KR101341170B1 - Reinforcing structure for masonry wall, and the method thereof - Google Patents

Abstract

The present invention relates to a wedge-type seismic reinforcement structure for masonry walls and a seismic reinforcement method using the same.A non-structural member which prevents human injury from being caused by falling and falling of a masonry partition wall sandwiched between existing main structural parts during an earthquake. The seismic reinforcement method was developed and the other prerequisites were economical, environmental, aesthetic and constructive considerations. The demolition of school classrooms was minimized so that there was no change in student class environment. The dry construction method enables construction during the winter vacation, and it is intended to easily use PC strands with weak bending properties as tensioning materials.
The wedge-type seismic reinforcement structure for the masonry wall according to the present invention is disposed vertically or horizontally on one or more surfaces of the masonry masonry wall 3 partitioning the interior space of the concrete building, and both ends of the longitudinal direction are fixed through the fixing means. At least one tension member (10) fixed to the building or the brick masonry wall (3); It is formed in a plate shape and is fixed while interviewing the brick masonry wall includes a reinforcement plate 20 for supporting the brick masonry wall, the fixing means is installed on at least one side of the ceiling and the bottom of the building and the nut is fastened The chemical anchor 30, characterized in that it comprises a coupler anchorage 40 is fastened to the chemical anchor and the tension member is connected to the wedge. The coupler fixing means is provided with an anchor hole and a bolt hole through which the chemical anchor is penetrated and fixed to the nut to bolt-couple the plate-shaped coupler anchorage to fix the tension member, and a bolt hole of the coupler anchorage, and a wedge hole therein. The coupler housing includes a tapered wedge coupler mounted in the wedge hole of the coupler housing and having the tension member fixed therein.

Description

Wedge type seismic reinforcement structure for masonry wall and seismic reinforcement method using same {REINFORCING STRUCTURE FOR MASONRY WALL, AND THE METHOD THEREOF}

The present invention relates to a wedge-type seismic reinforcement structure for masonry walls, and a seismic reinforcement method using the same. More specifically, a wall of a brick by masonry is prevented from collapse by a horizontal shear force when an earthquake occurs. The present invention relates to a wedge-type seismic reinforcing structure for a masonry wall that can be easily installed using the same, and a seismic reinforcing method using the same.

In accordance with Article 14 of the Earthquake Disaster Countermeasures Act, seismic reinforcement of existing schools in Korea is being promoted. Currently applied methods are aimed at stabilizing facilities through reinforcement of major structural units and preventing human life damage by preventing collapse in the event of an earthquake.

However, according to the investigation of the causes of casualties in the earthquake, the secondary damage (60%) due to the destruction of non-structural members is greater than the direct damage (40%) due to the collapse of the building. Therefore, it can be said that substantial seismic reinforcement is achieved only when the seismic performance of the main structural members is improved and the reinforcement of the non-structural members is performed together.

In the existing school facility with reinforced concrete structure, the partition wall between the classroom and the classroom on the short side is piled with brick, which is sandwiched in the four-side concrete structure, and the shear force due to the horizontal force is very weak due to the characteristics of the masonry wall. In particular, the area where the upper concrete beam is in contact with the brick is placed without adhesive mortar or empty space, and most of them have a cause that can cause human damage due to collapse and fall when an earthquake occurs.

Therefore, it is urgent to develop a reinforcement method for this.

According to the earthquake damage performance level, the safety safety performance level of the building causes damage to important structural and non-structural parts, the bending stiffness of the major structural parts is damaged, but the collapse capacity remains, and the non-structural members are seriously damaged. (Refer to page 15 of the Seismic Design Standard Notice for School Facilities), and even though there is a risk of human injury, the current seismic reinforcement project is required to strengthen seismic reinforcement to prevent collapse. However, non-structural members are included only as a recommendation in the scope of seismic reinforcement (Ministry of Education, Science and Technology Notice 2009-13: Notice of Seismic Design Standard for School Facilities, Chapter 7 2009.4.30).

In addition, the seismic reinforcement method currently developed has only the structural reinforcement method of the main structural part, and the seismic reinforcement method for the non-structural members has not been developed.

In response, the Earthquake Disaster Prevention Act is promoting earthquake-resistant reinforcement projects of existing schools, which are important facilities for national disaster preparedness.

However, the current seismic reinforcement is focused only on the reinforcement of major structures to prevent building collapse, and the seismic reinforcement on non-main structures is not progressed. Therefore, it does not meet the actual purpose of disaster preparedness policy.

The conventional seismic reinforcement method for the non-structural member has a method of increasing the cross section of the existing wall, but the problem is as follows.

1. Increasing the cross-section increases the weight of the building.

2. It is difficult to complete construction during short vacation due to complicated construction.

3. Limited budget due to excessive construction costs.

As a result, the seismic reinforcement of the non-structural members is not achieved.

In order to solve this problem there is a Patent No. 10-1017686 (Anti-earthquake reinforcing structure for masonry wall and seismic reinforcement method using the same) patented by the present applicant.

Although the previous application has the effect of reinforcing the masonry wall during an earthquake through the tension member and the reinforcement plate, it did not provide an alternative to easily install the PC strand in the ceiling and the bottom of the structure when the tension member is used as the PC strand. .

And, the first application is the reinforcement plate is fixed to the wall through the anchor, the reinforcement plate may be damaged during anchoring of the anchor, the anchor is anchored at the back of the reinforcement plate that is not visible to the naked eye can be anchored at an acute angle There are disadvantages.

Patent Registration No. 1017686

The present invention is to solve the problems as described above, to develop a seismic reinforcement method for the non-structural member to prevent the damage caused by the fall of the masonry partition wall sandwiched between the existing concrete main structure when the earthquake occurs. Another precondition for this is economical, environmental, aesthetic and constructive considerations. The demolition part of the school classroom was minimized so that the construction period of students was not changed and the student's classroom environment was not changed. The purpose of the present invention is to provide a wedge-type seismic reinforcing structure for masonry walls that can be easily used, for example, having a weak bending property, and a seismic reinforcing method using the same.

Another object of the present invention is to fix the reinforcement plate to the masonry wall without causing damage to the reinforcement plate.

The wedge-type seismic reinforcement structure for masonry wall according to the present invention is disposed vertically or horizontally on at least one surface of a masonry masonry wall partitioning an interior space of a concrete building, and both ends of the longitudinal direction are secured through the fixing means. At least one tension member secured to the brick masonry wall; It is formed in a plate shape and is fixed while interviewing the brick masonry wall and includes a reinforcement plate for supporting the brick masonry wall, The fixing means is installed on at least one side of the ceiling and the bottom of the building, the chemical anchor with a nut fastened , Coupler fixing means is fastened to the chemical anchor and the tension member is connected to the wedge.

The coupler fixing means is provided with an anchor hole and a bolt hole through which the chemical anchor is penetrated and fixed to the nut to bolt-couple the plate-shaped coupler anchorage to fix the tension member, and a bolt hole of the coupler anchorage, and a wedge hole therein. Coupled housing provided, characterized in that it comprises a wedge-shaped coupler of the tapered shape is mounted in the wedge hole of the coupler housing and the tension member is fixed therein.

According to the wedge-type seismic reinforcement structure for masonry wall and seismic reinforcement method using the same, the masonry wall is the upper and lower beams of reinforced concrete structure due to the tension and reinforcement plate of the tension member based on the upper and lower parts of the reinforced concrete structure of the existing building. With the support of the government and the floor), it will not collapse even when an earthquake occurs, and even if the collapse occurs, it will prevent the bricks and debris from scattering and drastically reduce the casualties.In particular, the Earthquake Disaster Prevention Act and the National Disaster Preparedness Plan It can be usefully applied to seismic reinforcement of existing school facilities, as well as other buildings of similar structure.

In particular, it can improve the reliability as a seismic reinforcing structure because the PC strand can be used that is not easy to install due to the weak bending properties while having the optimum conditions as the tension material.

In addition, the hinge bolt is fixed to the masonry wall so that the reinforcing plate can be in close contact with the masonry wall so that the reinforcing plate can function and the hinge bolt can be checked visually when the hinge bolt is bolted. Can be installed in the location and installation work is very easy.

In addition, the seismic reinforcement structure is constructed on a part of the masonry wall, so the construction period is short, so it can be completed during the vacation period, and dry construction is also possible in winter. In particular, since the construction cost does not exceed 50% of the section expansion method, it can be easily applied in a given budget.

As a result, the reinforcement of the non-structural members is performed simultaneously with the reinforcement of the main structural units, and ultimately, the purpose of the seismic reinforcement project of the existing school facilities will be achieved.

1 is a perspective view of a wedge seismic reinforcement structure for masonry wall according to the present invention.
Figure 2 is a fixed state diagram of the wedge-type seismic reinforcement structure for the masonry wall according to the present invention.
Figure 3 is an exploded perspective view of the fixing means applied to the wedge seismic reinforcement structure for masonry wall according to the present invention.
4 to 7 are exploded views, enlarged views, exploded perspective views and enlarged cross-sectional views showing another example of the coupler fixing means applied to the wedge seismic reinforcement structure for masonry wall according to the present invention.
Figure 8 is a view showing a portion to which the wedge-type seismic reinforcement structure for masonry wall according to the present invention is applied.
9 is an exemplary view in which a wedge type seismic reinforcing structure for a masonry wall according to the present invention is installed on an outer wall.

As shown in Figures 1 and 2, the wedge-type seismic reinforcement structure 100 for masonry wall according to the present invention, a concrete building (hereinafter referred to as 'buildings'), for example, the interior space of the school into a number of classrooms It is to protect the masonry wall (hereinafter referred to as 'wall'), which is constructed by masonry construction, to protect it from earthquakes, and to prevent the wall from being destroyed even if a horizontal shear force is applied during the earthquake. Composed of a combination of and reinforcement plate is installed on one or more sides of the wall. The seismic reinforcement structure 100 may be installed in the vertical wall, the left and right horizontal direction, etc. in the masonry wall (3), hereinafter will be described taking an example installed in the vertical direction.

The tension member 10 is, for example, a PC strand, and both sides thereof are respectively fixed to upper and lower beams (ceiling part 1 and bottom part 2) of the building, and the ceiling part 1 and the floor part 2 are separated from the wall by tension. 3) Tension to the side so that the wall (3) is not only the masonry force between the bricks but also the support of the reinforced concrete structure ceiling (1) and the bottom (2) to strengthen the wall (3).

The reinforcement plate 20 is fixed to the wall 3 to prevent the destruction of the wall 3 and to prevent the fragments from scattering even if some destruction occurs.

Reinforcement plate 20 of this function is possible to use a variety of materials having a tension as a reinforced plastic, iron, carbon fiber, aramid fiber, glass fiber, etc., made of a size to fit the height of the wall (3), the wall ( Considering the height change and handling (storage, transportation, etc.) of 3), a plurality of unit boards may be connected. Since the connection structure of the plurality of unit plates can be made by a conventional plate connection method, a specific structure is omitted.

The tension member 10 and the reinforcement plate 20 may perform independent functions, but may be independently installed. However, the tension member 10 and the reinforcement plate 20 may be independently configured, for example, and the tension member 10 may be reinforced. It is fixed through the plate 20 and integrated. One or more tension members 10 may be installed in one reinforcing plate 20, preferably two are installed, and two are illustrated in the drawings and the following description.

The reinforcing plate 20 is formed with two holes penetrating up and down based on the installation state, and the tension member 10 is fixed after being penetrated through the holes so that both upper and lower sides protrude from the reinforcing plate 20, respectively.

The tension member 10 and the reinforcing plate 20 assembly are fixed through the fixing means. Specifically, the upper and lower portions of the tension member 10 are fixed through the fixing means.

The fixing means is characterized in that it is configured to be installed as it is without bending the tension member 10 according to the characteristics of the PC strand not bent, as shown in Figures 1 to 3, is installed on the bottom (2) nut A chemical anchor 30 to which the 31 is fastened, a coupler anchorage 40 fixed to the chemical anchor 30, and a wedge-shaped coupler 50 connecting the tension member 10 and the coupler anchorage 40.

The chemical anchor 30 has a screw thread formed on the outer circumferential surface thereof and is embedded in the bottom part 2 of the building, and fixes the tension member 10 to the bottom part 2 of the building through the coupler anchorage 40.

The coupler anchorage 40 is, for example, in the form of a flat block at the top and the bottom, and the anchor hole 41 and the tension member 10 fixed with the nut 31 through which the chemical anchor 30 penetrates and the reinforcement plate 20 are fixed. A tapered wedge hole 42 having a narrow cross-sectional area in the direction of) is provided.

The anchor hole 41 is preferably in the form of a long hole in view of the positional error of the chemical anchor 30 and the tension member 10.

The wedge hole 42 has the same taper shape as the wedge-shaped coupler 50 and guides the coupler 50 to be fixed in a wedge manner when the coupler anchorage 40 moves due to the tightening of the nut 31.

Since the coupler anchorage 40 is to tension the tension member 10 while moving toward the bottom portion 2 when the nut 31 is tightened, the coupler anchorage 40 is spaced apart from the bottom portion 2, and at this time, the elastic pad ( 43) may be intervened. The elastic pad 43 is made of an elastic material so as not to interfere with the movement of the coupler anchorage 40 while supporting the coupler anchorage 40.

The wedge-shaped coupler 50 is, for example, the tension member 10 is penetrated and fixed in the form of a tapered cone circumference, for example, a plurality (two or more) of the piece is made through the coupling ring. .

The wedge-shaped coupler 50 is made of a non-slip structure, for example, an uneven structure, so that the tension member 10 can be firmly bound without falling out.

In the above, the fixing means is illustrated and described as being applied only to the bottom 2 of the lower part, but the same may be applied to the ceiling of the upper part. Of course, the fixing means may be applied only to either side of the ceiling and the bottom portion, so the tension member 10 is fixed through a general anchor where the fixing means is not applied.

The present invention may be applied to the hinge bolt 60 to be fixed through the tension member 10 without fixing the reinforcing plate 20 to the wall.

The hinge bolt 60 has a tension member 10 fitted into the ring portion 61 to be fixed to the tension member 10, and the bolt portion 62 is inserted into and fixed to the wall.

Until now, the tension member 10 has been described as penetrating the reinforcing plate 20, but the tension member is divided into the upper and lower and the upper tension member and the lower tension member configured to be connected to the upper and lower, respectively, without penetrating the inside of the reinforcement plate. Can be done. The other upper and lower fixing means of the configuration is configured in the same manner as described above.

The wedge-type seismic reinforcement structure 100 for the masonry wall of such a configuration is a plurality of spaced apart or arranged in a line at a predetermined interval on the wall (3) can reinforce all parts of the wall (3), which Will be clarified through the reinforcement method.

Seismic reinforcement method using the wedge seismic reinforcement structure for masonry wall according to the present invention is as follows.

(S10) seismic reinforcement groove formation.

A plurality of seismic reinforcing grooves are formed at regular intervals on at least one surface of the wall (shown as formed on one surface in the drawing). The seismic reinforcement groove is a space for installing the wedge-type seismic reinforcement structure 100 for the masonry wall, and specifications and spacing may vary depending on the size of the seismic reinforcement structure 100 and the thickness of the wall, and the like. . In addition, the seismic reinforcement grooves are formed by cutting or the like for the wall 3 that is already built, but in the initial construction of the wall, the bricks are masoned to form the seismic reinforcement grooves.

The seismic reinforcement grooves are intended not to change the cross section of the wall, and in some cases, the seismic reinforcement grooves may not be formed, and the seismic reinforcement structure 100 may be installed to protrude from the surface of the wall.

(S20) Fixing means installation and reinforcement plate and tension assembly installation.

Fixing means is installed in order to install the assembly of the tension member 10 and the reinforcement plate 20 of the seismic reinforcement structure 100, and specifically, the lower chemical anchor 30 is installed on the bottom 2, respectively, and the tension member. The wedge-shaped coupler 50 is fixed to the end of the 10 and then the wedge-shaped coupler 50 is fixed to the wedge hole 42 of the coupler anchorage 40 to fix the tension member 10 and the coupler anchorage 40. Unite.

The chemical anchor 30 is inserted into the anchor hole 41 of the coupler mounting hole 40, and then the nut 31 is fastened to bind the chemical anchor 30 and the coupler fixing unit 40.

When the nut 31 is tightened, the tension member 10 is tensioned by moving the coupler anchorage 40 toward the bottom 2. When the elastic pad 43 is applied, the elastic pad 43 is disposed between the coupler anchorage 40 and the bottom portion 2 and elastically deforms the coupler anchorage 40 while being elastically deformed by a force applied from the coupler anchorage 40. Support so that the coupler anchorage 40 is not inclined by the force of the chemical anchor 30 and the tension member 10.

The ceiling of the tension member 10 is fixed in such a manner as to install the above-mentioned fixing means in the same manner or to install the general anchor in the ceiling, and to connect the tension member 10 to the anchor by fitting.

(S30) deadline.

When the installation of the seismic reinforcement structure 100 is completed, the wall is closed. The finish consists of adhesion-surface reinforcement-finish, specifically, an adhesive layer is formed by applying an adhesive on the surface of the wall and inside the seismic reinforcement groove, and a reinforcing layer is formed by applying a surface reinforcement including glass fibers on the surface of the adhesive layer. The outer finishing layer 230 is formed by applying a finishing material (such as refractory mortar) or attaching a wallpaper to the surface of the reinforcing layer. The reinforcing layer and the finishing layer are not limited to the above and are not essential, and may be completed by the installation of the seismic reinforcing structure 100, or may be finished only with paint or the like.

According to the wall constructed by the present invention, by the tension of the tension member 10 is firmly supported between the upper and lower reinforced concrete structures (ceiling and bottom 2) to prevent the shaking of the brick during an earthquake to collapse in response to the horizontal load In addition, the reinforcing plate 20 can prevent the wall from collapsing by absorbing the vibration of the wall, and can prevent the brick fragments from scattering even if the wall collapses.

Until now, the seismic reinforcement structure 100 has been described as being installed only up and down, but the seismic reinforcement structure 100 can be installed in the left and right and horizontal directions as well (the above-described upper and lower fixing means may be arranged on the left and right sides), In addition, it may be installed inclined according to the construction conditions.

The present invention can be easily applied to all similar buildings as well as existing school facilities.

4 to 7 show another example of the tension member fixing means applied to the present invention, the tension member is fixed through the following configuration.

The coupler anchorage 40 is provided with an anchor hole 41 through which the chemical anchor 30 penetrates and is fixed with a nut 31 as a plate, and has a bolt hole to which a coupler housing 51 to be described later is fastened.

The wedge-shaped coupler 50 is installed via a separate coupler housing 51 while the tension member 10 is inserted and fixed therein.

The coupler housing 51 is bolted to the coupler anchorage 40 while being provided with a wedge hole in which the wedge-shaped coupler 50 is mounted in a wedge fashion.

The coupler housing 51 penetrates through the bolt hole of the housing main body 52 and the coupler fixing unit 40 where the wedge-shaped coupler 50 is provided and the wedge-shaped coupler 50 is mounted to mount the wedge-shaped coupler 50. It is preferable to be configured to be separated into a bolt portion 53 which is fastened to the screw and fastened to the housing body 52.

The bolt portion 53 is formed with a support ring 53a on the opposite side of the nut 54 to be supported by the coupler anchorage 40. In the drawings, there are shown bolt portions having different diameters with respect to the support ring 53a, but the present invention is not limited thereto.

In addition, an elastic member (coil spring, etc.) 55 supports the wedge-shaped coupler 50 toward the wedge hole of the coupler housing 51 to install the tension member 10 more tightly inside the coupler housing 51. do.

8 and 9 illustrate an example in which the wedge-type seismic reinforcement structure 100 for masonry wall according to the present invention is applied, and as shown in FIG. 8, the wedge-type seismic reinforcement structure 100 for masonry wall according to the present invention. ) Is installed in various directions such as the ceiling and the wall in the longitudinal direction and the transverse direction, as shown in Figure 9, can be installed on the outer wall of the building.

1: ceiling, 2: bottom
3: wall,
10: tension member, 20: reinforcement plate
30: chemical anchor, 31: nut
40: coupler anchorage, 41: anchor hole
42: wedge hole, 43: elastic pad

Claims (4)

At least one tension member disposed vertically or horizontally on at least one surface of the brick masonry wall 3 partitioning the interior space of the concrete building, and both ends of the longitudinal direction are fixed to the concrete building or the brick masonry wall 3 through fixing means. 10;
It is formed in a plate shape and is fixed while interviewing the brick masonry wall includes a reinforcement plate 20 for supporting the brick masonry wall,
Wherein,
Is installed on at least one side of the ceiling and the bottom of the building and includes a nut anchored to the chemical anchor 30, the coupler fixing means is fastened to the chemical anchor and the tension member is connected to the wedge,
The coupler fixing means is provided with an anchor hole 41 and a bolt hole through which the chemical anchor penetrates to fix the nut, and a plate-shaped coupler fixing unit 40 for fixing the tension member, and a bolt fastening to the bolt hole of the coupler fixing unit. And a coupler housing 51 having a wedge hole therein, and a wedge-shaped coupler 50 having a tapered shape in which the tension member is fixed to the wedge hole of the coupler housing. Wedge seismic reinforcement structure. delete The method of claim 1, wherein the coupler housing is provided with a wedge hole is fastened with a nut 54 through the housing body 52 and the bolt hole of the coupler anchorage to which the wedge-shaped coupler is mounted is screwed to the housing body Wedge-type seismic reinforcement structure for masonry wall, characterized in that separated by the bolt portion (53). Wedge type according to claim 1, comprising a tension member 10, a reinforcement plate 20, and a fixing means for fixing the tension member to the brick masonry wall on at least one surface of the brick masonry wall partitioning the interior space of the concrete building. By constructing a seismic reinforcement structure 100,
A first step of installing fixing means including chemical anchors 30 in the upper and lower ceiling portions and the bottom or left and right walls of the concrete building, respectively;
After the first step to install the wedge-type seismic reinforcement structure 100 for the masonry wall, the chemical anchor of the fixing means installed in the first step, respectively, the upper and lower or left and right sides of the tension member of the masonry wall reinforcement structure And a second step of connecting the coupler fixing means to the wedge type connecting the tension member to the coupler fixing means and then tightening the nut of the chemical anchor to install the tension member.
In the second step, the chemical anchor 30 is fastened with a nut 31 to the anchor hole 41 of the plate-shaped coupler anchorage 40 which is provided with an anchor hole 41 and a bolt hole to fix the tension member. ,
Bolting the coupler housing 51 having a wedge hole in the bolt hole of the coupler anchorage 40,
Seismic reinforcement method using a wedge-type seismic reinforcement structure for masonry wall, characterized in that to install the tension member by mounting a wedge-shaped coupler (50) of the tapered form is fixed to the wedge hole of the coupler housing.

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