the building, showing the relationship between the body frame and the shear wall, as well as the main configuration of the present invention.
It is a detailed sectional view along the AA line and the BB line of a figure. Fourth
This figure is a vertical sectional view of another modified example of the main part of FIG. 3, and FIGS. 5 and 6 are explanatory diagrams of the construction method of the structure of FIGS. 2 and 3, respectively. 1... Pillar, 2... Upper floor bundle, 3... Upper floor bundle, 4...
- Earthquake-resistant wall, 6... Connection bar, 7... Side edge, 8... Lower edge, 9 Insulating slit, 10.20... Insulating part, 21.
21A... Insulating board, 11.22... Synthetic resin foam board, 12... Joint material, 23... Protective plate, 25.25A
...Installation is seat, 26...Boss member, 30, 40.6
0... Concrete, 50... Shape material, 52... Binding member, 53... Supporting material, 55... Joint forming material. -CVJ size ψt ■○〇-N

Claims (4)

[Claims] (1) In the structure of the insulating part of the shear wall, where insulating slits are provided between both side edges of the shear wall and the columns and between the lower edge and the lower floor beam, the slits on the column side are An insulating board made of foam board is placed in the center of the beam in the thickness direction, and an insulating part with backfilling joint material is interposed on the wall side. A protective plate is glued to the cross section, and the insulating plate with a height difference is placed horizontally, and an insulating material with joint material is interposed on the inner and outer surfaces. Concrete for the columns and seismic wall is poured against these insulated parts. A structure of an insulating part of a slit shear wall, characterized in that the insulating slit is filled with (2) In the construction method for the insulation part of a shear wall in which insulation slits are provided between both edges of the shear wall and the columns and between the lower edge and the lower floor beam, the joints between the shear wall and the columns and the shear wall The process of installing concrete formwork between the shear wall formwork, the process of installing insulating plates and joint forming materials vertically along the pillars and horizontally on the upper surface of the lower floor beam, and then placing concrete in the formwork. 1. A method for constructing an insulating part of a slit shear wall, the method comprising the steps of: pouring a joint material into the joint; and, after demolding the formwork and joint forming material, filling the joint with the joint material. (3) The insulation part of the slit shear wall according to claim 2, characterized in that the vertical insulation plate is positioned and supported on the outer surface of the column by horizontal support rods from the formwork binding material of the shear wall. construction method. (4) The horizontal insulating plate has a height difference in its cross section, and the insulating plate is installed so as to conform to the installation seat formed on the upper surface of the lower floor beam. Construction method of insulation part of shear wall.