KR102606872B1 - Seismic Reinforcement Construction Method And Structure Of Masonry Wall With Improved Workability - Google Patents

Abstract

The present invention is a seismic reinforcement method that can shorten the length of the joining device to reduce weight while exhibiting the same or improved seismic performance and can be used according to the circumstances of the installation location. In particular, it can be used to connect the upper and lower layers to provide integrated reinforcement. and structures.

Description

{Seismic Reinforcement Construction Method And Structure Of Masonry Wall With Improved Workability}

The present invention relates to a seismic reinforcement method and structure for a masonry wall with improved constructability, and more specifically, to shorten the length of the joining device to reduce weight, while demonstrating the same or improved seismic performance, and to be used according to the circumstances of the installation location. It is possible, and in particular, it relates to a seismic reinforcement method and structure that can connect the upper and lower layers and reinforce them for integrated behavior.

The frequency of domestic earthquakes is gradually increasing, and public anxiety about earthquake disaster prevention is increasing due to the recent Gyeongju earthquake and Pohang earthquake. In addition, the number of public buildings older than 20 years after completion is approximately 45% as of 2016, and is expected to continue to increase to 150,000 buildings in 2030. SOC facilities have secured a seismic rate of 62.3% (as of 2018), but the seismic rate of public buildings is around 35%, which is significantly lower than other facilities.

Methods currently used for seismic reinforcement of buildings include seismic reinforcement using steel braces and new or expanded RC shear walls. Seismic reinforcement using steel braces is installed on the outside of a building in a grid shape, diagonal shape, X shape, or a combination thereof. In this seismic reinforcement method, the cross section is determined by the compressive buckling strength of the brace when designing the seismic reinforcement member, so the cross section becomes very large, the amount of steel and construction cost increases, and the lighting ratio decreases as the brace partially covers the window. In addition, there is a problem that makes people feel psychologically intimidated. In addition, masonry walls must be demolished and foundation reinforcement must be done, which requires large-scale equipment and significantly increases the amount of construction. Additionally, a separate fire-resistant finish is required during construction, and there is a risk of corrosion of the steel plate after construction.

The new or expansion method of the RC shear wall is the most common and has the advantages of being inexpensive and having extensive construction experience. However, in the case of RC shear walls, it is difficult to install various openings (windows, doors, etc.), which changes the indoor and outdoor usage environment and limits natural lighting and visibility, and the construction process and work for integration with the existing structure is complicated. The wet construction method takes a long time, making it difficult to use the building during construction, and the difficulty of the work is high due to work in a small space, so the construction period is delayed, it is greatly affected by construction environmental conditions, and there is a lot of construction noise. There are problems that arise.

Accordingly, it is necessary to develop a seismic reinforcement method that has excellent seismic energy absorption ability on the masonry surface, does not require foundation reinforcement work, and requires minimal demolition during construction, thereby significantly reducing the amount of construction.

As part of this need, the present inventor applied for Korean Patent No. 10-2021-0100880 on July 30, 2021 under the title of 'Earthquake-resistant reinforcement method and structure of masonry wall' and granted it on February 2, 2022 as Registered Patent No. 10-2365116. It has been registered on 15. (hereinafter referred to as ‘prior art’).

The above prior art minimizes the demolition of existing masonry walls or reinforced concrete walls, so there is no need to restrict indoor use even during seismic reinforcement construction and foundation reinforcement is not required, so construction efficiency and economic feasibility can be superior to the prior art. A construction method and structure that can exhibit superior fire safety, high durability, and high weather resistance, and can exhibit better earthquake resistance and damage control performance than conventional technologies, and is excellent in safety against hazardous substances as no hazardous substances are generated during construction. It's about.

In this prior art, a stress transfer member is used to combine with a mesh and a high-toughness composite while combining with a chemical anchor. The stress transfer member includes a plate with a hole through which the chemical anchor can be inserted, and a bar with one end mounted on the plate and the other end protruding from one side of the plate and arranged in parallel.

However, these stress transfer members were able to sufficiently transfer the shear force (seismic, lateral force, etc.) transmitted from the beam to the installed plate, but the shear force was concentrated in the stress transfer device, making it difficult to effectively transfer stress to the high-toughness composite surface, resulting in further improved seismic performance. I couldn't use it.

In addition, since the conventional stress transmission member is integrated with a plate that is long in one direction and a plurality of rods mounted parallel to the plate, the weight of the member causes the problem of inserting and fixing a chemical anchor difficult to construct.

Republic of Korea Patent No. 10-2365116 (2022.02.23.)

The present invention was developed in consideration of the above problems, and the purpose of the present invention is to provide a seismic reinforcement method and structure that exhibits the same or improved seismic performance while shortening the length of the joining device to reduce weight.

Another object of the present invention is to provide a seismic reinforcement method and structure that can be used according to the circumstances of the installation location and, in particular, can be reinforced to achieve integrated behavior by connecting the upper and lower layers.

The present invention relates to a seismic reinforcement method for a masonry wall with improved constructability, according to the characteristics for achieving the above-described object, including the steps of drilling horizontally from the outside of the upper beam and lower beam and then installing a chemical anchor; Mounting the joining device to the upper beam and the lower beam by inserting the chemical anchor into the hole of a joining device that has an L-shaped cross-section, a through hole formed on each side, and a bolt installed upright on one side, and fastening a nut; Applying the first mortar to the reinforcing surface made of a masonry wall disposed between the surfaces of the upper beam and lower beam and the upper beam and lower beam, including a plurality of chemical anchors and joining devices installed outside the upper beam and lower beam. steps; Installing a net body composed of a mesh-shaped plane so that both ends are inserted into the chemical anchor and the bolt inside the first mortar; Mounting a connection pin longer than the mesh of the net to the bolt that has passed through the net to prevent the net from being separated from the bolt; And a step of applying a second mortar to the outer surface of the solidified first mortar in a state in which the net body and the joining device are buried.

And the connection pin is formed with a central portion bent so that both ends come into contact with each other, an entry portion is formed at both ends that expands to facilitate entry of the bolt, the entry portion is closed between the central portion and both ends, and the bolt inserted into the entry portion is seated. A fastening part that forms a fastening space by bending may be provided.

Additionally, the length of the joining device may be within a range of 4 to 7 times the length of one side of the L-shaped cross section.

Meanwhile, the seismic reinforcement structure of a masonry wall with improved constructability according to the present invention includes chemical anchors each installed in a plurality of holes drilled outside the upper beam and lower beam; A joining device that has an L-shaped cross-section, has holes formed on each side, has bolts installed so as to stand on one side, and is mounted on the upper and lower beams while inserting the chemical anchor into the through hole; A first mortar applied to a reinforcing surface made of a masonry wall disposed between the surfaces of the upper and lower beams and the upper and lower beams, including a plurality of chemical anchors and bonding devices installed outside the upper and lower beams; A mesh body in which the chemical anchor and the bolt of the joint device are installed inside the first mortar to pass through both ends and is composed of a mesh-shaped plane; A connecting pin configured to be longer than the mesh of the mesh to prevent separation of the mesh into which the bolt of the joint device is inserted and mounted on the bolt to support the mesh; and a second mortar applied to the outer surface of the solidified first mortar while the net body and the joining device are buried.

And the chemical anchor may be further provided with a nut that is mounted on the chemical anchor while pressing the joining device.

In addition, the connection pin has a central portion bent so that both ends come into contact with each other, an entry portion is formed at both ends to expand to facilitate entry of the bolt, the entry portion is closed between the central portion and both ends, and the bolt inserted into the entry portion is seated. A fastening part that forms a fastening space by bending may be provided.

Additionally, the length of the joining device may be within a range of 4 to 7 times the length of one side of the L-shaped cross section.

In addition, the connection pin may be mounted on the masonry wall perpendicular to the masonry wall and fastened to a tip exposed through the mesh to limit the position of the mesh.

According to the seismic reinforcement method and structure of a masonry wall according to the present invention, the length of the joint device is shortened to reduce weight, and an L-shaped cross section is adopted to respond to concentrated shear force, and constructability is improved by integrating with the chemical anchor, mesh, and mortar. However, it has the advantage of exhibiting improved seismic performance.

In addition, according to the present invention, it can be used according to the circumstances of the installation location, and in particular, it can be reinforced in an integrated manner by connecting the upper and lower layers, so there is an advantage in improving the reinforcement performance in the vertical direction of an aged building.

Figure 1 is a cross-sectional view showing a state in which the earthquake-resistant reinforcement structure according to the present invention is constructed on an edge beam;
Figure 2 is a plan view of the earthquake-resistant reinforcement structure shown in Figure 1;
Figure 3 is an enlarged view of part A of Figure 1;
Figure 4 is an enlarged view of part B of Figure 1;
Figure 5 is an enlarged view of part C of Figure 2;
Figure 6 is a cross-sectional view showing a state in which the earthquake-resistant reinforcement structure according to the present invention is constructed on a slab;
Figure 7 is a plan view of the earthquake-resistant reinforcement structure shown in Figure 6;
Figure 8 is a perspective view showing the configuration of the joining device according to the present invention;
9 is a plan view showing the configuration of a connection pin according to the present invention;
Figure 10 is a flow chart showing the seismic reinforcement method according to the present invention.

Hereinafter, the seismic reinforcement method and structure of a masonry wall with improved constructability according to the present invention will be described in detail along with the attached drawings.

First, the earthquake-resistant reinforcement structure according to the present invention will be described.

Figures 1 and 2 are cross-sectional views and plan views showing the seismic reinforcement structure according to the present invention constructed on the edge beam, and Figures 3 and 4 are enlarged views of portions A, B, and C in Figures 1 and 2. 6 and 7 are cross-sectional views and plan views showing the seismic reinforcement structure according to the present invention constructed on the slab.

As shown, the earthquake-resistant reinforcement structure according to the present invention is constructed outside the building to be strengthened, and largely consists of a chemical anchor 20, a joining device 30, first and second mortars 40a, 40b, It is composed of a net body (50) and a connecting pin (60).

The chemical anchor 20 is a joint device on the surface of the upper beam (Oa) and the lower beam (Ob) and the reinforcing surface (10) made of a masonry wall (W) disposed between the upper beam (Oa) and the lower beam (Ob). It is installed to install (30). Additionally, when an earthquake occurs, the chemical anchor 20 can more effectively transfer the stress generated on the reinforcing surface 10 to the joining device 30.

In detail, the chemical anchor 20 is installed in a plurality of holes drilled in the horizontal direction outside the upper beam (Oa) and the lower beam (Ob). The holes are drilled at regular intervals outside the upper beam (Oa) and the lower beam (Ob). After installing the chemical anchor 20 in the hole, epoxy is injected into the hole where the chemical anchor 20 is installed to fix the chemical anchor 20 more firmly.

The joint device 30 is installed on the upper beam (Oa) and the lower beam (Ob) in order to transfer the stress generated when an earthquake occurs to the first and second mortars (40a, 40b).

As shown in FIG. 8, the joining device 30 is made of a member that has an L-shaped cross-section and a length approximately 4 to 7 times the length of one side of the L-shaped cross-section. If it is less than 4 times, the number of installed joint devices 30 increases and it is difficult to respond to the concentrated shear force, and if it exceeds 7 times, there will be difficulties in field installation due to excessive weight.

In this way, the joining device 30 forms an L-shaped cross-section, so that the behavior of one side of the L-shaped cross-section, which is three-dimensionally arranged with respect to the reinforcing surface and is in close contact with the reinforcing surface, is limited or supported by the other side of the L-shaped cross-section to cope with a larger displacement. It becomes possible. Moreover, due to the other side of the L-shaped cross-section arranged in a direction perpendicular to the reinforcing surface, the mesh 50 supports the sides of the reinforced first and second mortars 40a and 40b, and is connected to the mesh 50 and the first and second mortars. Integrated behavior becomes possible.

In this joining device 30, through holes 31 are formed on each side, and on one side of the L-shaped cross section disposed on the reinforcing surface, bolts 32 are installed to stand between the through holes 31. That is, the body of the bolt 32 is mounted on one side of the joining device with the head of the bolt 32 positioned at the top, and the mounting method at this time is not particularly limited, but is generally joined by welding.

A chemical anchor is inserted into the hole 31 while mounted on the wall, and a nut 21, which will be described below, is fastened to the chemical anchor 20, thereby fixing the joining device 30 to the chemical anchor.

The first mortar 40a is applied to the reinforcing surface 10, including the plurality of chemical anchors 20 and joining devices 30 installed on the outside of the upper beam Oa and the lower beam Ob.

The mesh 50 has a reticulated planar shape, and the reinforcement surface 10 is used to more effectively transmit the stress generated on the reinforcement surface 10 when an earthquake occurs to the first and second mortars 40a and 40b. is installed in

The connection pin 60 is mounted on the bolt 32 to support the mesh body into which the bolt 32 of the joining device 30 is inserted to prevent the mesh body from being separated. The connecting pin 60 is formed by bending the central portion so that both ends come into contact with each other. At both ends, an entry portion 61 is formed that expands to facilitate entry of the bolt 32. The entry portion 61 is formed between the central portion and both ends. ) is closed and is provided with a fastening part 62 that forms a fastening space by bending so that the bolt 32 inserted into the entry part 61 is seated.

The nut 21 is installed to more tightly join the joining device 30 to the reinforcing surface 10, and presses the joining device 30 while pressing the joining device 30 to the chemical anchor 20. It is installed on.

The second mortar (40b) is applied to the reinforcing surface (10) where the first mortar (40a) has been solidified while the mesh (50) and the joining device (30) are buried.

In addition, the first and second mortars 40a and 40b of the earthquake-resistant reinforcement structure according to the present invention can absorb seismic energy and suppress damage to the reinforcement surface 10, and are manufactured with various mixing ratios using various components. It may be, preferably, 90 to 150 parts by weight of cement, 90 to 300 parts by weight of filler, 10 to 20 parts by weight of expansion material, 5 to 15 parts by weight of fluidizing agent, 5 to 20 parts by weight of fiber, based on 100 parts by weight of mixing water. It may be made of a high-toughness composite containing 5 to 10 parts by weight of a shrinkage reducing agent and 0.5 to 1 part by weight of a thickener.

In addition, a stress transfer device 70 is installed on the wall where the masonry is installed to integrate the masonry, the first mortar, and the mesh. The stress transfer device 70 is vertically fastened to the masonry wall, and a mesh 50 is installed so that the stress transfer device 70 is inserted. A connection pin is also provided to the stress transfer device to prevent the mesh from being separated from the stress transfer device. (60) is installed. This stress transfer device 70 can be configured in various configurations. In this embodiment, an anchor made of a triangular piece is installed with a knife block inserted.

Next, the first and second mortars according to the present invention will be described in detail.

As described above, the first and second mortars 40a and 40b contain 90 to 150 parts by weight of cement, 90 to 300 parts by weight of filler, 10 to 20 parts by weight of expansion material, and 5 to 15 parts by weight based on 100 parts by weight of mixing water. It can be manufactured as a high-toughness composite containing a fluidizing agent, 5 to 20 parts by weight of fiber, 5 to 10 parts by weight of a shrinkage reducing agent, and 0.5 to 1 part by weight of a thickener. Within this range, each component can exhibit excellent miscibility, and each component of the high-toughness composite can be mixed more evenly.

In more detail, the cement is used in the range of 90 to 150 parts by weight, more preferably 100 to 150 parts by weight, and even more preferably 110 to 140 parts by weight, based on 100 parts by weight of the mixing water, and if used in less than 90 parts by weight. If this happens, it may be difficult to secure early strength, and if it exceeds 150 parts by weight, there may be concerns about increased unit cost and increased shrinkage. There is no particular limitation on the material used for the cement.

The filler may be characterized as being any one of the group consisting of one or a combination of two or more selected from the group consisting of silica sand, fly ash, and gypsum, and may be used in an amount of 90 to 300 parts by weight, preferably 90 to 300 parts by weight, based on 100 parts by weight of the mixing water. It is used within the range of 100 to 250 parts by weight, more preferably 150 to 250 parts by weight. If used in less than 90 parts by weight, it may be difficult to secure early strength, and if it exceeds 300 parts by weight, there are concerns of increased unit cost and reduced miscibility. may occur.

The fibers can play a role in suppressing the occurrence of cracks and reducing strain by crosslinking the internal composite fibers. The fiber may be characterized as being any one of the group consisting of one or a combination of two or more selected from the group consisting of tensile PVA fiber, high tensile PE fiber, and high tensile steel fiber, and is present in an amount of 5 to 20 parts by weight based on 100 parts by weight of the number of blends. parts, more preferably 10 to 20 parts by weight, and even more preferably 10 to 15 parts by weight. If used in less than 5 parts by weight, the toughness of the composite decreases, making crack control difficult, and exceeding 20 parts by weight. If used, the durability performance is reduced due to the fiberball inside, and the strength is significantly reduced.

Next, the seismic reinforcement method according to the present invention will be described.

Figure 10 is a flowchart explaining the seismic reinforcement method according to the present invention.

As shown, the seismic reinforcement method according to the present invention is a construction method performed outside the building to be strengthened, and includes the steps of installing the chemical anchor 20, the step of installing the bonding device 30, and the first mortar ( It includes the steps of applying 40a), installing the mesh 50, and applying the second mortar 40b.

In more detail, holes are drilled in the horizontal direction outside the upper beam (Oa) and the lower beam (Ob) and the chemical anchors 20 are installed. The holes are drilled at regular intervals outside the upper beam (Oa) and the lower beam (Ob), and after installing the drilled chemical anchor (20), epoxy is injected into the hole where the chemical anchor (20) is installed. Fix the chemical anchor (20) more firmly.

Additionally, the joining device 30 is installed on the reinforced surface through the chemical anchor 20. In more detail, in the L-shaped cross section of the joining device 30, one surface on which the bolt 32 is mounted is brought into close contact with the reinforcing surface 10, and at this time, the through hole 31 formed in the joining device 30 is The chemical anchor is inserted while mounted on the wall. And as the nut 21 is fastened to the chemical anchor, the joining device 30 is pressed and fixed to the chemical anchor.

In particular, as shown in Figures 1 and 3, when the chemical anchor 20 is installed on the edge beam of a building, the joining device 30 can be installed in contact with the chemical anchors mounted in parallel in the horizontal direction. That is, in the L-shaped cross section of the joining device 30, the other surfaces perpendicular to the reinforcing surface 10 can be arranged to face each other. At this time, the other surfaces of the joining devices 30 that are in contact with each other may be bound to each other by bolts.

And the first mortar 40a includes a plurality of the chemical anchors 20 and joining devices 30 installed outside the upper beam Oa and the lower beam Ob. (Ob) is applied to the reinforcing surface 10 made of a masonry wall (W) disposed between the surface and the upper beam (Oa) and the lower beam (Ob). In particular, in the case of construction on the exterior of a building for a building edge beam, it can be widely applied using the exterior wall surface to be reinforced as the reinforcement surface.

This first mortar 40a is applied to the reinforcing surface 10 to a thickness of 10 to 30 mm, more preferably 10 to 25 mm, and even more preferably 15 to 20 mm.

After applying the first mortar 40a, the stress transfer device 70 is installed in the masonry. In this embodiment, the stress transfer device 70 is made of a knife block and a triangular piece, and the force transfer device is installed at intervals of 400 mm up, down, left and right.

In this state, the mesh 50 is placed and installed on the reinforcing surface. In more detail, the mesh 50 is inserted at both ends into the chemical anchor 20 and the bolt 32 inside the first mortar 40a. When installing and reinforcing the edge beam as shown in FIGS. 1 and 2, the net body 50 may be installed separately with the other surface of the joining device 30 as a boundary. And the inserted net body 50 is fixed by the bolt 32 and the connecting pin 60. Additionally, a connecting pin 60 is mounted on the triangular piece of the stress transfer device to limit the position of the mesh so that it does not arbitrarily protrude forward.

The connection pin 60 is fastened to the bolt 32 and the stress transfer device 70 on the outside of the mesh 50. The bolt 32 is entered into the entry part 61 with an expanded entrance, thereby creating a fastening space. When the bolt 32 is placed in the formed fastening part 62, the entry part 61 is closed and the connecting pin 60 fixes the net body in that position. At this time, since threads are formed on the body of the bolt 32, the connection pin 60 is prevented from moving along the body of the bolt 32 by the threads.

Then, the second mortar 40b is applied to the solidified outer surface of the first mortar 40a while the mesh 50 and the joining device 30 are buried and hardened. The second mortar (40b) is 10 to 30 mm on the reinforcing surface (10) where the first mortar (40a) is solidified with the mesh (50), joining device (30), and stress transfer device (70) buried. More preferably, it is applied to a thickness of 10 to 25 mm, even more preferably 15 to 25 mm.

As above, the rights of the present invention are not limited to the embodiments described above but are defined by the claims, and various modifications and modifications can be made by those skilled in the art within the scope of the rights set forth in the claims. It is self-evident that you can do this.

10: Reinforcement side
20: Chemical anchor 21: Nut
30: joining device 31: through hole 32: bolt
40a, 40b: 1st and 2nd mortar
50: net body
60: Connecting pin 61: Entry part 62: Fastening part
70: Stress transmission member
Oa: upper beam Ob: lower beam
W: masonry wall

Claims (8)

After drilling in the horizontal direction from the outside of the reinforcement surface (10) consisting of the upper beam (Oa), the lower beam (Ob), and the masonry wall (W) disposed between the upper beam (0a) and the lower beam (0b), chemical Installing the anchor 20;
The chemical anchor 20 is inserted into the hole 31 of the joining device 30, which has an L-shaped cross-section and has a hole 31 formed on each side, and a bolt 32 is installed on one side to stand upright, thereby forming a nut 21. tightly mounting the joining device 30 to the reinforcing surface 10 by fastening;
Applying a first mortar (40a) to the reinforcing surface (10) including the plurality of chemical anchors (20) and bonding devices (30) installed outside the reinforcing surface (10);
Installing a net body 50 composed of a mesh-shaped plane so that both ends are inserted into the chemical anchor 20 and the bolt 32 inside the first mortar 40a;
Mounting a connection pin (60) that is longer than the mesh of the net to the bolt (32) passing through the net to prevent the net from being separated from the bolt (32); and
A step of applying a second mortar (40b) to the solidified outer surface of the first mortar (40a) in a state in which the net body (50) and the joining device (30) are buried.
The connecting pin 60 is formed by bending the central portion so that both ends come into contact with each other. At both ends, an entry portion 61 is formed that expands to facilitate entry of the bolt 32. The entry portion 61 is formed between the central portion and both ends. ) is closed and is provided with a fastening part 62 that forms a fastening space by bending so that the bolt 32 inserted into the entry part 61 is seated,
In the step of mounting the joining device, the other surfaces perpendicular to the reinforcing surface 10 in the L-shaped cross section of the joining device 30 are arranged to face each other,
The joining device 30 supports the sides of the first mortar 40a and the second mortar 40b, on which the mesh 50 is reinforced, and connects the mesh 50, the first mortar 40a, and the A seismic reinforcement method for a masonry wall with improved constructability, characterized by integrated behavior with the second mortar (40b).
delete According to paragraph 1,
A seismic reinforcement method for a masonry wall with improved constructability, characterized in that the length of the joint device 30 is within a range of 4 to 7 times the length of one side of the L-shaped cross section.
Each of the plurality of holes drilled from the outside of the reinforcing surface 10 consisting of the upper beam (Oa), the lower beam (Ob), and the masonry wall (W) disposed between the upper beam (0a) and the lower beam (0b) Chemical anchor (20) installed;
A joining device that has an L-shaped cross-section and has holes 31 formed on each side. A bolt 32 is installed upright on one side, and the chemical anchor is inserted into the hole 31 and mounted on the reinforcing surface 10. (30);
A nut (21) mounted on the chemical anchor (20) while tightly pressing the joining device (30) to the reinforcing surface (10);
A first mortar (40a) applied to the reinforcing surface (10), including a plurality of chemical anchors (20) and a bonding device (30) installed on the reinforcing surface (10);
Inside the first mortar (40a), the chemical anchor (20) and the bolt (32) of the joining device (30) are installed through both ends, and the net body (50) is composed of a mesh-shaped plane;
A connection pin 60 configured to be longer than the mesh of the mesh to prevent the mesh 50 into which the bolt 32 of the joining device 30 is inserted and mounted on the bolt 32 to support the mesh; and
A second mortar (40b) applied to the solidified outer surface of the first mortar (40a) in a state in which the net body (50) and the joining device (30) are buried,
The connecting pin 60 is formed by bending the central portion so that both ends come into contact with each other. At both ends, an entry portion 61 is formed that expands to facilitate entry of the bolt 32. The entry portion 61 is formed between the central portion and both ends. ) is closed and is provided with a fastening part 62 that forms a fastening space by bending so that the bolt 32 inserted into the entry part 61 is seated,
The joining device 30 is arranged so that the other surfaces perpendicular to the reinforcing surface 10 face each other in the L-shaped cross section of the joining device 30,
The joining device 30 supports the sides of the first mortar 40a and the second mortar 40b, on which the mesh 50 is reinforced, and connects the mesh 50, the first mortar 40a, and the A seismic reinforcement structure of a masonry wall with improved constructability, characterized by integrated behavior with the second mortar (40b).
delete delete According to clause 4,
A seismic reinforcement structure of a masonry wall with improved constructability, characterized in that the length of the joint device (30) is within a range of 4 to 7 times the length of one side of the L-shaped cross section.
According to clause 4,
A seismic reinforcement structure of a masonry wall with improved constructability, characterized in that it is mounted perpendicular to the masonry wall and the connection pin 60 is fastened to the tip exposed through the mesh to limit the position of the mesh. .

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