KR20220049810A - Seismic retrofit structure of masonry buildings - Google Patents

Abstract

The present invention relates to a seismic retrofit structure of a masonry building, in which a corner reinforcing member is vertically installed on the outside of a corner of a masonry wall of a masonry building, so that the retrofitting is economically performed at low cost during residence, and excellent constructability, shortening of the construction period, and efficient resistance against lateral forces can be achieved. The seismic retrofit structure of a masonry building of the present invention is to reinforce the earthquake-resistance of an aged existing masonry building and includes the corner reinforcing member that is vertically fixed and installed on the outside of a corner of a masonry wall of the masonry building to support the corner portion of the masonry building.

Description

Seismic retrofit structure of masonry buildings

The present invention is a masonry building capable of efficiently resisting lateral forces as well as economical, excellent workability, shortening of construction period, as well as the effect of reducing the construction period by installing corner reinforcement members in the vertical direction on the outside of the corner of the masonry wall of the masonry building, so that it can be reinforced in the living state at low cost It is about the seismic reinforcement structure.

According to a 2015 report by the Research Center for Structural Safety Improvement Technology, there are about 3 million small-scale masonry buildings in Korea, of which 1.43 million are aged over 30 years.

These small-scale masonry buildings are not usually based on structural design by structural experts, and structural stability is concerned due to frequent expansion and remodeling. As a result of the actual experiment, the shear stress performance of the masonry was only around 0.1 MPa, so it was confirmed that the resistance to lateral force was extremely weak.

Accordingly, various technologies have been developed for seismic reinforcement of aging small-scale masonry buildings.

For example, the RC reinforcement method has excellent reinforcement performance and is advantageous in securing integrity with the masonry structure. However, reinforcing reinforcement and formwork installation process are required, workability is poor due to wet construction, and it takes a lot of time for concrete curing, which causes great inconvenience to residents.

And unlike the laboratory conditions, the reinforcement plate attachment method of attaching FRP or steel plate to the outside of a masonry wall may cause the reinforcement plate to fall off due to deterioration of the wall surface and heterogeneity of material when applied to an actual masonry building. In addition, the difficulty of construction is high, and the field applicability is poor.

In addition, there are fiber reinforcement method, honeycomb seismic reinforcement method, and metal lath + steel plate reinforcement method. However, this existing reinforcement method corresponds to a method of removing the masonry stucco and directly reinforcing the inner wall of the stucco, and there is a cumbersome need to remove all the chimney bricks.

In addition, these conventional construction methods require a lot of construction cost, so there is a limit to full application to an aging small-scale masonry building, and there is a problem in that the use of the building is limited during construction, which causes relocation costs, and thus affects the inconvenience of residents.

KR 10-1904204 B1

In order to solve the above problems, the present invention is to provide a seismic reinforcing structure of a masonry building that is economical and can minimize the impact on the occupants by being able to reinforce it in a living state at a low cost.

An object of the present invention is to provide a seismic reinforcing structure of a masonry building with short air and easy construction.

The present invention according to a preferred embodiment is for seismic reinforcement of an aging existing masonry building, which is fixedly installed on the outside of the corner of the masonry wall of the masonry building in the vertical direction to support the corner of the masonry building It is configured to include a corner reinforcement member It provides a seismic reinforcing structure of a masonry building, characterized in that it is

In the present invention according to another preferred embodiment, some bricks are removed from the end of the masonry wall where the corner reinforcement member is installed, and the space from which the bricks are removed is filled with a cast-in-place filling material. to provide.

The present invention according to another preferred embodiment provides an earthquake-resistant reinforcement structure of a masonry building, characterized in that the corner reinforcement member is a precast member.

In the present invention according to another preferred embodiment, the corner reinforcing member is fixed to the horizontal member at the upper and lower parts of the masonry wall on one side and the other side is fixed to the masonry wall by a fixing angle fixed to the corner reinforcing member. Seismic reinforcement of a masonry building provide structure.

In the present invention according to another preferred embodiment, the corner reinforcing member is a front panel that is in close contact with the front masonry wall of the corner of the masonry building, and a side panel that is formed in a direction orthogonal to one end of the front panel and is in close contact with the corner side masonry wall of the masonry building. It provides an earthquake-resistant reinforcement structure of a masonry building, characterized in that it is configured.

The present invention according to another preferred embodiment provides an earthquake-resistant reinforcing structure of a masonry building, characterized in that a wing wall extending from the front panel is provided at an outer end of the front panel.

The present invention according to another preferred embodiment provides an earthquake-resistant reinforcing structure of a masonry building, wherein the corner reinforcing member is composed of a plurality of unit reinforcing materials segmented vertically.

The present invention according to another preferred embodiment is that the shear key or shear key groove is formed on the surface where the unit reinforcement is joined to the vertical adjacent unit reinforcement, and is configured to engage with the shear key groove or shear key formed on the bonding surface of the other unit reinforcement. It provides a seismic reinforcing structure of a masonry building, characterized in that it is

The present invention according to another preferred embodiment provides a seismic reinforcement structure of a masonry building, characterized in that a shear key groove is formed on a surface where the unit reinforcement material is joined to an adjacent unit reinforcement material up and down, and a filler is filled in the shear key groove do.

The present invention according to another preferred embodiment provides an earthquake-resistant reinforcement structure of a masonry building, characterized in that one end is penetrated and fixed in the masonry wall, and the other end is further provided with an anchor bolt that protrudes into the interior of the shear keyway and is embedded in the filler material. do.

The present invention according to another preferred embodiment is a seismic reinforcement structure of a masonry building, characterized in that between the corner reinforcement members installed on both sides of the masonry wall, a connecting member for supporting the front panel side of the corner reinforcement member is mutually provided. provides

The present invention according to another preferred embodiment provides an earthquake-resistant reinforcement structure of a masonry building, wherein the corner reinforcing member is a cast-in-place member and is integrally formed with the cast-in-place fill material.

According to the present invention, by installing corner reinforcement members in the vertical direction outside the corners of the masonry wall of an aged masonry building to support the corners of the building, both corner reinforcement members and the internal masonry wall form an integrated structure to effectively resist lateral forces. It is possible to provide a seismic reinforcing structure of a masonry building that can

Accordingly, it is possible to obtain the effect of being economical, short-lived, and excellent in constructability because it can be reinforced in the living state at a low cost by minimizing the removal of the masonry wall.

1 is a perspective view showing the earthquake-resistant reinforcement structure of the present invention masonry building.
Fig. 2 is a perspective view showing a state in which bricks are removed from a corner part of a masonry wall;
3 is a perspective view showing a state in which the cast-in-place filling material is filled in the corner part of the masonry wall;
4 is a cross-sectional view showing a coupling relationship of a corner reinforcing member;
5 is a perspective view showing embodiments of a corner reinforcing member;
6 is a perspective view showing an embodiment of the unit reinforcement.
7 is a perspective view illustrating an installation state of a corner reinforcing member made of a plurality of unit reinforcing materials.
8 is a perspective view showing the coupling state of the unit reinforcement by the shear keyway and the filler.
9 is a perspective view showing the installation state of the unit reinforcement fixed by the anchor bolt.
10 is a plan sectional view showing the installation state of the unit reinforcement fixed by the anchor bolt.
11 is a perspective view showing a corner reinforcing member connected by a connecting member.
Figure 12 is a plan cross-sectional view showing the installation state of the connecting member provided with a turnbuckle.
13 is a perspective view showing a corner reinforcing member that is a cast-in-place member.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.

1 is a perspective view illustrating an earthquake-resistant reinforcement structure of a masonry building according to the present invention.

As shown in FIG. 1, the earthquake-resistant reinforcement structure of the masonry building of the present invention is for earthquake-resistant reinforcement of an aging existing masonry building. It is characterized in that it is configured to include a corner reinforcement member (2) for supporting the part.

An object of the present invention is to provide an earthquake-resistant reinforcement structure for a masonry building that is economical, short-lived, and easy to construct because it can be reinforced in a living state at a low cost.

The seismic reinforcing structure of the masonry building of the present invention is configured to include a corner reinforcing member (2).

The corner reinforcing member 2 is a vertical member disposed in a vertical direction on the outside of the masonry building.

The corner reinforcing member 2 is fixedly installed outside the corner of the masonry wall 1 of the masonry building to support the corner of the masonry building.

The corner reinforcing member 2 is respectively coupled to both sides of the masonry wall 1 to resist lateral force.

Since the masonry wall 1 is filled between the corner reinforcing members 2 on both sides, the corner reinforcing members 2 on both sides and the inner masonry wall 1 form an integrated structure to effectively resist lateral force.

In addition, the present invention can minimize the removal of the masonry wall (1) by installing the corner reinforcing members (2) at both corners of the masonry wall (1) outside the masonry building. In addition, there is little impact on the lives of residents during construction, so it is possible to work while living.

The corner reinforcing member 2 may be made of fiber-reinforced mortar (FRM) or fiber-reinforced concrete (FRC).

The FRM or FRC has high tensile strength, shear strength, and ductility, so that the corner reinforcing member 2 can be reduced in weight.

2 is a perspective view showing a state in which bricks are removed from the corner of the masonry wall, and FIG. 3 is a perspective view showing a state in which the cast-in-place filler is filled in the corner of the masonry wall.

2 and 3, some bricks are removed from the end of the masonry wall 1 where the corner reinforcement member 2 is installed, and the cast-in-place filler 3 can be filled in the space from which the bricks are removed. there is.

If some bricks are removed from the corner where the masonry wall (1) of the front of the building and the masonry wall (1) on the side meet and are filled with cast-in-place fill material (3), the front masonry wall (1) and the side masonry wall (1) can be fixed at the same time . In addition, the masonry wall (1) and the corner reinforcing member (2) can be firmly integrated.

The cast-in-place filler (3) may be concrete, non-shrinkage mortar, fiber-reinforced mortar, fiber-reinforced concrete, and the like.

The corner reinforcing member 2 may be formed of a precast member.

When the corner reinforcing member 2 is formed of a factory-manufactured precast member, the on-site construction time can be minimized and thus residents' inconvenience can be greatly reduced.

4 is a cross-sectional view showing the coupling relationship of the corner reinforcing member.

4, the corner reinforcing member 2 has one side fixed to the horizontal member 100 at the upper and lower parts of the masonry wall 1, and the other side is fixed to the corner reinforcing member 2 at a fixed angle 4 It can be fixed to the masonry wall (1) by

The corner reinforcing member 2 may be fixed to the upper and lower horizontal members 100 instead of the masonry wall 1 in order to minimize damage to the existing masonry wall 1 .

Here, the horizontal member 100 is a slab, a beam, a foundation, and the like.

After positioning the fixing angles 4 at the point where the corner reinforcing member 2 and the upper and lower horizontal members 100 meet, both legs of the fixing angle 4 are attached to the horizontal member 100 and the corner reinforcing member 2, respectively. Each can be fixed with anchor bolts, etc., in close contact.

5 is a perspective view illustrating embodiments of a corner reinforcing member.

As shown in (a) and (b) of Figure 5, the corner reinforcing member 2 is a front panel 21 and one end of the front panel 21 that are in close contact with the front masonry wall 1 of the corner of the masonry building. It is formed in a direction perpendicular to the masonry building can be composed of a side panel 22 that is in close contact with the side masonry wall (1) of the masonry building.

As shown in (a) of FIG. 5 , the corner reinforcement member 2 may be configured to surround the corner of the masonry building by forming the front panel 21 and the side panel 22 in a L shape.

Accordingly, the corner reinforcing member 2 can be configured with a pair of orthogonal panels 21 and 22 having a relatively thin thickness, and the portion in which the existing masonry building protrudes to the outside can be minimized due to the reinforcement.

In addition, bi-directional reinforcement is possible in the longitudinal direction as well as in the transverse direction by the L-shaped corner reinforcement member (2).

The L-shaped corner reinforcing member 2 is self-supporting, so it is easy to construct.

As shown in (b) of FIG. 5 , a wing wall 23 extending from the front panel 21 may be provided at an outer end of the front panel 21 .

In order to increase resistance to lateral force, the front panel 21 of the corner reinforcing member 2 that is in close contact with the front masonry wall 1 may be extended to the outside to form the corner reinforcing member 2 as a whole in a T-shaped cross-sectional shape.

When the wing wall 23 is formed on the side end of the front panel 21, there is no additionally protruding part from the front of the masonry building.

6 is a perspective view illustrating an embodiment of a unit reinforcement, and FIG. 7 is a perspective view illustrating an installation state of a corner reinforcement made of a plurality of unit reinforcements.

6 and 7, the corner reinforcing member 2 may be composed of a plurality of unit reinforcing materials 20 segmented vertically.

When the corner reinforcing member 2 is formed of a precast member, it may be difficult to transport or lift on-site due to the large weight of the member.

Therefore, the corner reinforcing member 2 may be divided into a plurality of unit reinforcing materials 20 to facilitate transport and installation.

6 and 7, the shear key 24 or shear key groove 25 is formed on the surface where the unit reinforcement 20 is joined to the unit reinforcement 20 adjacent up and down, and the other side unit reinforcement ( 20) may be configured to engage with the shear key groove 25 or the shear key 24 formed on the bonding surface.

The corner reinforcing member 2 resists lateral force by shear force.

Therefore, the shear key 24 and the shear key groove 25 are formed at the junction between the up and down neighboring unit reinforcement 20 so that the mutually segmented unit reinforcement 20 can act integrally with respect to the lateral force. It can be configured to engage with each other. .

As described above, the corner reinforcing member 2 is composed of the front panel 21 and the side panel 22 orthogonal thereto to form a L-shaped or T-shaped cross section. Therefore, the shear key 24 and the shear key groove 25 are also formed on the front panel 21 and the side panel 22, respectively, so that they are formed in both directions.

Accordingly, it is possible to move integrally by the two-way shear key 24 in both the transverse direction and the longitudinal direction in plan view.

8 is a perspective view showing the coupling state of the unit reinforcement by the shear keyway and the filler.

As shown in FIG. 8, a shear key groove 25 is formed on the surface where the unit reinforcement 20 is joined with the unit reinforcement 20 adjacent up and down, and a filler 26 is formed in the shear key groove 25. It can be configured to be filled.

The corner reinforcing member 2 can be formed in a L-shape or T-shape in cross section, and a shear key 24 and a shear key groove 25 are formed on each joint surface of the upper and lower corner reinforcing members 2 to engage with each other. In this case, since the shear key 24 and the shear key groove 25 must be accurately engaged in two directions orthogonal to each other, construction may be somewhat difficult.

Therefore, all shear key grooves 25 are formed on the joint surface of the unit reinforcement 20 so as to absorb construction errors and manufacturing errors of the unit reinforcement 20, but the shear key groove 25 is filled with a filler 26 and a shear key (24) It can be configured to play a role.

In this case, the upper and lower unit reinforcing materials 20 do not protrude up and down, so construction is easy.

The filler 26 may be composed of fiber-reinforced mortar.

9 is a perspective view showing the installation state of the unit reinforcement fixed by the anchor bolt, Figure 10 is a plan sectional view showing the installation state of the unit reinforcement fixed by the anchor bolt.

As shown in FIGS. 9 and 10 , one end is penetrated and fixed in the masonry wall 1 , and the other end protrudes into the shear key groove 25 and the anchor bolt 5 is embedded in the filler 26 . can be provided.

The corner reinforcing member 2 can be fixed to the masonry wall 1 by using the filler 26 filled in the shear key groove 25 in order to integrate the upper and lower unit reinforcing materials 20 with each other.

To this end, an anchor hole is drilled in the masonry wall (1) and one end of the anchor bolt (5) is inserted and fixed. And after the other end of the anchor bolt (5) is protruded into the shear key groove (25), the filler 26 is filled in the shear key groove (25) to fix the other end of the anchor bolt (5).

At this time, a stepped portion 251 may be formed on the inside of the shear key groove 25 so that the unit reinforcing material 20 and the filler 26 can be firmly engaged and fixed (FIG. 10).

11 is a perspective view showing a corner reinforcing member connected by a connecting member, and FIG. 12 is a plan sectional view showing an installation state of the connecting member provided with a turnbuckle.

11 and 12, between the corner reinforcing members 2 installed on both sides of the masonry wall 1, a connecting member supporting the front panel 21 of the corner reinforcing member 2 by interconnecting it (6) may be further provided.

The corner reinforcing members 2 on both sides of the masonry wall 1 can be connected with the connecting member 6 so that the masonry wall 1 does not expand when a lateral force is applied and behaves integrally to resist lateral force.

The connecting member 6 is configured to be adjustable in length, and by pulling the corner reinforcing members 2 on both sides, it can be configured to constrain the internal masonry wall 1 .

As shown in FIG. 12 , the connecting member 6 may be configured by coupling the connecting cable 62 to both ends of the turnbuckle 61 .

13 is a perspective view illustrating a corner reinforcing member that is a cast-in-place member.

As shown in FIG. 13 , the corner reinforcing member 2 may be integrally formed with the cast-in-place filler 3 as a cast-in-place member.

The corner reinforcing member 2 may be formed by a wet process in some cases.

At this time, in order to integrate the corner reinforcing member 2 with the masonry wall 1, some bricks at the end of the masonry wall 1 are removed, and the space between the removed bricks and the space where the corner reinforcing member 2 is to be formed is filled with cast-in-place filling material. (3) can be filled at the same time to form the corner reinforcing member (2).

To this end, it can be completed by constructing a formwork or FRM panel at the position of the corner reinforcement member (2), and pouring concrete or the like therein.

In this case, since the cast-in-place fill material 3 engaged with the bricks of the masonry wall also resists the lateral force, the cross-sectional size of the corner reinforcing member 2 can be minimized.

In the inside of the corner reinforcing member (2), a main bar and a band reinforcing bar are reinforced.

The corner reinforcing member 2 not only resists lateral force but also serves to firmly fix the masonry wall 1 .

1: masonry wall
100: horizontal member
2: Corner reinforcement member
20: unit reinforcement
21: front panel
22: side panel
23: wing wall
24: shear key
25: shear keyway
251: stepped portion
26: filling material
3: Cast-in-place fill material
4: Fixed angle
5: Anchor bolt
6: Connection member
61: turnbuckle
62: connection cable

Claims (12)

This is to reinforce the earthquake resistance of the aging existing masonry building.
The seismic reinforcement structure of a masonry building, characterized in that it comprises a corner reinforcement member (2) that is vertically fixed to the outside of the edge of the masonry wall (1) of the masonry building and supports the corner of the masonry building.
In claim 1,
An earthquake-resistant reinforcement structure of a masonry building, characterized in that some bricks are removed from the end of the masonry wall (1) where the corner reinforcement member (2) is installed, and a cast-in-place filler (3) is filled in the space from which the bricks are removed.
In claim 1,
The corner reinforcement member (2) is an earthquake-resistant reinforcement structure of a masonry building, characterized in that it is a precast member.
In claim 3,
The corner reinforcing member 2 is fixed to the horizontal member 100 at the upper and lower portions of the masonry wall 1 on one side, and the other side is fixed to the masonry wall 1 by a fixing angle 4 fixed to the corner reinforcing member 2 Seismic reinforcement structure of a masonry building, characterized in that.
In claim 3,
The corner reinforcing member 2 is formed in a direction perpendicular to one end of the front panel 21 and the front panel 21 in close contact with the front masonry wall 1 of the corner of the masonry building, and the corner side masonry wall 1 of the masonry building. Seismic reinforcement structure of a masonry building, characterized in that it is composed of a side panel (22) in close contact with the.
In claim 5,
An earthquake-resistant reinforcement structure of a masonry building, characterized in that the outer end of the front panel (21) is provided with a wing wall (23) extending from the front panel (21).
In claim 3,
The corner reinforcement member (2) is an earthquake-resistant reinforcement structure of a masonry building, characterized in that it is composed of a plurality of unit reinforcement (20) segmented up and down.
In claim 7,
A shear key 24 or a shear key groove 25 is formed on the surface where the unit reinforcement 20 is joined to the unit reinforcement 20 adjacent up and down, and a shear key groove 25 formed on the bonding surface of the unit reinforcement 20 on the other side. ) or a seismic reinforcement structure of a masonry building, characterized in that it is configured to engage with the shear key 24.
In claim 7,
A shear key groove 25 is formed on the surface where the unit reinforcement 20 is joined to the unit reinforcement 20 adjacent up and down, and the shear key groove 25 is filled with a filler 26. of seismic reinforcement structure.
In claim 9,
Seismic reinforcement of a masonry building, characterized in that one end is penetrated and fixed in the masonry wall (1), and the other end is further provided with an anchor bolt (5) which protrudes into the inside of the shear keyway (25) and is embedded in the filler (26). rescue.
In claim 5,
Between the corner reinforcing members (2) installed on both sides of the masonry wall (1), a connecting member (6) for interconnecting and supporting the front panel (21) side of the corner reinforcing member (2) is further provided, characterized in that Seismic reinforcement structure of masonry building.
In claim 2,
The corner reinforcing member (2) is a cast-in-place member and is an earthquake-resistant reinforcement structure of a masonry building, characterized in that it is integrally formed with the cast-in-place fill material (3).

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