JPH03166448A - Structure of stack wall face of construction or the like, and reinforcing method for the stack wall face - Google Patents

Abstract

PURPOSE:To remarkably increase the tensile strength of a stack wall face with simple work execution so as to sharply improve earthquake resistance by forming a reinforcing layer, which includes fibers for reinforcement, at least on one side of the wall faces of a stack where objects for stacking are stacked. CONSTITUTION:An epoxy resin adhesive 3 is applied on the surface 1a, at least on one side, of the wall faces 1 of a stack where objects for stacking such as bricks 2, or the likes are stacked. Next, a sheet material 4, which are made in specified dimensions and consist of glass fibers, is bonded. Next, another sheet material 4 is bonded to the whole surfaces 1a of the wall faces 1 of the stack in the same procedure. Furthermore, a proper cover is applied to the outside of the sheet material 4 as occasion demands.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to structures of masonry walls such as buildings and methods of reinforcing masonry walls, and more specifically, to reinforcement methods for masonry wall structures such as buildings, and more particularly, to reinforcement methods for masonry wall structures such as structures, and more particularly, This article relates to structures with laminated walls and reinforcement methods for masonry walls.

(Prior Art) In general, masonry buildings such as this type of masonry construction have a drawback in that they are extremely lacking in earthquake resistance because the strength against tensile stress of bricks, joint mortar, etc. is extremely low. Therefore,
In recent years, many methods have been proposed to improve earthquake resistance. For example, by forming bricks into hollow shapes and inserting reinforcing bars inside the hollow bricks, the brick walls can be made into so-called RC. There are things that try to improve sexuality.

(Problem to be solved by the invention) However, although the above-mentioned reinforcement method can be applied when constructing a new wall, it cannot be applied to reinforcing and repairing an existing brick wall. The major problem was that the scope was extremely narrow.

On the other hand, when restoring a brick cultural property building, for example, it is possible to make the inside of the structure made of reinforced concrete and strengthen it by preserving the so-called outer walls; There were various disadvantages such as the heavy weight, the long construction time required, and in some cases, the necessity of major structural changes to the structure itself.

Furthermore, although these methods can improve seismic resistance to a certain extent, they also have certain limits, and therefore are not necessarily the best means for sufficiently improving the seismic resistance of masonry walls. It wasn't something.

Therefore, the present invention has been made to solve the above-mentioned conventional problems, and its purpose is to provide a masonry wall structure with extremely excellent earthquake resistance, and to construct a new structure. To provide a reinforcing method for a masonry wall surface which can be widely applied not only to cases of construction but also to the preservation and repair of masonry walls of existing structures, etc., and which can be carried out extremely simply and quickly.

(Means for Solving the Problem) That is, in order to achieve the above object, the present invention provides a masonry wall surface 1
This is a masonry wall structure such as a building in which a reinforcing layer 4 containing reinforcing fibers is formed on at least one side of the wall.

Further, the present invention provides a structure for reinforcing the flu wall surface 1 by forming a reinforcing layer 4 containing reinforcing fibers on at least one side of the masonry wall surface 1 on which the masonry material 2 has been masonned. This is a reinforcement method for stacked walls.

(Function) Therefore, in the masonry wall structure characterized by the above configuration, the reinforcing layer 4 containing reinforcing fibers is provided on at least one side of the masonry wall surface 1. The strength of the masonry wall surface 1 itself is improved, and therefore, this tfl laminated wall surface 1 has excellent earthquake resistance.

In addition, when constructing this structure, the masonry object 2...
Reinforcement can be carried out by an extremely simple operation of simply forming a reinforcing layer 4 containing reinforcing fibers on at least one side of the masonry wall surface 1 which has been masonned. You can get it.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings for a case where an existing brick wall surface is reinforced and repaired.

The brick wall surface 1 of the structure shown in FIG. After applying an epoxy resin adhesive 3 as shown in FIG. 3, a sheet material 4 made of glass IS fiber formed to a predetermined size is adhered thereon. Thereafter, the sheet materials 4 are successively adhered onto the entire surface Ia of the brick wall surface 1 in the same manner. This completes the reinforcement and repair work for the brick wall surface 1 of the structure. Incidentally, from the viewpoint of fire prevention or moisture prevention, it is preferable that the outer surface of the sheet material 4 is coated.

As described above, the brick wall reinforcement and repair work according to this embodiment is extremely simple and consists of two steps: applying the adhesive 3 to the brick wall 1 and gluing the sheet material 4 onto the brick wall 1. Therefore, it has the advantage of being able to be constructed in a short time.

Moreover, since the sheet material 4 made of glass fiber is extremely lightweight and highly flexible, its construction work can be performed extremely easily, and by cutting the sheet material 4 into a predetermined shape, it can be used in various ways. It can also be flexibly applied to brick wall surfaces 1 that are masonry-constructed in various shapes.

In addition, the brick wall 1 that has been reinforced and repaired in this way has excellent earthquake resistance because the sheet material 4 made of glass fiber functions as a reinforcing material for the brick wall 1 and its strength is significantly improved. It means that they have a sexual nature.

Then, in order to confirm the above-mentioned improvement in seismic resistance, the following seismic test was conducted.

The brick wall surface 7 used in the test was constructed in the same manner as in the above example, with 21 steps in the vertical direction and 6 bricks 2 in the width direction, and the total weight was approximately 750k9. Become. The joint mortar 5 is prepared by mixing coal:sand=1=2 (volume ratio) and lime:water=1:0.7 (weight ratio). After about 140 days, this brick wall was built. At t'1, four types of reinforcement as shown in FIG. 3 were applied, and seismic tests were conducted on each of them.

That is, the one in the same figure (a) is an unreinforced brick wall (hereinafter referred to as the N-type specimen), and the figure (opening) is a brick wall with reinforced steel columns (hereinafter referred to as the S-type specimen). Reinforcement steel frame 6 is T
Constructed of shaped steel (T-+50XIoO X6 X9),
The flange is connected to the brick wall surface 1 by a 7-car port 7 with a diameter of 6 mm, and the embedding depth of the 7-car port 7 is 200 mm.
The mIL pitch is 250 mm.

Furthermore, the same figure (c) shows the S-type specimen reinforced by adhering a glass fiber sheet material 4 to one side of the steel support column, and the same figure (2) shows the above-mentioned N-type specimen. Glass fiber sheet material 4.4 is bonded and reinforced on both sides of the sheet. Further, each of the sheet materials 4 is adhered to the brick wall surface 1 by unidirectional roving and by the so-called hand-lay-up method using an epoxy resin adhesive, just as wallpaper is pasted.

Then, as shown in Fig. 4, these specimens are fixed on a vibration table 8 and tested by vibrating them in the out-of-plane direction shown by the arrow in Fig. 4 (0).The excitation waveform is It is a gradually increasing amplitude type harmonic wave with a period of 3.0 to 6.0 Hz and 1 degree.

As a result, when applying a constant input acceleration to each brick wall 1 and examining the relationship with the response acceleration at the top, it is found that as long as the input acceleration of any wall 1 is small, the response acceleration is equal to the input acceleration. Although the acceleration increases proportionally, when a certain acceleration is reached, the brick wall surface 1 begins to exhibit nonlinear vibration characteristics.

For example, the N-type specimen in Figure 3 (a) has a response acceleration of approximately 0.
．． When it reaches 2G, the joints move apart and the period increases, and even if the input acceleration is increased thereafter, the response value of 0.4G or more cannot be reached.If the input intensity is increased to further increase the response acceleration, the brick wall surface 1 Macroscopic cracks appeared and it suddenly collapsed.

Furthermore, it was found that both the S-type specimen shown in Figure (0) and the specimen reinforced with a combination of steel and glass fibers shown in Figure (l) can sufficiently withstand an acceleration of 1.0G.

However, in the case of an S-type specimen with only column reinforcement, approximately 1.0G
When the acceleration reaches It collapsed due to being hit by Pillar 6.

On the other hand, in the case of the specimen in which one side was reinforced with fibers as shown in FIG.

On the other hand, the test specimen shown in Figure (2), which was reinforced with Ta fibers on both sides, suffered almost no damage even when it was subjected to accelerations exceeding 1.2G several hundred times. We were able to verify the conclusion that reinforcement with the sheet material 4 can significantly improve the earthquake resistance of the brick wall 1.

Furthermore, even after the sheet material 4 has been bonded, it is possible to freely peel it off as needed, so that even if the design of the brick wall surface 1 is subsequently changed,
It also has the advantage of being able to respond flexibly to this.

In this way, the structure according to this embodiment has various advantages as described above, and therefore can be applied in an extremely wide range.

In the above embodiment, the sheet material 4 is bonded only to the front side of the brick wall surface 1, but it may also be bonded to both the front and back surfaces of the brick wall surface 1. As a result, the strength of the brick wall surface 1 is further increased, and the earthquake resistance is further improved.

Further, the material of the sheet material 4 to be adhered to the brick wall surface 1 is not limited to glass fiber as in the above embodiment, but may be made of a material containing reinforcing fibers having high tensile stress such as carbon fiber. Well, the specific material doesn't matter.

Further, in this embodiment, an epoxy resin adhesive 3 is used to adhere the sheet material 4 onto the brick wall surface 1, but the means for attaching the sheet material 4 to the brick wall surface 1 is also limited to adhesives. It's not a thing.

Further, in the above embodiment, the sheet material 4 is used to reinforce the brick wall surface 1, but it is also possible to spray a mixture of a fiber material and an adhesive onto the brick wall surface 1 using a spray gun or the like. It is. In short, it is sufficient to form a reinforcing layer containing reinforcing fibers on the brick wall surface 1.

Furthermore, although the above embodiments have been explained with reference to the case of reinforcing the brick wall surface 1, the present invention is of course applicable to other materials such as masonry walls made of reinforced concrete block materials, etc., and can be applied to a wide range of masonry wall surfaces. It can be used as a reinforcing means.

Furthermore, although the embodiments and examples describe the case of reinforcing the masonry wall surface 1 of an existing structure, the present invention can also be applied to the case of constructing a new masonry wall surface. It goes without saying.

Other specific configurations such as the masonry mode of the brick wall surface 1 can also be freely changed in design within the scope of the present invention.

(Effects of the Invention) As described above, since the present invention forms a reinforcing layer containing reinforcing fiber material on a masonry wall surface, the construction work is different from the conventional reinforcement called the so-called external preservation method. It is not complicated and can be done very easily and quickly, and it is only necessary to provide a reinforcing layer on the existing masonry wall surface, so it is not only suitable for new wall masonry, but also for existing masonry. It can also be applied to reinforcing walls, and therefore has a particularly remarkable effect in that it can be applied in a very wide range of areas.

The tensile strength of a masonry wall surface provided with a reinforcing layer containing reinforcing fibers is significantly increased by the reinforcing TA fibers, which has the great effect of greatly improving its seismic resistance. .

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 show one embodiment of the present invention.
The figure is a front view of a brick wall, Figure 2 (a) is a front view showing a sheet material glued to one side of a brick wall, and Figure
) is an X-ray cross-sectional view of the same figure (A). Figures 3 (a) to (c) show specimens used in earthquake resistance tests on brick walls. Figure 4 shows the condition of the earthquake resistance test on the brick wall surface, and the figure (a)
is a front view, and (D) is a side view.

Claims (1)

[Scope of Claims] 1. A structure of a masonry wall surface such as a building, characterized in that a reinforcing layer 4 containing reinforcing fibers is formed on at least one side of a masonry wall surface 1. 2. The masonry wall surface 1 is reinforced by forming a reinforcing layer 4 containing reinforcing fibers on at least one side of the masonry wall surface 1 on which the masonry object 2... is masonry. A reinforcement method for masonry walls.