JP4247496B2 - Seismic reinforcement structure - Google Patents

Seismic reinforcement structure Download PDF

Info

Publication number
JP4247496B2
JP4247496B2 JP2005093358A JP2005093358A JP4247496B2 JP 4247496 B2 JP4247496 B2 JP 4247496B2 JP 2005093358 A JP2005093358 A JP 2005093358A JP 2005093358 A JP2005093358 A JP 2005093358A JP 4247496 B2 JP4247496 B2 JP 4247496B2
Authority
JP
Japan
Prior art keywords
seismic
frame
new
existing
main frame
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2005093358A
Other languages
Japanese (ja)
Other versions
JP2006274613A (en
Inventor
佳久 北村
政宏 浅井
芳雄 遠藤
孝一 堀部
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shimizu Corp
Original Assignee
Shimizu Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shimizu Corp filed Critical Shimizu Corp
Priority to JP2005093358A priority Critical patent/JP4247496B2/en
Publication of JP2006274613A publication Critical patent/JP2006274613A/en
Application granted granted Critical
Publication of JP4247496B2 publication Critical patent/JP4247496B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Vibration Prevention Devices (AREA)

Description

本発明は既存建物を対象とする耐震補強構造、特に妻側に耐震補強架構を新設することで桁行方向の耐震補強を行うようにした耐震補強構造に関する。   The present invention relates to a seismic reinforcement structure for an existing building, and more particularly, to a seismic reinforcement structure in which a seismic reinforcement structure is newly installed on a wife side to perform seismic reinforcement in the direction of the beam.

周知のように、中高層の集合住宅建物の形態としては一方向（長辺方向＝桁行方向）に長いいわゆる板状形と称される形態が一般的であり、そのような形態の建物の構造形式としては、長辺方向をラーメン架構による純ラーメン構造、他方向（短辺方向＝スパン方向）をラーメン架構に耐震壁を併用した構造とすることが一般的である。   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.

ところで、上記のような形態で上記のような構造とされる建物では、耐震壁を多く設けたスパン方向に比較して純ラーメン構造とされる桁行方向の耐震性能が充分でない場合が多く、過去に建設されたものでは現在の耐震基準を満足し得ない場合もあるので、そのような既存建物に対しては桁行方向の耐震補強が必要とされる。   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.

既存建物に対する上記のような耐震補強を既存建物の内部に対して行うことは、特に集合住宅建物の場合には居住しながらの改修工事が不可能であるので現実的ではないから、一般的には長手方向の外壁面（集合住宅建物ではバルコニーが設けられる南面、あるいは共用廊下が設けられる北面であることが多い）に頑強な補強フレームを新設して既存建物に一体化するという手法が考えられている。しかし、集合住宅建物のバルコニー面に対して新たな外周フレームを設けることは各住戸への採光が大きく阻害されてしまうので好ましくないし、各住戸に対する工事騒音や振動も無視し得ないので、居住しながらの改修工事はやはり困難である。   In general, it is not practical to apply seismic reinforcement to an existing building as described above, especially in the case of apartment buildings, because it is impossible to renovate while living. For example, a method of constructing a strong reinforcement frame on the outer wall in the longitudinal direction (in many cases, the south side where balconies are provided or the north side where shared corridors are provided) is integrated into existing buildings. ing. 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.

そのため、たとえば特許文献１に示されるように、既存建物の妻側に補強フレームを設けることで桁行方向の補強を行うことも提案されている。これは、新設柱と新設梁と制震ダンパーからなる補強フレームを既存建物の両妻側に設けることにより、それらの補強フレームをバットレスとして機能せしめて既存建物の変形を抑制し、かつ制震ダンパーにより地震時の振動を軽減し抑制して優れた制震効果が得られるというものである。これによれば、補強フレームを両妻側に設けるだけなので居住しながらの改修が可能であるし、さしたる設置スペースも必要とせず、改修後も居住性が損なわれることもないので、特に集合住宅建物に適用するものとして有効であると考えられている。
特開２００４−１７６４６０号公報 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 the reinforcement frame consisting of the new pillar, the new beam, and the damping damper is installed on both ends of the existing building, so that these reinforcement frames function as buttresses and the deformation of the existing building is suppressed, and the damping damper This reduces the vibration during the earthquake and suppresses it, resulting in an excellent seismic control effect. According to this, it is possible to renovate while living because only the reinforcement frame is provided on both wives side, and it does not require a proper installation space, and the residential property will not be impaired after the renovation, so it is especially a collective housing It is considered effective as an application to buildings.
JP 2004-176460 A

しかし、特許文献１に示される耐震補強構造は既存建物の両妻側にそれぞれ補強フレームを設けることを前提としており、したがって両妻側に十分な設置スペースが確保できないといった制約から補強フレームを片側の妻側にしか設置できない場合には、既存建物全体に対する十分な補強効果や制震効果が得られず、その点で改善の余地があった。   However, the seismic reinforcement structure shown in Patent Document 1 is based on the premise that reinforcement frames are provided on both ends of the existing building. Therefore, the reinforcement frame is installed on one side due to the restriction that sufficient installation space cannot be secured on both ends. If it can only be installed on the wife side, sufficient reinforcement and seismic control effects cannot be obtained for the entire existing building, leaving room for improvement.

上記事情に鑑み、本発明は十分な耐震補強効果が得られるより有効な耐震補強構造を提供することを目的としている。   In view of the above circumstances, an object of the present invention is to provide a more effective seismic reinforcement structure capable of obtaining a sufficient seismic reinforcement effect.

本発明は、既存建物の桁行方向の耐震補強を行うためにその妻側に耐震補強架構を新設した耐震補強構造であって、前記耐震補強架構は、既存建物の桁行方向の既存架構を妻側に延長した形態の桁行方向のラーメン架構からなる主架構と、該主架構をスパン方向から補剛する副架構と、前記主架構に組み込んだ制震ダンパーからなり、前記主架構は、少なくとも一対２本の新設柱と該新設柱間の各層に架設された新設梁とを主体として、一方の新設柱を既存建物の妻面に設けられている既存柱に対して全高にわたって一体に緊結してなり、前記副架構は、前記主架構における一方の新設柱に一端が接合された各層のスパン方向の新設梁と、該新設梁と前記主架構との間に架設された水平ブレースとを有して、前記新設梁を既存建物の妻面の各層に設けられている既存梁の側部に対して全長にわたって一体に緊結してなり、前記制震ダンパーを、前記主架構における新設柱とそれらの間の各層に架設した桁行方向の新設梁との間の各層にブレースの形態で架設してなることを特徴とする。   The present invention provides a seismic retrofit structure in which a seismic retrofit structure is newly installed on the side of the wife in order to perform seismic retrofit of the existing building. A main frame composed of a ramen frame extending in the beam direction, a sub-frame that stiffens the main frame from the span direction, and a vibration control damper incorporated in the main frame, wherein the main frame is at least a pair of two. The new pillar of the book and the new beam erected in each layer between the new pillars are mainly connected to the existing pillar on the wife's face of the existing building. The sub frame includes a new beam in the span direction of each layer, one end of which is joined to one new column in the main frame, and a horizontal brace installed between the new beam and the main frame. , The new beam to each of the wife face of the existing building The seismic damper is connected to the side of the existing beam provided on the entire length, and the seismic damper is connected to the new column in the main frame and the new beam in the column direction installed in each layer between them. It is characterized by being constructed in the form of braces on each layer in between.

本発明においては、制震ダンパーを各層に２基ずつハ状または逆ハ状をなすように桁行方向に並べて架設することが好ましく、その場合には、各層の制震ダンパーの向きを１層ごとに交互に逆向きとすることにより２層ごとに４基の制震ダンパーをＸ状に架設することが好ましい。   In the present invention, it is preferable to install two dampers on each layer side by side in a row direction so as to form a C shape or an inverted C shape. In that case, the direction of the dampers in each layer is set for each layer. It is preferable that four seismic dampers are installed in an X shape for every two layers by making the directions reverse to each other.

本発明においては、既存建物の妻側に既存の階段室等の突出部がある場合、あるいは階段室等の突出部を新設する場合には、その突出部の架構と主架構との間に副架構の一部としての水平ブレースを架設することが考えられる。   In the present invention, when there is a projecting part such as an existing staircase on the wife side of an existing building, or when a new projecting part such as a staircase is newly installed, the substructure is between the frame of the projecting part and the main structure. It is conceivable to install a horizontal brace as part of the frame.

本発明における制震ダンパーとしては、ブレースとして機能するとともに軸方向に降伏して鋼材ダンパーとしても機能する帯板状の鋼板からなるダンパー本体と、該ダンパー本体の外側に装着されてその座屈を拘束する拘束部材からなるブレースダンパーが好適に採用可能である。   As the damping damper in the present invention, a damper main body made of a strip-shaped steel plate that functions as a brace and yields in the axial direction and also functions as a steel damper, and is attached to the outside of the damper main body and buckled. A brace damper including a restraining member for restraining can be suitably used.

本発明によれば、耐震補強架構を主架構と副架構とにより構成し、主架構における新設柱と副架構における新設梁をそれぞれ既存建物における既存柱と既存梁に対して全長にわたって一体に緊結したので、耐震補強架構がバットレスと同様に機能して既存建物の桁行方向の変形が有効に抑制されるとともに、耐震補強架構に組み込んだ制震ダンパーによって地震時の振動が効果的に抑制かつ減衰され、それにより優れた耐震補強効果と制震効果が得られる。   According to the present invention, the seismic reinforcement frame is composed of the main frame and the sub frame, and the new column and the new beam in the main frame are integrally bonded to the existing column and the existing beam in the existing building, respectively. Therefore, the seismic reinforcement frame functions in the same way as a buttress, and the deformation of the existing building in the direction of the beam is effectively suppressed, and the vibration during the earthquake is effectively suppressed and attenuated by the seismic damper incorporated in the earthquake resistance frame. As a result, excellent seismic reinforcement and seismic control effects can be obtained.

特に、各層にそれぞれ２基の制震ダンパーをハ状もしくは逆ハ状に設置することにより、さしたるスペースを必要とせずに多数の制震ダンパーを支障なく設置でき、耐震補強架構を片側の妻側にのみ設置する場合であっても既存建物全体に対する優れた制震効果が得られる。その場合、制震ダンパーを全体として２層ごとのＸ状に架設することで、それらの交点の位置に設けることが通常である中間柱を省略することが可能であるし、デザイン的にも大胆で好ましい外観が得られる。   In particular, by installing two seismic dampers in each layer in a C-shape or reverse C-shape, a large number of seismic dampers can be installed without hindrance, and the seismic reinforcement frame can be installed on one wife side. Even if it is installed only in the building, it is possible to obtain an excellent seismic control effect for the entire existing building. In that case, by installing the damping damper as a whole in an X shape for every two layers, it is possible to omit the intermediate pillars that are usually provided at the intersections, and it is also bold in design. A preferable appearance can be obtained.

また、既存あるいは新設の階段室等の突出部の架構を副架構の一部として利用することにより、主架構のスパン方向の剛性を合理的に確保することができる。   In addition, by using the frame of the projecting portion such as an existing or new staircase as a part of the sub frame, the rigidity in the span direction of the main frame can be reasonably ensured.

さらに、制震ダンパーとしてブレースダンパーを採用することにより、主架構に対してブレースの形態で容易に設置でき、かつ優れた補強効果と制震効果を併せて得ることができる。   Furthermore, by adopting the brace damper as the seismic damper, it can be easily installed in the form of braces with respect to the main frame, and an excellent reinforcing effect and a seismic effect can be obtained.

本発明の一実施形態を図１〜図６を参照して説明する。本実施形態における補強対象の既存建物は、南面側がバルコニー、北面側が共用廊下とされ、中間部において雁行してはいるが全体として板状の形態とされた地上１０階建ての集合住宅建物であって、その構造は鉄筋コンクリート造のラーメン構造を基本として桁行方向が純ラーメン構造、スパン方向が耐震壁構造とされたものであり、スパン方向に較べて桁行方向の耐震性能が充分ではないことから、桁行方向の耐震性能を向上させるべく本発明の耐震補強構造を適用するものである。   An embodiment of the present invention will be described with reference to FIGS. The existing building to be reinforced in this embodiment is a 10-story apartment building with a balcony on the south side and a shared corridor on the north side, and has a plate shape as a whole, although it is coasting in the middle. The structure is based on a reinforced concrete ramen structure and the girder direction is a pure ramen structure, and the span direction is a seismic wall structure, and the seismic performance in the girder direction is not sufficient compared to the span direction. The seismic reinforcement structure of the present invention is applied in order to improve the seismic performance in the beam direction.

なお、このような雁行部を有する形態の建物では、雁行部の両側が構造的には実質的にそれぞれ独立の建物として挙動するものであることから、本実施形態では双方の妻側にそれぞれ耐震補強架構１（１Ａ、１Ｂ）を設けるものとしている。それらの耐震補強架構１Ａ、１Ｂは基本的には同様の構造のものであるが、後述のように東側（図示右側）に設けた耐震補強架構１Ｂは西側（図示左側）に設けた耐震補強架構１Ａに較べてやや簡略化されたものとなっているので、以下では耐震補強架構１Ａについて詳細に説明し、耐震補強架構１Ｂについてはそれと同一構成要素に同一符号を付して説明を簡略化する。   In addition, in a building having such a lame portion, both sides of the lame portion behave substantially as independent buildings structurally. The reinforcing frame 1 (1A, 1B) is provided. The seismic reinforcement frames 1A and 1B basically have the same structure, but the seismic reinforcement frame 1B provided on the east side (right side in the figure) is the seismic reinforcement frame provided on the west side (left side in the figure) as described later. Since it is somewhat simplified as compared with 1A, the following will describe the seismic reinforcing frame 1A in detail, and for the seismic reinforcing frame 1B, the same components will be assigned the same reference numerals to simplify the description. .

耐震補強架構１Ａは、既存建物の南面側（バルコニー側）の桁行方向の既存架構を妻側に延長した形態の主架構２と、その背後側に設けられた副架構３と、主架構１に組み込まれた制震ダンパー４からなるものである。   The seismic strengthening frame 1A consists of a main frame 2 in the form in which the existing frame in the beam direction on the south side (balcony side) of the existing building is extended to the wife side, a sub frame 3 provided behind the main frame 2, and a main frame 1 It consists of a built-in seismic damper 4.

図３〜図４に詳細を示すように、主架構２は鉄骨鉄筋コンクリート造の一対２本の新設柱５（５ａ、５ｂ）と、それら新設柱５ａ、５ｂ間の各層に架設された桁行方向の鉄骨造の新設梁６とによる一方向ラーメン架構を主体とするものであり、それら２本の新設柱５ａ、５ｂのうち既存建物側の新設柱５ａは既存建物の妻面に設けられている鉄筋コンクリート造の既存柱７に対して多数の後施工アンカー８により全長にわたって一体に緊結され、他方の新設柱５ｂは新設基礎９（図１参照）から自立する独立柱として設置されている。なお、後施工アンカー８は施工時に大きな騒音や振動を発生するものではないし、新設柱５ａと既存柱７とを簡単な手法で確実に一体化できるものであるが、新設柱５ａの施工に際しては既存柱７の表層部に目荒らしを行うことでそれらの一体化強度をより高めることができる。   As shown in detail in FIGS. 3 to 4, the main frame 2 is composed of a pair of two new columns 5 (5 a, 5 b) made of steel reinforced concrete, and in the direction of the columns installed between the new columns 5 a, 5 b. The main structure is a one-way rigid frame with a steel-framed new beam 6, and of these two new columns 5a and 5b, the new column 5a on the existing building side is reinforced concrete provided on the end face of the existing building. The existing pillar 7 is integrally fastened with a number of post-installed anchors 8 over the entire length, and the other new pillar 5b is installed as an independent pillar independent from the new foundation 9 (see FIG. 1). It should be noted that the post-installed anchor 8 does not generate a large noise or vibration at the time of construction, and the new pillar 5a and the existing pillar 7 can be reliably integrated by a simple method, but when the new pillar 5a is constructed, By performing roughening on the surface layer portion of the existing pillar 7, their integrated strength can be further increased.

上記の主架構２はそれ自体がラーメン架構であって桁行方向の水平剛性を十分に確保できるが、スパン方向の剛性はそれ自体では確保し難いことから、そのために主架構２の背後側には副架構３が付設されている。本実施形態における副架構３は、図４〜図５に示すように、一端が上記の新設柱５ａに接合された鉄骨鉄筋コンクリート造のスパン方向の新設梁１１と、その新設梁１１の中間部と上記主架構２における桁行方向の新設梁６の中間部との間に斜めに架設された鉄骨造の水平ブレース１２とを主体としている。新設梁１１は、上記の新設柱５ａと同様に、既存建物の妻面各層に設けられているスパン方向の既存梁１３の側部に対して多数の後施工アンカー１４により全長にわたって一体に緊結されており、その新設梁１１の施工に際しては既存梁１３の表層部に目荒らしを行ってそれらを確実に一体化させると良い。   The main frame 2 described above is a rigid frame frame and can sufficiently secure horizontal rigidity in the direction of the beam. However, it is difficult to secure the rigidity in the span direction by itself. A sub-frame 3 is attached. As shown in FIGS. 4 to 5, the sub-frame 3 in the present embodiment includes a steel-framed reinforced concrete span-direction new beam 11 having one end joined to the new column 5 a, and an intermediate portion of the new beam 11. The main frame 2 is mainly composed of a horizontal brace 12 made of steel frame that is obliquely installed between the main beam 2 and an intermediate portion of the new beam 6 in the direction of the beam. Similar to the above-described new pillars 5a, the new beams 11 are integrally joined to the side portions of the existing beams 13 in the span direction provided in each layer of the end face of the existing building by a large number of post-installed anchors 14 over the entire length. When the new beam 11 is constructed, it is preferable that the surface layer portion of the existing beam 13 is roughed so as to be surely integrated.

加えて、本実施形態では図２に示すように妻面より突出する状態で既存の階段室１５が設けられていることから、その階段室１５の架構と主架構２および副架構３との間にも水平ブレース１６を架設することにより、それら水平ブレース１６および階段室１５の架構を副架構３の一部として利用している。その場合、水平ブレース１６を主架構２に対してできるだけ直交するように架設することにより主架構２に対する補剛効果が効果的に得られる。   In addition, in the present embodiment, as shown in FIG. 2, the existing staircase 15 is provided so as to protrude from the wife surface, so that the space between the frame of the staircase 15 and the main frame 2 and the subframe 3 is not provided. In addition, by installing the horizontal braces 16, the horizontal braces 16 and the frame of the staircase 15 are used as a part of the sub-frame 3. In that case, a stiffening effect on the main frame 2 can be effectively obtained by installing the horizontal brace 16 so as to be as orthogonal as possible to the main frame 2.

そして、図１および図３に示すように、上記の主架構２には多数の制震ダンパー４が全体としてＸ状をなすように組み込まれている。すなわち、図３に示すように、主架構２における双方の新設柱５ａ，５ｂと各層の新設梁６とにより囲まれるフレームの内側には、各層に２基の制震ダンパー４がハ状あるいは逆ハ状をなすように配置され、それらの一端部が新設柱５ａ，５ｂと新設梁６との接合部にガセットプレート２０を介して接合され、他端部が直上階または直下階の新設梁６の中央部に対してガセットプレート２１を介して接合されている。そして、各層の制震ダンパー４の向きを１層ごとに交互に逆向きとすることにより、２層ごとに４基の制震ダンパー４がガセットプレート２１を中心としてその周囲にＸ状をなすように架設されたものとなっている。本実施形態では、図１に示すように各層の２基ずつの制震ダンパー４が奇数階では逆ハ状に架設され、偶数階ではハ状に架設されることにより、２層分の４本ずつの制震ダンパー４が全体として５段のＸ状をなすように架設されている。   As shown in FIGS. 1 and 3, a large number of damping dampers 4 are incorporated in the main frame 2 so as to form an X shape as a whole. That is, as shown in FIG. 3, two seismic dampers 4 on each layer are in the shape of a cage or reverse on the inner side of the frame surrounded by both the new pillars 5 a and 5 b and the new beam 6 in each layer in the main frame 2. They are arranged so as to form a C-shape, one end of which is joined to the joint between the new pillars 5a, 5b and the new beam 6 via the gusset plate 20, and the other end is the new beam 6 on the upper floor or the lower floor. It is joined to the central part of the through a gusset plate 21. Then, the direction of the damping dampers 4 of each layer is alternately reversed in every layer, so that the four damping dampers 4 form an X shape around the gusset plate 21 around every two layers. It has been built in. In this embodiment, as shown in FIG. 1, two damping dampers 4 for each layer are installed in an inverted C shape on the odd floors and in a C shape on the even floors, so that four pieces for two layers are provided. Each damping damper 4 is constructed so as to form a 5-stage X-shape as a whole.

本実施形態では、制震ダンパー４として図６に示す構造のいわゆるブレースダンパーが採用されている。この制震ダンパー４は帯板状の平鋼板からなるダンパー本体３０と、その外側に装着されて座屈を拘束する拘束部材３１からなる。ダンパー本体３０は上記のようにその両端がそれぞれガセットプレート２０，２１を介して主架構２に対してボルト締結されることによりこれ自体がブレースとして機能するものであるが、その中央部には幅寸法が狭められた降伏部３０ａが形成されていて、所定の軸力を受けた際には降伏部３０ａが降伏して塑性変形して鋼材ダンパーとして機能し、それにより振動エネルギーを吸収して優れた制震効果が得られるものとなっている。なお、ダンパー本体３０の素材としては、普通鋼の他、低降伏点鋼が好適に採用可能であるし、いずれにしてもダンパー本体３０の材質や厚み、長さ、降伏部の形状等を設定することで所望の制震効果を得ることができるものである。   In the present embodiment, a so-called brace damper having a structure shown in FIG. The damping damper 4 includes a damper main body 30 made of a strip-like flat steel plate, and a restraining member 31 that is attached to the outside and restrains buckling. The damper body 30 functions as a brace by being bolted to the main frame 2 via the gusset plates 20 and 21 as described above. Yield portion 30a with a reduced size is formed, and when it receives a predetermined axial force, yield portion 30a yields and plastically deforms to function as a steel damper, thereby absorbing vibration energy and being excellent The seismic control effect is obtained. In addition, as a material of the damper main body 30, 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 30 are set. By doing so, a desired vibration control effect can be obtained.

拘束部材３１は、図６（ｂ）に示すようにダンパー本体３０を両面側から挟み込む対のチャンネル鋼材３２と、チャンネル鋼材３２のフランジに装着されてボルト締結されることで双方のチャンネル鋼材３２を全体としてＨ形に連結する対のカバープレート３３からなり、この拘束部材３１によりダンパー本体３０の軸方向変形が許容されつつ面内変形および面外変形が拘束されて座屈が確実に防止されるものとなっている。   As shown in FIG. 6B, the restraining member 31 is attached to a pair of channel steel members 32 that sandwich the damper main body 30 from both sides, and is fastened to the flanges of the channel steel members 32, so that both channel steel members 32 are fastened. It consists of a pair of cover plates 33 connected in an H-shape as a whole, and this restraining member 31 restrains in-plane deformation and out-of-plane deformation while allowing axial deformation of the damper main body 30 and reliably prevents buckling. It has become a thing.

以上で説明した本実施形態の耐震補強構造によれば、桁行方向の耐震性能が充分でない既存建物の妻側に上記のような耐震補強架構１Ａを設けることのみで、その耐震補強架構１Ａがバットレスと同様に機能して既存建物の桁行方向の変形を有効に抑制し、優れた耐震補強効果が得られる。   According to the earthquake-proof reinforcement structure of the present embodiment described above, the earthquake-proof reinforcement frame 1A can be made into a buttress only by providing the earthquake-proof reinforcement frame 1A as described above on the wife side of an existing building that does not have sufficient earthquake resistance in the direction of the beam. It functions in the same way as above and effectively suppresses the deformation of the existing building in the direction of the beam, resulting in excellent seismic reinforcement.

特に、主架構２の新設柱５ａを既存柱７に対して全高にわたって一体に緊結するのみならず、主架構２を補剛する副架構３を設けてその副架構３の新設梁１１も既存梁１３に対して全長にわたって緊結したので、耐震補強架構１Ａの全体を既存建物に対して構造的に確実堅個に一体化して既存建物の地震力をその耐震補強架構１Ａに対して確実に伝達し、その主架構２に組み込んだ制震ダンパー４を効果的に作動させて優れた制震効果が確実に得られる。   In particular, the new column 5a of the main frame 2 is not only tightly coupled to the existing column 7 over the entire height, but also a sub frame 3 for stiffening the main frame 2 is provided, and the new beam 11 of the sub frame 3 is also an existing beam. Since the entire seismic strengthening frame 1A is structurally and firmly integrated with the existing building, the seismic force of the existing building is reliably transmitted to the seismic strengthening frame 1A. The seismic damper 4 incorporated in the main frame 2 can be effectively operated to ensure an excellent seismic control effect.

また、制震ダンパー４としてのブレースダンパーを各層にそれぞれ２基ずつハ状もしくは逆ハ状に設置することにより、さしたるスペースを必要とせずに多数の制震ダンパー４を支障なく設置できるし、それらの制震ダンパー４を全体として２層ごとのＸ状に架設することにより中間柱を必要とせず、デザイン的にも大胆で好ましい外観が得られる。   In addition, by installing two brace dampers as seismic dampers 4 in each layer in a C-shape or reverse C-shape, a large number of seismic dampers 4 can be installed without any trouble, By installing the damping damper 4 as a whole in an X shape every two layers, an intermediate pillar is not required, and a bold and preferable appearance can be obtained in terms of design.

勿論、本実施形態の耐震補強構造は、上記のような耐震補強架構１Ａを既存建物の妻側に設けるだけであるので、改修に伴って居住性が損なわれるようなことは全くないし、さしたる設置スペースを必要とせず、改修工事も居住しながら短期間で安価に実施することが可能であるので、特に集合住宅建物に適用するものとして最適である。   Of course, the seismic reinforcement structure of the present embodiment is merely provided with the seismic reinforcement frame 1A as described above on the wife side of the existing building. Since it requires no space and can be renovated in a short period of time while living, it is particularly suitable for use in apartment buildings.

以上で本発明の一実施形態を説明したが、本発明は上記実施形態に限定されるものでは勿論なく、妻側に耐震補強架構１を新設する限りにおいて、たとえば以下に列挙するような様々な変形や応用が可能である。   Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and of course, as long as the seismic reinforcement frame 1 is newly provided on the wife side, various types as listed below, for example, Variations and applications are possible.

上記実施形態は補強対象の既存建物が雁行していることから、一方の妻側に上記の耐震補強架構１Ａを設け、他方の妻側にはそれよりもやや簡略化した耐震補強架構１Ｂを設けたが、たとえば図７〜図８に示すような単純な板状の既存建物に対しては片側の妻側にのみ耐震補強架構１Ｃを設けることで十分である。いずれにしても耐震補強架構１は補強対象の既存建物の形態や規模、要求される耐震補強性能に応じて設計すれば良い。   In the above embodiment, since the existing building to be reinforced is coasting, the above-mentioned seismic reinforcement frame 1A is provided on one wife side, and the slightly simplified earthquake-proof reinforcement frame 1B is provided on the other side. However, for example, for a simple plate-like existing building as shown in FIGS. 7 to 8, it is sufficient to provide the seismic reinforcement frame 1 </ b> C only on one wife side. In any case, the seismic reinforcement frame 1 may be designed according to the form and scale of the existing building to be reinforced and the required seismic reinforcement performance.

たとえば、上記の耐震補強架構１Ｂは、耐震補強架構１Ａに較べて新設柱５ａ，５ｂ間の間隔を小さくし、制震ダンパー４を各層に１基ずつブレースとして単独に設置したものである。また、図７〜図８に示す耐震補強架構１Ｃは、主架構２および制震ダンパー４については耐震補強架構１Ａと同様であるが、副架構３をより増強したものとなっていて、図９〜図１０に示すように副架構３として新設柱４０や新設梁４１、水平ブレース４２を設置することでその耐震補強架構全体１Ｃ自体を両方向ラーメン架構のごとく構成したものである。なお、この耐震補強架構１Ｃでは階段室１５の架構を特に利用していないが、利用するようにしても勿論良い。   For example, the seismic strengthening frame 1B described above is a structure in which the distance between the new columns 5a and 5b is made smaller than that of the seismic strengthening frame 1A, and one seismic damper 4 is installed as a brace for each layer. Further, the seismic reinforcing frame 1C shown in FIGS. 7 to 8 is the same as the seismic reinforcing frame 1A with respect to the main frame 2 and the vibration control damper 4, but the sub frame 3 is further strengthened. As shown in FIG. 10, by installing a new column 40, a new beam 41, and a horizontal brace 42 as the sub-frame 3, the entire seismic reinforcement frame 1C itself is configured as a bi-directional frame. In addition, in this earthquake-proof reinforcement frame 1C, the frame of the staircase 15 is not particularly used.

また、上記実施形態における耐震補強架構１Ａ、１Ｃのように制震ダンパー４を各層に２基ずつハ状あるいは逆ハ状に設ける場合、それらの交点の位置に中間柱を設けることも考えられる。すなわち、上記実施形態の耐震補強架構１Ａ、１Ｃにおける一対２本の新設柱５ａ、５ｂの間に他の新設柱である中間柱を設け、それら３本の新設柱の間に１基ずつ制震ダンパー４を設けることが考えられ、本発明ではそのように構成することも妨げるものではないが、各層に並設する２基の制震ダンパーの応力が互いに釣り合うような設計、あるいは２層ごとにＸ状をなす４基の制震ダンパーが相互に釣り合うような設計とすれば中間柱は敢えて設けることはなく、上記実施形態のように中間柱を省略した形態とする方が合理的である。   Further, in the case where two damping dampers 4 are provided in each layer in the shape of C or reverse like the seismic reinforcement frames 1A and 1C in the above embodiment, it is conceivable to provide an intermediate column at the intersection of these. That is, an intermediate column, which is another newly installed column, is provided between the two newly installed columns 5a and 5b in the seismic reinforcing frames 1A and 1C of the above embodiment, and one unit is controlled between these three newly installed columns. Although it is conceivable to provide a damper 4 and the present invention does not prevent such a configuration, the design is such that the stresses of two damping dampers arranged in parallel in each layer are balanced with each other, or every two layers. If the four seismic dampers having the X shape are balanced with each other, the intermediate column is not provided intentionally, and it is more rational to omit the intermediate column as in the above embodiment.

上記実施形態では主架構２における各新設柱５を鉄骨鉄筋コンクリート造とし、新設梁６を鉄骨造とし、副架構３における新設梁１１を鉄骨鉄筋コンクリート造とし、水平ブレース１２を鉄骨造としたが、耐震補強架構１の構造は任意であり、所望の剛性、耐力が得られるものであれば、鉄筋コンクリート造、コンクリート充填鋼管構造、プレキャストコンクリート構造、その他の構造を単独であるいは任意に組み合わせて採用することが可能である。   In the above embodiment, each new column 5 in the main frame 2 is made of steel reinforced concrete, the new beam 6 is made of steel, the new beam 11 in the sub frame 3 is made of steel reinforced concrete, and the horizontal brace 12 is made of steel. The structure of the reinforced frame 1 is arbitrary, and a reinforced concrete structure, a concrete-filled steel pipe structure, a precast concrete structure, and other structures may be employed alone or in any combination as long as desired rigidity and proof stress can be obtained. Is possible.

上記実施形態では主架構２の新設柱５ａと副架構の新設梁１１とを既存柱７および既存梁１３に対して後施工アンカー８、１４によりそれぞれ緊結するものとし、それによりそれらを簡単な手法で確実に一体化でき、かつ施工時にも大きな騒音や振動を発生することがないので有効であるが、それに限るものでもなく、新設柱５ａや新設梁１１の構造および既存建物の構造に応じて、それらを構造的に確実強固に一体化するために最適な手法を適宜採用すれば良い。   In the above embodiment, the new column 5a of the main frame 2 and the new beam 11 of the sub frame are fastened to the existing column 7 and the existing beam 13 by the post-installed anchors 8 and 14, respectively. It is effective because it can be reliably integrated and does not generate large noise or vibration during construction, but it is not limited to this, depending on the structure of the new pillar 5a and the new beam 11 and the structure of the existing building. In order to reliably and firmly integrate them structurally, an optimal method may be adopted as appropriate.

上記実施形態では既存の階段室１５の架構を副架構３の一部として利用するものとしたが、階段室がない場合にはそれを新設しても良く、その場合には耐震補強架構１内に階段室を組み込む形態で新設したり、双方の架構を兼用する架構とすることも考えられる。勿論、階段室に限らず設備機械室や設備シャフト、エレベータ室、あるいはそれらを集約配置したコア部等が妻側に突出部として設けられている場合、もしくは新設する場合にも、その躯体を副架構３の一部として利用することが可能である。   In the above embodiment, the existing frame of the staircase 15 is used as a part of the sub-frame 3. However, if there is no staircase, it may be newly installed. It is also possible to construct a new structure with a built-in staircase, or to use a frame that combines both frames. Of course, not only the staircase but also the equipment machine room, the equipment shaft, the elevator room, or the core part where these are centrally arranged are provided as protrusions on the wife side, or when the housing is newly installed, It can be used as a part of the frame 3.

上記実施形態のように制震ダンパー４を各層にハ状あるいは逆ハ状に配置し、全体としてはＸ状に配置することが好ましいが、それに限るものでもなく、所望の制震効果が得られるように適正台数の制震ダンパー４を適正位置に適正配置すれば良く、必要であれば制震ダンパー４を主架構２のみならず副架構３にも組み込むことも考えられる。また、制震ダンパーとしては上記実施形態において採用したようなブレースダンパーが好適であるが、それに限るものでもなく、所望の制震効果が得られるものであれば他の形式のダンパーも採用可能である。   As in the above embodiment, it is preferable to arrange the damping damper 4 in each layer in a C shape or an inverted C shape, and as a whole, it is preferably arranged in an X shape. However, the present invention is not limited to this, and a desired damping effect can be obtained. Thus, it is only necessary to arrange the appropriate number of damping dampers 4 at the appropriate positions. If necessary, the damping dampers 4 may be incorporated not only in the main frame 2 but also in the secondary frame 3. In addition, the brace damper as employed in the above embodiment is suitable as the damping damper, but is not limited thereto, and other types of dampers can be adopted as long as a desired damping effect can be obtained. is there.

上記実施形態における補強対象の既存建物は鉄筋コンクリート造の地上１０階建ての集合住宅であるが、本発明は様々な構造、規模、用途の建物を対象として広く適用できるものであることは言うまでもない。   The existing building to be reinforced in the above embodiment is a reinforced concrete 10-story apartment house, but it goes without saying that the present invention can be widely applied to buildings of various structures, scales, and uses.

本発明の耐震補強構造の一実施形態を示すもので、妻部に耐震補強架構を設置した既存建物を示す全体立面図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the seismic reinforcement structure of the present invention, and is an overall elevation view showing an existing building in which a seismic reinforcement frame is installed at a wife part. 同、全体平面図である。FIG. 同、耐震補強架構の詳細を示す部分立面図である。FIG. 3 is a partial elevation view showing details of the seismic reinforcement frame. 同、平面図である。FIG. 同、要部断面図（図４におけるＶ−Ｖ線視拡大図）である。FIG. 5 is a cross-sectional view of the relevant part (enlarged view taken along line VV in FIG. 4). 同、制震ダンパーの一例を示す図である。It is a figure which shows an example of a damping damper same as the above. 本発明の耐震補強構造の他の実施形態を示すもので、妻部に耐震補強架構を設置した既存建物を示す全体立面図である。The other embodiment of the earthquake-proof reinforcement structure of this invention is shown, Comprising: It is the whole elevation view which shows the existing building which installed the earthquake-proof reinforcement frame in the wife part. 同、全体平面図である。FIG. 同、耐震補強架構の詳細を示す部分立面図である。FIG. 3 is a partial elevation view showing details of the seismic reinforcement frame. 同、平面図である。FIG.

符号の説明Explanation of symbols

１（１Ａ、１Ｂ、１Ｃ） 耐震補強架構
２ 主架構
３ 副架構
４ 制震ダンパー（ブレースダンパー）
５（５ａ、５ｂ） 新設柱
６ 新設梁
７ 既存柱
８ 後施工アンカー
１１ 新設梁
１２ 水平ブレース
１３ 既存梁
１４ 後施工アンカー
１５ 階段室（突出部）
１６ 水平ブレース
２０、２１ ガセットプレート
３０ ダンパー本体
３１ 拘束部材
３２ チャンネル鋼材
３３ カバープレート
４０ 新設柱
４１ 新設梁
４２ 水平ブレース 1 (1A, 1B, 1C) Seismic reinforcement frame 2 Main frame 3 Sub frame 4 Damping damper (brace damper)
5 (5a, 5b) New column 6 New beam 7 Existing column 8 Post-construction anchor 11 New beam 12 Horizontal brace 13 Existing beam 14 Post-construction anchor 15 Staircase (projection)
16 Horizontal brace 20, 21 Gusset plate 30 Damper body 31 Restraint member 32 Channel steel 33 Cover plate 40 New pillar 41 New beam 42 Horizontal brace

Claims (5)

既存建物の桁行方向の耐震補強を行うためにその妻側に耐震補強架構を新設した耐震補強構造であって、
前記耐震補強架構は、既存建物の桁行方向の既存架構を妻側に延長した形態の桁行方向のラーメン架構からなる主架構と、該主架構をスパン方向から補剛する副架構と、前記主架構に組み込んだ制震ダンパーからなり、
前記主架構は、少なくとも一対２本の新設柱と該新設柱間の各層に架設された新設梁とを主体として、一方の新設柱を既存建物の妻面に設けられている既存柱に対して全高にわたって一体に緊結してなり、
前記副架構は、前記主架構における一方の新設柱に一端が接合された各層のスパン方向の新設梁と、該新設梁と前記主架構との間に架設された水平ブレースとを有して、前記新設梁を既存建物の妻面の各層に設けられている既存梁の側部に対して全長にわたって一体に緊結してなり、
前記制震ダンパーを、前記主架構における新設柱とそれらの間の各層に架設した桁行方向の新設梁との間の各層にブレースの形態で架設してなることを特徴とする耐震補強構造。 A seismic retrofit structure with a seismic retrofit frame installed on the side of the wife to perform seismic retrofit of existing buildings
The seismic strengthening frame includes a main frame composed of a ramen frame in the direction of the beam extending the existing frame in the direction of the beam of the existing building to the wife side, a sub frame that stiffens the main frame from the span direction, and the main frame. Consisting of seismic dampers incorporated in the
The main frame is mainly composed of at least one pair of two new columns and new beams installed in each layer between the new columns, and one of the new columns is provided with respect to the existing columns provided on the end face of the existing building. Tightly united throughout the height,
The sub-frame has a new beam in the span direction of each layer in which one end is joined to one new column in the main frame, and a horizontal brace installed between the new beam and the main frame, The new beam is integrally bonded over the entire length to the side of the existing beam provided in each layer of the end face of the existing building,
A seismic retrofit structure characterized in that the seismic damper is constructed in the form of braces on each layer between the new pillars in the main frame and the new beams installed in each layer between them. 請求項１記載の耐震補強構造であって、
前記制震ダンパーを各層に２基ずつハ状または逆ハ状をなすように桁行方向に並べて架設してなることを特徴とする耐震補強構造。 The earthquake-proof reinforcement structure according to claim 1,
A seismic reinforcement structure, wherein two seismic dampers are laid in a row direction so as to form two or two in each layer. 請求項２記載の耐震補強構造であって、
各層に２基ずつ架設する制震ダンパーの向きを１層ごとに交互に逆向きとすることにより、２層ごとに４基の制震ダンパーをＸ状に架設してなることを特徴とする耐震補強構造。 The earthquake-proof reinforcement structure according to claim 2,
The seismic resistance is characterized in that four seismic dampers are installed in an X-shape for each two layers by alternating the direction of the seismic dampers installed two on each layer alternately in each layer. Reinforced structure. 請求項１，２または３記載の耐震補強構造であって、
既存建物の妻側に位置する既存あるいは新設の突出部の架構と前記主架構との間に、前記副架構の一部となる水平ブレースを架設してなることを特徴とする耐震補強構造。 A seismic reinforcement structure according to claim 1, 2 or 3,
A seismic reinforcement structure characterized by comprising a horizontal brace that is a part of the sub frame between a frame of an existing or new projecting portion located on the wife side of an existing building and the main frame. 請求項１，２，３または４記載の耐震補強構造であって、
前記制震ダンパーは、ブレースとして機能するとともに軸方向に降伏して鋼材ダンパーとしても機能する帯板状の鋼板からなるダンパー本体と、該ダンパー本体の外側に装着されてその座屈を拘束する拘束部材からなるブレースダンパーであることを特徴とする耐震補強構造。 The seismic reinforcement structure according to claim 1, 2, 3 or 4,
The seismic damper is a damper body made of a strip-shaped steel plate that functions as a brace and yields in the axial direction and also functions as a steel damper, and a restraint that is attached to the outside of the damper body to restrain its buckling. Seismic reinforcement structure characterized by being a brace damper made of members.
JP2005093358A 2005-03-29 2005-03-29 Seismic reinforcement structure Active JP4247496B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005093358A JP4247496B2 (en) 2005-03-29 2005-03-29 Seismic reinforcement structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005093358A JP4247496B2 (en) 2005-03-29 2005-03-29 Seismic reinforcement structure

Publications (2)

Publication Number Publication Date
JP2006274613A JP2006274613A (en) 2006-10-12
JP4247496B2 true JP4247496B2 (en) 2009-04-02

Family

ID=37209638

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005093358A Active JP4247496B2 (en) 2005-03-29 2005-03-29 Seismic reinforcement structure

Country Status (1)

Country Link
JP (1) JP4247496B2 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4957295B2 (en) * 2007-03-05 2012-06-20 鹿島建設株式会社 Seismic control pier structure
JP2009243091A (en) * 2008-03-31 2009-10-22 Railway Technical Res Inst Aseismatic reinforcing structure of viaduct
KR101086965B1 (en) * 2009-01-30 2011-11-29 고려대학교 산학협력단 Diagrid Structure
JP5204076B2 (en) * 2009-11-11 2013-06-05 飛島建設株式会社 Seismic retrofit method and seismic retrofit structure for existing buildings
JP2011163039A (en) * 2010-02-12 2011-08-25 Akira Wada Building
KR101187440B1 (en) * 2010-03-03 2012-10-02 한국복합섬유 주식회사 Aseismatic reinforcment construction of a building
JP2012041799A (en) * 2010-08-23 2012-03-01 Shimizu Corp Vibration control reinforcement structure of existing building
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
US9689173B2 (en) * 2015-09-01 2017-06-27 Hory Corporation Structure attached with vibration control device
CN112942705B (en) * 2021-02-05 2022-03-22 绍兴文理学院 Telescopic assembled stair joint anti-seismic connection method

Also Published As

Publication number Publication date
JP2006274613A (en) 2006-10-12

Similar Documents

Publication Publication Date Title
JP4247496B2 (en) Seismic reinforcement structure
KR101767677B1 (en) Compisite column structure for steel and concrete
JP3981949B2 (en) Seismic reinforcement structure
JP2010138658A (en) Seismic strengthening structure of existing building
JP6166560B2 (en) Extension structure of seismic isolation building
TW201627561A (en) Reinforcement structure for existing buildings
JP4105191B2 (en) Column and beam frame
JP4873981B2 (en) Seismic reinforcement structure for existing buildings
JP4423640B2 (en) Building structure
JP5711897B2 (en) Seismic strengthening method and seismic strengthening frame for existing buildings
JP2005248438A (en) Building structure
RU88712U1 (en) STRENGTHENING REINFORCEMENT CONCRETE MULTI-BLASTING FLOOR PLATES
JP2006045933A (en) Continuous layer core wall type seismic control high-rise multiple dwelling house building
KR20130117204A (en) Earthquake-resistant frame and seismic retrofit method for building using the same
JP2009256890A (en) Building structure and its construction method
KR101266215B1 (en) Improved seismic performance of Staggered wall system with central hall
JP2009155868A (en) Building structure
JP2006274733A (en) Triple tube structure and vibration control system thereof
JP5450971B2 (en) Vibration control panel installation structure
JP5703412B2 (en) Frame structure of plate apartment
JP3211098U (en) Seismic reinforcement structure for existing steel buildings
JP5683349B2 (en) Frame structure of plate apartment
JP2005273181A (en) Structure of building
JP2013227775A (en) Seismic strengthening structure and method for existing building
JP5111920B2 (en) Seismic reinforcement structure for existing buildings

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20070607

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20081113

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20081202

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20081224

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120123

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Ref document number: 4247496

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120123

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130123

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130123

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140123

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140123

Year of fee payment: 5

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140123

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20150123

Year of fee payment: 6