JP2017025663A - Reinforcing method of existing building and building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcing method or the like of an existing building, the method that can easily improve earthquake resistance after securing an original effective open area.SOLUTION: A reinforcing method of an existing building is provided, the building that has multiple floors configured by multiple existing columns 3 and beams 4 installed on a foundation 5, has openings 10 configured by a portion of the existing columns 3a and beams 4a, and has the area of each floor segmented by providing doors and walls to the openings 10. A stud 40 formed by steel materials is installed between the existing column 3a, 3a constituting the opening 10 of the upper floor, and the other stud 40a is installed in the position being a lower floor of the floor where the stud 40 is installed and in the same vertical direction of the stud 40, and thereby axial force is transmitted to the foundation 5.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a reinforcement method for an existing building, and more specifically to a reinforcement method by installing studs.

  Various methods are known as reinforcement methods to reinforce existing buildings for the purpose of improving earthquake resistance without rebuilding, and as an example of a reinforcement method that can be easily constructed, a method incorporating a steel brace is known. ing. (For example, refer to Patent Document 1).

  The reinforcement method shown in Patent Document 1 is a method of incorporating braces into the pillars and beams of the building, and extends along the columns and beams constituting the building so as not to interfere with the openings formed in the walls of the building. In this method, the braces are joined to each intermediate portion of the frame so as to form a generally rhombus shape as a whole.

Japanese Patent Laid-Open No. 11-200268

  In general, the method of incorporating a brace into a building obstructs traffic when there is an opening such as a corridor, door, or window at the installation position. It will be sacrificed.

  In addition, the reinforcing method shown in Patent Document 1 is effective for installation in windows because it does not block all of the openings. For example, in installation in hallways or windows, part of the brace is not open. Since it passes through the inside of the corner, the original effective opening area may be narrowed, which may hinder traffic, and is difficult to install in a corridor or door. In addition, since the brace is exposed inside or outside the window, there is a disadvantage that the appearance looks very bad.

  Therefore, in order to solve an example of such a problem, the present application aims to provide a reinforcement method for an existing building that can easily improve the earthquake resistance while securing an original effective opening area. To do.

  In order to solve the above-described problem, the reinforcement method for an existing building according to claim 1 of the present application is configured by a plurality of existing columns (3) and beams (4) installed on the foundation (5), In the reinforcement method for existing buildings on a plurality of floors having an opening (10) composed of the existing pillars (3a) and beams (4a), and by providing doors and walls in the openings, the areas of each floor are divided. An inter-column (40) formed of a steel material is installed between the existing columns constituting the opening of the upper floor, and a brace frame (50) is joined to the inter-column, and the lower layer of the floor where the inter-column is installed In the floor, another stud (40a) is installed at the same position in the vertical direction of the stud, and axial force is transmitted to the foundation.

  Moreover, the reinforcement construction method of the existing building of Claim 2 is a reinforcement construction method of the existing building of Claim 1, The said brace frame is joined to the said existing pillar facing the said stud, and the said stud. It is characterized by.

  The reinforcing method for an existing building according to claim 3 is the reinforcing method for an existing building according to claim 1, wherein two of the studs are provided between the existing pillars of the opening, and the brace frame is And a pair of the inter-columns.

  Moreover, the building of Claim 4 is comprised by the some existing pillar and beam installed on a foundation, and has an opening comprised by the said some existing pillar and beam, and a door or a wall in this opening In a multi-storey building in which the areas of each floor are divided by providing a space pillar formed by a steel material installed between the existing pillars constituting the opening of the upper floor, and a brace frame joined to the space pillar And a lower floor of the floor where the studs are installed, and other studs installed at the same position in the vertical direction of the studs, wherein the axial force is transmitted to the foundation. .

It is a side view which shows an example of the structure of a multilayer building. It is an enlarged view of the A part of FIG. It is a figure which shows the construction example of a stud. It is a figure which shows the construction example of a brace frame. It is a figure which shows the example of attachment of another reinforcement body, Fig.5 (a) is a figure which shows the construction example of a brace frame, FIG.5 (b) is a figure which shows the other example of attachment of a stud.

  Hereinafter, an embodiment of the present application will be described with reference to the accompanying drawings. The multilayer building 1 of this embodiment is a reinforced concrete structure building called RC structure, for example, and has a multilayer hierarchy. Further, in the present embodiment, an example in the case where it is necessary to reinforce the second-floor portion in a three-story structure building will be described.

  As shown in FIG. 1, the multi-layer building 1 is a three-story building, and is a frame structure 2 of a ramen structure formed using H-shaped steel. The frame 2 is assembled and installed on a foundation 5, and each floor (layer) is configured by a plurality of existing columns 3 extending in the vertical direction and beams 4 extending in the horizontal direction between the existing columns 3. Yes.

  As shown in FIG. 1, each floor has an opening 10 composed of some existing pillars 3a and beams 4a, and a face material that functions as a door or a wall is attached to the opening 10 although not shown. And divided into a plurality of regions (hereinafter referred to as “rooms”). As this face material, for example, plywood is used, but other building materials may be used. The opening 10 is provided with an opening 10a in which a corridor, a door, a window, or the like is disposed.

  As shown in FIGS. 1 and 2, the reinforcing method of the present invention is to provide a reinforcing body 30 in the opening 10 excluding the opening 10a. The reinforcing body 30 includes a stud 40 formed of a steel material, A brace frame 50 joined to the column 40.

  The inter-column 40 extends in the vertical direction so as to connect the upper and lower beams 4a, 4a to an arbitrary position between a pair of existing columns 3a, 3a (hereinafter referred to as "existing columns 3a") constituting the opening 10. Provided. In addition, except for the case where the stud 40 is installed on the lowest floor, the stud 40a is similarly installed at the same position in the vertical direction of the lower floor of the floor on which the stud 40 is installed, and the axial force reaches the foundation (foundation beam). Communicated. Specifically, as shown in FIG. 1, when a stud 40 is installed at a predetermined position on the second floor, another stud 40 a is also installed at the same position on the first floor vertically below the stud 40. . Further, when the stud 40 is installed at a predetermined position on the third floor, the other stud 40a is installed at the same position on the second floor and the first floor in the vertically lower direction of the stud 40.

  In addition, in the positional relationship between the studs 40 and the other studs 40a installed on the lower floor, it is preferable that they are straight in the vertical direction, but some shifts that are safe in calculation are allowed.

  As shown in FIG. 3, an H-shaped steel composed of a base body 10 a extending linearly and a side body 10 c having flange surfaces 10 b on both sides of the base body 10 a is suitably used for the stud 40. The H-shaped steel is disposed so as to act in the strong axis direction, and specifically, as illustrated in FIG. 1, the H-shaped steel is disposed so that the flange surface 10 b faces the column 3 direction of the multi-layer building 1.

  Further, as shown in FIG. 3, the stud 40 is fixed to the mortar 4 b and 4 b covering the beams 4 a and 4 a arranged above and below by the chemical anchor 9 through the grout 8.

  The connection between the stud 40 and the beam 4a is not limited to this configuration as long as the stud 40 and the beam 4a are attached so that the stud 40 and the beam 4a can work together and transmit the axial force.

  Moreover, as shown in FIG.1 and FIG.2, the brace frame 50 is comprised by the steel braces 51,52,53 and the frame (the 1st brace 56, the 2nd brace 57), and the intermediate | middle pillar 40 and the existing pillar 3a, And provided inside the frame constituted by the upper and lower beams 4a, 4a. The brace frame 50 of the present embodiment uses a brace structure called a mansard type. In addition to the brace structure of the bracing structure in which the steel brace is incorporated in the X shape or V shape, the K type and the diamond type are used. A brace structure such as a Y-type or a brace structure in which a frame is provided on the outer periphery of the steel brace may be used.

  The brace frame 50 of this embodiment is a Mansard-type brace structure having a frame, and a pair of vertical frames 51 are erected along the inter-column 40 or the existing column 3a, and are arranged along the upper beam 4a. An upper horizontal frame 52 is installed on the vertical frame 51, and is composed of lower horizontal frames 53 and 53 arranged so as to face each other from the lower end of each vertical frame along the lower beam 4a. A frame structure having a portal structure, a first brace 56 extending from a central portion of the upper horizontal frame 52 toward a lower end corner of each vertical frame 51, 51, and a gate shape from a substantially central portion of the first brace 56 And a second brace 57 extending toward the upper corner of the structure.

  As shown in FIGS. 2 and 4, the brace frame 50 is disposed with a gap 21 inside the upper and lower beams 4a and 4a, the inter-column 40, and the existing column 3a. As shown in FIG. 4, studs 61, 61... 61 are joined to the vertical frames 51, 51 and horizontal frames 52, 53, 53 at a predetermined interval around the vertical frames 51, 51 and horizontal frames 52, 53, 53. In this manner, chemical anchors 66, 66... 66 are placed on the upper and lower beams 4a, 4a and the mortar 4b, 3b covering the existing pillar 3a with a predetermined interval. In addition, a spiral bar 68 as a reinforcing bar is disposed in the gap 21 so as to cover the stud 61 and the chemical anchor 55, and then the mortar 70 is driven to fill the gap 21, and the brace frame 50 is used as a stud. And existing pillar 3a.

  As described above, the brace frame 50 is formed by rigidly joining the upper and lower beams 4a, 4a, the intermediary column 40, and the existing column 3a with chemical anchor bolts, mortar, or the like and attaching face materials to the front and back surfaces thereof. A portion of the opening 10 is blocked, leaving the portion 10a. .

  In addition, when the opening for a person to pass is required, as shown to Fig.5 (a), leaving the center part of the brace frame 50, attaching the face material 13 to another area | region, the opening part 58 is made. It may be formed.

  According to the reinforcing method of the present embodiment, the existing building can be easily and effectively reinforced without moving or narrowing the position or area of the opening 10a such as the door or the hallway before the reinforcing body 30 is provided. It is possible to increase physical strength.

  In addition, this reinforcement method can be attached to existing openings such as corridors and doors without requiring design changes such as floor plan changes, and prevents construction costs from rising and hinders traffic. Occurrence of problems such as outbreaks can be avoided.

  Next, other installation forms of the studs will be described.

  In the present embodiment, the above embodiment is such that one inter-column 40 is provided at an arbitrary position between the existing columns 3a and 3a, and the brace frame 50 is provided between the inter-column 40 and one of the existing columns 3a. On the other hand, the difference is that two intermediate columns 40A and 40B are provided at arbitrary positions between the existing columns 3a and 3a, and a brace frame 50A is provided between the intermediate columns 40b and 40c.

  Specifically, as shown in FIG. 5 (b), the reinforcing method of the present embodiment is to provide the reinforcing body 30 in the opening 10 except for the opening 10 a as in the above-described embodiment, and configure the opening 10. The two intermediate pillars 40A and 40B provided at an arbitrary position between the pair of left and right existing pillars 3a and 3a, and the brace frame 50A provided by being joined between the intermediate pillars 40A and 40B. The brace frame 50A uses a mansard-type brace structure, but is not limited to this form and may have any structure.

  Moreover, when installing the two studs 40A and 40B as in the present embodiment, the other studs 40a are arranged in the vertical direction of the studs 40A and 40B so that the axial force is transmitted to the lower floor. It is provided at the same position.

  According to this reinforcing method, it is possible to enhance the reinforcement of the building more than the reinforcing method of the above embodiment, and it is possible to further increase the physical strength of the building. Moreover, it is effective when the opening part 10b, such as a door, is needed separately.

  Next, an example of a reinforcement method in an existing building will be described with reference to FIGS.

  First, regarding the multi-layer building 1 that is an existing building, the installer determines the installation floor and the installation position of the stud 40 in consideration of the construction state of the opening 10 (including the opening 10a) and the like. The stud 40 is made of H-shaped steel and is arranged so as to act in the strong axis direction.

  In addition, as for the installation position of the stud 40, a place where another stud 40a can be installed at the same position on the lower floor is appropriately determined. In addition, in this embodiment, the intensity | strength as the whole building shall be enough by providing the reinforcement body 30 containing the stud 40 in the 2nd floor part. Therefore, the studs 40 and 40a are installed on the second floor and the first floor which is the lower floor, and the brace frame 50 is joined to the stud 40 installed on the second floor.

  Next, as shown in FIG. 3, the stud 40 is fixed to the mortar 4 b covering the upper and lower beams 4 a by the chemical anchor 9 through the grout 8.

  Next, as shown in FIG. 2, a brace frame 50 is installed between the stud 40 and the existing pillar 3a. As described above, the brace frame 50 is rigidly joined to the inter-column 40, the existing column 3a, and the upper and lower beams 4a and 4a, and although not shown, the front and back surfaces thereof are covered with a face material or the like, and the opening 10a is formed. The installation process of the reinforcing body 30 is finished after a wall surface process is performed in which a part of the opening 10 is blocked by the face material 13.

  As described above, the reinforcement method in the multi-layer building 1 of the present embodiment is configured by a plurality of existing columns 3 and beams 4 on the foundation 5, and an opening configured by some of the existing columns 3a and beams 4a. In the multi-layer building 1 in which the area of each floor is divided by providing doors and walls in the opening 10, a steel material is formed between the existing pillars 3 a and 3 a constituting the opening 10 in the upper floor. The intermediate pillar 40 is installed, and the brace frame 50 is joined to the intermediate pillar, and is a lower floor of the floor where the intermediate pillar 40 is installed, and another intermediate pillar 40a is installed at the same position in the vertical direction of the intermediate pillar 40. The axial force is transmitted to the foundation 5.

  According to the reinforcing method constructed in this way, the existing building can be easily reinforced while leaving a part of the opening 10a or the like with a simple configuration, and the safety of the multilayered building against earthquakes can be easily increased. It becomes possible.

  In addition, this embodiment is one form and is not limited to this form. For example, the steel member used in the multilayer building 1 of the present embodiment uses a steel frame generally referred to as H steel, but other forms may be substituted.

  Moreover, the building which can apply the construction method of this invention is not restricted to a reinforced concrete (RC) structure, A steel frame reinforced concrete (SRC) structure or a steel frame (S) structure may be used. For example, in the case of reinforced concrete, the studs and braces are indirectly joined by chemical anchor bolts and mortar, etc., using the same method as the SRC structure, but in the case of steel structures, the braces and studs are bolted, etc. Can be joined directly to a column or beam.

  Further, the outer frame material of the brace frame is essential for the SRC structure and the reinforced concrete structure, but the steel structure may be omitted.

  Further, although the inter-column 40 is a single column extending in the vertical direction, it may be divided into a plurality of pieces (for example, divided into two parts) and connected in consideration of carrying and easiness of construction. In this case, it is attached by a joint method (rigid joint) capable of bearing an axial force.

  Moreover, although the H-shaped steel is used suitably as the material of the stud 40, it may be a steel material that can bear an axial force, and may be a steel material such as other square pipes.

1 Multi-story building 3, 3a Existing column 4, 4a Beam 5 Foundation 10 Opening 40, 40a Interstitial column 50 Brace frame

Claims (4)

It is composed of a plurality of existing pillars and beams installed on the foundation, and has an opening composed of some of the existing pillars and beams. In the reinforcement method for existing buildings on multiple floors,
Between the existing pillars constituting the opening of the upper floor are installed studs made of steel, and brace frames are joined to the studs,
A reinforcement method for an existing building, which is a lower floor of the floor where the studs are installed, wherein another stud is installed at the same position in the vertical direction of the studs, and axial force is transmitted to the foundation.   The method for reinforcing an existing building according to claim 1, wherein the brace frame is joined to the existing column facing the intermediate column and the intermediate column. The two studs are provided between the existing pillars of the opening,
The method for reinforcing an existing building according to claim 1, wherein the brace frame is joined to the pair of studs. It is composed of a plurality of existing pillars and beams installed on the foundation, and has an opening composed of some of the existing pillars and beams. In a multi-storey building
An inter-column formed by a steel material installed between the existing columns constituting the opening of the upper floor,
A brace frame joined to the studs;
A floor below the floor on which the studs are installed, and another stud arranged at the same position in the vertical direction of the studs, wherein the axial force is transmitted to the foundation.

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