JP3981949B2 - Seismic reinforcement structure - Google Patents

Seismic reinforcement structure Download PDF

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Publication number
JP3981949B2
JP3981949B2 JP2002345758A JP2002345758A JP3981949B2 JP 3981949 B2 JP3981949 B2 JP 3981949B2 JP 2002345758 A JP2002345758 A JP 2002345758A JP 2002345758 A JP2002345758 A JP 2002345758A JP 3981949 B2 JP3981949 B2 JP 3981949B2
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Japan
Prior art keywords
new
existing
damper
pillar
column
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Expired - Fee Related
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JP2002345758A
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Japanese (ja)
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JP2004176460A (en
Inventor
大助 大藤
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清水建設株式会社
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Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seismic reinforcement structure for an existing building, and more particularly, to a seismic reinforcement structure that performs seismic reinforcement in the direction of a girder by a reinforcement frame newly provided on the wife side of the existing building.
[0002]
[Prior art]
As is well known, a so-called plate-like shape that is long in one direction (long side direction = digit direction) is generally used as a form of a mid-to-high-rise apartment building. As a general rule, the long side direction is a pure ramen structure with a ramen frame, and the other direction (short side direction = span direction) is a structure in which a ramen frame is combined with a seismic wall.
[0003]
By the way, in the building having the above structure in the form as described above, the seismic performance in the direction of girder, which is a pure ramen structure, is often insufficient compared to the span direction in which many seismic walls are provided. Some existing buildings may not be able to meet the current seismic standards, so such existing buildings will require seismic reinforcement in the direction of the beam.
[0004]
However, it is not practical to apply seismic reinforcement to existing buildings as described above, especially in the case of apartment buildings, because it is impossible to renovate while living. For example, there is a method of constructing a strong reinforcing frame on the outer wall in the longitudinal direction (on the south side where balconies are often provided in apartment buildings or the north side where common corridors are provided) and integrating it into existing buildings. It has been. However, it is not preferable to install a new outer peripheral frame on the balcony surface of the apartment building because lighting to each dwelling unit is greatly hindered, and construction noise and vibration for each dwelling unit cannot be ignored. However, the renovation work is still difficult.
[0005]
Therefore, for example, as shown in Patent Document 1, it has also been proposed to reinforce in the direction of the beam by providing a reinforcement frame on the wife side of an existing building. This is because a new frame with a layered structure of new pillars and new beams is installed on the wives side of the existing building, and the new frame and the existing building are connected using slabs etc. of each layer as a connecting means. A vibration control means is provided. [0006]
[Patent Document 1]
Japanese Patent Laid-Open No. 2000-145162
[Problems to be solved by the invention]
According to the earthquake-proof reinforcement structure shown in Patent Document 1, the rehabilitation does not impair the habitability, and the renovation work is limited to the wife side, so construction while living is possible, but at least four new installations Since a large new frame is required with pillars and many new beams installed on each layer between them, enough space is required on the wife side to install it, and such installation is naturally It is difficult to apply when space cannot be secured, or when it is necessary to remove or replace existing structures such as external stairs. In addition, since such a large-scale new frame is provided, a considerable work period and cost are required for the renovation work.
[0008]
From the above, although the reinforcement measure as shown in Patent Document 1 is effective, it has not been widely spread, and there has been a demand for the development of a technique that can perform reinforcement more simply and effectively.
[0009]
[Means for Solving the Problems]
In view of the above circumstances, the seismic reinforcement structure of the invention of claim 1 is a seismic reinforcement structure in which a reinforcement frame is newly installed on the wife side in order to perform seismic reinforcement in the direction of the crossing of the existing building. A new column erected on the outside of the existing outer peripheral column located on the outer wall of the wife side, a new beam constructed between the new column and the existing outer peripheral column, and the new column and the existing outer peripheral column A damping damper that is interposed in the form of a brace and operates by interlayer deformation of the existing building, and a horizontal brace that is laid between the new pillar and the outside wall surface of the existing building, The horizontal brace is installed between a reinforcing member fixed to the outer wall surface of the wife side of an existing building by a retrofitting anchor and the new pillar, and is buckled between an intermediate portion of the horizontal brace and the reinforcing member. A stop is provided.
[0011]
According to a second aspect of the present invention, the damping damper in the seismic strengthening structure of the first aspect of the present invention is a steel damper that has both ends fixed to the new column and the existing outer peripheral column to function as braces and yield in the axial direction. It is characterized by comprising a damper main body made of a strip-shaped steel plate that functions as a member, and a restraining member that is attached to the outside of the damper main body and restrains its out-of-plane buckling.
[0012]
The invention of claim 3 is characterized in that the new pillar in the earthquake-proof reinforcement structure of claim 1 or 2 is a concrete-filled steel pipe pillar having a structure in which the steel pipe is filled with concrete.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. The existing building 1 to be reinforced in the present embodiment is a 10-story plate-shaped apartment building in which the low-rise part is SRC and the high-rise part is RC. Since the seismic wall structure is used and the seismic performance in the direction of the girder is not sufficient as compared with the span direction, the seismic reinforcement structure of the present invention is applied to improve the seismic performance in the direction of the girder.
[0014]
As shown in FIGS. 1 to 2, the seismic reinforcement structure of the present invention performs seismic reinforcement in the beam direction by newly installing reinforcement frames 2 on both ends of the existing building 1. As shown in detail in FIG. 3 to FIG. 4, the reinforcing frame 2 is a single newly installed pillar 4 erected independently at a position outside the existing outer peripheral pillar 3 located on the end-side outer wall surface 1 a of the existing building 1. A new beam 5 installed between the newly installed column 4 and the existing outer peripheral column 3, a horizontal brace 6 installed between the newly installed column 4 and the wife side outer wall surface 1a, and an existing outer peripheral column 3 and newly installed It consists of a damping damper 7 which is interposed between the pillars 4 in the form of braces and operates by interlayer deformation of the existing building.
[0015]
In this embodiment, for example, a concrete-filled steel pipe column filled with concrete in a square steel pipe is adopted as the new column 4, and its column base is supported and erected by the new foundation 8 and the new pile 9. In addition, a steel beam such as a steel pipe is employed as the new beam 5 in the present embodiment, one end of which is bolted to the new column 4 via a gusset plate 10, and the other end is a steel frame 3 a of the existing outer peripheral column 3. The bolt is fastened to the gusset plate 11 which is rolled out and welded thereto. Moreover, said horizontal brace 6 consists of steel materials, such as H-shaped steel, for example, and is constructed between the reinforcing material 14 which consists of channel steel materials etc. which were fixed to the wife side outer wall surface 1a with the retrofit anchor 13, and the new pillar 4, Between the intermediate portion of the horizontal brace 6 and the reinforcing member 14, two buckling stoppers 15 made of an angle material or the like are provided. The horizontal brace 6 and the buckling stopper 15 prevent the new pillar 4 from extending in the span direction. The steady rest is made.
[0016]
A steel damper (so-called unbonded brace damper) having the structure shown in FIG. 5 is adopted as the vibration damper 7 in the present embodiment, and a zigzag shape is generally formed between the newly installed column 4 and the existing outer peripheral column 3 as shown in FIG. Is provided.
[0017]
The damping damper 7 includes a damper body 20 made of a strip-like flat steel plate and a restraining member 21 mounted on the outside thereof. The damper main body 20 has one end fastened to the new pillar 4 via the gusset plate 10 and the other end bolted to the existing outer peripheral pillar 3 via the gusset plate 11. 1 functions as a brace for preventing interlaminar deformation, and has a yielding portion 20a with a narrowed width dimension formed at the center thereof. When a predetermined axial force is applied, the yielding portion 20a yields. It is plastically deformed, thereby absorbing vibration energy and obtaining a seismic control effect. In addition, as a material of the damper main body 20, low-yield point steel can be suitably used in addition to ordinary steel, and in any case, the material, thickness, length, shape of the yielding part, etc. of the damper main body 20 are set. By doing so, a desired vibration control effect can be obtained.
[0018]
The restraining member 21 includes a pair of channel steel members 23 that sandwich the damper main body 20 from both sides via the cushioning material 22 and a pair of bolts that are attached to the flanges of the channel steel materials 23 and coupled to both the channel steel materials 23. The restraining member 21 restrains the in-plane deformation and the out-of-plane deformation and allows the buckling to be surely prevented. Reference numeral 25 denotes a spell bolt passing through the channel steel material 23 and the damper main body 20, 26 and 27 denote vertical and horizontal ribs for stiffening attached to the outer surface of the channel steel material 23, and 28 denotes both ends of the damper main body 20. A rib plate for fastening to the gusset plates 10 and 11.
[0019]
According to the above-mentioned seismic reinforcement structure, by providing the reinforcement frames 2 on both sides of the ramen frame in the transverse direction where the earthquake resistance performance is not sufficient, the reinforcement frames 2 function in the same way as the buttress, and the reinforcement effect is obtained. The deformation in the direction of the 1 digit is effectively suppressed, and the vibration during the earthquake is reduced and attenuated by the vibration control damper 7 incorporated in the reinforcing frame 2, and an excellent vibration control effect is obtained.
In particular, the reinforcing frame 2 has a horizontal brace 6 erected between the new pillar 4 and the wife side outer wall surface 1 a of the existing building 1, and the horizontal brace 6 is formed on the wife side outer wall surface 1 a of the existing building 1. Since the reinforcing material 14 fixed by the retrofitting anchor 13 and the new pillar 4 are installed, and further, a buckling stopper 15 is provided between the intermediate portion of the horizontal brace 6 and the reinforcing material 14. A triangular horizontal frame is naturally formed by the reinforcing member 14, the horizontal brace 6, the buckling stopper 15 and the new beam 5, so that the new pillar 4 is reliably prevented from swinging in the span direction.
[0020]
And the above-mentioned seismic reinforcement structure is such that a simple reinforcement frame 2 is provided on the wife side in a form in which the ramen frame in the crossing direction is extended to both sides by one span, so that the comfortability is impaired due to the repair. It does not require any installation space, and it can be carried out at low cost in a short period of time while renovation work is resident, so it is particularly suitable as an application to an apartment building.
[0021]
Although the embodiment of the present invention has been described above, the above embodiment is merely an example, and the present invention is not limited to the above embodiment. For example, various modifications and applications as listed below are possible. It is.
[0022]
In the above embodiment, the reinforcing frame 2 is provided for the corner pillars located at the corners of the existing building. However, the reinforcing frame 2 is not limited to the corner pillars but is provided for the outer peripheral pillars located on the outer wall of the wife side. What is necessary is just to provide, and the installation position of the reinforcement frame 2 should just be set in consideration of conditions, such as the form of the existing building 1, the existing frame type of a crossing direction, and site | part shape.
[0023]
In addition, the structure and form of the reinforcing frame 2 are as follows. A horizontal brace 6 is erected and a buckling stopper 15 is provided between the horizontal brace 6 and the reinforcing member 14, and the reinforcing member 14, the horizontal brace 6 and the buckling stopper 15 constitute a triangular horizontal frame. As long as it is designed to obtain a desired reinforcing effect for the existing building 1 and to obtain a desired damping effect by the damping damper 7, it is optional. In the above embodiment, a concrete-filled steel pipe column is used as the new column 4 and a steel beam is used as the new beam 5, so that there is an advantage that sufficient rigidity can be secured with a small cross section and the workability is excellent. Other structures can be adopted as the new pillar 4 and the new beam 5 .
[0024]
As the damping damper 7, the unbonded brace damper adopted in the above embodiment is optimal. However, any other damping damper can be used as long as it can be installed in the form of braces on the reinforcing frame 2 and a desired damping effect can be obtained. Adopting a structure and type of damping damper is not an obstacle. Of course, the installation position and the number of installed dampers may be arbitrarily designed so as to obtain a desired damping effect.
[0025]
In the above-described embodiment, the new foundation 8 and the new pile 9 for supporting the new pillar 4 are provided, but the pile can be omitted depending on the ground condition or the like. In addition, when installing a pile, its construction and construction method are arbitrary, but if a rotary buried steel pipe pile is used, construction without noise, vibration and no soil is possible and large heavy machinery is not required. When renovation work is carried out while living, it is preferable to adopt it.
[0026]
In the above embodiment, since the structure of the existing building 1 to be reinforced is SRC structure in the low-rise part and RC structure in the high-rise part, the steel frame 3a of the existing outer peripheral column 3 is rolled out in the low-rise part and the gusset plate 11 In the high-rise part, the reinforcing member 14 is fixed to the wife side outer wall surface 1a by using the retrofitting anchor 13, but the damping damper 7, the newly installed beam 5, or the horizontal brace 6 is attached to the existing building 1. What is necessary is just to set the specific structure for fixing arbitrarily according to the structure and form of the existing building 1. In any case, when performing construction while living, it is preferable to adopt a construction method of low noise and low vibration as much as possible for the construction or anchor construction for the existing building 1.
[0027]
In addition, although the said embodiment is an example at the time of targeting at a 10-story apartment house building, the present invention has various uses and scales on condition that a small space for installing the reinforcing frame 2 can be secured. Needless to say, it can be widely applied to buildings of form.
[0028]
【The invention's effect】
The invention according to claim 1 is a new pillar erected on the wife side of an existing building, a new beam erected between the new pillar and the existing outer peripheral pillar, and a space between the new pillar and the existing outer peripheral pillar. As the structure is provided with a reinforced frame consisting of a seismic damper, the reinforced frame functions as a buttress, providing an excellent reinforcement effect, effectively suppressing deformation of the existing building, and the seismic damper provides an earthquake. The vibration of the time is reduced and damped, and an excellent seismic control effect is obtained. In addition, an extremely simple reinforcing frame in which the frame in the existing beam direction is extended to both sides by one span is only provided on the wife side. Therefore, there will be no loss of habitability due to renovation, no need for installation space, and renovation work can be carried out in a short period of time while using the building. Apply to It is the most suitable for.
In addition, a horizontal brace is installed between the new pillar and the wife's outer wall surface of the existing building, and the horizontal brace is installed between the reinforcement member fixed to the wife's outer wall surface of the existing building with a retrofitting anchor and the new pillar. In addition, since a buckling stopper is provided between the middle part of the horizontal brace and the reinforcing material, a triangular horizontal frame is naturally formed by the reinforcing material, horizontal brace, buckling stopper and the new beam. There is an advantage in that the steady-state effect in the span direction with respect to the column can be surely obtained and the rigidity of the reinforcing frame can be easily secured.
[0030]
The invention according to claim 2 is a damper body made of a strip-shaped steel plate that functions as a brace and functions as a brace and also functions as a steel damper by yielding in the axial direction, and a surface of the damper body that is mounted on the outside thereof Since a structure composed of a restraining member that restrains the outer buckling is adopted, an excellent reinforcing effect and a vibration control effect can be obtained together.
[0031]
In the invention of claim 3 , since the concrete-filled steel pipe column having a structure in which the steel pipe is filled with concrete is adopted as the new column, sufficient rigidity can be obtained with a small cross section.
[Brief description of the drawings]
FIG. 1 is a front view showing an outline of a seismic reinforcement structure according to an embodiment of the present invention.
FIG. 2 is a plan view of the same.
FIG. 3 is a detailed view of the main part of the same.
FIG. 4 is a detailed view of the main part of the same.
FIG. 5 is a diagram showing an example of a vibration damper.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Existing building 1a Wife side outer wall surface 2 Reinforcement frame 3 Existing outer periphery pillar 3a Steel frame 4 New pillar 5 New beam 6 Horizontal brace 7 Damping damper 8 New foundation 9 New pile 10, 11 Gusset plate 13 Retrofitting anchor 14 Reinforcement 15 Buckling Stop 20 Damper Main Body 20a Yield Part 21 Restraint Member 22 Buffer Material 23 Channel Steel Material 24 Cover Plate 25 Spell Bolt 26 Vertical Rib 27 Horizontal Rib 28 Rib Plate

Claims (3)

  1. A seismic reinforcement structure that newly installs a reinforcement frame on the wife side in order to perform seismic reinforcement in the direction of the beam of existing buildings,
    The reinforcement frame is a new column that is erected on the outside of the existing outer peripheral column located on the outer wall surface of the wife side of the existing building, a new beam that is installed between the new column and the existing outer peripheral column, and a new installation A seismic damper that is interposed between the pillar and the existing outer peripheral pillar in the form of a brace and operates by interlayer deformation of the existing building, and a horizontal brace that is laid between the new pillar and the outer wall of the existing building And having
    The horizontal brace is installed between a reinforcing member fixed to the outer wall surface of the wife side of an existing building by a retrofitting anchor and the new pillar, and is buckled between an intermediate portion of the horizontal brace and the reinforcing member. A seismic reinforcement structure characterized by a stop .
  2. The damping damper consists of a damper body consisting of a strip-shaped steel plate whose ends are fixed to the newly installed column and the existing outer peripheral column, functioning as a brace and yielding in the axial direction, and also functioning as a steel damper, and the damper body The seismic reinforcement structure according to claim 1, comprising a restraining member that is attached to the outside of the base plate and restrains out-of-plane buckling.
  3. The seismic reinforcement structure according to claim 1 or 2 , wherein the new pillar is a concrete-filled steel pipe pillar having a structure in which the steel pipe is filled with concrete.
JP2002345758A 2002-11-28 2002-11-28 Seismic reinforcement structure Expired - Fee Related JP3981949B2 (en)

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Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4800835B2 (en) * 2005-06-30 2011-10-26 株式会社i2S2 Multi-layer seismic control device
JP5731750B2 (en) * 2010-01-05 2015-06-10 章 和田 building
JP2011163039A (en) * 2010-02-12 2011-08-25 Kumagai Gumi Co Ltd Building
JP5586982B2 (en) * 2010-02-17 2014-09-10 株式会社熊谷組 building
JP2012167524A (en) * 2011-02-17 2012-09-06 Miyazono Seisakusho:Kk Aseismatic reinforcement structure for existing building
JP5946165B2 (en) * 2011-05-09 2016-07-05 株式会社明興コンサルタンツ Seismic reinforcement structure
JP5620883B2 (en) * 2011-05-23 2014-11-05 大成建設株式会社 Damping structure
JP2012117364A (en) * 2012-01-20 2012-06-21 Kajima Corp Vibration control bridge pier structure
KR101382914B1 (en) * 2012-12-27 2014-04-10 재단법인 포항산업과학연구원 Seismic reinforcement device
KR101319527B1 (en) * 2013-04-08 2013-10-21 이인영 Seismic retrofit structure for building remodeling and seismic retrofit method using the same
JP5916687B2 (en) * 2013-11-14 2016-05-11 三菱重工業株式会社 Renovation method of steady rest structure
JP5759608B1 (en) 2014-12-08 2015-08-05 新日鉄住金エンジニアリング株式会社 Reinforcement structure of existing building
JP6006352B2 (en) * 2015-02-23 2016-10-12 鹿島建設株式会社 Seismic control pier structure
KR101861484B1 (en) * 2017-07-13 2018-05-28 (주)테크스퀘어 Earthquake resistant reinforcing construction of existing building
CN109736426A (en) * 2019-01-16 2019-05-10 浙江至诚建设有限公司 The overload protection building element of device is built in a kind of room

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