Seismic retrofitting structure of school building, and seismic retrofitting method using retrofitting structure

Abstract

The present invention relates to a seismic retrofitting structure of a school building and a seismic retrofitting method using the retrofitting structure, and, more specifically, can be applied to both a conventionally-built school and a newly-built school, and can prevent collapse through a seismic energy dissipation effect when an earthquake occurs.

Description

Seismic reinforcement structures for school buildings and seismic reinforcement methods using the reinforced structures

[0001] The present invention relates to an earthquake-resistant reinforcement structure for concrete buildings such as schools, public offices, etc., and an earthquake-resistant reinforcement method using the reinforcement structure. More specifically, the present invention relates to an earthquake-resistant reinforcement structure for school buildings and an earthquake-resistant reinforcement method using the reinforcement structure, which can be applied to both existing and newly constructed schools, and which can prevent collapse by dissipating earthquake energy when an earthquake occurs.

[0002]

[0003] Earthquake loads are a natural phenomenon that is instantaneous and difficult to predict in advance, and they cause severe damage to buildings, especially concrete buildings, that are poorly designed for earthquake resistance and seismic control. In recent years, many young students have died in school building collapses due to earthquakes in Japan, Turkey, Pakistan, and China, causing great shock.

[0004] The classroom is the fundamental space in school buildings. Because lighting and ventilation are crucial for classrooms, the exterior walls facing the outside are comprised of a sill and a partition wall, with windows located within the partition wall.

[0005] In addition, in reinforced concrete school buildings, columns for supporting the load of the waist wall must be placed in appropriate locations, and columns must not be located in the center of the basic module so as not to obstruct the view of students when looking at one classroom as shown in Fig. 1.

[0006] Accordingly, reinforced concrete buildings such as schools are designed to be safe because the columns simultaneously receive axial force and lateral load due to the weight when an earthquake load is applied, but columns that are not designed to resist earthquakes do not have a high resistance to lateral loads, so bending failure or shear failure due to lateral loads can occur. Shear failure induces sudden destruction of the columns supporting the structure, which can cause the collapse of the structure and cause casualties.

[0007] Therefore, in order to prevent building collapse and casualties, it is necessary to dissipate seismic energy by improving the shear strength of columns expected to undergo shear failure when an earthquake occurs, thereby inducing ductile failure rather than brittle failure, that is, ductile behavior followed by bending failure.

[0008] Related prior art includes Patent Registration No. 10-1404572 (Title of invention: Seismic reinforcement method using wing walls of school buildings).

[0009] The above prior patent suggests a method for earthquake-resistant reinforcement using the wing walls of a school building, but it is difficult to say that the earthquake-resistant reinforcement was sufficient because the cross-shaped beams, which play a key role in the event of an actual building collapse, were not subjected to earthquake-resistant reinforcement.

[0010]

[0011] Accordingly, the present invention recognizes the above problems and proposes a solution thereto, and can be applied to concrete buildings such as existing government offices and schools as well as newly built schools and government offices, and the purpose is to provide a seismic reinforcement structure for a school building and a seismic reinforcement method using the reinforced structure, which maximizes the dissipation effect by combining with nearby columns by seismically reinforcing the upper cross beam of the partition dividing the classrooms so as to prevent collapse by dissipating seismic energy in the event of an earthquake.

[0012]

[0013] In order to achieve the above purpose, the earthquake-resistant reinforcement structure (S) of the present invention has a base plate (110) having a plurality of fixing grooves (111) formed on one side of the edge so that it can be fixed to the first floor slab layer (40), a lower support member (120) is integrally fused and fixed to the upper side of the base plate (110), an insertion joint (130) is formed on the upper side of the lower support member (120) so that it can be easily inserted and fixed with the lower side of the upper support member (210), and a plurality of joining holes (131) are formed on the outer side of the insertion joint (130) so that the upper and lower parts can be inserted and fixed through bolts (300) and nuts (330), and a lower reinforcement member (100) having an 'H' shape in the cross section so that it can be inserted and fixed to the insertion joint (130) of the lower reinforcement member (100), and a joining The present invention is characterized in that it comprises an upper support member (210) having a fastening groove (211) corresponding to a long hole (131), a base plate (220) having a plurality of connecting fixing grooves (221) formed on the upper end of the upper support member (210) is fused and fixed, and four cross blocks (230) each having fixing grooves (231) formed on the upper end of the base plate (220) are fused and fixed to form a cross-shaped fixing portion (240), and a cross beam (50) in which a vertical main beam (20) and a horizontal auxiliary beam (30) intersect is fixed and fixed on the cross-shaped fixing portion (240).

[0014] In addition, the fitting joint (130) is characterized in that symmetrical fitting protrusions (132) are formed at a certain interval so that the lower surface of the upper support (210) can be fitted and fixed, and at the same time, an 'H'-shaped mounting cross-section (133) is formed so that the lower surface of the upper support (210) is prevented from further downward movement while in contact, and a curved opening (134) is formed on the upper side of the fitting protrusion (132) so that the lower surface of the upper support (210) is not interfered with when fitted.

[0015] In addition, when the lower reinforcement bar (100) and the upper reinforcement bar (200) are installed continuously on the second floor or higher of the classroom, the lower reinforcement bar (100) is fixed to the first floor slab layer (40) and the upper reinforcement bar (200) is fixed and joined, and a plurality of perforated grooves (61) are formed in the second floor slab layer (60), and then the fixing grooves (111a) of another lower reinforcement bar (100a) are aligned and a 'ㄷ' shaped fixing bolt (310) is connected and fixed by penetrating the fixing grooves (111a), the perforated grooves (61), and the fixing grooves (221), respectively.

[0016] And the seismic reinforcement method using the seismic reinforcement structure (S) of the school building is as follows: after cutting and removing the classroom partition constructed on the lower side of the cross beam (50), a plurality of fixing grooves for fixing the lower reinforcement member (100) are drilled in the 1st floor slab layer (40), anchor bolts are inserted and fixed therein, and at the same time, chemical anchors are injected to fix the anchor bolts (320); the lower reinforcement member fixing step (S200) of fixing the lower reinforcement member (100) of the first clause to the anchor bolt (320); and the upper reinforcement member (200) of the first clause is fitted and fixed to the fitting joint (130) of the lower reinforcement member (100). In the case where seismic reinforcement is performed only on the first floor, a plurality of perforation grooves (51) are formed on the side of the cross beam (50), and then fixing bolts (300) are formed in the perforation grooves and the cross block (230). Each is connected and fixed by penetrating into the fixed home (231),

[0017] In the case where earthquake-resistant reinforcement is performed on the 2nd and 3rd floors after the upper reinforcement bar (200) of the 1st clause is fixed, a plurality of perforated grooves (61) are formed in the 2nd floor slab layer (60) and then the fixing grooves (111a) of another lower reinforcement bar (100a) are aligned, and then a 'ㄷ' shaped fixing bolt (310) is inserted through the fixing grooves (111a), the perforated grooves (61), and the fixing grooves (221) respectively to connect and fix them, and then the fixing bolt (300) is fastened with a nut (330) to fix the upper and lower reinforcement bars (200, 100) to reinforce earthquake resistance, and the finishing processing step (S400) to reconstruct the partition wall that has been cut and removed and tidy up the surrounding area.

[0018] In addition, when fixing the upper reinforcement (200) to the cross beam (50) or the second floor slab layer (60), if there is a difference in height between the vertical main beam (20) and the horizontal auxiliary beam (30), a gap adjustment plate (250) is inserted into the cross-shaped fixing portion (240) to match the heights and then fix it.

[0019]

[0020] The earthquake-resistant reinforcement structure of a school building of the present invention having the above-described characteristics and the earthquake-resistant reinforcement method using the reinforcement structure can be applied to not only existing schools but also newly constructed schools, and can prevent collapse by dissipating seismic energy when an earthquake occurs, and in particular, has the effect of maximizing the dissipation effect by harmonizing with nearby columns by earthquake-resistant reinforcement of the upper cross beam of the partition dividing the classrooms.

[0021]

[0022] Figure 1 is a plan view showing the locations of columns and beams in a school building.

[0023] Figure 2 is an exploded perspective view showing a preferred embodiment of the present invention.

[0024] Figure 3 is a perspective view showing a preferred embodiment of the present invention.

[0025] Figure 4 is a bottom perspective view showing the upper high-strength section of the main body of the present invention cut away.

[0026] Figure 5 is an exploded perspective view showing another embodiment of the present invention.

[0027] Figure 6 is a cross-sectional view showing a preferred embodiment of the present invention in use.

[0028] Figures 7 and 8 are cross-sectional views showing another embodiment of the present invention in a state of use.

[0029] Figure 9 is a block diagram illustrating a seismic reinforcement process of a preferred embodiment of the present invention.

[0030]

[0031] Hereinafter, the present invention will be described in detail with reference to the attached drawings and preferred embodiments.

[0032] First, the earthquake-resistant reinforcement structure (S) of the school building is largely composed of a lower reinforcement member (100) that is fixed to the first floor slab layer (40) as shown in Figures 2 and 3, and an upper reinforcement member (200) that is fixed by being joined to the lower reinforcement member (100) and at the same time a cross beam (50) is introduced to be fixed.

[0033] At this time, the lower reinforcement member (100) is provided with a base plate (110) as shown in FIGS. 2 and 3, and a number of fixing grooves (111) are formed on one side of the edge thereof.

[0034] On the upper side of the base plate (110), a lower support (120) is integrally fused and fixed, and on the upper side of the lower support (120), a fitting portion (130) is formed to facilitate fitting and connection with the lower side of the upper support (210), and on the outer side of the fitting portion (130), a number of connecting holes (131) are formed so that the upper and lower parts are fitted and fixed together using bolts (300) and nuts (330).

[0035] The above fitting joint (130) has symmetrical fitting protrusions (132) protruding at a certain interval so that the lower surface of the upper support (210) can be fitted and fixed, and at the same time, an 'H'-shaped mounting cross-section (133) is formed to prevent the lower surface of the upper support (210) from further downward movement while in contact, and a curved opening (134) is formed on the upper side of the fitting protrusion (132) so that the lower surface of the upper support (210) is not interfered with when fitted.

[0036] The upper reinforcement member (200) has a cross-section in the shape of an 'H' so that it can be fitted into the fitting portion (130) of the lower reinforcement member (100) as shown in FIGS. 2 to 4, and an upper support member (210) is provided on the lower side with a fastening groove (211) corresponding to the fitting hole (131).

[0037] A base plate (220) having a plurality of connecting fixing grooves (221) formed on the upper side of the upper support (210) is fused and fixed, and four cross blocks (230) having fixing grooves (231) formed on the upper side of the base plate (220) are fused and fixed at each of four locations to form a cross-shaped fixing portion (240), and a cross beam (50) in which a vertical main beam (20) and a horizontal auxiliary beam (30) intersect is fixed and fixed on the cross-shaped fixing portion (240).

[0038] In addition, when the lower reinforcement bar (100) and the upper reinforcement bar (200) are installed continuously on the second floor or higher of the classroom, as shown in FIG. 7, the lower reinforcement bar (100) is fixed to the first floor slab layer (40), the upper reinforcement bar (200) is fixed by joining and fixing, and after forming a plurality of perforation grooves (61) in the second floor slab layer (60), the fixing grooves (111a) of another lower reinforcement bar (100a) are aligned, and then a 'ㄷ' shaped fixing bolt (310) is connected and fixed by penetrating the fixing grooves (111a), the perforation grooves (61), and the fixing grooves (221), respectively.

[0039] The above 'ㄷ' shaped fixed bolt (310) is fixed to each of the main beam (20) and auxiliary beam (30) or at the same location, but can be selected and fixed according to the conditions of the work site.

[0040] And the earthquake-resistant reinforcement method using the earthquake-resistant reinforcement structure (S) of the school building is as shown in Figures 6 to 9, in which the classroom partition constructed on the lower side of the cross beam (50) is cut and removed, and then a number of fixing grooves for fixing the lower reinforcement member (100) are drilled in the 1st floor slab layer (40), anchor bolts are inserted and fixed inside, and at the same time, chemical anchors are injected to fix the anchor bolts (320) (S100).

[0041] After fixing the aforementioned lower reinforcement member (100) to the above anchor bolt (320) (S200), the aforementioned upper reinforcement member (200) is fixed by fitting it into the fitting joint (130) of the lower reinforcement member (100), and then the upper and lower reinforcement members (200, 100) are fixed while the cross beam (50) is aligned with the cross block (230) to reinforce earthquake resistance (S300).

[0042] At this time, when seismic reinforcement is performed only on the first floor, as shown in FIG. 6, a plurality of perforation grooves (51) are formed on the side of the cross beam (50), and then the fixing bolts (300) are connected and fixed by penetrating each of the perforation grooves and the fixing grooves (231) formed in the cross block (230), and when seismic reinforcement is performed on the second and third floors, as shown in FIG. 7, a plurality of perforation grooves (61) are formed on the second floor slab layer (60), and then, while aligning the fixing grooves (111a) of another lower reinforcement member (100a), the 'ㄷ' shaped fixing bolts (310) are connected and fixed by penetrating each of the fixing grooves (111a), the perforation grooves (61), and the fixing grooves (221), and then the fixing bolts (300) are fastened with nuts (330) to reinforce the seismicity.

[0043] That is, it is a structure in which the lower reinforcement and the upper reinforcement are continuously connected.

[0044] As described above, when the installation and fixing work of the upper and lower reinforcement members (200, 100) is completed, the seismic reinforcement work of the school building using the seismic reinforcement structure (S) is completed by reconstructing the cut-out partition wall and cleaning up the surrounding area and performing finishing treatment (S400).

[0045] Meanwhile, when fixing the upper reinforcement (200) to the cross beam (50) or the second floor slab layer (60), if there is a difference in height between the vertical main beam (20) and the horizontal auxiliary beam (30), as shown in FIG. 8, the heights can be matched by inserting a gap adjustment plate (250) into the cross-shaped fixing portion (240) and then fixing it.

[0046] The above earthquake-resistant reinforcement work can be carried out by constructing each classroom unit and connecting them to the 2nd and 3rd floors at the same location. As a result, the earthquake energy is dissipated as the earthquake-resistant reinforcement is completed, thereby preventing collapse.

[0047] Although embodiments of the present invention have been described, those skilled in the art will be able to modify and change the present invention in various ways by adding, changing, deleting, or adding components within the scope that does not depart from the spirit of the present invention described in the claims, and this will also be considered to be included within the scope of the rights of the present invention.

Claims

1. A lower reinforcement member (100) having a plurality of fixing grooves (111) formed on one side of the edge of the base plate (110) so that it can be fixed to the 1.1st floor slab layer (40), a lower support member (120) integrally fused and fixed to the upper side of the base plate (110), and an insertion joint (130) formed on the upper side of the lower support member (120) so that it can be easily inserted and connected to the lower side of the upper support member (210), and a plurality of insertion holes (131) are formed on the outer side of the insertion joint member (130) so that the upper and lower parts are inserted and fixed together through bolts (300) and nuts (330); and, An upper support member (210) having a cross-section in the shape of an 'H' so as to be fitted into the fitting portion (130) of the lower reinforcement member (100), and having a fastening groove (211) formed on the lower side corresponding to the fitting hole (131), and a base plate (220) having a plurality of connecting fixing grooves (221) formed on the upper end of the upper support member (210) is fused and fixed, and a cross block (230) having fixing grooves (231) formed on the upper end of the base plate (220) is fused and fixed at four locations to provide a cross-shaped fixing portion (240), and a cross beam (50) in which a vertical main beam (20) and a horizontal auxiliary beam (30) intersect is fixed and fixed on the cross-shaped fixing portion (240); Seismic reinforcement structure of a school building characterized by comprising:

2. In paragraph 1, The above fitting joint (130) is characterized in that symmetrical fitting protrusions (132) are formed protruding at a certain interval so that the lower surface of the upper support (210) can be fitted and fixed, and at the same time, an 'H'-shaped fixing cross-section (133) is formed to prevent the lower surface of the upper support (210) from further downward movement while in contact, and a curved opening (134) is formed on the upper side of the fitting protrusion (132) so that the lower surface of the upper support (210) is not interfered with when fitted.

3. In paragraph 1, An earthquake-resistant reinforcement structure for a school building characterized in that when the lower reinforcement bar (100) and the upper reinforcement bar (200) are installed continuously on the second floor or higher of a classroom, the lower reinforcement bar (100) is fixed to the first floor slab layer (40) and the upper reinforcement bar (200) is combined and fixed, and a plurality of perforated grooves (61) are formed in the second floor slab layer (60), and then the fixing grooves (111a) of another lower reinforcement bar (100a) are aligned and a 'ㄷ'-shaped fixing bolt (310) is connected and fixed by penetrating the fixing grooves (111a), the perforated grooves (61), and the fixing grooves (221), respectively.

4. After cutting and removing the classroom partition constructed on the lower side of the crosswalk (50), a number of fixing grooves for fixing the lower reinforcement (100) are drilled in the 1st floor slab layer (40), and anchor bolts are inserted and fixed inside them, and at the same time, chemical anchors are injected to fix the anchor bolts (320) in the anchor bolt fixing step (S100); and, A lower reinforcement fixing step (S200) for fixing the lower reinforcement (100) of the first clause to the above anchor bolt (320); and, In the case where the upper reinforcement member (200) of the first clause is fitted and fixed to the fitting joint (130) of the lower reinforcement member (100) above and earthquake-resistant reinforcement is performed only on the first floor, a number of perforation grooves (51) are formed on the side of the cross beam (50), and then the fixing bolts (300) are connected and fixed by penetrating each of the perforation grooves and the fixing grooves (231) formed in the cross block (230). In the case of performing earthquake-resistant reinforcement for the 2nd and 3rd floors after fixing the upper reinforcement bar (200) of the 1st clause, a plurality of perforated grooves (61) are formed in the 2nd floor slab layer (60) and then the fixing grooves (111a) of another lower reinforcement bar (100a) are aligned, and then a 'ㄷ' shaped fixing bolt (310) is inserted through the fixing grooves (111a), the perforated grooves (61) and the fixing grooves (221) respectively to connect and fix them, and then the fixing bolt (300) is fastened with a nut (330) to fix the upper and lower reinforcement bars (200, 100) to reinforce earthquake resistance, the upper and lower reinforcement bar fixing step (S300); and, The finishing process (S400) involves reconstructing the partition wall after cutting it and cleaning up the surrounding area; A method for earthquake-resistant reinforcement using an earthquake-resistant reinforcement structure of a school building characterized by being composed of .

5. In paragraph 4, A method for earthquake-resistant reinforcement using an earthquake-resistant reinforcement structure for a school building, characterized in that when a difference in height occurs between a vertical main beam (20) and a horizontal auxiliary beam (30) when fixing the upper reinforcement member (200) to a cross beam (50) or a second-floor slab layer (60), a gap adjustment plate (250) is inserted into a cross-shaped fixing member (240) to match the heights and then fix the structure.

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