JP4874416B1 - Reinforcement method for brick structure - Google Patents

Abstract

The present invention provides a method for reinforcing a brick structure that is easy to construct, does not expose a structural material to the exterior or interior, and exhibits a high reinforcing effect.
A method of reinforcing a brick structure by embedding a reinforcing material made of fiber reinforced plastic rods in a joint part of an existing brick structure, wherein a horizontal groove part 20 is formed along the horizontal joint part 12. Forming the vertical groove portion 21 communicating with the horizontal groove portion 20 along the vertical joint portion 13, filling the bottom portion of the horizontal groove portion 20 and the vertical groove portion 21 with the filler 18, and the vertical reinforcing member 15. The bent portion 15b formed at the end of the horizontal groove portion 20 is set on the filler 18 of the horizontal groove portion 20, and the non-bent portion 15a of the vertical reinforcing member 15 is set on the filler 18 of the vertical groove portion 21. A step of setting the horizontal groove portion 20, and a step of filling the horizontal groove portion 20 and the vertical groove portion 21 with the filler 18 and sealing the horizontal groove portion 20 and the vertical groove portion 21.
[Selection] Figure 1

Description

The present invention relates to a method for reinforcing an existing brick structure.

Many existing brick buildings have low earthquake resistance, so in Japan, which is a country with frequent earthquakes, it is necessary to reinforce brick buildings. Reinforcement methods such as attaching steel plates or carbon fiber sheets to brick walls are common, but because structural materials are exposed to the exterior and interior, it becomes a problem both in terms of design and use of buildings. Yes.

Therefore, as a reinforcing method in which the structural material is not exposed to the appearance or the interior, in Patent Document 1, a reinforcing unit configured in a three-dimensional lattice shape is inserted into the joint between the masonry bodies, and the reinforcing unit is fixed with the joint material. An invention of a masonry structure is disclosed.

Patent Document 2 discloses an invention of a brick wall surface peeling prevention method in which a reinforcing material made of aramid fiber or carbon fiber is disposed only at a joint. In the present invention, various shape patterns of the reinforcing material are manufactured in advance in a factory, and these reinforcing material nets are cut and arranged at the construction site.

Japanese Utility Model Publication No. 6-71617 JP 2003-293893 A

However, in the case of the invention described in Patent Document 1, since the reinforcing unit is a three-dimensional lattice, there is a problem that the reinforcing unit cannot be inserted unless a deep groove is formed in the joint portion, and it takes time for construction. On the other hand, the invention described in Patent Document 2 has a difficulty in strength because it only affixes the reinforcing material net to the joint, and if the reinforcing range is wide, a plurality of reinforcing material nets must be affixed, There is a problem that a plurality of joints that are weak in strength are generated.

In addition, since a brick building by site construction is inevitably accompanied by construction errors, as in the inventions described in Patent Document 1 and Patent Document 2, when a pre-manufactured reinforcement unit or a reinforcing material net is used, reinforcement is performed. In addition to the possibility of the unit or reinforcement net installation position deviating from the specified position, the brick's long side and small edge surface appear in brick structures built in the UK and France, so the shape of the reinforcement unit and the reinforcement net There is also a problem that the cost is inevitably increased due to complexity.

The present invention has been made in view of such circumstances, and an object thereof is to provide a method for reinforcing a brick building that is easy to construct, does not expose a structural material to the appearance and interior, and exhibits a high reinforcing effect. .

In order to achieve the above object, the first invention is a method for reinforcing a brick structure by embedding a horizontal reinforcing material and a vertical reinforcing material made of fiber reinforced plastic rods in a joint part of an existing brick building. Forming a horizontal groove portion along the horizontal joint portion, and forming a vertical groove portion communicating with the horizontal groove portion along the vertical joint portion, and each bottom portion of the horizontal groove portion and the vertical groove portion. Filling the filler with the filler, and setting the bent portion formed at at least one end of the vertical reinforcing material to the filler filled in the horizontal groove portion, and unfolding the vertical reinforcing material after setting the filling material filled in the vertical groove portion, and a step of setting the horizontal groove along the horizontal stiffener to the bent portion of the vertical reinforcement, the horizontal groove portion and the vertical groove portion It is characterized by comprising a step of sealing the horizontal groove portion and 該鉛 groove straight by filling the filling material.

The second invention is a method of reinforcing a brick building by embedding a horizontal reinforcing member and a vertical reinforcing member made of fiber reinforced plastic rods in a joint part of an existing brick building, to form a horizontal groove along the joint portion, the horizontal groove portion and communicating, forming along the horizontal groove portion and same depth vertical the joint portion in the vertical groove portion to have a, the horizontal groove portion and A step of filling each bottom of the vertical groove with a filler, and after the horizontal reinforcing member is set in the filler filled in the horizontal groove, bending formed on at least one end of the vertical reinforcing member while set in the horizontal groove along the horizontal stiffener part, by filling a step of setting the vertical groove portion a non-bent portion of該鉛straight reinforcement, said filler to said horizontal groove portion and the vertical groove portion It is characterized by comprising a step of sealing the horizontal groove portion and 該鉛 groove straight.

Here, “setting the horizontal reinforcing material or the vertical reinforcing material to the filler” means that the horizontal reinforcing material or the vertical reinforcing material is pushed into the filling material, and the horizontal reinforcing material or the vertical reinforcing material is arranged on the filling material. Including.

In the method for reinforcing a brick building according to the first and second inventions, since the horizontal reinforcing material and the vertical reinforcing material are not integrated in advance, it can easily cope with a brick building having a construction error. be able to. At that time, since the bent part formed at at least one end of the vertical reinforcing material follows the horizontal reinforcing material, the horizontal reinforcing material and the vertical reinforcing material after construction are integrated, and the seismic strength of the brick building Can be increased.

In the method for reinforcing a brick structure according to the first and second inventions, the horizontal reinforcing member may have the same diameter as the vertical reinforcing member or a larger diameter than the vertical reinforcing member.
In the past earthquake damage, many brick buildings collapsed by out-of-plane bending failure from the top of the wall have been confirmed. In the first and second inventions, the out-of-plane bending failure of a brick structure (particularly the horizontal plane that is most likely to occur in a brick wall extending in the horizontal direction and whose center portion is deformed out of plane with the horizontal end portions as fulcrums. In order to prevent internal bending failure, the horizontal reinforcing material that mainly resists bending in the horizontal plane has the same diameter or a large diameter as the vertical reinforcing material.

In the method for reinforcing a brick structure according to the first and second inventions, the filler is preferably resin mortar.
Resin mortar not only provides high strength in a short time, but also has excellent properties as a reinforcing material such as a small volume change and no shrinkage.

In the method for reinforcing a brick structure according to the first and second inventions, it is preferable that the fiber constituting the fiber-reinforced plastic rod is an aramid fiber or a carbon fiber.
Since aramid fibers and carbon fibers have high tensile strength and high rigidity, a reinforcing material having high tensile strength can be obtained by forming a fiber-reinforced plastic rod using aramid fibers or carbon fibers.

In the method for reinforcing a brick structure according to the first and second inventions, it is preferable that an ultraviolet ray inhibitor is applied to the surface of the filler that seals the horizontal groove and the vertical groove.
Fibers that make up fiber reinforced plastic rods, especially aramid fibers, discolor and lose strength when exposed to ultraviolet rays, so by applying a UV protection agent to the surface of the filler covering the reinforcing material, Deterioration can be prevented.

In the method for reinforcing a brick building according to the present invention, the horizontal reinforcing material and the vertical reinforcing material made of fiber reinforced plastic rods are respectively embedded in the joints of the existing brick building, so that the structural material is exposed to the external appearance and interior view. Not only can it be applied, but it can also be easily applied to brick buildings with construction errors. In addition, since the bent portion formed at at least one end of the vertical reinforcement is aligned with the horizontal reinforcement, the horizontal reinforcement and the vertical reinforcement after construction are integrated, and the seismic strength of the brick building is improved. Can be increased.

It is the schematic diagram which looked at the brick wall reinforced by the reinforcement method of the brick building which concerns on the 1st Embodiment of this invention from the front. It is AA arrow sectional drawing of FIG. It is a fragmentary longitudinal cross-sectional view of the brick wall which showed 1 process of the reinforcement method of the brick building which concerns on the 1st Embodiment of this invention. It is the fragmentary longitudinal cross-sectional view of the brick wall which showed 1 process of the reinforcement method. It is the fragmentary longitudinal cross-sectional view of the brick wall which showed 1 process of the reinforcement method. It is the fragmentary longitudinal cross-sectional view of the brick wall which showed 1 process of the reinforcement method. It is the fragmentary longitudinal cross-sectional view of the brick wall which showed 1 process of the reinforcement method. It is a schematic diagram for demonstrating the influence of the construction error of a brick wall with respect to the reinforcement method. It is a schematic diagram for demonstrating the influence of the construction error of a brick wall at the time of using the vertical reinforcement material which concerns on a modification. It is the schematic diagram which looked at the brick wall reinforced with the reinforcement method of the brick building concerning the 2nd Embodiment of this invention from the front. It is the schematic diagram which looked at the brick wall reinforced by the reinforcement method of the brick building concerning the 3rd Embodiment of this invention from the front. It is the schematic diagram which looked at the brick wall reinforced by the reinforcement method of the brick building concerning the 4th Embodiment of this invention from the front. It is BB arrow sectional drawing of FIG. It is the fragmentary longitudinal cross-sectional view of the brick wall which showed 1 process of the reinforcement method. It is the fragmentary longitudinal cross-sectional view of the brick wall which showed 1 process of the reinforcement method. It is the fragmentary longitudinal cross-sectional view of the brick wall which showed 1 process of the reinforcement method. The schematic diagram which looked at the test body used for the yield strength test of a brick wall from the front is shown, (A) is Example 1, (B) is Comparative Example 1. FIG. It is a schematic diagram for demonstrating the method of applying a brick wall. It is a load-displacement curve of the test body which uses the mortar containing lime for the joint material.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.

[First Embodiment]
FIG. 1 is a schematic view of a brick wall 10 (an example of a brick building) reinforced by the method for reinforcing a brick building according to the first embodiment of the present invention, and FIG. FIG. 2 shows a cross-sectional view taken along arrow A (the uppermost part and the lowermost part are not shown). Since the horizontal reinforcing member 14 is embedded in the horizontal joint portion 12 and the vertical reinforcing member 15 is embedded in the vertical joint portion 13, respectively, the horizontal reinforcing member 14 and the vertical reinforcing member 15 (unfolded portion 15a) should be indicated by hidden lines in FIG. However, in order to clarify the installation positions of the horizontal reinforcing member 14 and the vertical reinforcing member 15, they are shown by solid lines.

Here, taking a British brick wall as an example, a method for reinforcing a brick structure according to the first embodiment of the present invention will be described. British loading is a method of loading bricks so that when the brick wall is viewed from the front, the steps where only the long side of the brick appears and the steps where only the small edge appears are alternated. It is said that it is stronger than French masonry, where the long side and the small side are shown alternately, and uses less bricks. It is often found in civil engineering structures and railway-related facilities.

As shown in FIG. 1, in the method for reinforcing a brick structure according to the first embodiment of the present invention, horizontal reinforcement consisting of fiber reinforced plastic rods is provided on all horizontal joint portions 12 included in the region to be reinforced. For the vertical joint 13 included in the region to be reinforced, the material 14 is embedded, and all the vertical joints 13 of the step where only the longitudinal surface of the brick 11 appears and about the step where only the small edge surface appears. A vertical reinforcing member 15 made of a fiber reinforced plastic rod is embedded in every other vertical joint 13 selected.
As will be described later, the bent portion 15b of the vertical reinforcing member 15 and the horizontal reinforcing member 14 are in the horizontal groove portion 20 formed along the horizontal joint portion 12, and the unfolded portion 15a of the vertical reinforcing member 15 is in the vertical joint portion 13. It arrange | positions in the vertical groove part 21 formed along, and the horizontal groove part 20 and the vertical groove part 21 are sealed with the filler 18 (refer FIG. 2).

The vertical reinforcing member 15 may have the same diameter as the horizontal reinforcing member 14 or a smaller diameter than the horizontal reinforcing member 14. Both ends of the vertical reinforcing member 15 are bent in the same direction to form bent portions 15b, and are formed in a U shape in plan view. When arranging the vertical reinforcing member 15, the bent portion 15 b of the vertical reinforcing member 15 is arranged in the horizontal groove portion 20 communicating with the vertical groove portion 21, and the non-bending portion 15 a constituting the intermediate portion of the vertical reinforcing member 15 is set vertically. It arrange | positions in the groove part 21. FIG.

The fiber reinforced plastic rod constituting the horizontal reinforcing material 14 and the vertical reinforcing material 15 is a round bar having a diameter of about 3 mm to 15 mm in which a large number of reinforcing fibers arranged in the length direction are impregnated with a resin and hardened. As the reinforcing fiber, an aramid fiber or carbon fiber having high tensile strength and high rigidity is used. For example, “Phibra AFRP rod” (Phi-Abrad fiber) made of polyparaphenylene terephthalamide fiber (Toray Dupont Co., Ltd., “Kevlar” (registered trademark)), which is a para-aramid fiber, is braided and cured with epoxy resin. Bex Corporation) is lightweight, high-strength, high-elasticity and excellent in durability, and can be used as the horizontal reinforcing material 14 and the vertical reinforcing material 15.

As the filler 18, for example, a synthetic resin such as an epoxy resin, a cement slurry, an inorganic filler such as a non-shrink mortar, or a resin mortar in which a mortar and a synthetic resin are mixed can be used. Among them, the resin mortar is a material that is high in strength in a short time, has a small volume change and is non-shrinkable, and is less expensive than a synthetic resin. In addition, the pot life (time from kneading to curing) can be controlled. Table 1 shows an example of the resin mortar, and Table 2 shows the performance test results of the resin mortar.

Next, a method for reinforcing a brick building according to the first embodiment of the present invention will be described in detail.
(1) A curing tape 22 is attached to the surface of the brick 11 so that the brick 11 constituting the existing brick wall 10 is not soiled or damaged (see FIG. 3).
(2) For all the horizontal joints 12 included in the region to be reinforced, the horizontal grooves 20 along the horizontal joints 12 are formed using a grinder or the like (see FIG. 3). The horizontal groove 20 has the same width as the horizontal joint 12. Further, the vertical joints 13 included in the region to be reinforced include all the vertical joints 13 where only the longitudinal surface of the brick 11 appears, and the vertical joints 13 selected every other step where only the small edge surface appears. A vertical groove portion 21 along the joint portion 13 is formed using a grinder or the like (see FIG. 3). The width of the vertical groove portion 21 is the same as that of the vertical joint portion 13. In addition, the horizontal groove part 20 and the vertical groove part 21 are connected, and let it be the same depth (depth of about 40-70 mm from the surface of the brick 11).

(3) The inside of the horizontal groove part 20 and the vertical groove part 21 is cleaned, and the primer 19 is apply | coated to the surface of the horizontal groove part 20 and the vertical groove part 21 (refer FIG. 4). The primer 19 is applied in order to improve the adhesion between the filler 18 and the brick 11, the horizontal joint portion 12, and the vertical joint portion 13, but is not necessarily applied.
(4) Fill the bottoms of the horizontal grooves 20 and the vertical grooves 21 with the filler 18 with a caulking gun or the like. In that case, the thickness of the filler 18 shall be about 10-30 mm.
(5) When the filler 18 is cured to some extent, the bent portion 15b formed at one end portion of the vertical reinforcing member 15 is connected to one horizontal groove portion 20 communicating with the vertical groove portion 21 at the other end portion. The formed bent portion 15b is disposed in the other horizontal groove portion 20 communicating with the vertical groove portion 21 and the non-bent portion 15a of the vertical reinforcing member 15 is disposed in the vertical groove portion 21, and the vertical reinforcing member 15 is pushed into the filler 18. Temporarily fix (see FIG. 5).

(6) The horizontal reinforcing member 14 is disposed in the horizontal groove portion 20 along the bent portion 15 b of the vertical reinforcing member 15. Then, using a caulking gun or the like, the horizontal reinforcing member 14 is temporarily fixed to the substantially hardened filler 18 via the filler 18 at intervals of 300 to 500 mm (see FIG. 6).
The horizontal reinforcing member 14 and / or the vertical reinforcing member 15 do not necessarily have to be temporarily fixed in the horizontal groove portion 20 or the vertical groove portion 21 with the filler 18, but by temporarily fixing, the horizontal reinforcing member 14 or The vertical reinforcing material 15 does not fall and workability is improved.
(7) Fill the horizontal groove portion 20 and the vertical groove portion 21 with the filler 18 with a caulking gun or the like to seal the horizontal groove portion 20 and the vertical groove portion 21 (see FIG. 7). In that case, the covering thickness of the filler 18 with respect to the horizontal reinforcing material 14 shall be about 10-30 mm.

In addition, when using an epoxy resin etc. as the filler 18, it is preferable to apply | coat an ultraviolet-ray inhibitor (illustration omitted) to the surface of the filler 18 which seals the horizontal groove part 20 and the vertical groove part 21. FIG. For example, a fluorine-based resin paint can be used as the ultraviolet ray preventing agent.

Further, the brick wall 10 may be divided into a plurality of regions according to the expected damage level, and the degree of reinforcement may be changed depending on the region. That is, the region where the joints are reinforced with the horizontal reinforcing member 14, the vertical reinforcing member 15, and the filler 18, the region where the joints are reinforced with the horizontal reinforcing member 14 and the filler 18, and the joints only with the filler 18. The brick wall 10 may be reinforced by combining the region to be reinforced and the existing region.

In the longitudinal sectional view of the brick wall 10 (FIG. 2, FIG. 7, etc.), the surfaces of the brick 11 and the filler 18 are drawn so as to be flush with each other, but in order to have continuity with the existing joint surface, It is preferable to restore the same design as before the reinforcement so that the surface of the filler 18 is set back 5 to 10 mm from the surface of the brick 11.

In addition, although the depth of the horizontal groove part 20 and the vertical groove part 21 was about 40-70 mm from the surface of the brick 11, specifically, the thickness of the filler 18 with which the bottom part of the horizontal groove part 20 and the vertical groove part 21 is filled. The amount of the vertical reinforcing member 15 pushed into the filler 18, the diameter of the horizontal reinforcing member 14 and the vertical reinforcing member 15, the covering thickness of the filler 18 with respect to the horizontal reinforcing member 14, and the set of the surface of the filler 18 with respect to the brick 11 surface Determined from the back amount.

By the way, although the brick wall by site construction is inevitably accompanied by a construction error, a case where the construction error is large will be described.
FIG. 8 shows a case where the widths of the horizontal joint portion 12u formed along the upper edge of the brick 11 and the horizontal joint portion 12d formed along the lower edge of the brick 11 are different. As shown in the figure, by using the U-shaped vertical reinforcing member 15, even if some joint widths are different, the prescribed vertical reinforcing member 15 can be used.

FIG. 9 shows a case where some bricks 11 ′ have different sizes. In this case, instead of the U-shaped vertical reinforcing member 15, the L-shaped vertical reinforcing member 16 may be used in a plan view in which a bent portion 16 b is formed only at one end. Specifically, the bent portion 16b of one vertical reinforcing member 16 is set on the horizontal joint portion 12u ′ formed along the upper edge of the brick 11 ′, and the horizontal reinforcing member 14u is disposed along the bent portion 16b. At the same time, the unfolded portion 16 a of one vertical reinforcing member 16 is set in the vertical joint portion 13. Moreover, while setting the bending part 16b of the other vertical reinforcing material 16 to the horizontal joint part 12d 'formed along the lower edge of the brick 11', and arranging the horizontal reinforcing material 14d along the bending part 16b, The unfolded portion 16 a of the other vertical reinforcing member 16 is set in the vertical joint portion 13. Therefore, in the vertical joint portion 13, the two non-bent portions 16 a of the vertical reinforcing members 16 are overlapped.

[Second and third embodiments]
10 and 11 show the brick wall 10 reinforced by the brick wall reinforcing methods according to the second and third embodiments of the present invention, respectively.
In the second embodiment shown in FIG. 10, the horizontal reinforcing material 14 is embedded in all the horizontal joints 12 included in the region to be reinforced, and all the vertical joints 13 included in the region to be reinforced are used. A U-shaped vertical reinforcing material 15 is embedded. At that time, for the vertical joint portion 13 where only the longitudinal surface of the brick 11 appears, the two vertical reinforcement members 15 are embedded so that the vertical reinforcement member 15 is symmetrical with respect to the vertical joint portion 13.
Further, in the third embodiment shown in FIG. 11, the bent portion 17b formed at one end portion and the bent portion 17c formed at the other end portion are bent in opposite directions in plan view. A vertical reinforcing member 17 having a staircase shape is used in place of the U-shaped vertical reinforcing member 15. Reference numeral 17a denotes an unbent portion.

[Fourth Embodiment]
FIG. 12 is a schematic view of a brick wall 10 (an example of a brick building) reinforced by the method for reinforcing a brick building according to the fourth embodiment of the present invention, and FIG. FIG. 13 shows a cross-sectional view along arrow B (the uppermost part and the lowermost part are not shown). As in FIG. 1, the horizontal reinforcing member 14 and the vertical reinforcing member 15 should be indicated by hidden lines in FIG. 12, but are indicated by solid lines in order to clarify the installation positions of the horizontal reinforcing member 14 and the vertical reinforcing member 15. .

The present embodiment is different from the first to third embodiments in that after the horizontal reinforcing member 14 is disposed in the horizontal groove portion 20, the vertical reinforcing member 15 is disposed in the horizontal groove portion 20 and the vertical groove portion 21 ( (See FIG. 13). Hereinafter, the construction method will be described.
(1) A curing tape 22 is attached to the surface of the brick 11 so that the brick 11 constituting the existing brick wall 10 is not soiled or damaged (see FIG. 14). And about all the horizontal joint parts 12 contained in the area | region which should be reinforced, while forming the horizontal groove part 20 along the horizontal joint part 12 using a grinder etc., only the longitudinal surface of the brick 11 contained in the area | region which should be reinforced For all vertical joints 13 in the step where the ridges appear, and for the vertical joints 13 selected almost every other step where only the small facet appears, the vertical joints 21 communicating with the horizontal grooves 20 are connected to the vertical joints using a grinder or the like. It forms along the part 13 (refer FIG. 14). The depth of the horizontal groove 20 and the vertical groove 21 is about 40 to 70 mm from the surface of the brick 11.
(2) The inside of the horizontal groove part 20 and the vertical groove part 21 is cleaned, and the primer 19 is applied to the surfaces of the horizontal groove part 20 and the vertical groove part 21 (see FIG. 14).
(3) Fill the bottoms of the horizontal grooves 20 and the vertical grooves 21 with the filler 18 with a caulking gun or the like. In that case, the thickness of the filler 18 shall be about 10-30 mm.

(4) When the filler 18 is cured to some extent, the horizontal reinforcing member 14 is disposed in the horizontal groove portion 20, and is pushed into the filler 18 to be temporarily fixed (see FIG. 14).
(5) The bent portion 15b formed at one end of the vertical reinforcing member 15 is placed along the horizontal reinforcing member 14 set in one horizontal groove portion 20 communicating with the vertical groove portion 21, and the vertical reinforcing member 15 With the bent portion 15b formed at the other end aligned with the horizontal reinforcing member 14 set in the other horizontal groove portion 20 communicating with the vertical groove portion 21, the unfolded portion 15a of the vertical reinforcing member 15 is vertically It arrange | positions in the groove part 21 (refer FIG. 15). Then, using a caulking gun or the like, the vertical reinforcing member 15 is temporarily fixed to the substantially hardened filler 18 via the filler 18.
(6) Fill the horizontal grooves 20 and the vertical grooves 21 with the filler 18 with a caulking gun or the like to seal the horizontal grooves 20 and the vertical grooves 21 (see FIG. 16). In that case, the covering thickness of the filler 18 with respect to the vertical reinforcing material 15 shall be about 10-30 mm.

In addition, when using an epoxy resin etc. as the filler 18, it is preferable to apply | coat an ultraviolet-ray inhibitor (illustration omitted) to the surface of the filler 18 which seals the horizontal groove part 20 and the vertical groove part 21. FIG.

Next, the proof stress test conducted in order to confirm the reinforcement effect of the brick wall reinforced by the brick building reinforcement method according to the present invention will be described.
FIG. 17 shows the shape of the specimen. FIG. 17A shows a brick wall 23 that is a first embodiment reinforced by this reinforcing method, and FIG. 17B shows an unreinforced brick wall 24 as a first comparative example. The size of the brick 25 used is 210 mm in the longitudinal direction, 100 mm in the short direction, and 60 mm in height. The joint material was mortar containing lime, and the joint width was 10 mm.

The test bodies are a total of two bodies of Example 1 in which the joint portion of the brick wall is reinforced and Comparative Example 1 which is an unreinforced brick wall. The horizontal reinforcing member 26 is a fibre-AFRP rod (manufactured by Fivex Co., Ltd.) RA5 having a nominal diameter of 5.7 mm, and the vertical reinforcing member 27 is a fibra AFRP rod (manufactured by Fivex Co., Ltd.). ) Using RA3, only one side of the brick wall 23 was reinforced. Moreover, the resin mortar shown in Table 1 and Table 2 was used for the filler which fills a horizontal groove part and a vertical groove part.

FIG. 18 shows a force application method. Each of the brick walls 23 and 24, which are test specimens, is placed on a PTFE plate (not shown) with a small sliding friction, and the horizontal ends of the brick walls 23 and 24 are used as support points 29, so that the brick walls 23 and 24 Brick walls 23 and 24 were gradually increased in the out-of-plane direction by hydraulic actuators (not shown) through two applied points 28 in the center. In addition, a load cell (not shown) is installed at the tip of the hydraulic actuator to sequentially measure the load load, and a differential transformer type displacement meter 30 is installed at both ends and the center of the brick walls 23 and 24. The deformation amounts of the walls 23 and 24 were measured sequentially.

A load-displacement curve of the test body is shown in FIG. In Example 1, the load was 59.5 kN, and the yield strength increased even after bending cracking occurred. Then, at a load of 88.4 kN, a shear crack was generated, and at a load of 96.5 kN, one support point 29 was sheared and broken at the end of the flange. There was no progress in bending cracks.
On the other hand, in Comparative Example 1, with a load of 28.4 kN, vertical bending cracks occurred in the center of the brick wall, and immediately out-of-plane bending failure occurred.
From these experiments, it was clarified that the brick wall reinforced by this reinforcing method does not break out of plane and shows high strength.

Although the embodiments of the present invention have been described above, the present invention is not limited to the configurations described in the above-described embodiments, and is considered within the scope of the matters described in the claims. Other embodiments and modifications are also included. For example, in the above-described embodiment, a brick wall has been described as an example of a brick building, but it goes without saying that the present reinforcing method can also be applied to brick columns, piers, and the like. Similarly, in the above-described embodiment, the description has been given by taking an example of a brick wall in the UK, but it goes without saying that the present invention can be applied to other types of bricks such as French, longitudinal and small piles.

10, 23, 24: brick wall (an example of a brick building), 11, 11 ′, 25: brick, 12, 12u, 12d, 12u ′, 12d ′: horizontal joint portion, 13: vertical joint portion, 14, 14u, 14d, 26: horizontal reinforcing material, 15, 16, 17, 27: vertical reinforcing material, 15a, 16a, 17a: unfolded part, 15b, 16b, 17b, 17c: bent part, 18: filler, 19: Primer, 20: Horizontal groove, 21: Vertical groove, 22: Curing tape, 28: Force point, 29: Support point, 30: Displacement meter

Claims (6)

A method of reinforcing a brick building by embedding a horizontal reinforcing member and a vertical reinforcing member made of fiber reinforced plastic rods in a joint part of an existing brick building,
Forming a horizontal groove portion along the horizontal joint portion, and forming a vertical groove portion communicating with the horizontal groove portion along the vertical joint portion, and a filler at each bottom of the horizontal groove portion and the vertical groove portion And a bending portion formed at at least one end of the vertical reinforcing material is set in the filling material filled in the horizontal groove portion, and a non-folding portion of the vertical reinforcing material is set as the vertical groove portion. Setting the horizontal reinforcing material in the horizontal groove along the bent portion of the vertical reinforcing material, and filling the horizontal groove and the vertical groove with the filler. And a step of sealing the horizontal groove portion and the vertical groove portion. A method of reinforcing a brick building by embedding a horizontal reinforcing member and a vertical reinforcing member made of fiber reinforced plastic rods in a joint part of an existing brick building,
To form a horizontal groove along horizontal the joint portion, the steps of the horizontal groove and communicating, formed along the horizontal groove portion and same depth vertical the joint portion in the vertical groove portion to have a, the horizontal A step of filling the bottom of each of the groove and the vertical groove with a filler, and after setting the horizontal reinforcing material on the filler filled in the horizontal groove, the vertical reinforcing material is formed on at least one end of the vertical reinforcing material. A step of setting the bent portion along the horizontal reinforcing material in the horizontal groove portion, and setting a non-folded portion of the vertical reinforcing material in the vertical groove portion, and filling the horizontal groove portion and the vertical groove portion with the filler. And a step of sealing the horizontal groove portion and the vertical groove portion. 3. The method for reinforcing a brick building according to claim 1, wherein the horizontal reinforcing member has the same diameter as the vertical reinforcing member or a larger diameter than the vertical reinforcing member. . The method for reinforcing a brick structure according to any one of claims 1 to 3, wherein the filler is a resin mortar. The method of reinforcing a brick structure according to any one of claims 1 to 4, wherein the fiber constituting the fiber-reinforced plastic rod is an aramid fiber or a carbon fiber. Reinforcement method. 6. The method of reinforcing a brick structure according to claim 1, wherein an ultraviolet ray inhibitor is applied to a surface of a filler that seals the horizontal groove portion and the vertical groove portion. How to reinforce a building.

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