JP2005155139A - Seismic reinforcing external frame construction method of existing building - Google Patents

Seismic reinforcing external frame construction method of existing building Download PDF

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JP2005155139A
JP2005155139A JP2003394165A JP2003394165A JP2005155139A JP 2005155139 A JP2005155139 A JP 2005155139A JP 2003394165 A JP2003394165 A JP 2003394165A JP 2003394165 A JP2003394165 A JP 2003394165A JP 2005155139 A JP2005155139 A JP 2005155139A
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src
reinforcing
existing building
outer frame
unit
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Hidetoshi Taga
秀俊 多賀
Kishihiko Moriyama
毅子彦 森山
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Oriental Construction Co
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Oriental Construction Co
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<P>PROBLEM TO BE SOLVED: To provide a seismic reinforcing external frame construction method capable of harmonizing with the strength of the SRC structure or the SRC structural + RC structural existing building and a seismic reinforcing external frame and preventing an unreasonable stress from working on the existing building by a horizontal force to effectively control the vibration. <P>SOLUTION: The upper and lower reinforcing column unit 5 arranged at the outside of SRC structure of the existing building is united by the bolt connection or welding connection of the vertical steel frame body 12, in the precast SRC made reinforcing beam unit 6 arranged between laterally adjusting reinforcing column units 5 and the reinforced column unit 5, respective vertical steel frames 14 are connected by bolts or welding, the gap between a precast RC made reinforcing column unit and a reinforcing beam unit is connected together by the vertical PC member and the lateral PC steel member to construct an external frame. The external frame and the existing building are connected by a connection slub. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、既存建物の外部にプレキャストプレストレスコンクリート部材で新しい補強フレームを構築し、既存建物とはせん断力伝達部材で接合する耐震補強外フレーム構築工法に関する。   The present invention relates to a seismic reinforced outer frame construction method in which a new reinforcing frame is constructed with a precast prestressed concrete member outside the existing building, and the existing building is joined with a shear force transmission member.

既存建物の耐震改修工法は、大別すると次の(1)〜(10)がある。   The seismic retrofitting methods for existing buildings are broadly divided into the following (1) to (10).

(1)耐震壁の増設(増設壁、増し打ち壁、開口部閉塞壁、そで(袖)壁等を構築する)。(2)鉄骨枠組補強(鉄骨ブレース、鋼板壁等を構築する)。(3)外付け鉄骨補強(外付けブレースを構築する)。(4)外部架構増設補強(コアの増設、メガ架構の増設、バットレスの増設)。(5)RC巻き立て補強(柱等に溶接金網・フ―プ筋などを配設)。(6)鋼板補強(柱等を角形鋼管、円形鋼板などで補強)。(7)連続繊維補強(柱等をシート貼り、成形板で補強)。(8)免震構造化(基礎免震、地下免震、中間免震など)。(9)制振機構の組込み(AMD、TMD,金属ダンパー、オイルダンパー等)。(10)その他建物損傷集中の回避(Fesの改善、壁スリット、破壊モードの改善)等があり、建物の用途、規模、構造、使用性、施工性などで選択されているのが現状である。  (1) Expansion of earthquake-resistant walls (construction of expansion walls, additional striking walls, opening blocking walls, sleeve (sleeve) walls, etc.). (2) Steel frame reinforcement (construct steel braces, steel plate walls, etc.). (3) External steel frame reinforcement (constructing an external brace). (4) External frame expansion reinforcement (addition of core, expansion of mega frame, expansion of buttress). (5) Reinforcement of RC winding (arrangement of welded wire mesh / hoop bars etc. on pillars). (6) Steel plate reinforcement (reinforcing columns etc. with square steel pipes, round steel plates, etc.). (7) Continuous fiber reinforcement (pillars are attached to the sheet and reinforced with molded plates). (8) Seismic isolation structure (basic isolation, underground isolation, intermediate isolation, etc.). (9) Built-in damping mechanism (AMD, TMD, metal damper, oil damper, etc.). (10) Others include avoidance of building damage concentration (improvement of Fes, improvement of wall slits, destruction mode), etc., and it is currently selected based on the use, scale, structure, usability, workability, etc. of the building .

(1)〜(10)の耐震補強工法のうち、既存建物を使用(居住)状態で補強施工可能なのは、 (3)外付け鉄骨補強と、(4)外部架構増設補強であり、本発明は(4)の系列に属するものである。この種の従来例として、特許第3369387号公報(特許文献1)、特開平10−18639(特許文献2)などがある。  Among the seismic retrofitting methods (1) to (10), it is possible to reinforce an existing building in a used (residential) state (3) external steel frame reinforcement and (4) external frame expansion reinforcement. It belongs to the series (4). As this type of conventional example, there are Japanese Patent No. 3369387 (Patent Document 1), Japanese Patent Laid-Open No. 10-18639 (Patent Document 2), and the like.

特許第3369387号や特開平10−18639開示される従来一般の外フレーム工法は、既存建物と干渉しない領域にこれとは独立し、既存建物の構面外周と平行で、既存建物の構面外に位置する平面架構からなる耐震架構、もしくは床が伴わない立体架構の耐震架構を、その耐震架構が水平力を分担するように構築するもので、これにより既存建物に構造的改良を加えることなく、当該既存建物の架構に応力が集中することを回避するものである。
特許第3369387号公報 特開平10−18639号公報
The conventional outer frame method disclosed in Japanese Patent No. 3369387 and Japanese Patent Laid-Open No. 10-18639 is independent from the area where it does not interfere with the existing building, parallel to the outer periphery of the existing building, and outside the existing building. A seismic frame consisting of a flat frame located in the center or a three-dimensional frame with no floor is constructed so that the seismic frame shares the horizontal force, so that structural improvements to existing buildings are not required. This is to avoid stress concentration on the frame of the existing building.
Japanese Patent No. 3369387 JP-A-10-18639

外フレームでの補強対象とされる中高層の建物には、SRC造(鉄骨鉄筋コンクリート造)または、下層SRC造で上層RC造(鉄筋コンクリート造)の建物が多くある。   Among the high-rise buildings that are to be reinforced by the outer frame, there are many SRC structures (steel-framed reinforced concrete structures) or lower-layer SRC structures and upper-layer RC structures (reinforced concrete structures).

本発明者の研究によると、このようなSRC造や、下層SRC造で上層RC造の建物の耐震補強を行うときは、鋼材をトラスに組み立ててなる従来の外フレーム工法よりも、プレキャストPC造の外フレームによる耐震補強を行うのが合理的であり、とくに、既存建物がSRC造(鉄骨鉄筋コンクリート造)であれば、補強フレームもプレキャストSRC造とし、既存建物がRC造(鉄筋コンクリート造)であれば、補強フレームもプレキャストSRC造とし、さらに、既存建物が下層SRC造で上層RC造(鉄筋コンクリート造)であれば、外フレームも下層プレキャストSRC造で、上層プレキャストPC造の外フレーム工法で行うのが、地震時の揺れに対して既存建物と外フレームの強度面で調和が取れ、既存建物に無理な応力が掛るのを抑えて既存建物が破損するのを抑え、かつ効率的に制振でき合理的であることを見出した。   According to the research of the present inventor, when performing seismic reinforcement of such an SRC structure or a lower-layer SRC structure with an upper-layer RC structure, a precast PC structure is used rather than a conventional outer frame method in which steel is assembled into a truss. It is reasonable to perform seismic reinforcement with the outer frame, especially if the existing building is SRC (steel reinforced concrete), the reinforcement frame is also precast SRC, and the existing building is RC (reinforced concrete). For example, if the existing frame is a lower layer SRC structure and an upper layer RC structure (reinforced concrete structure), the outer frame is also a lower layer precast SRC structure, and the upper frame precast PC structure is used. However, the strength of the existing building and the outer frame can be harmonized against the shaking at the time of the earthquake, and the existing building is subjected to excessive stress. The suppressing of existing buildings damaged by suppressing, and was found to be efficient damping can reasonably.

本発明は前記の観点から創案されたもので、既存建物の構造に合わせた外フレーム耐震補強工法として、SRC造の建物にはプレキャストSRC造の柱と梁を、また、上層部RC造の場合には、プレキャストPC造の柱と梁を既存のベランダや廊下に近接した外側に架設し、既存躯体(既存梁)に打設した、後施工アンカー(ケミカルアンカー)と既存スラブ下に打設したコンクリートスラブを介して、せん断力既存梁に打設したケミカルアンカーと既存スラブと新設コンクリートスラブに埋設したせん断伝達用金物のせん断力によるせん断伝達法を提供することを目的とする。   The present invention was devised from the above viewpoint. As an outer frame seismic reinforcement method adapted to the structure of an existing building, a precast SRC column and beam are used for an SRC structure, and an upper layer RC structure is used. In addition, precast PC columns and beams were installed outside the existing verandas and corridors, and placed on the existing frame (existing beams), and then placed under the post-installed anchor (chemical anchor) and the existing slab. The purpose is to provide a shear transfer method using a shear force of a chemical anchor placed on an existing beam of a shear force and an existing slab and a metal for shear transmission embedded in a new concrete slab through a concrete slab.

前記の目的を達成するため、本発明は次のように構成する。   In order to achieve the above object, the present invention is configured as follows.

第1発明は、SRC造の既存建物の耐震補強外フレーム工法であって、外フレームを複数の補強柱ユニットと補強梁ユニットを組み立てて構成し、前記補強柱・梁ユニットは、既存建物のSRC造の外側部位では、プレキャスト製のSRC補強柱ユニット及びSRC補強梁ユニットで構成したうえ、それぞれの柱・梁ユニットに設けた縦鉄骨と横鉄骨同士を接合して相互間を一体化し、既存建物と外フレームとは現場施工の接合スラブでせん断力を伝達可能に接合したことを特徴とする。   A first invention is a seismic reinforcement outer frame method for an existing building of SRC structure, and the outer frame is constructed by assembling a plurality of reinforcing column units and reinforcing beam units, and the reinforcing column / beam unit is an SRC of an existing building. In the outer part of the building, it is composed of precast SRC reinforced column units and SRC reinforced beam units, and the vertical and horizontal steel frames provided in each column / beam unit are joined together to integrate each other. The outer frame and the outer frame are joined by a joint slab constructed on site so that shear force can be transmitted.

第2発明は、第1発明において、下層部がSRC造で上層部がRC造の既存建物の耐震補強外フレーム工法であって、外フレームを複数の補強柱ユニットと補強梁ユニットを組み立てて構成し、前記補強柱・梁ユニットは、既存建物のSRC造の外側部位では、プレキャスト製のSRC補強柱ユニット及びSRC補強梁ユニットで構成したうえ、それぞれの柱・梁ユニットに設けた縦鉄骨と横鉄骨同士を接合して相互間を一体化し、既存建物のRC造の外側部位ではプレキャスト製のRC補強柱ユニットとRC補強梁ユニットで構成したうえ、それぞれの内部を挿通する縦PC鋼材と横PC鋼材にて各補強柱・梁ユニット相互を緊張一体化し、既存建物と外フレームとは現場施工の接合スラブでせん断力を伝達可能に接合したことを特徴とする。   The second invention is the seismic reinforcement outer frame construction method of the existing building in which the lower layer portion is SRC structure and the upper layer portion is RC structure in the first invention, and the outer frame is constructed by assembling a plurality of reinforcing column units and reinforcing beam units. The reinforcing column / beam unit is composed of a precast SRC reinforcing column unit and an SRC reinforcing beam unit at the outer part of the SRC structure of the existing building, and the vertical steel frame provided in each column / beam unit Steel frames are joined to each other, and the RC part of the existing building is composed of pre-cast RC reinforcing column units and RC reinforcing beam units at the outer part of the RC structure. Each reinforcement column / beam unit is tensioned and integrated with steel, and the existing building and the outer frame are connected to each other so that shear force can be transmitted by a joint slab on site construction. .

第3発明は、第1発明または第2発明において、前記SRC補強柱ユニットのコンクリート本体の上下部と側部から縦鉄骨と横鉄骨を突出させると共に、前記SRC補強梁ユニットのコンクリート本体の側部から横鉄骨を突出させ、前記縦鉄骨同士を突き合わせて接合し、かつ、その外側に鉄筋コンクリートを打設して上下の補強柱ユニットを接合し、前記横鉄骨同士を突き合わせて接合し、かつ、その外側に鉄筋コンクリートを打設して横方向の補強柱ユニットと補強梁ユニットを接合することを特徴とする。   According to a third invention, in the first invention or the second invention, the vertical steel frame and the horizontal steel frame are projected from the upper and lower parts and the side part of the concrete body of the SRC reinforcing column unit, and the side part of the concrete body of the SRC reinforcing beam unit The horizontal steel frames are protruded from each other, the vertical steel frames are butted together and joined, and reinforced concrete is placed on the outside to join the upper and lower reinforcing column units, the transverse steel frames are joined together and joined, and Reinforced concrete is placed on the outside, and the lateral reinforcing column unit and the reinforcing beam unit are joined.

第4発明では、第2発明において、前記RC補強柱ユニットのコンクリート本体を上下方向に貫通する縦PC鋼材によって上下のRC補強柱ユニットを緊張して接合一体化すると共に、RC補強柱ユニットとRC補強梁ユニットのコンクリート本体を横方向に貫通する横PC鋼材によってRC補強柱ユニットとRC補強柱ユニットを緊張して接合一体化することを特徴とする。   According to a fourth invention, in the second invention, the upper and lower RC reinforcing column units are tensioned and joined together by a vertical PC steel material vertically penetrating the concrete body of the RC reinforcing column unit. The RC reinforcing column unit and the RC reinforcing column unit are tensioned and joined and integrated by a horizontal PC steel material penetrating the concrete body of the reinforcing beam unit in the horizontal direction.

第5発明では、第2発明におけるRC補強柱ユニットとRC補強梁ユニットに代えて、プレキャスト(PCa)製の補強柱ユニットとプレキャスト(PCa)製の補強梁ユニットで構成したうえ、各補強柱・梁ユニット相互を各部材から突出させた連結筋を介して緊張一体化すると共にその周囲に接合部コンクリートを打設し、既存建物と外フレームとは現場施工の接合スラブでせん断力を伝達可能に接合したことを特徴とする。   In the fifth invention, instead of the RC reinforcing column unit and the RC reinforcing beam unit in the second invention, the reinforcing column unit is composed of a precast (PCa) reinforcing column unit and a precast (PCa) reinforcing beam unit. The beam unit is tensioned and integrated through connecting bars protruding from each member, and joint concrete is placed around it, and shear force can be transmitted between the existing building and the outer frame with a joint slab on site. It is characterized by being joined.

第6発明では、第1発明〜第5発明において、前記接合スラブは、現場施工によるコンクリート打設で構築されていることを特徴とする。   According to a sixth invention, in the first to fifth inventions, the joining slab is constructed by concrete placement by site construction.

第7発明では、第1発明〜第5発明において、前記接合スラブは、既存建物の梁部に後施工アンカーを施工しコンクリートを打設することで、若しくは前記コンクリートにPC鋼材でプレストレスを導入し既存建物と外フレームに圧着して構築することを特徴とする。   In a seventh invention, in the first invention to the fifth invention, the joint slab is constructed by installing a post-construction anchor on a beam portion of an existing building and placing concrete, or introducing pre-stress into the concrete with PC steel. It is constructed by crimping the existing building and the outer frame.

第8発明では、第1発明〜第5発明において、前記接合スラブは、外フレームに一体に設けた型枠兼用のプレキャスト版の上部にコンクリートを打設して構築することを特徴とする。   According to an eighth aspect of the invention, in the first to fifth aspects of the invention, the joining slab is constructed by placing concrete on the upper part of a precast plate also used as a formwork provided integrally with an outer frame.

第9発明では、第1発明〜第5発明において、前記接合スラブは、既存建物に設けられたベランダや廊下・庇などの既存スラブの上側若しくは下側にコンクリートを打設し、せん断伝達金物を介してせん断力伝達可能に接合することを特徴とする。
In a ninth invention, in the first invention to the fifth invention, the joining slab is formed by placing concrete on the upper side or the lower side of an existing slab such as a veranda, a corridor, or a fence provided in an existing building, It joins so that shearing force can be transmitted through.

本発明によると、鋼材をトラスに組み立ててなる従来の既存建物の外フレーム補強工法に較べ、プレキャストコンクリート製の外フレームで耐震補強を行うので、工場生産性、施工性、外観性等に優れると共に、とくに、既存建物がSRC造(鉄骨鉄筋コンクリート造)であれば、補強フレームもプレキャストSRC外フレームとし、既存建物が下層部SRC造で上層部RC造(鉄筋コンクリート造)であれば、下層部プレキャストSRC製で、上層部プレキャストRC製またはプレキャストコンクリート(PCa)製の外フレームとしているので、既存建物の水平方向の揺れに対して、既存建物と外フレームの間で強度上の調和が取れ、既存建物に無理な応力が掛るのを抑えて効率的に制振作用を発揮できるものである。   According to the present invention, compared with the conventional outer frame reinforcement method of existing buildings that are made by assembling steel trusses, the outer frame made of precast concrete is seismic reinforced, so that it is excellent in factory productivity, workability, appearance, etc. Especially, if the existing building is SRC structure (steel reinforced concrete structure), the reinforcement frame is also a precast SRC outer frame, and if the existing building is the lower layer SRC structure and the upper layer RC structure (reinforced concrete structure), the lower layer precast SRC Because it is made of an upper frame made of precast RC or precast concrete (PCa), strength can be harmonized between the existing building and the outer frame against the horizontal shaking of the existing building. Therefore, it is possible to effectively exert a vibration damping effect while suppressing excessive stress on the surface.

また、前記外フレームは、既存建物のベランダや廊下に近接した外側に架設し、既存建物との接合は、既存躯体(既存梁)と外フレームに設けた後施工アンカーなどのせん断伝達用金物を介して現場での打設コンクリートによる接合スラブで構築するので、施工が容易であると共に、既存建物と外フレームの間をせん断力伝達可能に接合できる効果がある。   The outer frame is installed outside the veranda or corridor of the existing building, and the existing frame (existing beam) and post-installed anchors such as post-installed anchors provided on the outer frame are joined to the existing building. Therefore, construction is easy, and there is an effect that shearing force can be transmitted between the existing building and the outer frame.

次に本発明を図示の実施形態に基づいて詳細に説明する。   Next, the present invention will be described in detail based on the illustrated embodiment.

本発明の概要を説明すると、図1は、既存建物1の側面の外側に、耐震補強用の外フレーム2を構築している態様の側面図、図2は平面図である。   The outline of the present invention will be described. FIG. 1 is a side view of an aspect in which an outer frame 2 for seismic reinforcement is constructed outside the side surface of an existing building 1, and FIG. 2 is a plan view.

既存建物1は、(1)SRC造(鉄骨鉄筋コンクリート造)の場合、(2)RC造(鉄筋コンクリート造)の場合、(3)下層部SRC造で上層部RC造の場合があり、本発明に係る耐震補強外フレーム構造は、(1)〜(3)の何れにも適用できる。図1に示す既存建物1は、下層部3がSRC造で上層部4がRC造またはPC造の建物を示し、同図の黒枠で示す外フレーム2は、SRC造の下層部3を耐震補強している態様を示す。   The existing building 1 may be (1) SRC structure (steel reinforced concrete structure), (2) RC structure (reinforced concrete structure), (3) Lower layer SRC structure, and upper layer RC structure. The seismic reinforcement outer frame structure can be applied to any of (1) to (3). The existing building 1 shown in FIG. 1 is a building in which the lower layer 3 is SRC and the upper layer 4 is RC or PC, and the outer frame 2 indicated by a black frame in FIG. The aspect which is doing is shown.

本発明において、既存建物1のSRC造の下層部3は、図5〜図7に示すSRC補強柱ユニット5とSRC補強梁ユニット6で補強し、RC造またはPC造の上層部3は、図9、図10に示すRC補強柱ユニット15とRC補強梁ユニット16で補強するものである(詳細は後述する)。つまり、本発明では、既存建物1がSRC造の部位にに対してはSRCで補強し、RC造またはPC造の部位に対してはRCで補強することで、既存建物1と外フレーム2との強度上の調和を取り、円滑な耐震機能を発揮させることを特徴とする。   In the present invention, the SRC lower layer 3 of the existing building 1 is reinforced by the SRC reinforcing column unit 5 and the SRC reinforcing beam unit 6 shown in FIGS. 9. Reinforcement is performed by the RC reinforcing column unit 15 and the RC reinforcing beam unit 16 shown in FIG. 10 (details will be described later). In other words, in the present invention, the existing building 1 is reinforced with SRC for the SRC structure, and the RC or PC structure is reinforced with RC, so that the existing building 1 and the outer frame 2 It is characterized by harmonizing the strength of the steel and demonstrating a smooth seismic function.

図3は、既存建物1と外フレーム5を現場施工の接合スラブ7で一体化した状態における縦断側面図、図4は、補強基礎部の拡大断面図、図5は、プレキャストコンクリート製のSRC補強柱ユニット5と、同じく、プレキャストコンクリート製のSRC補強梁ユニット6を結合しながら外フレーム2を構築する態様を示す拡大斜視図、図6は、SRC補強柱ユニット5とSRC補強梁ユニット6を接合した継手部を断面で示す正面図、図7(a)は、図6の継手部の拡大図、(b)は同図(a)のA−A断面図、図8は、既存建物1とSRC補強梁ユニット6との水平せん断力伝達用の接合スラブ7による取り合い部の断面図である。   FIG. 3 is a longitudinal side view of an existing building 1 and an outer frame 5 integrated with a joint slab 7 constructed on site, FIG. 4 is an enlarged cross-sectional view of a reinforcing foundation, and FIG. 5 is an SRC reinforcement made of precast concrete. FIG. 6 is an enlarged perspective view showing a mode in which the outer frame 2 is constructed while connecting the column unit 5 and the SRC reinforcing beam unit 6 made of precast concrete, and FIG. 6 is a view showing the joining of the SRC reinforcing column unit 5 and the SRC reinforcing beam unit 6. FIG. 7A is an enlarged view of the joint part of FIG. 6, FIG. 7B is an AA cross-sectional view of FIG. It is sectional drawing of the joint part by the joining slab 7 for horizontal shearing force transmission with the SRC reinforcement beam unit 6. FIG.

図9は、プレキャストコンクリート製のRC補強柱ユニット15と、同じくプレキャストコンクリート製のRC補強梁ユニット16を縦PC鋼材8と横PC鋼材10により結合しながら外フレーム2の上部を構築する態様を示す拡大斜視図、図10は、外フレーム2のSRC補強柱・梁部とRC補強柱・梁部との境部におけるSRC補強柱ユニット5とRC補強柱ユニット15の接合部を断面で示す正面図、図11は、図10の接合部(B)の拡大図、図12は、既存建物1とRC補強梁ユニット16との水平せん断力伝達用の接合スラブ7による取り合い部の断面図である。   FIG. 9 shows an aspect in which the upper part of the outer frame 2 is constructed while the RC reinforcing column unit 15 made of precast concrete and the RC reinforcing beam unit 16 also made of precast concrete are connected by the vertical PC steel material 8 and the horizontal PC steel material 10. FIG. 10 is an enlarged perspective view, and FIG. 10 is a front view showing a cross section of a joint between the SRC reinforcing column unit 5 and the RC reinforcing column unit 15 at the boundary between the SRC reinforcing column / beam portion and the RC reinforcing column / beam portion of the outer frame 2. 11 is an enlarged view of the joint portion (B) of FIG. 10, and FIG. 12 is a cross-sectional view of a joint portion of the existing building 1 and the RC reinforcing beam unit 16 by the joint slab 7 for transmitting a horizontal shearing force.

図13は、縦PC鋼材8の上端部付近及び中間継手付近を示す一部縦断側面図、図14(a)は、横PC鋼材10の一端部付近を示す縦断正面図、(b)は、防錆処理をした状態を示す縦断正面図である。   FIG. 13 is a partially longitudinal side view showing the vicinity of the upper end portion of the vertical PC steel material 8 and the vicinity of the intermediate joint, FIG. 14A is a longitudinal front view showing the vicinity of one end portion of the horizontal PC steel material 10, and FIG. It is a vertical front view which shows the state which performed the rust prevention process.

外フレーム2の施工態様の概要を説明する。図3、図4に示すように既存建物1の外側に近接して補強基礎部13を構築する。次に補強基礎部13に所定の間隔をあけて、既存建物1の下層部の鉄骨11と鉄筋コンクリートによるSRC造に対応する、SRC補強柱ユニット5を最下段から順次上方に継ぎ足す。その接合手段は、SRC補強柱ユニット5の肉厚部に埋設の縦鉄骨12(図5)によって上下多段の複数のSRC補強柱ユニット5同士を溶接またはボルトで接合してSRC補強柱5aを構築する。SRC補強柱ユニット5の設置はクレーンで吊り降ろして行う。   An outline of the construction mode of the outer frame 2 will be described. As shown in FIGS. 3 and 4, the reinforcement foundation 13 is constructed in the vicinity of the outside of the existing building 1. Next, the SRC reinforcement column unit 5 corresponding to the SRC construction by the steel frame 11 and the reinforced concrete of the lower layer part of the existing building 1 is sequentially added upward from the lowest stage with a predetermined interval in the reinforcement foundation part 13. As for the joining means, a plurality of SRC reinforcing column units 5 in the upper and lower stages are joined together by welding or bolts with the vertical steel frame 12 (FIG. 5) embedded in the thick part of the SRC reinforcing column unit 5 to construct the SRC reinforcing column 5a. To do. The SRC reinforcing column unit 5 is installed by hanging it with a crane.

横方向に間隔をおいて最下段のSRC補強柱ユニット5を複数設置した後、隣り合うSRC補強柱ユニット5の間にSRC補強梁ユニット6をクレーンで吊り降ろして所定の高さ位置に保持した上、SRC補強梁ユニット6とSRC補強柱ユニット5の肉厚部を水平方向に挿通する横鉄骨14(図5)を突き合わせて溶接またはボルトにより接合し、上下の各段ごとにSRC補強梁6aを構築する。   After installing a plurality of lowermost SRC reinforcing column units 5 at intervals in the horizontal direction, the SRC reinforcing beam units 6 are suspended between adjacent SRC reinforcing column units 5 by a crane and held at a predetermined height position. The horizontal steel frame 14 (FIG. 5) inserted in the horizontal direction through the thick portions of the SRC reinforcing beam unit 6 and the SRC reinforcing column unit 5 is abutted and welded or joined by bolts, and the SRC reinforcing beam 6a is provided for each of the upper and lower stages. Build up.

既存建物1におけるSRC造の下層部の耐震補強が終わったならば、次に、RC造の上層部の耐震補強を行う。このときは既存建物1のRC造に対応する、RC補強柱ユニット15をSRC補強柱5の上部に順次上方に継ぎ足す。上下複数のRC補強柱ユニット15同士の接合は、該ユニットの肉厚部を挿通する縦PC鋼材8(図9)によって行い全体でRC補強柱15aを構築する。RC補強柱ユニット15の設置はクレーンで吊り降ろして行う。   If the seismic reinforcement of the lower layer part of the SRC structure in the existing building 1 is finished, the seismic reinforcement of the upper layer part of the RC structure is performed next. At this time, the RC reinforcing column unit 15 corresponding to the RC structure of the existing building 1 is sequentially added upward to the upper portion of the SRC reinforcing column 5. The plurality of upper and lower RC reinforcing column units 15 are joined together by the vertical PC steel material 8 (FIG. 9) inserted through the thick part of the units to construct the RC reinforcing column 15a as a whole. The RC reinforcing column unit 15 is installed by hanging it with a crane.

横方向に間隔をおいてRC補強柱ユニット15を設置しながら、RC補強梁ユニット16をクレーンで吊り降ろし、隣り合うRC補強柱ユニット15の間で所定の高さ位置に保持した上、その肉厚部を水平方向に挿通する横PC鋼材10により接合し、上下の各段ごとにRC補強柱ユニット15とRC補強梁ユニット16を一体的に接合してRC補強梁6aを構築する。   While installing the RC reinforcing column units 15 at intervals in the horizontal direction, the RC reinforcing beam unit 16 is suspended by a crane and held at a predetermined height position between adjacent RC reinforcing column units 15, and its meat The thick portion is joined by the horizontal PC steel material 10 inserted in the horizontal direction, and the RC reinforcing column unit 15 and the RC reinforcing beam unit 16 are integrally joined to each of the upper and lower stages to construct the RC reinforcing beam 6a.

前記のようにして上下左右に設置される複数のSRC補強柱ユニット5とSRC補強梁ユニット6および、RC補強柱ユニット15とRC補強梁ユニット16を接合して外フレーム2を構成した後、外フレーム5と既存建物1との間を水平せん断力伝達用の接合スラブ7(図12)により接合して既存建物1の耐震補強を完成する。   After the plurality of SRC reinforcing column units 5 and the SRC reinforcing beam units 6 and the RC reinforcing column unit 15 and the RC reinforcing beam unit 16 which are installed in the vertical and horizontal directions as described above are joined to form the outer frame 2, The frame 5 and the existing building 1 are joined by a joining slab 7 (FIG. 12) for transmitting horizontal shearing force to complete the seismic reinforcement of the existing building 1.

各部の構造形態をより詳しく説明する。   The structure of each part will be described in more detail.

図3と図4を参照して、補強基礎部13の構造形態を説明する。既存建物1は、中高層などの鉄筋コンクリート造共同住宅等であり、その外壁17に近接するように地盤18に鉄筋コンクリート製杭等の基礎杭19が左右方向に間隔をおいて、既存建物1と平行に設けられ、基礎杭19の上部に新基礎22が設けられる。なお、新基礎22は、基礎杭19を省略して直接基礎としてもよく、地盤条件および既設建物1が低層・中高層であるかの条件により、布基礎または独立基礎にするかをも含めて適宜設定される。新基礎22の上にH形鋼などの横鉄骨14が配置されたプレキャスト鉄骨鉄筋コンクリート製(SRC造)の基礎梁23が載置される。SRC基礎梁23の上に最下段のSRC補強柱ユニット5が間隔をおいて、かつ垂直に建て込まれる。SRC補強柱ユニット5に配置の縦鉄骨12の下端はSRC基礎梁23の横鉄骨14に溶接またはボルトで接合される。互いに接合する縦、横の各鉄骨12、14の露出した部位は現場打ちの接合部鉄筋コンクリート20で被覆される。   With reference to FIG. 3 and FIG. 4, the structural form of the reinforcement base part 13 is demonstrated. The existing building 1 is a reinforced concrete apartment house such as a mid-to-high-rise building, and a foundation pile 19 such as a reinforced concrete pile is spaced in the horizontal direction on the ground 18 so as to be close to the outer wall 17, and in parallel with the existing building 1. The new foundation 22 is provided on the upper part of the foundation pile 19. The new foundation 22 may be a direct foundation by omitting the foundation pile 19 and appropriately including whether it is a cloth foundation or an independent foundation depending on the ground conditions and whether the existing building 1 is a low-rise / medium-high rise. Is set. A foundation beam 23 made of precast steel reinforced concrete (SRC structure) in which a horizontal steel frame 14 such as an H-shaped steel is arranged on a new foundation 22 is placed. On the SRC foundation beam 23, the lowermost SRC reinforcing column unit 5 is vertically built with an interval. The lower end of the vertical steel frame 12 arranged in the SRC reinforcing column unit 5 is joined to the horizontal steel frame 14 of the SRC foundation beam 23 by welding or bolts. The exposed portions of the vertical and horizontal steel frames 12 and 14 to be joined to each other are covered with the in-situ bonded reinforced concrete 20.

さらに図4において、SRC基礎梁23と既存建物1との間には鉄筋コンクリート製の土間スラブ21が構築され、その上部に現場打ちコンクリートによる基礎部接合スラブ24が構築される。基礎部接合スラブ24は、例えば、SRC基礎梁23の側に現場施工で設置したインサート金具25に継手鉄筋26が固着され、既存建物1の側には横孔を穿設して設けた後施工アンカー筋(ケミカルアンカー)27が結合され、両鉄筋26、27の間に連結鉄筋28を配置したうえ、コンクリートを現場打ちで施工することで構築される。そして、この基礎部接合スラブ24を介して、SRC基礎梁23と既存建物1の間は水平力によるせん断力を伝達可能に結合される。SRC基礎梁23の上面には、既述した最下段のSRC補強柱ユニット5が既存建物1の外面と平行にして建て込まれる。   Further, in FIG. 4, a reinforced concrete soil slab 21 is constructed between the SRC foundation beam 23 and the existing building 1, and a foundation joint slab 24 made of cast-in-place concrete is constructed on the top. The base joint slab 24 is, for example, a post-installed structure in which a joint rebar 26 is fixed to an insert fitting 25 installed in the field construction on the SRC foundation beam 23 side, and a horizontal hole is formed on the existing building 1 side. An anchor bar (chemical anchor) 27 is connected, and a connecting bar 28 is arranged between the two reinforcing bars 26 and 27, and then the concrete is constructed on site. And via this foundation part joining slab 24, between the SRC foundation beam 23 and the existing building 1, it couple | bonds so that the shearing force by a horizontal force can be transmitted. On the upper surface of the SRC foundation beam 23, the lowest SRC reinforcing column unit 5 described above is built in parallel with the outer surface of the existing building 1.

図5に示すように、SRC補強柱ユニット5のコンクリート内部において、H形鋼からなる縦鉄骨12と横鉄骨14が溶接により十文字状に構成されており、縦鉄骨12の上部と下部と、横鉄骨14の両端部は、他の柱・梁ユニット同士の溶接またはボルト接合作業のため、鉄筋コンクリート本体29の上下端部及び両端部から所定寸法突出させている。   As shown in FIG. 5, inside the concrete of the SRC reinforcing column unit 5, a vertical steel frame 12 and a horizontal steel frame 14 made of H-shaped steel are formed in a cross shape by welding. Both ends of the steel frame 14 are protruded by predetermined dimensions from the upper and lower ends and both ends of the reinforced concrete main body 29 for welding or bolting operations between other columns and beam units.

そして図5、図6のように、下側のSRC補強柱ユニット5の上部に突出した縦鉄骨12の上端部と上側のSRC補強柱ユニット5の下部に突出した縦鉄骨12の下端部とを突き合わせ、突合せ部31を跨って両縦鉄骨12の上下フランジの両面を挟んで接合プレート32を当てがい、接合部を挿通するボルト33によって両縦鉄骨12の間を接合する。その後、両縦鉄骨12のコンクリート本体から露出している部分を現場打ち鉄筋コンクリート34で被覆する。また、SRC補強柱ユニット5の横鉄骨14の端部とSRC補強梁ユニット6の横鉄骨12の端部とを突き合わせ、突合せ部31を跨って両横鉄骨14の上下フランジの上下面を挟んで接合プレート32を当てがい、接合部を挿通するボルト33によって両横鉄骨14の間を接合する。その後、両横鉄骨14のコンクリート本体から露出している部分を現場打ち鉄筋コンクリート34で被覆する。   Then, as shown in FIGS. 5 and 6, the upper end of the vertical steel frame 12 protruding above the lower SRC reinforcing column unit 5 and the lower end of the vertical steel frame 12 protruding below the upper SRC reinforcing column unit 5 are provided. The joining plate 32 is applied across both the upper and lower flanges of the two vertical steel frames 12 across the butting portion 31, and the two vertical steel frames 12 are joined by the bolts 33 inserted through the joint portions. Then, the part exposed from the concrete main body of both the vertical steel frames 12 is coat | covered with the in-situ reinforced concrete 34. FIG. Further, the end of the horizontal steel frame 14 of the SRC reinforcing column unit 5 and the end of the horizontal steel frame 12 of the SRC reinforcing beam unit 6 are abutted, and the upper and lower surfaces of the upper and lower flanges of both horizontal steel frames 14 are sandwiched across the butted portion 31. The joining plate 32 is applied, and both the transverse steel frames 14 are joined by the bolts 33 inserted through the joining portion. Then, the part exposed from the concrete main body of both horizontal steel frames 14 is coat | covered with the in-situ reinforced concrete 34. FIG.

既存建物1とSRC補強梁ユニット6ととの接合は、例えば図8に示すように、現場打ちコンクリートによる接合スラブ7で行う。同図において、既存建物1に設けてあるベランダ、廊下などの既存スラブ35の立ち上がり部41を解体すると共に、既存スラブ35にコンクリート打設孔36を開設し、既存建物1の梁37側から継手鉄筋38を伸ばすと共に、SRC補強梁ユニット6から継手鉄筋39を伸ばし、両継手鉄筋38、39を埋設するように、打設孔36から現場打ちコンクリート40を打設して接合スラブ7を構築する。この接合スラブ7の構築手段は一例であって、前記以外の現場打ちコンクリート工法で接合スラブを構築するのは構わない。   The existing building 1 and the SRC reinforcing beam unit 6 are joined by a joining slab 7 made of cast-in-place concrete, for example, as shown in FIG. In the figure, the rising portion 41 of the existing slab 35 such as a veranda or a corridor provided in the existing building 1 is disassembled, and a concrete placement hole 36 is opened in the existing slab 35, and a joint is formed from the beam 37 side of the existing building 1. The joint slab 7 is constructed by extending the reinforcing bar 38, extending the joint reinforcing bar 39 from the SRC reinforcing beam unit 6, and driving the cast-in-place concrete 40 from the driving hole 36 so as to embed both joint reinforcing bars 38 and 39. . The means for constructing the joint slab 7 is an example, and it is possible to construct the joint slab by an on-site concrete method other than the above.

SRC補強柱ユニット5とSRC補強梁ユニット6の各段を組立てる施工順は現場での最適の施工手順を選択して実施して構わない。   The order of construction for assembling each stage of the SRC reinforcing column unit 5 and the SRC reinforcing beam unit 6 may be carried out by selecting an optimum construction procedure at the site.

次に、図9以下を参照して、RC補強柱ユニット15とRC補強梁ユニット16の接合構造を説明する。RC補強柱ユニット15は、その厚みの断面内部に縦シースと横シースを厚み方向に位置をずらして埋設することによって形成した縦挿通孔42と横挿通孔43に、それぞれ縦PC鋼材8との横PC鋼材10を挿通して上下左右に貫通させる。RC補強梁ユニット16は、その厚みの断面内に横シースを埋設して形成した横挿通孔43に横PC鋼材10を挿通させる。この縦PC鋼材8で上下のRC補強柱ユニット15同士が接合され、横PC鋼材10で補強柱ユニット15とRC補強梁ユニット16が横方向に接合される。   Next, with reference to FIG. 9 and subsequent figures, a joint structure between the RC reinforcing column unit 15 and the RC reinforcing beam unit 16 will be described. The RC reinforcing column unit 15 has a longitudinal insertion hole 42 and a transverse insertion hole 43 formed by embedding the longitudinal sheath and the transverse sheath while shifting the position in the thickness direction inside the cross section of the thickness. The horizontal PC steel material 10 is inserted and penetrated vertically and horizontally. The RC reinforcing beam unit 16 allows the horizontal PC steel material 10 to be inserted into a horizontal insertion hole 43 formed by embedding a horizontal sheath in the cross section of the thickness. The vertical PC steel member 8 joins the upper and lower RC reinforcing column units 15 to each other, and the horizontal PC steel member 10 joins the reinforcing column unit 15 and the RC reinforcing beam unit 16 in the lateral direction.

SRC補強側の最上部に位置するSRC補強柱ユニット5とRC補強側の最下部に位置するRC補強柱ユニット15との接合は、例えば図9、図10に示す手段で行われる。各図において、最上部のSRC補強柱ユニット5のコンクリート部から突出した縦鉄骨12の上端に接合プレート44が溶接されている。そして、最下部のRC補強柱ユニット15のコンクリートから突出した縦PC鋼材8の端部を接合プレート44に開設の挿通孔に挿入し、縦PC鋼材8の先端のねじ部にナット45をねじ込み、接合プレート44の下面から締結することで、SRC補強柱ユニット5とRC補強柱ユニット15を接合できる。その後、縦鉄骨12の露出している部分を現場打ち鉄筋コンクリート34で被覆する。   The joining of the SRC reinforcing column unit 5 positioned at the uppermost part on the SRC reinforcing side and the RC reinforcing column unit 15 positioned at the lowermost side on the RC reinforcing side is performed by means shown in FIGS. 9 and 10, for example. In each figure, the joining plate 44 is welded to the upper end of the vertical steel frame 12 protruding from the concrete portion of the uppermost SRC reinforcing column unit 5. Then, the end portion of the vertical PC steel member 8 protruding from the concrete of the RC reinforcing column unit 15 at the bottom is inserted into the insertion hole opened in the joining plate 44, and the nut 45 is screwed into the screw portion at the tip of the vertical PC steel member 8, By fastening from the lower surface of the joining plate 44, the SRC reinforcing column unit 5 and the RC reinforcing column unit 15 can be joined. Thereafter, the exposed portion of the vertical steel frame 12 is covered with the cast-in-place reinforced concrete 34.

図9、図10に示すように、クレーンなどの重機を用いて最下段のRC補強柱ユニット15を吊り降ろし、最上段のSRC補強柱ユニット5に接合して建て込みながら、隣り合うRC補強柱ユニット16間にRC補強梁ユニット16を吊り降ろし、RC補強柱ユニット15の出張り部15bに架設し、各ユニットの挿通孔43に横PC鋼材10を挿通し、緊張一体化する。最下段列のRC補強柱ユニット15とRC補強梁ユニット16の建て込みが終わったら、第2段目のRC補強柱ユニット15とRC補強梁ユニット16の建て込みを行う。以後、その工程を繰り返してRC補強柱ユニット15とRC補強梁ユニット16を組み上げ、縦PC鋼材8と横PC鋼材10で一体化する。   As shown in FIGS. 9 and 10, the RC reinforcement column unit 15 at the lowermost stage is hung down by using a heavy machine such as a crane, and the adjacent RC reinforcement columns are installed while being joined and built in the SRC reinforcement column unit 5 at the uppermost stage. The RC reinforcing beam unit 16 is suspended between the units 16, is laid on the projecting portion 15 b of the RC reinforcing column unit 15, and the horizontal PC steel material 10 is inserted into the insertion hole 43 of each unit to be integrated with tension. When the RC reinforcing column unit 15 and the RC reinforcing beam unit 16 in the lowermost row are finished, the second RC reinforcing column unit 15 and the RC reinforcing beam unit 16 are installed. Thereafter, the process is repeated and the RC reinforcing column unit 15 and the RC reinforcing beam unit 16 are assembled and integrated with the vertical PC steel material 8 and the horizontal PC steel material 10.

上下段のRC補強柱ユニット15を複数の縦PC鋼材8によって継ぎ足す例を図13によって説明する。RC補強柱ユニット15内にシース46によって形成された縦挿通孔42に縦PC鋼材88が挿通され、この縦PC鋼材8にカプラー47が介在されて新たな縦PC鋼材8の上方に継ぎ足され、RC補強柱ユニット6の上端面に適宜高さ調整用モルタル48が設けられる。縦PC鋼材8はナット等の定着金具49による緊張定着を行う。最上段のRC補強柱ユニット16に挿通された縦PC鋼材8の上端部は、緊張装置(図示省略)により縦PC鋼材8の全体が所定の値に緊張された状態で、図13の上部に示すように、縦PC鋼材8の上端部の凹部50内の上面に係合されたナット等の定着金具49により定着され、前記凹部50内に充填された防食材料51により防食処理される。   An example in which the upper and lower RC reinforcing column units 15 are added by a plurality of vertical PC steel members 8 will be described with reference to FIG. A vertical PC steel material 88 is inserted into the vertical insertion hole 42 formed by the sheath 46 in the RC reinforcing column unit 15, and a coupler 47 is interposed in the vertical PC steel material 8 to be added above the new vertical PC steel material 8. A height adjusting mortar 48 is appropriately provided on the upper end surface of the RC reinforcing column unit 6. The vertical PC steel 8 is tension-fixed by a fixing bracket 49 such as a nut. The upper end portion of the vertical PC steel material 8 inserted through the uppermost RC reinforcing column unit 16 is in a state where the entire vertical PC steel material 8 is tensioned to a predetermined value by a tension device (not shown). As shown in the figure, a fixing metal fitting 49 such as a nut engaged with the upper surface in the recess 50 at the upper end of the vertical PC steel 8 is fixed, and the anticorrosion treatment is performed by the anticorrosion material 51 filled in the recess 50.

また、横PC鋼材10の端部は、図14(a)、(b)に示すように、端部RC補強柱ユニット15eの側面の凹部50において、ナット等の定着金具49により定着され、凹部50にモルタル等の防食材料51を充填して埋め込まれ防錆処理が施される。   Further, as shown in FIGS. 14A and 14B, the end portion of the horizontal PC steel material 10 is fixed by a fixing metal fitting 49 such as a nut in the recess portion 50 on the side surface of the end RC reinforcing column unit 15 e. 50 is filled with an anticorrosive material 51 such as mortar and embedded, and subjected to rust prevention treatment.

RC補強柱ユニット15とRC補強梁ユニット16の各段を組立てる施工順と、これらに縦PC鋼材8と横PC鋼材10を挿通し、プレストレスを導入する施工手順は現場での最適の施工手順を選択して実施して構わない。   The construction sequence for assembling the steps of the RC reinforcing column unit 15 and the RC reinforcing beam unit 16 and the construction procedure for introducing the prestress by inserting the vertical PC steel material 8 and the transverse PC steel material 10 into these are the optimum construction procedures in the field. You may choose to implement.

RC補強梁ユニット16と既存建物1との接合は、図12に示すように、例えば、現場打ちコンクリートによる接合スラブ7で行う。同図の例では、既存建物1に設けてあるベランダ、廊下などの既存スラブ35の立ち上がり部41を解体すると共に、既存スラブ35にコンクリート打設孔36を開設し、既存建物1の梁37側から継手鉄筋38を伸ばすと共に、RC補強梁ユニット16から継手鉄筋39を伸ばし、両継手鉄筋38、39を埋設するように、打設孔36から現場打ちコンクリート40を打設して接合スラブ7を構築する。この接合スラブ7の構築手段は一例であって、前記以外の現場打ちコンクリート以外の工法で接合スラブを構築するのは構わない。例えば、RC補強梁ユニット16と一体に型枠兼用のプレキャスト版を用いて現場打ちコンクリート40を打設して接合スラブを構築してもよい。さらに、接合スラブ中にPC鋼材を挿通し、RC補強梁ユニット16と既存建物1を定着部として前記接合スラブにプレストレスを導入するように設けてもよい。   As shown in FIG. 12, the RC reinforcing beam unit 16 and the existing building 1 are joined by, for example, a joint slab 7 made of cast-in-place concrete. In the example of the figure, the rising portion 41 of the existing slab 35 such as a veranda or a corridor provided in the existing building 1 is dismantled, and a concrete placement hole 36 is opened in the existing slab 35, and the beam 37 side of the existing building 1 is opened. The joint rebar 38 is extended from the RC reinforcing beam unit 16, and the joint reinforcing bar 39 is extended from the RC reinforcing beam unit 16. To construct. The means for constructing the joint slab 7 is an example, and the joint slab may be constructed by a construction method other than the above-described in-situ concrete. For example, the joint slab may be constructed by placing the cast-in-place concrete 40 integrally with the RC reinforcing beam unit 16 using a precast plate that also serves as a formwork. Further, a PC steel material may be inserted into the joint slab so as to introduce prestress into the joint slab using the RC reinforcing beam unit 16 and the existing building 1 as a fixing portion.

また、SRC補強柱ユニット5とSRC補強梁ユニット6とプレキャストコンクリート(PCa)製の補強柱ユニットとPC製補強梁ユニット(何れも図示省略する)の組合わせで補強外フレームを構成してもよい。この場合は、各柱・梁ユニットから連結筋を突出させこの連結筋を介して柱・梁ユニット同士を緊張連結し、その周囲に接合コンクリートを打設して接合部を構成してもよい。
The SRC reinforcing column unit 5, the SRC reinforcing beam unit 6, a precast concrete (PCa) reinforcing column unit, and a PC reinforcing beam unit (both not shown) may be used to form a reinforcing outer frame. . In this case, connecting bars may be formed by projecting connecting bars from each column / beam unit, connecting the pillars / beam units to each other via the connecting bars, and placing joint concrete around them.

本発明に係る外フレームによって建物の下層部を補強した既存建物の側面図である。It is a side view of the existing building which reinforced the lower layer part of the building with the outer frame concerning the present invention. 図1の平面図である。It is a top view of FIG. 既存建物と外フレームを一体化した縦断側面図である。It is a vertical side view which integrated the existing building and the outer frame. 図3の補強基礎部の拡大断面図である。It is an expanded sectional view of the reinforcement base part of FIG. プレキャストコンクリート製のSRC補強柱ユニットとSRC補強梁ユニットを結合して外フレームを構築する態様を示す拡大斜視図である。It is an expansion perspective view which shows the aspect which couple | bonds the SRC reinforcement pillar unit made from precast concrete, and an SRC reinforcement beam unit, and construct | assembles an outer frame. SRC補強柱ユニットとSRC補強梁ユニットを接合した正面図で、継手部を断面で示す。It is a front view which joined the SRC reinforcement pillar unit and the SRC reinforcement beam unit, and shows a joint part with a section. (a)は、図6の継手部の拡大図、(b)は同図(a)のA−A断面図である。(A) is an enlarged view of the joint part of FIG. 6, (b) is AA sectional drawing of the figure (a). 既存建物のSRC造の梁とSRC製補強梁ユニットの水平せん断力伝達用の接合スラブによる取り合い部を示す断面図である。It is sectional drawing which shows the connection part by the joining slab for horizontal shearing force transmission of the beam of SRC structure of an existing building, and the reinforcement beam unit made from SRC. プレキャストコンクリート製のRC補強柱ユニットとRC補強梁ユニットを結合して外フレームを構築する態様を示す拡大斜視図である。It is an expansion perspective view which shows the aspect which couple | bonds the RC reinforcement pillar unit and RC reinforcement beam unit made from precast concrete, and construct | assembles an outer frame. RC補強柱ユニットとRC補強梁ユニットを接合した正面図で、継手部を断面で示す。It is a front view which joined RC reinforcement pillar unit and RC reinforcement beam unit, and shows a joint part with a section. 図10の一部拡大図である。FIG. 11 is a partially enlarged view of FIG. 10. 既存建物のRC造の梁とRC製補強梁ユニットの水平せん断力伝達用の接合スラブによる取り合い部を示す断面図である。It is sectional drawing which shows the connection part by the joining slab for horizontal shearing force transmission of the RC beam and RC reinforcement beam unit of the existing building. 縦PC鋼材の上端部付近及び中間継手付近を示す一部縦断側面図である。It is a partially vertical side view showing the vicinity of the upper end portion of the vertical PC steel material and the vicinity of the intermediate joint. (a)は、横PC鋼材の一端部付近を示す縦断正面図、(b)は、防錆処理をした状態を示す縦断正面図である。(A) is the longitudinal front view which shows the one end part vicinity of a horizontal PC steel material, (b) is a longitudinal front view which shows the state which performed the antirust process.

符号の説明Explanation of symbols

1 既存建物
2 外フレーム
3 建物の下層部
4 建物の上層部
5 SRC補強柱ユニット
5a SRC補強柱
6 SRC補強梁ユニット
6a SRC補強梁
6b 出張部
7 接合スラブ
8 縦PC鋼材
10 横PC鋼材
11 鉄骨
12 縦鉄骨
13 補強基礎部
14 横鉄骨
15 RC補強柱ユニット
15a RC補強柱
16 RC補強梁ユニット
16a RC補強梁
17 外壁
18 地盤
20 接合部鉄筋コンクリート
21 土間スラブ
22 新基礎梁
23 SRC基礎梁
24 基礎部接合スラブ
25 インサート金具
26 継手鉄筋
27 後施工アンカー筋
28 連結鉄筋
29 鉄筋コンクリート本体
30 鉄筋コンクリート本体
31 突合せ部
32 接合プレート
33 ボルト
34 現場打ち鉄筋コンクリート
35 既存スラブ
36 コンクリート打設孔
37 既存建物の梁
38 継手鉄筋
39 継手鉄筋
40 現場打ちコンクリート
41 立ち上がり部
42 縦挿通孔
43 横挿通孔
44 接合プレート
45 ナット
46 シース
47 カプラー
48 高さ調整用モルタル
49 定着金具
50 凹部
DESCRIPTION OF SYMBOLS 1 Existing building 2 Outer frame 3 Lower layer part 4 Building upper layer part 5 SRC reinforcement pillar unit 5a SRC reinforcement pillar 6 SRC reinforcement beam unit 6a SRC reinforcement beam 6b Business trip part
7 Bonded slab 8 Vertical PC steel 10 Horizontal PC steel
DESCRIPTION OF SYMBOLS 11 Steel frame 12 Vertical steel frame 13 Reinforcement foundation part 14 Horizontal steel frame 15 RC reinforcement pillar unit 15a RC reinforcement pillar 16 RC reinforcement beam unit 16a RC reinforcement beam 17 Outer wall 18 Ground 20 Junction reinforced concrete 21 Soil slab 22 New foundation beam 23 SRC foundation beam 24 Foundation joint slab 25 Insert metal fitting 26 Joint reinforcement 27 Post-construction anchor 28 Joint reinforcement 29 Reinforced concrete main body 30 Reinforced concrete main body 31 Butting part 32 Joint plate 33 Bolt 34 In-situ reinforced concrete 35 Existing slab 36 Concrete placement hole 37 Beam 38 in existing building Joint reinforcing bar 39 Joint reinforcing bar 40 Cast-in-place concrete 41 Standing part 42 Vertical insertion hole 43 Horizontal insertion hole 44 Joining plate 45 Nut 46 Sheath 47 Coupler 48 Height adjustment mortar 49 Fixing bracket 50 Recess

Claims (9)

SRC造の既存建物の耐震補強外フレーム工法であって、外フレームを複数の補強柱ユニットと補強梁ユニットを組み立てて構成し、前記補強柱・梁ユニットは、既存建物のSRC造の外側部位では、プレキャスト製のSRC補強柱ユニット及びSRC補強梁ユニットで構成したうえ、それぞれの柱・梁ユニットに設けた縦鉄骨と横鉄骨同士を接合して相互間を一体化し、既存建物と外フレームとは現場施工の接合スラブでせん断力を伝達可能に接合したことを特徴とする耐震補強外フレームの構築工法。 A seismic reinforcement outer frame method for an existing building of SRC structure, wherein the outer frame is constructed by assembling a plurality of reinforcing column units and reinforcing beam units, and the reinforcing column / beam unit is located at the outer part of the SRC structure of the existing building. In addition to the precast SRC reinforced column unit and SRC reinforced beam unit, the vertical and horizontal steel frames provided in each column / beam unit are joined together to integrate the existing building and the outer frame. A construction method for an anti-seismic reinforced outer frame, characterized in that shearing force can be transmitted with a joint slab on site. 下層部がSRC造で上層部がRC造の既存建物の耐震補強外フレーム工法であって、外フレームを複数の補強柱ユニットと補強梁ユニットを組み立てて構成し、前記補強柱・梁ユニットは、既存建物のSRC造の外側部位では、プレキャスト製のSRC補強柱ユニット及びSRC補強梁ユニットで構成したうえ、それぞれの柱・梁ユニットに設けた縦鉄骨と横鉄骨同士を接合して相互間を一体化し、既存建物のRC造の外側部位ではプレキャスト製のRC補強柱ユニットとRC補強梁ユニットで構成したうえ、それぞれの内部を挿通する縦PC鋼材と横PC鋼材にて各補強柱・梁ユニット相互を緊張一体化し、既存建物と外フレームとは現場施工の接合スラブでせん断力を伝達可能に接合したことを特徴とする耐震補強外フレームの構築工法。 It is a seismic reinforcement outer frame method for an existing building whose lower layer part is SRC and upper layer part is RC. The outer frame is constructed by assembling a plurality of reinforcing column units and reinforcing beam units. The outer part of the SRC structure of the existing building is composed of precast SRC reinforced column units and SRC reinforced beam units, and the vertical and horizontal steel frames provided in each column / beam unit are joined together to integrate each other. The outer part of the RC building of the existing building is composed of precast RC reinforced column units and RC reinforced beam units, and each column and beam unit is made up of vertical PC steel and horizontal PC steel inserted through each interior. The construction method of the seismic reinforced outer frame is characterized by the fact that the existing building and the outer frame are joined to each other so that shearing force can be transmitted with a joint slab on site. 前記SRC補強柱ユニットのコンクリート本体の上下部と側部から縦鉄骨と横鉄骨を突出させると共に、前記SRC補強梁ユニットのコンクリート本体の側部から横鉄骨を突出させ、前記縦鉄骨同士を突き合わせて接合し、かつ、その外側に鉄筋コンクリートを打設して上下の補強柱ユニットを接合し、前記横鉄骨同士を突き合わせて接合し、かつ、その外側に鉄筋コンクリートを打設して横方向の補強柱ユニットと補強梁ユニットを接合することを特徴とする請求項1または2記載の耐震補強外フレームの構築工法。 A vertical steel frame and a horizontal steel frame protrude from the upper and lower parts and sides of the concrete body of the SRC reinforcing column unit, and a horizontal steel frame protrudes from the side of the concrete body of the SRC reinforcing beam unit, and the vertical steel frames are brought into contact with each other. Reinforced concrete is placed on the outside and the upper and lower reinforcing column units are joined, the horizontal steel frames are butted against each other, and the reinforced concrete is placed on the outside to reinforce the lateral reinforcing column unit. The construction method of an outer frame for seismic reinforcement according to claim 1 or 2, wherein the reinforcing beam unit and the reinforcing beam unit are joined. 前記RC補強柱ユニットのコンクリート本体を上下方向に貫通する縦PC鋼材によって上下のRC補強柱ユニットを緊張して接合一体化すると共に、RC補強柱ユニットとRC補強梁ユニットのコンクリート本体を横方向に貫通する横PC鋼材によってRC補強柱ユニットとRC補強柱ユニットを緊張して接合一体化することを特徴とする請求項2記載の耐震補強外フレームの構築工法。 The vertical RC steel column that vertically penetrates the concrete body of the RC reinforcing column unit is joined and integrated by tensioning the upper and lower RC reinforcing column units, and the concrete body of the RC reinforcing column unit and the RC reinforcing beam unit are laterally arranged. The construction method of the seismic reinforcement outer frame according to claim 2, wherein the RC reinforcing column unit and the RC reinforcing column unit are tensioned and joined together by a transverse PC steel material penetrating therethrough. 下層部がSRC造で上層部がRC造の既存建物の耐震補強外フレーム工法であって、外フレームを複数の補強柱ユニットと補強梁ユニットを組み立てて構成し、前記補強柱・梁ユニットは、既存建物のSRC造の外側部位では、プレキャスト製のSRC補強柱ユニット及びSRC補強梁ユニットで構成したうえ、それぞれの柱・梁ユニットに設けた縦鉄骨と横鉄骨同士を接合して相互間を一体化し、既存建物のRC造の外側部位ではプレキャスト(PCa)製の補強柱ユニットとプレキャスト(PCa)製の補強梁ユニットで構成したうえ、各補強柱・梁ユニット相互を各部材から突出させた連結筋を介して緊張一体化すると共にその周囲に接合部コンクリートを打設し、既存建物と外フレームとは現場施工の接合スラブでせん断力を伝達可能に接合したことを特徴とする耐震補強外フレームの構築工法。 It is a seismic reinforcement outer frame method for an existing building whose lower layer part is SRC and upper layer part is RC. The outer frame is constructed by assembling a plurality of reinforcing column units and reinforcing beam units. The outer part of the SRC structure of the existing building is composed of precast SRC reinforced column units and SRC reinforced beam units, and the vertical and horizontal steel frames provided in each column / beam unit are joined together to integrate each other. In the existing building, the RC part is composed of precast (PCa) reinforced column units and precast (PCa) reinforced beam units, and each reinforced column / beam unit is protruded from each member. Tension integration is performed through the muscles, and joint concrete is placed around it, and shear force can be transmitted between the existing building and the outer frame using a joint slab on site. Construction method of seismic retrofitting outer frame, characterized in that joined to. 前記接合スラブは、現場施工によるコンクリート打設で構築されていることを特徴とする請求項1〜5のいずれか1項記載の耐震補強外フレームの構築工法。 The construction method for an outer frame of seismic reinforcement according to any one of claims 1 to 5, wherein the joining slab is constructed by concrete placement by site construction. 前記接合スラブは、既存建物の梁部に後施工アンカーを施工しコンクリートを打設することで、若しくは前記コンクリートにPC鋼材でプレストレスを導入し既存建物と外フレームに圧着して構築することを特徴とする請求項1〜5の何れか1項記載の耐震補強外フレームの構築工法。 The joint slab is constructed by installing a post-installed anchor on the beam part of an existing building and placing concrete, or by introducing prestress to the concrete with PC steel and crimping the existing building and the outer frame. The construction method for an outer frame of seismic reinforcement according to any one of claims 1 to 5. 前記接合スラブは、外フレームに一体に設けた型枠兼用のプレキャスト版の上部にコンクリートを打設して構築することを特徴とする請求項1〜5の何れか1項記載の耐震補強外フレームの構築工法。 The seismic reinforced outer frame according to any one of claims 1 to 5, wherein the joining slab is constructed by placing concrete on an upper part of a precast plate also used as a formwork provided integrally with the outer frame. Construction method. 前記接合スラブは、既存建物に設けられたベランダや廊下・庇などの既存スラブの上側若しくは下側にコンクリートを打設し、せん断伝達金物を介してせん断力伝達可能に接合することを特徴とする請求項1〜5の何れか1項記載の耐震補強外フレームの構築工法。 The joining slab is characterized in that concrete is placed on the upper side or the lower side of an existing slab such as a veranda, a corridor, or a fence provided in an existing building, and is joined so as to be able to transmit a shearing force through a shear transmission hardware. The construction method of the seismic reinforcement outer frame in any one of Claims 1-5.
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