KR100898389B1 - Aseismatic reinforcing core of a building and constructing method thereof - Google Patents

Abstract

The present invention relates to a seismic reinforcing core of a building and its construction method, the seismic reinforcing core of the building is continuous in the longitudinal direction from the foundation of the building, arranged to have a closed or narrow open cross-sectional arrangement of the staircase, elevator room of the building And a bearing wall adapted to form a fire fighting, communication or electrical pipe, etc .; And a reinforcing strip extending in the longitudinal direction to the load bearing wall without interlayer breakage, and the seismic reinforcing core construction method of the building of the present invention comprises: a cutting part display step; Cutting the core joint structure; Strip groove cutting step; Strip groove chipping step; Strip groove cleaning step; Curing agent coating step; Mortar construction step; Strip attaching step; Strip caulking step; and according to the present invention, by attaching a high-strength strip to the load-bearing wall of the core without interruption, the seismic reinforcement of the building can be effectively, easily, and economically.

Built Structure, Core, Earthquake, Reinforcement, Strip

Description

Aseismatic reinforcing core of a building and constructing method

The present invention relates to an earthquake-resistant reinforcing core of a building and its construction method, and more particularly, seismic resistance of a building that improves the seismic performance of an existing building by increasing the shear strength by a reinforcing strip attached to the longitudinal direction without break. It relates to a reinforcing core and a method of constructing such a seismic reinforcing core.

As the method of seismic reinforcement of reinforced concrete buildings, the following construction methods have been applied according to the seismic performance characteristics of buildings.

First, the seismic reinforcement method when the strength of the building is insufficient is known as a method of increasing the strength of the building, a method of thickening existing walls, closing openings, and expanding new seismic walls.

Secondly, the seismic reinforcement method in the case of lacking ductility of a building is a method of increasing the ductility of a building, and a method of winding a steel plate or high strength fiber on a shear fracture type column or adding a low earthquake resistant wall is generally known. This method improves the shear failure line type, such as the column with very low resistance to external force and the column lacking the shear reinforcement by the shear reinforcement, to the flexural yield line type or the complementary line type line type, and improves the deformation capacity. It is intended to improve seismic performance.

Third, the seismic reinforcement method in the case of poor stiffness balance of the building is a method of ensuring balance by reinforcing columns, installing braces, and adding seismic walls, and symmetrical arrangement of walls such as braces and seismic walls. The seismic strength is strengthened in consideration of weight equalization and light weight.

In particular, seismic reinforcement method is one or two or more of the cross-section increase method, earthquake-proof wall expansion method, brace installation method, reinforcement cladding method is applied depending on the characteristics of the building and structure and the required performance of the seismic bars. The cross-sectional increase method and the cladding method have been widely used in the construction process, but the cross-sectional increase method reinforces the band bars on walls, columns, and beams to reinforce the flexural strength, flexural deformation capacity, and shear strength in existing concrete buildings or structures. As it is a method of overlaying concrete, the construction period is long, it is difficult to construct, and the cross-sectional area of the member is increased. Therefore, it is difficult to secure the parking area in the case of the parking lot, and in the case of the outer column, it is restricted by the building line. In the case of the interior of the building, the ceiling height is lowered due to interference with the equipment, There is a problem such as to significantly reduce the actual use area.

In addition, the seismic wall installation method installs reinforced concrete reinforcement walls between the pillars and the pillars or walls, and therefore entails limitations in practical use, and the seismic walls of the outer walls are difficult to install openings, such as air conditioning ducts or fire extinguishing systems. There is a problem that causes interference with existing equipment.

In addition, the reinforcement method using a steel plate is a method of reinforcing the steel plate to the required structure, it is possible to secure the strength without increasing the cross-sectional area of the member, the most common reinforcement method due to the rigidity of the member and the characteristics of the homogeneous material It can be said, but the weight of the member is heavy, difficult construction, and has a problem that requires a separate process to prevent corrosion.

Lastly, the high-strength fiber coating method, which has recently been in the spotlight due to soaring prices of steel materials, problems caused by corrosion, and increase in labor costs, has the advantage of easy construction and greatly increase the strength. Unlike the construction method, the seismic reinforcing material is disconnected between floors, so it cannot effectively exhibit seismic reinforcement performance. If the strength of concrete interface decreases due to deterioration of air bubbles and surface formed on concrete attachment surface, the surface concrete falls off when the strength increases, In the case of overlapping construction, it is difficult to obtain sufficient reinforcing effect due to the increase of overlapping point, the construction period is long, and the filling phenomenon of the impregnated sheet is difficult. have.

delete

The present invention has been proposed to solve the problems of the conventional building seismic reinforcement methods as described above, the ductility of the building by the seismic reinforcement using the bearing wall of the core continuous from the base of the building to the top floor in the longitudinal direction It improves the horizontal force energy absorption ability by earthquake, effectively reducing the horizontal displacement, and by using high strength strip as reinforcement material, the core is continuously reinforced without interruption between layers, causing shear problems at both ends. Its purpose is to make it possible to greatly improve the overall seismic performance of buildings despite simple and easy construction.

In order to achieve the above object, the present invention is continuous to the longitudinal direction from the foundation of the building, arranged to have a closed or narrow open cross-sectional arrangement to form a staircase, elevator room, and fire, communication or electrical piping of the building, etc. Load bearing wall; And a reinforcing strip extending in the longitudinal direction to the bearing wall without interlayer breakdown.

In addition, the present invention is a cutting portion display step of displaying a cutting display in consideration of the width in the width of the reinforcing strip along the inner and outer sides of the bearing wall to be reinforced in the bearing wall constituting the core of the building; A core joint, in which a core joint structure such as a slab or stair is joined to the load bearing wall, is cut in the same width as the cutting display unit to cut a portion located on the same line as the cutting display unit displayed in the cutting unit display step to form an incision. Structure cutting step; A strip groove cutting step of cutting a strip groove in consideration of the surface degradation depth of the bearing wall along the cut hole and the cutting display portion cut in the core bonding structure cutting step; A strip groove chipping step of chipping a bottom surface of the strip groove cut in the strip groove cutting step; A strip groove cleaning step of removing foreign matters from the bottom surface by spraying high pressure washing water onto the bottom surface of the strip groove chipped in the chipping step; A curing agent applying step of applying a permeable curing agent to the bottom surface of the strip groove washed in the strip groove cleaning step; A mortar construction step of applying a mortar to the bottom surface to which the curing agent is applied in the curing agent applying step to make a smooth surface; A strip attaching step of attaching the reinforcing strip coated with an adhesive to one side on the smooth surface constructed in the mortar construction step and between the reinforcing strip attached to the smooth surface of the strip groove in the strip attaching step and the strip groove It provides a construction method of the earthquake-resistant reinforcement core of the building consisting of;

Therefore, according to the seismic reinforcing core and the construction method of the building according to the present invention, the following effects can be expected.

First, as a reinforcing material, a high strength strip having a tensile strength of 7 to 10 times higher than that of a general steel can be used to secure sufficient reinforcing strength, and a small amount of reinforcing material does not change the shape of the building even after reinforcing is completed.

In addition, the reinforcing strip has a specific gravity as light as 1/5 of the steel, and the weight increase after the reinforcement is insignificant, so that it does not affect the foundation of the building, is sufficiently stable against corrosion, and has high resistance to fatigue. In particular, the reinforced concrete structure cracks due to repeated drying shrinkage over time. If cracks occur, the corrosion of the steel proceeds. As the surface is neutralized and weakened by various deterioration factors invading from the outside, most of the buildings requiring seismic reinforcement are old. As the present invention cannot be performed, the present invention removes the deteriorated concrete surface and attaches the reinforcing strip, thereby preventing the concrete surface from falling off and also by caulking an adhesive such as epoxy at the end of the reinforcing strip. And concrete structure To be able to secure a stable reinforcement strength, thus allowing the ductility of the structure can be further significantly improve the seismic performance.

In addition, cores such as staircases are not structurally vulnerable even if a part is cut to attach a reinforcing strip, and various ducts are open without distinction between floors, making it easy to reinforce vertically and do not require additional measures such as finishing during construction. In many cases, it is possible to save enormous construction costs due to dismantling or rebuilding finishing materials.

In addition, the construction is simple, so the construction can be performed with little effect on the users of the building. The weight of the reinforcing strip is light and the workability is excellent, so it can be installed at the same time in a narrow space. Can be simplified. In particular, since cores such as staircases and elevators often have no obstacles that interfere with construction, construction becomes simple and the air becomes very short.

Finally, the strip reinforcement surface and the existing concrete surface can be formed on the same level, so that construction can be performed without distinguishing secondary finishing materials. You can do it.

Hereinafter, the seismic reinforcing core of a building according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the seismic reinforcing core according to the present invention is a structure that functionally connects the upper and lower parts of the building 1 like the general core, and includes a bearing wall 10 made of concrete and a bearing wall 10. Bar made of reinforcing strip 20 attached to the inner and outer sides of the bearing wall 10 to be reinforced, the bearing wall 10 has a continuous pipe form from the base (3) to the top floor of the building (1), As shown in Fig. 1, a closed cross-section arrangement, closed or closed in a U-shape, is arranged to have an open cross-sectional arrangement, for example, a staircase 7a, an elevator room 7b of a building 1, and fire, communication or electrical piping ( 7c) and the like.

In addition, the reinforcing strip 20 attached to the inner and outer sides of the bearing wall 10 as described above is extended in the longitudinal direction to the bearing wall 10 without interlayer breakdown, as shown in Figures 1 and 2 for this purpose, The core bonding structure 21 such as slabs or stairs of each layer supported by the outer wall of the staircase chamber 7a is penetrated.

At this time, the reinforcing strip 20 is made of one material selected from aramid FRP strip or carbon FRP strip, if it has a high strength can be replaced with any kind of material.

Thus, the core 2 of the present invention is arranged to attach the reinforcing strip 20 so as to be evenly distributed throughout without being biased toward any of the bearing walls 10 as shown in FIGS. 3 and 4, for example. Among the cores 2, it is preferable to attach the reinforcing strip 20 to the core cores 2 located in the center, that is, the four sides of the core 2 of the staircase 7a in the case shown, and the reinforcing strip 20 It is more preferable to be arranged in pairs so as to face each other on the inner and outer sides (10a, 10b) of the bearing wall (10) in attaching.

In addition, the load bearing wall 10 may be attached to both the inner and outer surfaces 10a and 10b simultaneously to reinforce the reinforcing strip 20 and may be attached only to either the inner surface 10a or the outer surface 10b. The strip 20 attached to either side may be attached to protrude from the bearing wall 10 surface, and the strip groove 31 may be machined into the bearing wall 10 as illustrated in FIGS. 12 to 15. And it may be attached in the form of a smooth surface 71 in the form of sandwiching the reinforcing strip 20, the strip groove 31 is the inner and outer surfaces (10a, 10b) to a slightly deeper than the thickness of the reinforcing strip (20) It is formed by cutting in the longitudinal direction along the bottom surface 32 of the cut strip groove 31 is thus chipped, as described later, the curing agent and mortar are applied in sequence to form a smooth surface 71, reinforcement Epoxy for adhering to smooth surface 71 on inner surface of strip 20 The same adhesive is applied, and the outer surface 22 may be covered with a strip groove 31 to which the reinforcing strip 20 is attached, and a finishing material 101 for improving aesthetics of the inner and outer surfaces 10a and 10b may be constructed. have.

Now, the construction method of the seismic reinforced steel core of a building according to a preferred embodiment of the present invention configured as described above will be described.

Method for constructing a seismic reinforcing core (2) in the building (1) according to the present invention is a cutting part display step (S10), core joint structure cutting step (S20), strip groove cutting step as shown in Figure 5 to 15 (S30), strip groove chipping step (S40), strip groove cleaning step (S50), hardener coating step (S60), mortar construction step (S70), strip attaching step (S80), and strip caulking step (S90) .

Among these, first, in the cutting part display step S10, as shown in FIG. 6, the inner surface 10a of the bearing wall 10 to be reinforced among the bearing walls 10 constituting the core 2 of the building 1 is shown. Or the cutting display unit 11 in consideration of the allowable width in the width of the reinforcing strip 20 in the longitudinal direction along the outer surface 10b.

Next, in the core bonding structure cutting step (S20), as shown in FIG. 7, the core bonding structure 21 and the bearing wall 10, such as slabs or stairs, which are bonded and supported by the core bearing wall 10 are joined. Bars 23 are formed to penetrate through the reinforcing strips 20 to pass through the reinforcing strips 20. The cutouts 23 are positioned on the same line as the cut display 11 shown in the cutting part display step S10. It is disposed so as to be cut in the same width as the cutting display portion (11).

In addition, the strip groove cutting step (S30), as shown in Figure 8, passing through the cut hole 23 cut in the core bonding structure 21 along the cutting display portion 11 is displayed on the bearing wall (10). By cutting the strip groove 31 in the bearing wall (10). In this case, it is preferable to determine the cutting depth in consideration of the surface degradation depth of the bearing wall 10.

Next, in the strip groove chipping step S40, as shown in FIG. 9, the bottom surface of the strip groove 31 cut in the bearing wall 10 along the cutting display unit 11 in the strip groove cutting step S30. Chip 32 is, so that it is possible to increase the adhesion strength of the mortar which is constructed on the bottom surface 32 of the strip groove 31 in a subsequent step.

Then, in the strip groove cleaning step (S50), as shown in Figure 10, by spraying the high pressure washing water 51 to the bottom surface 32 of the strip groove 31 by the injection hose 53 or the like chipping step After the chipping is finished in S40, foreign matter remaining on the bottom surface 32 is neatly removed.

Then, in the curing agent application step (S60), as shown in Figure 11, in the strip groove cleaning step (S50) a permeable curing agent (primer) to the bottom surface 32 of the strip groove 31 from which the chipping foreign matter is removed Apply. At this time, the permeable curing agent is mixed with the main agent and the curing agent in a weight ratio of 2: 1 until the overall color becomes uniform with an electric mixer or the like for 2-3 minutes.

Next, in the mortar construction step (S70), as shown in Figure 12, in the hardener application step (S60) by applying a high-strength mortar on the bottom surface 32 of the strip groove 31, the curing agent is applied to the bottom surface ( A smooth surface 71 is made by filling in the missing part of 32). At this time, the step of the smooth surface 71 is preferably finished so as to remain within 1mm.

Subsequently, in the strip attaching step (S80), as shown in FIG. 13, the reinforcing strip 20 is attached to the strip groove 31 having the smooth surface 71 formed on the bottom thereof. An adhesive 81 is applied to the inner side of the reinforcing strip 20 facing the smooth surface 71 of the substrate. At this time, an epoxy resin or the like may be used as the adhesive 81, and when epoxy resin is used, about 300 to 600 g per 1 m is an appropriate amount.

Next, in the strip caulking step S90, as shown in FIG. 14, the edge end of the reinforcing strip 20 attached to the strip groove 31 and the inner circumferential surface of the strip groove 31 in the strip attaching step S80. Caulk adhesive 81 in the gap between.

At this time, when the surface to which the reinforcing strip 20 is attached is the inner surface 10a of the bearing wall 10 facing the inner side of the core 2, all operations are completed by the strip caulking step S90, but FIGS. As shown in FIG. 4, when the reinforcing strip 20 attaching surface is exposed to the user on the inner and outer surfaces 10a and 10b of the bearing wall 10, such as the staircase chamber 7a, as shown in FIG. 15 in consideration of aesthetics, After finishing the external exposed surface of the reinforcing strip 20, that is, the outer surface 22, the finishing material 101 is finally constructed.

1 is a perspective view showing a skeleton of a building to which an earthquake-resistant reinforcing core according to the present invention is applied.

FIG. 2 is a partial, detailed perspective view of the reinforcing strip shown in FIG. 1 in detail. FIG.

3 is a plan view of the structure shown in FIG.

4 is a front view of the building shown in FIG.

Figure 5 is a block diagram sequentially showing a method for constructing a seismic reinforcement core according to the present invention.

FIG. 6 is a partial perspective view of the core bearing wall illustrating the cutting part display step of FIG. 5; FIG.

FIG. 7 is a partial perspective view of the core bearing wall schematically illustrating the step of cutting the core joint structure of FIG. 5; FIG.

FIG. 8 is a partial perspective view of the core bearing wall illustrating the strip groove cutting step of FIG. 5; FIG.

9 is a partial perspective view of the core bearing wall illustrating the strip groove chipping step of FIG.

FIG. 10 is a partial perspective view of the core bearing wall illustrating the strip groove cleaning step of FIG. 5; FIG.

FIG. 11 is a partial perspective view of the core bearing wall illustrating the curing agent applying step of FIG. 5; FIG.

12 is a partial perspective view of the core bearing wall schematically illustrating the mortar construction step of FIG. 5.

FIG. 13 is a partial perspective view of the core bearing wall illustrating the strip attaching step of FIG. 5; FIG.

FIG. 14 is a partial perspective view of the core bearing wall illustrating the strip caulking step of FIG. 5; FIG.

15 is a partial perspective view of the core bearing wall illustrating the steps of constructing a finish on the outer side of the reinforcing strip;

<Description of the symbols for the main parts of the drawings>

1: building 2: core

3: foundation 10: bearing wall

11: cutting display unit 20: reinforcing strip

21: core bonded structure 23: cut hole

31: strip groove 32: bottom surface

51: wash water 71: smooth surface

81: adhesive 101: finish

Claims (9)

(delete) (delete) (delete) (delete) Continuously extending from the foundation 3 of the building 1 in the longitudinal direction and arranged to have a closed or narrow open cross-sectional arrangement, such as the staircase room 7a, the elevator room 7b, and the fire, communications or electrical piping 7c of the building. A load bearing wall 10 adapted to form a back and the like; It extends in the longitudinal direction to the load bearing wall 10 without interlayer breakage and consists of an aramid FRP strip or a carbon FRP strip, and is uniformly distributed throughout the load bearing wall 10 without being biased to one of the bearing walls 10. Reinforcing strip 20 is paired to face each other on the inner and outer sides (10a, 10b) of the; The bearing wall 10 includes at least one strip groove 31 made by cutting in the longitudinal direction along the inner and outer sides 10a and 10b to be reinforced; A smoothing surface 71 formed by chipping each bottom surface 32 of the strip groove 31, applying a curing agent, and applying mortar; An adhesive 81 applied to an inner surface of the reinforcing strip 20 to attach to the smooth surface 71; And A seismic reinforcing core of a building, comprising: a finishing material (101) which is constructed on the outer surface of the reinforcing strip (20) to improve the aesthetics of the bearing wall (10). (delete) (delete) The cutting display unit may be formed by considering the allowable width in the width of the reinforcing strip 20 along the inner and outer surfaces 10a and 10b of the bearing wall 10 to be reinforced among the bearing walls 10 constituting the core 2 of the building 1. Cutting part display step (S10) of displaying 11); Among the portions where the core bonding structure 21 such as the slab or the staircase is joined to the bearing wall 10, the cutting display portion may be formed at the same line as the cutting display portion 11 displayed in the cutting portion display step S10. A step of cutting the core joint structure to cut to the same width as 11) to form the cutting hole 23 (S20); Strip groove cutting to cut the strip groove 31 in consideration of the surface degradation depth of the bearing wall 10 along the cutting hole 23 and the cutting display portion 11 cut in the core bonding structure cutting step (S20). Step S30; Strip groove chipping step (S40) for chipping the bottom surface 32 of the strip groove 31 cut in the strip groove cutting step (S30); Strip groove cleaning step (S50) of removing foreign substances from the bottom surface 32 by spraying the high pressure washing water 51 to the bottom surface 32 of the strip groove 31 chipped in the strip groove chipping step (S40). ); The permeable curing agent is applied to the bottom surface 32 of the strip groove 31 washed in the strip groove cleaning step (S50), the main color and the curing agent of the permeable curing agent in a weight ratio of 2: 1 to be uniform in overall color. Curing agent application step (S60) used by mixing for 2 to 3 minutes; Mortar construction step (S70) to make a smooth surface 71 by applying mortar to the bottom surface 32, the curing agent is applied in the curing agent application step (S60); The reinforcing strip 20 coated with an adhesive 81 on one side is attached onto the smooth surface 71 constructed in the mortar construction step S70, wherein the adhesive 81 is an epoxy resin and the amount of the epoxy resin is used. A strip attaching step (S80) of 300 to 600 g / m; And Strip caulking for caulking the adhesive 81 at the end between the reinforcing strip 20 and the strip groove 31 attached to the smooth surface 71 of the strip groove 31 in the strip attaching step (S80). Step (S90); construction method of the seismic reinforcement core of a building, characterized in that consisting of. The method of claim 8, After finishing the strip caulking step S90, the outer surface 22 of the reinforcing strip 20 is ground, and then the finishing material 101 is disposed on the outer surface 22 to improve the aesthetics of the bearing wall 10. Construction method of the seismic reinforcement core of a building, characterized in that the construction.

Images