JP2007162354A - Reinforcing method for existing building, and building reinforced by the method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforcing method for an existing building that can impart high resistance to horizontal force applied to the existing building in case of an earthquake while preventing outward design from being greatly impaired. <P>SOLUTION: A plurality of reinforcing columns 2 are erected along external wall surfaces 1a, 1b of the existing building and fixed to the external wall surfaces of the existing building, and truss members arranged within a horizontal plane are fixed to connect the plurality of reinforcing columns. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for reinforcing an existing building and a building reinforced by this method, and more specifically, a reinforcing method capable of imparting a high resistance to a horizontal force applied to an existing building during an earthquake. And a building reinforced by this method.

Japan is one of the world's leading earthquake powers, and large-scale earthquakes that cause many buildings to collapse occur in a relatively short cycle.
Based on the lessons learned from earthquake damage, the earthquake resistance standards for buildings have been revised.After the 1978 Miyagi-ken-Oki Earthquake, the earthquake resistance design method was drastically revised, and the earthquake resistance design standards were significantly revised, and the current new Seismic design standards were born. Buildings built according to this new earthquake resistance standard are said to have suffered little damage in the Great Hanshin Earthquake.
However, there are many existing buildings built according to the old earthquake resistance standards, and it is pointed out that existing buildings built according to these old earthquake resistance standards may be destroyed by an earthquake.

In view of this situation, many techniques for seismic reinforcement of existing buildings built according to the old seismic standards have been proposed.
A typical method for seismic reinforcement of existing buildings is a reinforcement method using braces, for example, the technology disclosed in Patent Document 1 below is an example.
The disclosed technique of Patent Document 1 is a structure in which a steel frame is applied to an RC column and an RC beam from the outside, and a brace is attached thereto so that the reinforcing effect of the brace extends to RC construction.
However, the brace method as disclosed in Patent Document 1 is very disturbing for residents because the brace is located in the window portion, and the open feeling is greatly hindered. There was a problem that the property was greatly impaired.

As a technique proposed in order to eliminate the drawbacks of the brace method, there is a technique disclosed in Patent Document 2 below.
The disclosed technique of Patent Document 2 is a method of attaching a steel frame to the outer surface of a reinforced concrete structure having an opening such as a window and integrating it, and in this way the seismic reinforcement method for strengthening the RC structure later is installed in an existing RC column. A shape steel column having a bending rigidity substantially equal to that of an existing RC column is selected so that a brace is not provided.

  The disclosed technique of Patent Document 2 can solve the problems of the disclosed technique of Patent Document 1 by providing a structure without braces, but on the other hand, it counteracts the horizontal force applied in the event of an earthquake. There was a possibility that sufficient force could not be obtained.

Japanese Patent Application Laid-Open No. 11-193639 JP 2004-169504 A

  The present invention has been made to solve the above-described problems of the prior art, and can impart high resistance to horizontal force applied to existing buildings during an earthquake, as well as from the outside. The present invention provides a method for reinforcing an existing building that does not significantly impair the design, and a building reinforced by this method.

  The invention according to claim 1 is provided with a plurality of reinforcing pillars standing along an outer wall surface of an existing building, fixing the reinforcing pillar to the outer wall surface of the existing building, and a truss member arranged in a horizontal plane. The present invention relates to a method for reinforcing an existing building, wherein the plurality of reinforcing columns are fixed so as to be connected.

  The invention according to claim 2 is provided with a plurality of inner reinforcing columns along the outer wall surface of the existing building, and a plurality of outer reinforcing columns positioned near the outside of each of the inner reinforcing columns. The inner reinforcing pillar is fixed to the outer wall surface of the existing building, and a truss member arranged in a horizontal plane is connected to the plurality of inner reinforcing pillars and the inner reinforcing pillar and the outer reinforcing pillar are connected to each other. It is related with the reinforcement method of the existing building characterized by fixing between pillars.

  The invention which concerns on Claim 3 is a staircase type apartment house provided with the outdoor staircase which an existing building connects between the entrances to each dwelling unit between adjacent dwelling units, In the outdoor staircase side of an existing building, A plurality of outermost reinforcing columns located near the outside of each of the outer reinforcing columns are erected, and the floor height of each floor of the existing building is approximately the same between the outermost reinforcing column and the outer reinforcing column. A new corridor will be provided at a height, and only one of the stairs on either the up or down side of the outdoor stairs connected to the entrance / exit of each dwelling unit will be removed, and the stairs on the other side will not be removed. In the space of the removed staircase portion, the entrance / exit of the dwelling unit and a new hallway provided on the same floor as the dwelling unit are connected by a passage, and the maintained staircase, the dwelling unit entrance / exit and the dwelling unit are connected Connect the new hallway on the upper or lower floor with a new staircase, The space between the corridor and the existing building, to reinforcing method according to claim 2 existing building according to the extension floor, characterized in that constructed individually for each dwelling unit communicating at the same height as each dwelling unit inside.

  According to a fourth aspect of the present invention, the reinforcing column is erected so as to reach the upper side of the existing building, and a floor and a roof are constructed by laying a beam between the reinforcing columns above the existing building. Thus, the present invention relates to a method for reinforcing an existing building according to claim 2, wherein a new living space is formed above the existing building.

  In the invention according to claim 5, a plurality of reinforcing columns are erected along the outer wall surface of the existing building, and the reinforcing column is fixed to the outer wall surface of the existing building and arranged in a horizontal plane. The present invention relates to a building in which a truss member is fixed so as to connect the plurality of reinforcing columns.

  In the invention according to claim 6, a plurality of inner reinforcing columns along the outer wall surface of the existing building and a plurality of outer reinforcing columns located near the outside of each of the inner reinforcing columns are erected. The inner reinforcing column is fixed to the outer wall surface of the existing building, and a truss member arranged in a horizontal plane connects the plurality of inner reinforcing columns and the outer reinforcing column and the outer side. The present invention relates to a building which is fixed between reinforcing columns.

  The invention according to claim 7 relates to the building according to claim 5 or 6, wherein the outer wall surface is two outer wall surfaces of a front-side outer wall surface and a back-side outer wall surface that extend in a direction of the existing building. .

  The invention according to claim 8 relates to the building according to claim 5 or 6, wherein the outer wall surface is all outer wall surfaces of an existing building.

  The invention according to claim 9 relates to the building according to any one of claims 5 to 8, characterized in that the truss member is arranged in an external corridor of the existing building and / or a lower part of the balcony.

  According to the invention which concerns on Claims 1 and 5, a plurality of reinforcing columns connected by truss members are fixed along the outer wall surface of the existing building. High resistance against horizontal force applied can be given, and the truss material is arranged in the horizontal plane, so the truss material does not obstruct the resident's feeling of opening, such as blocking windows, from the outside. The look of the design is not significantly impaired.

  According to the inventions according to claims 2 and 6, the truss member arranged in the horizontal plane is fixed between the inner reinforcing column and the outer reinforcing column, so that the truss member can be fixed easily and stably. The seismic strength of the building after fixing is also excellent.

  According to the invention which concerns on Claim 3, the existing building which consists of a staircase type | mold apartment house can be reborn into the barrier-free one hallway type apartment house which has high earthquake resistance and was extended in the horizontal direction. .

  According to the invention which concerns on Claim 4, an existing building can be reborn into the building which has high earthquake resistance and was extended upwards.

  According to the invention according to claim 7, by reinforcing the two outer wall surfaces of the front side outer wall surface and the back side outer wall surface that extend in the direction of the existing building, generally by reinforcing only the direction of the beam having a low horizontal proof stress, It is possible to give high earthquake resistance to existing buildings while keeping the construction period and cost low.

  According to the invention which concerns on Claim 8, it becomes a building where earthquake resistance was greatly improved compared with the existing building by reinforcing all the outer wall surfaces of the existing building.

  In the invention according to claim 9, the truss material is arranged in the external corridor and / or the lower part of the balcony of the existing building, so that the building has high earthquake resistance, the truss material is not conspicuous in appearance, and has excellent design. It becomes a thing.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a preferred embodiment of a method for reinforcing an existing building according to the present invention and a building reinforced by this method will be described with reference to the drawings.
FIG.1 and FIG.2 is schematic which shows 1st embodiment of the reinforcement method of the existing building which concerns on this invention. In the illustrated example, details such as windows of existing buildings are omitted.
In the method according to the first embodiment, first, as shown in FIG. 1, a plurality of reinforcing pillars (2) are erected along the outer wall surface of the existing building (1). At this time, the reinforcing column (2) is aligned with the position of the column of the existing building (1) (hereinafter referred to as the existing column) so as to cover the entire length in the width direction of the outer wall of the existing building (1). Stand up.

The reinforcing pillar (2) is erected along at least two outer wall surfaces of the front outer wall surface (1a) and the rear outer wall surface (1b) extending in the direction of the existing building (1) in the direction of the arrow (the arrow direction in FIG. 1). However, it may be erected along all the outer wall surfaces including the surface (1c) extending in the wife side direction.
As the reinforcing column (2), an H-shaped steel column, a square steel pipe column, or the like is used.

Next, the erected reinforcing pillar (2) is fixed to the outer wall surface of the existing building (1).
As a fixing method, as described in Patent Document 2, a reinforcing column (2) and an existing column inside the outer wall surface of an existing building (1) are connected to a chemical anchor, a stud gibber, a spiral hoop, a high Although the method of integrating using a strong non-shrink mortar can be illustrated, it is not limited to this method in particular.

And as shown in FIG. 2, the reinforcement of the existing building (1) is completed by fixing the truss member (3) so as to connect all the reinforcing columns (2). As a fixing method, known means such as welding and bolting are used.
The truss member (3) has a known structure in which an oblique member is arranged inside a rectangular frame, and is formed from a high-strength material such as steel.

When the truss member (3) is fixed to the reinforcing column (2), as shown in FIG. 2, the truss member (3) is arranged in the horizontal plane, that is, the surface constituted by the rectangular frame is in the horizontal plane. Fix it so that it is in the direction.
Thus, by fixing the horizontal truss member (3) to the reinforcing pillar (2) fixed to the outer wall surface of the existing building (1), the horizontal strength of the existing building is high. The truss material does not block the window, and the design of the existing building is not greatly impaired.

In the present invention, the length of the truss member (3) may be set according to the length in the width direction of the existing building (1), and has the same length as the length in the width direction of the existing building (1). Two truss members (3) may be used, or a plurality of truss members (3) may be connected to have the same length as the width of the existing building (1). The width of the truss member (3) is set by structural calculation for each existing building (1), and is approximately 600 to 1000 mm. This width is because it can be installed inconspicuously under the balcony or under the external corridor, and the seismic strength can be sufficiently improved.
Further, the number of truss members (3) fixed to one outer wall surface of the existing building (1) (the number arranged in the height direction) may be set according to the number of floors of the existing building (1). For example, as shown in FIG. 2, when the existing building (1) is five stories, five truss members (3) are fixed. Moreover, it is preferable to arrange | position truss material (3) according to the position of the beam of the existing building (1).

Furthermore, in the present invention, when the reinforcing pillar (2) is erected along all the outer wall surfaces including the surface (1c) extending in the direction of the wife of the existing building (1), naturally, the truss material (3) is also arranged and fixed on the surface (1c) extending in the wife side direction.
The fixing method is the same as the method for the front side outer wall surface (1a) and the back side outer wall surface (1b), and the truss member (3) is arranged in a horizontal plane and fixed to the reinforcing column (2).
When the reinforcing pillar (2) is erected along all the outer wall surfaces of the existing building (1) and the truss member (3) is fixed, it is possible to further improve the earthquake resistance of the existing building. Become.

In the present invention, it is preferable to fix not only the reinforcing pillar but also the truss material to the outer wall surface of the existing building. As for the fixing method, the same method as the fixing method for the reinforcing column can be employed.
In the present specification, the description in the text that describes only the “present invention” and does not specify the embodiment is a description that applies in principle to configurations common to all the embodiments.

3 and 4 are schematic views showing a second embodiment of the method for reinforcing an existing building according to the present invention, and hereinafter, differences from the method of the first embodiment will be described. In addition, the same code | symbol is attached | subjected about the same structure as 1st embodiment.
In the method according to the second embodiment, first, as shown in FIG. 3, a plurality of inner reinforcing pillars (21) are erected along the outer wall surface of the existing building (1), and further, the inner side of these plurality A plurality of outer reinforcing columns (22) are erected in the vicinity of the outer side of each of the reinforcing columns (21).
The distance between the inner reinforcing column (21) and the outer reinforcing column (22) is set to be substantially the same as the width of the truss member (3).

  The inner reinforcing column (21) may be erected along at least two outer wall surfaces of the front outer wall surface (1a) and the rear outer wall surface (1b) extending in the direction of the existing building (1). You may stand along all the outer wall surfaces including the surface (1c) extended in a side direction. This configuration is common to other embodiments described later.

Next, the upright inner reinforcing column (21) is fixed to the outer wall surface of the existing building (1) by the same method as in the first embodiment.
Then, as shown in FIG. 4, the truss member (3) arranged in the horizontal plane is connected to all the inner reinforcing columns (21) and the inner reinforcing columns (21) and the outer reinforcing columns (22). ) Are fixed so that they are connected to each other.

  As described above, according to the second embodiment, the truss member (3) can be supported in a supported state between the inner reinforcing column (21) and the outer reinforcing column (22). (3) can be easily and stably fixed, and the seismic strength of the building after reinforcement is superior to that of the first embodiment.

In the present invention, when the existing building (1) is provided with external corridors and balconies, the truss members are not conspicuous in appearance and have a design property when the truss members (3) are arranged in the lower portions of the external corridors and balconies. It is preferable because it is an excellent building. However, it goes without saying that the present invention can also be applied to an existing building having no external corridor or balcony.
Moreover, it is preferable that the foundation of the existing building (1) and the foundation for erecting the reinforcing columns (2), (21), and (22) are integrated.

FIG. 5 thru | or FIG. 12 is schematic which shows 3rd embodiment of the reinforcement method of the existing building which concerns on this invention, and demonstrates a different point from the method of 1st and 2nd embodiment hereafter. In addition, the same code | symbol is attached | subjected about the same structure as the above-mentioned embodiment.
The method according to the third embodiment is a staircase type apartment house in which an existing building (1) is provided with an outdoor staircase (6) connected to an entrance (5) to each dwelling unit between adjacent dwelling units (4). is there. In addition, a balcony (17) is provided on the side opposite to the outdoor staircase (6).
Fig.5 (a) is a top view of the existing building (1), FIG.5 (b) is the schematic longitudinal cross-sectional view. In the third embodiment and the fourth embodiment to be described later, the plan views after FIG. 6 show the lower side of the truss member (3) arranged at the top.

In the method according to the third embodiment, first, as shown in FIG. 6, a plurality of inner reinforcing columns (21) along the outer wall surface of the existing building (1), and the plurality of inner reinforcing columns ( 21) A plurality of outer reinforcing columns (22) are provided upright in the vicinity of the outer side of each of 21). At this time, the distance between the inner reinforcing column (21) and the outer reinforcing column (22) on the outdoor staircase side is set wider than that on the opposite side.
Then, on the outdoor staircase side of the existing building (1), a plurality of outermost reinforcing columns (23) are erected at positions near the outer sides of the plurality of outer reinforcing columns (22).
In the third embodiment and the fourth embodiment to be described later, the foundation (18) of the existing building (1) and the foundation (19) for standing the reinforcing columns (21), (22), and (23). Are preferably integrated.

Next, the upright inner reinforcing column (21) is fixed to the outer wall surface of the existing building (1) by the same method as in the first embodiment.
Then, as shown in FIG. 7, the truss member (3) arranged in the horizontal plane is connected to all the inner reinforcing columns (21) and the inner reinforcing columns (21) and the outer reinforcing columns (22). ). At this time, the truss member (3) is installed near the lower side of the balcony (17) on the side opposite to the outdoor staircase.
Also, the inner reinforcing columns (21), the outer reinforcing columns (22), the outermost reinforcing columns (23), the inner reinforcing columns (21) and the outer reinforcing columns (22), and the outermost reinforcing members are also provided. The columns (23) are connected to each other by a beam (7) made of a steel frame or the like.

Furthermore, as shown in FIG. 8, a new hallway is formed between the outermost reinforcing column (23) and the outer reinforcing column (22) so as to be substantially the same as the floor height of each floor of the existing building (1). (8) is provided, and an elevator (20a) and an escape stairs (20b) are provided at both ends of the new hallway (8).
At this time, a hollow space (9) is formed between the new hallway (8) and the existing building (1), and this space becomes a space for providing a new staircase and an additional floor, which will be described later.

After installing a new corridor (8) on the outdoor staircase (6) side of the existing building at the same height as the floor of each floor, the outdoor staircase (6) connected to the entrance (5) of each dwelling unit (4) Of these, only the stairs on either the up or down side are removed. At this time, the stairs on the other side are maintained without being removed.
Then, this is repeated in the same manner on each floor, and in the space of the removed staircase, the entrance / exit of the dwelling unit and the new corridor (8) provided on the same floor as the dwelling unit are connected by a horizontal passage and maintained. The new staircase is connected to the side staircase, the entrance / exit of the dwelling unit, and a new corridor provided on the upper or lower floor of the dwelling unit.

9 and 10 are explanatory views showing this construction process in more detail.
FIG. 9 shows a case where the outdoor step on the up side is removed and the down side is maintained without being removed, (a) shows the state before construction, and (b) shows the state after construction.
In the case of FIG. 9, in the space of the removed staircase on the upside, the entrance / exit (5) of the dwelling unit and the new hallway (8a) provided on the same floor as the dwelling unit are connected by a horizontal passageway (10). is doing. On the other hand, the maintained downstairs (6), the entrance / exit (5) of the dwelling unit, and the new corridor (8b) provided on the lower floor of the dwelling unit are connected by a new staircase (11).
In addition, a new staircase (11) and a new hallway (8b) on the lower floor are connected via an existing landing (12).

FIG. 10 shows the case where the outdoor step on the down side is removed and the up side is maintained without being removed. (A) is a state before construction, (b) is a state during construction, and (c) is a state after construction. Each state is shown.
In the case of FIG. 10, in the space of the removed stairs, the entrance / exit (5) of the dwelling unit and the new hallway (8a) provided on the same floor as the dwelling unit are connected by a horizontal passage (10). is doing. On the other hand, the maintained upstairs (6), the entrance / exit (5) of the dwelling unit, and the new corridor (8c) provided on the upper floor of the dwelling unit are connected by a new staircase (11).
The new staircase (11) and the new upper corridor (8c) are connected via an existing landing (12). The broken line indicates that the stairs have been removed.

FIG. 11 is a plan view showing a state in which a new staircase (11) is provided.
In this state, a hollow space (9) is formed between the new hallway (8) and the existing building (1).
In the third embodiment, an additional floor that communicates with the atrium space (9) at the same height as the interior of each dwelling unit is constructed.

FIG. 12 is a diagram showing a state where the additional floor (13) has been constructed, in which (a) is a plan view and (b) is a schematic longitudinal sectional view.
As shown in the figure, the additional floor (13) is not constructed uniformly in all the dwelling units (4), but is constructed individually for each dwelling unit. Therefore, it is possible to individually increase the floor for each resident according to the wishes of each resident, and an extension floor (13) is constructed in the resident's unit that wants to expand the room. You can avoid building. In addition, when there is no economic margin, an additional floor can be provided at a point in time when there is an economic margin without providing an additional floor.

The additional floor (13) is a closed space for housing formed in a box shape, and can be constructed by installing a prefabricated box-shaped prefabricated unit, or other methods such as a steel frame. (Light steel frames etc.) can also be built on site.
When a prefabricated unit is used, there is an advantage that the floor expansion work for each dwelling unit can be promoted efficiently.

The dwelling unit of the existing building (1) and the additional floor (13) newly constructed on the front side (side where the outdoor staircase existed) are in communication with each other. Thereby, the resident of the dwelling unit provided with the additional floor (13) can greatly expand the internal space of the room in the horizontal direction.
In addition, since the expansion floor (13) faces the new corridor (8), the existing entrance is closed and a new entrance is provided in the part of the expansion floor (13) facing the new corridor (8). Is also possible.

  The building obtained by the method of the third embodiment described above is a barrier-free one-way apartment house that has high earthquake resistance and is extended in the horizontal direction.

FIGS. 13 to 15 are views showing a fourth embodiment of the method for reinforcing an existing building according to the present invention. Hereinafter, differences from the method of the third embodiment will be described. In addition, the same code | symbol is attached | subjected about the same structure as the above-mentioned embodiment.
In the method according to the fourth embodiment, the existing building (1) has an outdoor staircase (6) connected to the entrance (5) to each dwelling unit between adjacent dwelling units (4) as shown in FIG. This is a staircase type apartment house.

In the method according to the fourth embodiment, first, similarly to the second embodiment, a plurality of inner reinforcing columns (21) along the outer wall surface of the existing building (1), and the plurality of inner reinforcing columns. A plurality of outer reinforcing columns (22) located in the vicinity of the outer side of each of (21) are erected.
In the second embodiment, these reinforcing columns (21) and (22) are substantially the same height as the existing building (1), but in the fourth embodiment, these reinforcing columns (21) ( 22) is the height that extends to the upper side of the existing building (1).
Further, the distance between the inner reinforcing column (21) and the outer reinforcing column (22) on the outdoor staircase side is set wider than that on the opposite side.

Next, the upright inner reinforcing column (21) is fixed to the outer wall surface of the existing building (1) by the same method as in the first to third embodiments.
Then, an extension roof (14) located above the roof of the existing building (1) is provided on the top of these reinforcing columns (21) and (22), and above the roof of the existing building (1). A living space (16) which is provided with a floor member (15) supported by a beam installed in the middle of the reinforcing column and becomes a new dwelling unit between the floor member (15) and the extension roof (14). And surrounding the upper part and the upper part of the existing building by attaching a wall member to the outside of the reinforcing column (see FIG. 14B).
In the illustrated example, two floors of the floor member (15) are provided on the upper part to newly form a living space (16) for two floors. A residential space (16) may be formed.

Further, the truss member (3) arranged in the horizontal plane is fixed between the inner reinforcing column (21) and the outer reinforcing column (22) so as to connect all the inner reinforcing columns (21). . At this time, the truss member (3) is installed near the lower side of the balcony (17) on the side opposite to the outdoor staircase.
The inner reinforcing columns (21), the outer reinforcing columns (22), and the inner reinforcing column (21) and the outer reinforcing column (22) are connected to each other by a beam (7) made of steel or the like. The

After or before forming a new living space (16) above the existing building (1), connect the inner reinforcing column (21) and the outer reinforcing column (22) to each floor. A new hallway (8) is provided on the outdoor staircase (6) side of the dwelling unit across all the dwelling units on the same floor (see FIG. 15).
In the third embodiment, a hollow space (9) is formed between the new hallway (8) and the existing building (1). In the fourth embodiment, the new hallway (8) is an existing building (1). It is provided so that it may touch. Thereby, the upper part of truss material (3) will be covered with a new corridor (8).
Moreover, the outdoor staircase (6) of the existing building (1) is dismantled and a new doorway (24) is provided on the side facing the new hallway (4) from each dwelling unit (4).

  The building obtained by the method of the fourth embodiment described above is a barrier-free one-way apartment house that has high earthquake resistance and is extended upward.

  Since this invention can improve earthquake resistance, without impairing the designability of the existing building, it can be utilized suitably as a method for reinforcing the building built by the old earthquake resistance standard.

It is the schematic which shows 1st embodiment of the reinforcement method of the existing building which concerns on this invention. It is the schematic which shows 1st embodiment of the reinforcement method of the existing building which concerns on this invention. It is the schematic which shows 2nd embodiment of the reinforcement method of the existing building which concerns on this invention. It is the schematic which shows 2nd embodiment of the reinforcement method of the existing building which concerns on this invention. It is the schematic which shows 3rd embodiment of the reinforcement method of the existing building which concerns on this invention. It is the schematic which shows 3rd embodiment of the reinforcement method of the existing building which concerns on this invention. It is the schematic which shows 3rd embodiment of the reinforcement method of the existing building which concerns on this invention. It is the schematic which shows 3rd embodiment of the reinforcement method of the existing building which concerns on this invention. It is the schematic which shows 3rd embodiment of the reinforcement method of the existing building which concerns on this invention. It is the schematic which shows 3rd embodiment of the reinforcement method of the existing building which concerns on this invention. It is the schematic which shows 3rd embodiment of the reinforcement method of the existing building which concerns on this invention. It is the schematic which shows 3rd embodiment of the reinforcement method of the existing building which concerns on this invention. It is the schematic which shows 4th embodiment of the reinforcement method of the existing building which concerns on this invention. It is the schematic which shows 4th embodiment of the reinforcement method of the existing building which concerns on this invention. It is the schematic which shows 4th embodiment of the reinforcement method of the existing building which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Existing building 1a Front side outer wall surface 1b Back side outer wall surface 2 Reinforcement pillar 21 Inner reinforcement pillar 22 Outer reinforcement pillar 23 Outermost reinforcement pillar 3 Truss material 4 Dwelling unit 5 Entrance to each dwelling unit 6 Outdoor stairway 8 New corridor 9 Space 10 Aisle 11 New staircase 13 Extension floor 14 Extension roof 15 Floor member 16 Living space 17 Balcony

Claims (9)

  A plurality of reinforcing pillars are erected along the outer wall surface of the existing building, the reinforcing pillars are fixed to the outer wall surface of the existing building, and the truss members arranged in a horizontal plane are provided with the plurality of reinforcing pillars. A method for reinforcing an existing building, wherein the method is fixed so as to be connected.   A plurality of inner reinforcing columns along the outer wall surface of the existing building and a plurality of outer reinforcing columns positioned near the outside of each of the inner reinforcing columns are erected, and the inner reinforcing columns are Fixing to the outer wall surface of an existing building, and fixing the truss member arranged in a horizontal plane so as to connect the plurality of inner reinforcing columns and between the inner reinforcing column and the outer reinforcing column. A method of reinforcing an existing building characterized by the above.   The existing building is a staircase type apartment house with an outdoor staircase connected to the entrance to each dwelling unit between adjacent dwelling units, on the outdoor staircase side of the existing building, outside each of the outer reinforcing pillars A plurality of outermost reinforcing columns located in the vicinity are erected, and a new hallway is provided between the outermost reinforcing column and the outer reinforcing column at a height substantially equal to the floor height of each floor of the existing building, Of the outdoor stairs connected to the entrance / exit of each dwelling unit, remove only the stairs on either the upside or downside, and maintain the other side without removing the stairs on the removed side. In the space of the part, connect the entrance / exit of the dwelling unit and the new hallway provided on the same floor as the dwelling unit with a passage, and provide the staircase on the maintained side, the entrance / exit of the dwelling unit, and the upper or lower floor of the dwelling unit The new hallway is connected with a new staircase, and the new hallway is connected to the existing building. Reinforcing method of the space, the existing building according to claim 2, characterized in that the extension floor which communicates at the same height as each dwelling unit internal build separately for each dwelling unit.   By standing the reinforcing column so as to reach above the existing building and constructing a floor and a roof by building a beam between the reinforcing columns above the existing building, 3. A method for reinforcing an existing building according to claim 2, wherein a new living space is formed above.   A plurality of reinforcing columns are erected along the outer wall surface of the existing building, the reinforcing column is fixed to the outer wall surface of the existing building, and a truss material arranged in a horizontal plane is used to reinforce the plurality of reinforcing columns. A building characterized by being fixed so as to connect pillars.   A plurality of inner reinforcing columns along the outer wall surface of the existing building and a plurality of outer reinforcing columns located near the outside of each of the inner reinforcing columns are erected, and the inner reinforcing columns are The truss member fixed to the outer wall surface of the existing building and connected in the horizontal plane connects the plurality of inner reinforcing columns and is fixed between the inner reinforcing column and the outer reinforcing column. A building characterized by being.   The building according to claim 5 or 6, wherein the outer wall surfaces are two outer wall surfaces, a front-side outer wall surface and a back-side outer wall surface that extend in the direction of the existing building.   The building according to claim 5 or 6, wherein the outer wall surface is all outer wall surfaces of an existing building.   The building according to any one of claims 5 to 8, wherein the truss member is disposed in an external corridor and / or a lower part of a balcony of an existing building.

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