JP2009057761A - Existing building reinforcing structure, and existing building reinforcing method - Google Patents
Existing building reinforcing structure, and existing building reinforcing method Download PDFInfo
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Abstract
Description
本発明は、柱梁架構などにより囲まれた矩形状の開口を備えた既存建物を補強する構造及び方法に関する。 The present invention relates to a structure and method for reinforcing an existing building having a rectangular opening surrounded by a column beam frame or the like.
従来より、既存建物の柱梁架構内に沿って設けられた周辺枠と、周辺枠内に取り付けられたブレースとからなる補強構造を増設することにより既存建物の耐震補強を行う方法が用いられている。この方法では、既存躯体に打設したアンカーボルトにより枠材を既存建物の躯体に固定しているが、アンカーボルトを打設する際に騒音が発生するため、使用中の建物での施工は困難であった。 Conventionally, there has been used a method for seismic reinforcement of an existing building by adding a reinforcement structure consisting of a peripheral frame provided along the pillar beam frame of the existing building and a brace attached in the peripheral frame. Yes. In this method, the frame material is fixed to the frame of the existing building by anchor bolts placed in the existing frame, but noise is generated when the anchor bolts are placed, so it is difficult to install in the building in use. Met.
そこで、アンカーボルトを打設せずに鉄骨ブレースを設置する方法として、例えば、特許文献１には、既存建物の柱梁架構内に周辺枠を接着剤により接着し、この周辺枠内に鉄骨ブレースを設ける方法が記載されている。
しかしながら、周辺枠を製作するために用いられる設計上の寸法と既存躯体の実際の寸法との間に誤差があり、周辺枠と柱梁架構との間に大きな隙間が生じてしまったり、柱梁架構内に周辺枠が収まらなかったりする場合がある。このように周辺枠と柱梁架構との間で寸法の誤差が生じた場合には、柱梁架構と周辺枠との間の接着層を厚くしたり、柱梁架構を削るなどの調整を行うことにより、寸法の誤差を吸収しなければならず、施工に手間がかかるとともに、コスト高となるという問題がある。 However, there is an error between the design dimensions used to manufacture the peripheral frame and the actual dimensions of the existing frame, resulting in a large gap between the peripheral frame and the column beam frame. There are cases where the surrounding frame does not fit within the frame. In this way, when a dimensional error occurs between the peripheral frame and the column beam frame, make adjustments such as thickening the adhesive layer between the column beam frame and the peripheral frame, or cutting the column beam frame. Therefore, it is necessary to absorb the dimensional error, and there is a problem that the construction is troublesome and the cost is increased.
本発明は上記の問題に鑑みなされたものであり、その目的は、柱梁架構に沿って設けられた周辺枠と、周辺枠内に設けられたブレースとからなる補強構造を構築することにより既存躯体を補強する方法において、部材の寸法誤差を容易に吸収することができるようにすることである。 The present invention has been made in view of the above-described problems, and an object of the present invention is to construct a reinforcing structure including a peripheral frame provided along a column beam frame and a brace provided in the peripheral frame. In the method of reinforcing the housing, the dimensional error of the member can be easily absorbed.
本発明の既存建物の補強構造は、既存建物の矩形状の開口を囲む架構の前記開口の内周面のうち少なくとも上下の面に取り付けられた周辺部と、前記開口の上下に取り付けられた前記周辺部を接続するように設けられたブレース部と、により構成され、前記周辺部及び前記ブレース部にあたる部分に枠材を配置し、前記枠材と一体となるようにセメント系材料を打設してなる補強構造であって、前記枠材は前記開口の内周面のうち少なくとも上下の面に接着剤により接着されており、前記枠材は二つ以上に分割されており、前記分割された枠材の間で応力伝達可能な応力伝達部材が設けられていることを特徴とする。
上記の既存建物の補強構造において、前記周辺部は、前記開口の内面全周に沿って取りつけられていいてもよい。
The reinforcing structure of the existing building according to the present invention includes a peripheral portion attached to at least the upper and lower surfaces of the inner peripheral surface of the opening of the frame surrounding the rectangular opening of the existing building, and the above-described attached to the upper and lower sides of the opening. A brace part provided to connect the peripheral part, and a frame material is disposed on the peripheral part and the part corresponding to the brace part, and a cement-based material is placed so as to be integrated with the frame material. The frame material is bonded to at least the upper and lower surfaces of the inner peripheral surface of the opening with an adhesive, and the frame material is divided into two or more, and the divided A stress transmission member capable of transmitting stress between the frame members is provided.
In the reinforcing structure of the existing building, the peripheral portion may be attached along the entire inner circumference of the opening.
また、本発明の既存建物の補強構造は、既存建物の矩形状の開口を囲む架構の前記開口の内周面の上下の面に取り付けられるとともに、前記開口の両側面に沿って当該両側面との間にスリットを形成するように取り付けられた周辺部と、前記開口の上下に取り付けられた前記周辺部を接続するように設けられたブレース部材と、により構成され、前記周辺部及び前記ブレース部にあたる部分に枠材を配置し、前記枠材と一体となるようにセメント系材料を打設してなる前記既存建物の補強構造であって、前記枠材は前記開口の上下の面に接着剤により接着されており、前記枠材は少なくとも二つ以上に分割されており、前記分割された枠材の間で応力伝達可能な応力伝達部材が設けられていることを特徴とする。 Further, the reinforcing structure of the existing building of the present invention is attached to the upper and lower surfaces of the inner peripheral surface of the opening of the frame surrounding the rectangular opening of the existing building, and the both side surfaces along the both side surfaces of the opening. A peripheral part attached to form a slit between the peripheral part and a brace member provided to connect the peripheral part attached to the top and bottom of the opening, and the peripheral part and the brace part It is a reinforcing structure of the existing building in which a frame material is disposed in a corresponding portion and a cement-based material is cast so as to be integrated with the frame material, and the frame material is bonded to the upper and lower surfaces of the opening. The frame material is divided into at least two or more, and a stress transmission member capable of transmitting stress between the divided frame materials is provided.
また、前記枠材は、鋼管であってもよい。また、前記周辺部を構成する枠材は、内面にスタッドが取り付けられた溝形鋼であってもよい。
また、前記応力伝達部材は、隣接する前記分割された枠材の間に亘って前記セメント系材料に埋設された応力伝達筋であってもよく、隣接する前記分割された枠材に亘って取り付けられた板材であってもよい。
The frame material may be a steel pipe. Moreover, the frame material which comprises the said peripheral part may be the channel steel by which the stud was attached to the inner surface.
Further, the stress transmission member may be a stress transmission line embedded in the cement-based material between the adjacent divided frame members, and attached to the adjacent divided frame members. It may be a plate material.
また、本発明の既存建物の補強方法は、既存建物の矩形状の開口を囲む架構の前記開口の内周面のうち少なくとも上下の面に取り付けられた周辺部と、前記開口の上下に取り付けられた前記周辺部を接続するように設けられたブレース部と、により構成される補強構造を設けることにより既存建物を補強する方法であって、前記周辺部及び前記ブレース部にあたる部分に二つ以上に分割された枠材を配置するとともに、前記枠材を前記開口の内周面のうち少なくとも上下の面に接着剤により接着し、前記分割された枠材の間に応力伝達可能な応力伝達部材を設け、前記枠材と一体となるようにセメント系材料を打設することを特徴とする。 Further, the reinforcing method of the existing building of the present invention is attached to the peripheral part attached to at least the upper and lower surfaces of the inner peripheral surface of the opening of the frame surrounding the rectangular opening of the existing building, and to the upper and lower sides of the opening. A method of reinforcing an existing building by providing a reinforcing structure composed of a brace part provided to connect the peripheral part, and two or more parts corresponding to the peripheral part and the brace part A stress transmitting member that disposes the divided frame material, adheres the frame material to at least the upper and lower surfaces of the inner peripheral surface of the opening with an adhesive, and transmits stress between the divided frame materials. And a cement-based material is cast so as to be integrated with the frame member.
本発明によれば、分割された枠材の隙間の間隔を適宜調整することにより、寸法の誤差を吸収することが可能となる。 According to the present invention, it is possible to absorb dimensional errors by appropriately adjusting the gaps between the divided frame members.
以下、本発明の既存建物の補強構造の一実施形態を図面を参照しなら詳細に説明する。
図１は、本実施形態の鉄筋コンクリート造の既存建物の柱梁架構内に設けられた補強構造の構成を示す図であって、（Ａ）は正面図であり、（Ｂ）は断面図であり、（Ｃ）は（Ａ）におけるI−I´断面図であり、（Ｄ）は（Ａ）におけるII−II´断面図である。本実施形態の補強構造１０は、図１に示すように、梁３、床４及び柱２により囲まれる矩形状の開口５内に設置され、既存建物を耐震補強するものであり、鉄筋コンクリート造の柱梁架構１に沿って取り付けられた周辺枠２０と、周辺枠２０の上辺の中央部と、下方の両コーナー部とを結ぶように設けられた一対のブレース部材３０とにより構成される。
Hereinafter, an embodiment of a reinforcing structure for an existing building according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram showing a configuration of a reinforcing structure provided in a column beam frame of an existing building of reinforced concrete structure according to the present embodiment, where (A) is a front view and (B) is a cross-sectional view. (C) is II-I 'sectional drawing in (A), (D) is II-II' sectional drawing in (A). As shown in FIG. 1, the reinforcing structure 10 of this embodiment is installed in a rectangular opening 5 surrounded by a beam 3, a floor 4, and a pillar 2, and seismically reinforces an existing building. The peripheral frame 20 attached along the column beam frame 1, a pair of brace members 30 provided so as to connect the central portion of the upper side of the peripheral frame 20 and the lower corner portions.
周辺枠２０は、複数に分割された断面矩形状の角鋼管２１と、角鋼管２１内及び隣接する角鋼管２１の間の隙間に打設されたモルタルグラウト２２と、隣接する角鋼管２１の間に亘ってモルタルグラウト２２内に埋設された接合鉄筋２３と、により構成される。
角鋼管２１は柱梁架構１の開口５内側の面に沿って枠状に配置され、接着剤２５により接着されている。後述するように、角鋼管２１の間には隙間が設けられており、この隙間の幅を調整することにより、柱梁架構１に寸法誤差がある場合であっても、柱梁架構１に沿って角鋼管２１を枠状に取り付けることが可能となる。
The peripheral frame 20 includes a rectangular steel pipe 21 having a rectangular cross section divided into a plurality of sections, a mortar grout 22 placed in a gap between the square steel pipe 21 and the adjacent square steel pipes 21, and the adjacent square steel pipes 21. And a reinforcing bar 23 embedded in the mortar grout 22.
The square steel pipe 21 is arranged in a frame shape along the inner surface of the opening 5 of the column beam frame 1 and bonded by an adhesive 25. As will be described later, a gap is provided between the square steel pipes 21, and by adjusting the width of the gap, even if there is a dimensional error in the column beam frame 1, the gap along the column beam frame 1 is maintained. Thus, the square steel pipe 21 can be attached in a frame shape.
モルタルグラウト２２は、各角鋼管２１の内部及び隣接する角鋼管２１の隙間に打設されている。周辺枠２０に作用する圧縮荷重は主にモルタルグラウト２２が負担する。なお、モルタルグラウト２２は、角鋼管２１により囲繞されて、拘束されているため、圧縮耐力が向上されている。 The mortar grout 22 is placed inside each square steel pipe 21 and in a gap between adjacent square steel pipes 21. The compressive load acting on the peripheral frame 20 is mainly borne by the mortar grout 22. In addition, since the mortar grout 22 is surrounded and restrained by the square steel pipe 21, the compression yield strength is improved.
接合鉄筋２３は、隣接する角鋼管２１の間に亘ってモルタルグラウト２２内に埋設されている。隣接する角鋼管２１の一方に作用した応力は、鉄筋の重ね継手と同様に、モルタルグラウト２２を介して接合鉄筋２３に伝達され、接合鉄筋２３からモルタルグラウト２２を介して他方の角鋼管２１に伝達される。このようにして、隣り合う角鋼管２１の間での引張応力の伝達が可能となり、周辺枠２０に作用する引張応力を角鋼管２１及び接合鉄筋２３により負担することができる。 The joining rebar 23 is embedded in the mortar grout 22 across the adjacent square steel pipes 21. The stress acting on one of the adjacent square steel pipes 21 is transmitted to the joining rebar 23 via the mortar grout 22 and is transmitted from the joining rebar 23 to the other square steel pipe 21 via the mortar grout 22, similarly to the lap joint of the reinforcing bars. Communicated. In this way, the tensile stress can be transmitted between the adjacent square steel pipes 21, and the tensile stress acting on the peripheral frame 20 can be borne by the square steel pipe 21 and the joining rebar 23.
このように、周辺枠２０を構成する角鋼管２１、モルタルグラウト２２、及び接合鉄筋２３は一体となって、応力を負担することが可能となり枠状の構造として機能する。また、周辺枠２０は角鋼管２１の外周面が接着剤２５により柱梁架構１の内側の面に接着されており、柱梁架構１と一体となっている。 Thus, the square steel pipe 21, the mortar grout 22, and the joining rebar 23 constituting the peripheral frame 20 can be united to bear a stress and function as a frame-like structure. Further, the peripheral frame 20 has an outer peripheral surface of the square steel pipe 21 bonded to the inner surface of the column beam frame 1 with an adhesive 25, and is integrated with the column beam frame 1.
ブレース部材３０は、断面矩形状の鋼管３１と、鋼管３１内に充填され、鋼管３１と一体となって硬化したモルタルグラウト３２とから構成される。ブレース部材３０に作用する圧縮荷重は、主にモルタルグラウト３２が負担し、引張荷重は主に鋼管３１が負担する。さらに、鋼管３１がモルタルグラウト３２を囲繞した状態で拘束しているため、ブレース部材３０の圧縮耐力が向上されている。 The brace member 30 includes a steel pipe 31 having a rectangular cross section and a mortar grout 32 that is filled in the steel pipe 31 and hardened integrally with the steel pipe 31. The compressive load acting on the brace member 30 is mainly borne by the mortar grout 32, and the tensile load is mainly borne by the steel pipe 31. Further, since the steel pipe 31 is restrained in a state of surrounding the mortar grout 32, the compression strength of the brace member 30 is improved.
図２は、ブレース部材３０が接続される位置に配置された角鋼管２１Ａ、２１Ｂの構成を示す斜視図であり（Ａ）は下方のコーナー部に配置された角鋼管２１Ａを示し、（Ｂ）は、梁３の中央に取り付けられた角鋼管２１Ｂを示す。同図に示すように、角鋼管２１Ａ、２１Ｂのブレース部材３０が接続される位置に開口（図中斜線で示す）２１０Ａ，２１０Ｂが設けられて、これら開口２１０Ａ，２１０Ｂの両側には、ブレース部材３０を接続した際に、鋼管３１との間の隙間を塞ぐように板材２１１Ａ，２１１Ｂが取りつけられている。図１に示す構成において、周辺枠２０を構成するモルタルグラウト２２と、ブレース部材３０を構成するモルタルグラウト３２とは、角鋼管２１Ａ、２１Ｂの開口２１０Ａ，２１０Ｂを通して、一体となって硬化しており、ブレース部材３０と周辺枠２０との間で圧縮応力が伝達される。 FIG. 2 is a perspective view showing the configuration of the square steel pipes 21A and 21B arranged at the position to which the brace member 30 is connected. FIG. 2A shows the square steel pipe 21A arranged at the lower corner portion. These show the square steel pipe 21B attached to the center of the beam 3. FIG. As shown in the figure, openings (shown by hatching in the figure) 210A, 210B are provided at positions where the brace members 30 of the square steel pipes 21A, 21B are connected, and brace members are provided on both sides of these openings 210A, 210B. When connecting 30, plate members 211 </ b> A and 211 </ b> B are attached so as to close the gap between the steel pipe 31. In the configuration shown in FIG. 1, the mortar grout 22 constituting the peripheral frame 20 and the mortar grout 32 constituting the brace member 30 are integrally cured through the openings 210A and 210B of the square steel pipes 21A and 21B. The compressive stress is transmitted between the brace member 30 and the peripheral frame 20.
図１に示すように、ブレース部材３０及び周辺枠２０を構成するモルタルグラウト３２、２２には、これらの間に亘って応力伝達筋４０が埋設されている。これにより、鉄筋の継手構造と同様に、ブレース部材３０と周辺枠２０との間で引張応力の伝達が可能となる。 As shown in FIG. 1, in the mortar grouts 32 and 22 constituting the brace member 30 and the peripheral frame 20, a stress transmission line 40 is embedded between them. Thereby, transmission of the tensile stress between the brace member 30 and the peripheral frame 20 becomes possible as in the joint structure of reinforcing bars.
また、角鋼管２１Ａ、２１Ｂのブレース部材３０が接続される位置には大きな応力が作用するため、角鋼管２１Ａ、２１Ｂの内面にはスタッド２４が取付けられている。スタッド２４によりモルタルグラウト２２と角鋼管２１との付着力が向上されるため、ブレース部材３０と周辺枠２０とがより強固に接続されている。以上説明した構成により周辺枠２０とブレース部材３０とが強固に接続され、一体となって機能することとなる。 Moreover, since a big stress acts on the position where the brace member 30 of square steel pipe 21A, 21B is connected, the stud 24 is attached to the inner surface of square steel pipe 21A, 21B. Since the adhesion force between the mortar grout 22 and the square steel pipe 21 is improved by the stud 24, the brace member 30 and the peripheral frame 20 are more firmly connected. With the configuration described above, the peripheral frame 20 and the brace member 30 are firmly connected and function integrally.
既存建物に水平応力が作用すると柱梁架構１にせん断力が作用する。柱梁架構１に作用したせん断力は、柱梁架構１に取り付けられた周辺枠２０に伝達される。周辺枠２０にせん断力が作用すると、ブレース部材３０に圧縮力が生じるが、ブレース部材３０の圧縮耐力によりこのせん断力に対して抵抗する。このようにして、本実施形態の補強構造１０が柱梁架構１に作用するせん断力を負担するため、既存建物を耐震補強することができる。 When a horizontal stress acts on an existing building, a shearing force acts on the column beam frame 1. The shearing force acting on the column beam frame 1 is transmitted to the peripheral frame 20 attached to the column beam frame 1. When a shearing force acts on the peripheral frame 20, a compressive force is generated in the brace member 30, but the brace member 30 resists this shearing force due to the compressive strength of the brace member 30. Thus, since the reinforcement structure 10 of this embodiment bears the shearing force which acts on the column beam frame 1, the existing building can be seismically reinforced.
以下、このような補強構造１０を構築する方法を、図３〜図７を参照しながら説明する。
まず、図３に示すように、複数に分割された角鋼管２１を柱梁架構１の梁３、柱２及び床４の内側の面に接着剤により接着する。この際、隣接する角鋼管２１の隙間の幅を適宜調整することにより、柱梁架構１の寸法が設計上の寸法と誤差がある場合であっても、この誤差を吸収することができる。また、角鋼管２１は、複数に分割されており、中空な構成であるため、重量が軽く、大掛かりな重機を用いずに施工を行うことができる。なお、角鋼管２１を配置する際に、角鋼管２１の内部に、次の工程で用いられる接合鉄筋２３を予め入れておく。
Hereinafter, a method for constructing such a reinforcing structure 10 will be described with reference to FIGS.
First, as shown in FIG. 3, the square steel pipe 21 divided into a plurality is bonded to the inner surfaces of the beam 3, the column 2 and the floor 4 of the column beam frame 1 with an adhesive. At this time, by appropriately adjusting the width of the gap between the adjacent square steel pipes 21, this error can be absorbed even when the dimensions of the column beam frame 1 are different from the design dimensions. Moreover, since the square steel pipe 21 is divided | segmented into plurality and is a hollow structure, it is light in weight and can be constructed without using a large heavy machine. In addition, when arrange | positioning the square steel pipe 21, the joining reinforcement 23 used by the next process is put in the inside of the square steel pipe 21 beforehand.
次に、図４に示すように、隣接する角鋼管２１の間に亘って、接合鉄筋２３を角鋼管２１の内部に配筋する。図８は、接合鉄筋２３を配筋する様子を示す斜視図である。同図に示すように、予め、角鋼管２１を柱梁架構１に接着する際に角鋼管２１の内部に入れておいた複数の接合鉄筋２３を、角鋼管２１に設けられた開口２１１Ａより作業員が手を挿入して、隣接する角鋼管２１へ向けて移動させることにより配筋する。なお、これら複数の接合鉄筋２３の間には適宜スペーサなどを取り付けておくことで、これら接合鉄筋２３を所定の間隔に保持することができる。接合鉄筋２３を配筋した後、この開口２１１Ａは閉塞する。なお、本実施形態では、上方の両コーナー部における接合鉄筋２３Ａとして、Ｌ字型のものを用いており、上記のような方法では配筋することができない。このため、上方の両コーナー部の接合鉄筋２３Ａは、梁３側の角鋼管２１を柱梁架構１に接着する際に、梁３に接着した角鋼管２１内の所定の位置にＬ字型の接合鉄筋２３Ａを配置した後、柱側の角鋼管２１を内部に接合鉄筋２３Ａの端部が挿入されるように配置することにより配筋する。そして、柱梁架構１の下方の両コーナー部に接着された角鋼管２１Ａの開口２１０Ａより突出するように、ブレース部材３０の下方にあたる位置に埋設される応力伝達筋４０を配筋する。 Next, as shown in FIG. 4, the joining rebar 23 is arranged inside the square steel pipe 21 across the adjacent square steel pipes 21. FIG. 8 is a perspective view showing a state in which the joining reinforcing bars 23 are arranged. As shown in the figure, a plurality of joint rebars 23 previously placed in the square steel pipe 21 when the square steel pipe 21 is bonded to the column beam frame 1 are operated from the opening 211A provided in the square steel pipe 21. A member inserts a hand and arranges it by moving it toward the adjacent square steel pipe 21. In addition, by attaching a spacer or the like between the plurality of joining reinforcing bars 23, the joining reinforcing bars 23 can be held at a predetermined interval. After the joint reinforcing bar 23 is arranged, the opening 211A is closed. In this embodiment, an L-shaped joint reinforcing bar 23A at both upper corners is used, and cannot be arranged by the above method. For this reason, the joining rebars 23A at both upper corners are L-shaped at predetermined positions in the square steel pipe 21 bonded to the beam 3 when the square steel pipe 21 on the beam 3 side is bonded to the column beam frame 1. After the joining rebar 23A is arranged, the column-side square steel pipe 21 is arranged by placing it so that the end of the joining rebar 23A is inserted therein. Then, the stress transmission bar 40 embedded in a position corresponding to the lower side of the brace member 30 is arranged so as to protrude from the opening 210A of the square steel pipe 21A bonded to both corners below the column beam frame 1.
次に、図５に示すように、下側の両コーナー部の角鋼管２１の開口２１０Ａより突出している応力伝達筋４０が内部に挿入されるように、ブレース部材３０を構成する鋼管３１を配置する。この際、上記の周辺枠２０の場合と同様に、柱梁架構１に寸法誤差がある場合であっても、周辺枠２０の角鋼管２１と、ブレース部材３０の鋼管３１との間の隙間を調整することにより、この寸法誤差を吸収することができる。 Next, as shown in FIG. 5, the steel pipe 31 constituting the brace member 30 is arranged so that the stress transmission bars 40 protruding from the openings 210 </ b> A of the square steel pipes 21 at both lower corners are inserted. To do. At this time, as in the case of the peripheral frame 20, the gap between the square steel pipe 21 of the peripheral frame 20 and the steel pipe 31 of the brace member 30 is maintained even when the column beam frame 1 has a dimensional error. This dimensional error can be absorbed by adjusting.
そして、ブレース部材３０の上方にあたる位置に埋設される応力伝達筋４０を両端が夫々周辺枠２０を構成する角鋼管２１Ｂ及びブレース部材３０を構成する鋼管３１との接続部を通るように配筋する。なお、この配筋作業は、図８を参照して説明したのと同様に、鋼管３１に開口を設けるとともに鋼管３１の内部に応力伝達筋４０を入れておき、鋼管３１を配置した後、開口より応力伝達筋４０を移動させることで配筋できる。 And the stress transmission bar | burr 40 embed | buried in the position which hits the upper direction of the brace member 30 is arranged so that both ends may pass through the connection part with the square steel pipe 21B which comprises the peripheral frame 20, and the steel pipe 31 which comprises the brace member 30 respectively. . In addition, this bar arrangement work is the same as described with reference to FIG. 8. After opening the steel pipe 31 and placing the stress transmission bar 40 inside the steel pipe 31 and arranging the steel pipe 31, the opening is performed. It can be arranged by moving the stress transmission muscle 40 more.
次に、図６に示すように、周辺枠２０を構成する角鋼管２１の間の隙間及び、周辺枠２０を構成する角鋼管２１Ａ，２１Ｂと、ブレース部材３０を構成する鋼管３１の間の隙間を覆うように、型枠５０を設置する。なお、隙間以外の部分は角鋼管２１を型枠として用いることができるため、型枠設置の手間を削減できる。 Next, as shown in FIG. 6, the gap between the square steel pipes 21 constituting the peripheral frame 20 and the gap between the square steel pipes 21 </ b> A and 21 </ b> B constituting the peripheral frame 20 and the steel pipe 31 constituting the brace member 30. The mold 50 is installed so as to cover. In addition, since the square steel pipe 21 can be used as a mold for portions other than the gap, the labor for installing the mold can be reduced.
次に、図７に示すように、周辺枠２０及びブレース部材３０を構成する角鋼管２１、３１内にモルタルグラウト２２、３２を充填する。充填したモルタルグラウト２２、３２が硬化した後、型枠５０を撤去することにより、補強構造１０の構築が完了する。 Next, as shown in FIG. 7, mortar grouts 22 and 32 are filled into the square steel pipes 21 and 31 constituting the peripheral frame 20 and the brace member 30. After the filled mortar grouts 22 and 32 are cured, the mold 50 is removed to complete the construction of the reinforcing structure 10.
以上説明したように、本実施形態によれば、周辺枠２０を構成する複数の角鋼管２１の隙間の幅を適宜調整することにより施工誤差を吸収することができる。また、これと同様に、ブレース部材３０を構成する鋼管３１と周辺枠２０を構成する角鋼管２１との間の隙間を適宜調整することにより柱梁架構１の寸法誤差を吸収することができる。 As described above, according to the present embodiment, construction errors can be absorbed by appropriately adjusting the widths of the gaps between the plurality of square steel pipes 21 constituting the peripheral frame 20. Similarly, the dimensional error of the column beam frame 1 can be absorbed by appropriately adjusting the gap between the steel pipe 31 constituting the brace member 30 and the square steel pipe 21 constituting the peripheral frame 20.
また、周辺枠２０及びブレース部材３０を、角鋼管２１、３１と、モルタルグラウト２２，３２と、接合鉄筋２３とが一体となって外力に抵抗する構成としているので、角鋼管２１、３１の断面を小さくすることができ、軽量化を図れる。さらに、角鋼管２１，３１を複数に分割する構成としたため、部材重量が軽量でとなり、大掛かりな重機がなくても施工することができる。 In addition, since the peripheral frame 20 and the brace member 30 are configured such that the square steel pipes 21 and 31, the mortar grouts 22 and 32, and the joining rebar 23 are integrated to resist external force, the cross section of the square steel pipes 21 and 31. Can be reduced, and the weight can be reduced. Further, since the square steel pipes 21 and 31 are divided into a plurality of parts, the weight of the member is light, and construction can be performed without a large heavy machine.
なお、上記の実施形態では、周辺枠２０を構成する枠材として角鋼管２１を用いているが、これに限らず、溝形鋼（チャンネル鋼）を用いる構成とすることも可能である。図９は、枠材として溝形鋼１２１を用いた場合の実施形態を示す図であり、（Ａ）は鉛直断面図であり、（Ｂ）は、（Ａ）におけるI−I´断面図であり、（Ｃ）は（Ａ）におけるII−II´断面図である。なお、上記実施形態と同じ構成の部位については、同じ符号を付して説明を省略する。同図に示すように、本実施形態では、周辺枠２０を構成する枠材として角鋼管２１に替えて溝形鋼１２１を用いている。溝形鋼１２１を用いる場合には、モルタルグラウト２２と溝形鋼１２１との付着を確保するため、溝形鋼１２１の内面にスタッド１２４を取付けておく。かかる構成によっても、上記の実施形態と同様の効果が得られる。 In the above embodiment, the square steel pipe 21 is used as a frame material constituting the peripheral frame 20, but the present invention is not limited to this, and a configuration using grooved steel (channel steel) is also possible. FIGS. 9A and 9B are diagrams showing an embodiment in which the grooved steel 121 is used as a frame member, where FIG. 9A is a vertical cross-sectional view, and FIG. 9B is a cross-sectional view taken along line II ′ in FIG. And (C) is a sectional view taken along line II-II ′ in (A). In addition, about the site | part of the same structure as the said embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted. As shown in the figure, in this embodiment, a grooved steel 121 is used in place of the square steel pipe 21 as a frame material constituting the peripheral frame 20. When the grooved steel 121 is used, a stud 124 is attached to the inner surface of the grooved steel 121 in order to ensure adhesion between the mortar grout 22 and the grooved steel 121. Even with this configuration, the same effect as the above-described embodiment can be obtained.
また、上記の各実施形態では、周辺枠を構成する枠材及びブレース部材を構成する管状部材として鋼製の部材を用いているが、これに限らず、ＦＲＰ（繊維補強プラスチック）やアルミ製の部材を用いることもできる。 In each of the above embodiments, the steel member is used as the frame member constituting the peripheral frame and the tubular member constituting the brace member. However, the present invention is not limited to this, and FRP (fiber reinforced plastic) or aluminum is used. A member can also be used.
また、上記の各実施形態では、ブレース部材３０を構成する鋼管３１としてブレース部材３０全長に亘るものを用いたがこれに限らず、複数に分割された鋼管を用い、隣接する分割された鋼管の間に亘って接合鉄筋をモルタルグラウト内に埋設する構成としてもよい。 Moreover, in each said embodiment, although the thing covering the brace member 30 full length was used as the steel pipe 31 which comprises the brace member 30, it is not restricted to this, The steel pipe divided | segmented into plurality is used, and the adjacent divided steel pipe is used. It is good also as a structure which embeds a joining rebar in mortar grout over it.
また、上記の各実施形態では、周辺枠２０にブレース部材３０をＶ字状に設ける場合について説明したが、これに限らず、例えば図１０（Ａ）に示すように、ブレース部材３０を周辺枠２０の対角線上に交差するように設ける構成としてもよいし、また、柱梁架構内に開口を設ける場合には、図１０（Ｂ）に示すように、ブレース部材３０を複数の鋼管３１から構成し、前記開口を避けるようにこれら複数の鋼管３１を接続するような構成としてもよく、要するに、周辺枠２０の上下を結ぶようにブレース部材を設ける場合は本発明に含まれる。 Further, in each of the above embodiments, the case where the brace member 30 is provided in the peripheral frame 20 in a V shape has been described. However, the present invention is not limited to this, and for example, as shown in FIG. It is good also as a structure provided so that it may cross | intersect on 20 diagonals, and when providing an opening in a column beam frame, as shown to FIG. 10 (B), the brace member 30 is comprised from several steel pipes 31. However, the plurality of steel pipes 31 may be connected so as to avoid the opening. In short, the case where the brace member is provided so as to connect the upper and lower sides of the peripheral frame 20 is included in the present invention.
また、上記の各実施形態では、周辺枠２０を構成する鋼管２１を柱２、梁３及び床４に接着剤２５により接着することとしたが、これに限らず、開口５の上下にあたる箇所の鋼管２１のみを梁３及び床４に接着剤２５により接着し、開口５の両側部にあたる箇所の鋼管２１は柱２に接着せずに、周辺枠２０と柱２との間にはスリットを設ける構成としてもよい。 Further, in each of the above embodiments, the steel pipe 21 constituting the peripheral frame 20 is bonded to the column 2, the beam 3, and the floor 4 with the adhesive 25. Only the steel pipe 21 is bonded to the beam 3 and the floor 4 with an adhesive 25, and the steel pipe 21 at both sides of the opening 5 is not bonded to the column 2, and a slit is provided between the peripheral frame 20 and the column 2. It is good also as a structure.
また、上記の各実施形態では、柱梁架構１の床４、梁３、及び柱２で囲まれた開口５内に補強構造１０を設ける構成について説明したが、これに限らず、床、梁、及び対向する耐力壁で囲まれた開口内に本発明の補強構造を設けることも可能であり、要するに既存建物のせん断変形が生じる矩形状の開口であれば本発明の補強構造を設けることができる。 Further, in each of the embodiments described above, the configuration in which the reinforcing structure 10 is provided in the opening 5 surrounded by the floor 4, the beam 3, and the column 2 of the column beam structure 1 is not limited thereto. It is also possible to provide the reinforcing structure of the present invention in the opening surrounded by the bearing walls facing each other. In short, the reinforcing structure of the present invention can be provided if it is a rectangular opening in which shear deformation of an existing building occurs. it can.
また、上記の各実施形態では、周辺枠２０を構成する枠材として複数に分割された鋼管２１や溝形鋼１２１を用いたが、これに限らず、図１１に示すように、周辺枠２０を開口５の上下に当たる部分のみに設けるものとし、周辺枠２０を構成する枠材として一体に形成された（すなわち、複数に分割されていない）鋼管や溝形鋼を用い、さらに、ブレース部材３０を構成する枠材として複数に分割された鋼管２２１を用いて構築もよい。かかる構成の補強構造１１０によっても、ブレース部材３０を構成する鋼管３１と周辺枠３０を構成する鋼管１３１との間の隙間、及びブレース部材３０を構成する鋼管１３１の隙間を調整することにより、誤差を吸収することができる。さらに、ブレース部材３０を構成する枠材として一体の鋼管を用いた場合であっても、ブレース部材３０を構成する鋼管と周辺枠を構成する鋼管との間を調整することにより、誤差を吸収することができる。 Moreover, in each said embodiment, although the steel pipe 21 and the grooved steel 121 divided | segmented into plurality were used as the frame material which comprises the peripheral frame 20, it is not restricted to this, As shown in FIG. Is provided only in the portion corresponding to the upper and lower sides of the opening 5, and a steel pipe or channel steel formed integrally (that is, not divided into a plurality of parts) is used as a frame material constituting the peripheral frame 20, and the brace member 30 is further provided. It may be constructed using a steel pipe 221 divided into a plurality of frames as a frame material constituting the. Even with the reinforcing structure 110 having such a configuration, the error between the steel pipe 31 constituting the brace member 30 and the steel pipe 131 constituting the peripheral frame 30 and the gap between the steel pipe 131 constituting the brace member 30 can be adjusted by adjusting the gap. Can be absorbed. Further, even when an integral steel pipe is used as a frame material constituting the brace member 30, an error is absorbed by adjusting a gap between the steel pipe constituting the brace member 30 and the steel pipe constituting the peripheral frame. be able to.
また、上記の各実施形態では、周辺枠２０を構成する鋼管２１と、ブレース部材３０を構成する鋼管３１とに亘ってセメント系材料に応力伝達筋を埋設することにより、周辺枠２０とブレース部材３０とを接合するものとしたが、これに限らず、図１２に示すように、周辺枠２０及びブレース部材３０を構成する枠材とが一体となった鋼管３２１Ａ，３２１Ｂを用い、鋼管３２１Ａ、３２１Ｂの間の隙間及び周辺枠２０を構成する鋼管２１の間の隙間を調整することにより、誤差を吸収してもよい。このように、周辺枠２０及びブレース部材３０を構成する鋼管２１、３１が一体に形成されておらず、任意の位置で複数に分割されていれば、誤差を吸収することが可能となる。 Further, in each of the above embodiments, the peripheral frame 20 and the brace member are embedded by embedding a stress transmission line in the cementitious material across the steel pipe 21 constituting the peripheral frame 20 and the steel pipe 31 constituting the brace member 30. However, the present invention is not limited to this, and as shown in FIG. 12, the steel pipe 321 </ b> A, 321 </ b> A using the steel pipes 321 </ b> A and 321 </ b> B in which the peripheral frame 20 and the frame material constituting the brace member 30 are integrated. The error may be absorbed by adjusting the gap between 321B and the gap between the steel pipes 21 constituting the peripheral frame 20. Thus, if the steel pipes 21 and 31 constituting the peripheral frame 20 and the brace member 30 are not integrally formed and are divided into a plurality of parts at an arbitrary position, it is possible to absorb errors.
また、上記の各実施形態では、周辺枠２０を柱梁架構１に沿って枠状に構築するものとしたが、これに限らず、図１３に示すように、少なくとも梁３及び床４に沿ってブレース部材３０の接続される部分が構築されていればよい。このような構成は柱梁架構１内に扉などの開口部を設ける場合に好適である。 Further, in each of the above embodiments, the peripheral frame 20 is constructed in a frame shape along the column beam frame 1. However, the present invention is not limited to this, and as shown in FIG. 13, at least along the beam 3 and the floor 4. The part to which the brace member 30 is connected needs to be constructed. Such a configuration is suitable when an opening such as a door is provided in the column beam frame 1.
また、上記の各実施形態では、隣接する鋼管２１又は溝形鋼１２１の間に亘ってモルタルグラウト２２内に接合鉄筋２３を埋設することにより鋼管２１の間で応力伝達可能としており、また、周辺枠２０の鋼管２１とブレース部材３０の鋼管３１とに亘ってモルタルグラウト２２、３２内に応力伝達筋４０を埋設することにより周辺枠２０とブレース部材３０との間で応力伝達可能としている。しかし、これに限らず、例えば、図１４に示すように、隣接する鋼管２１に亘って鋼板やＦＲＰ製の板材などの応力伝達可能な板材２２３を取り付け、この板材２２３により隣接する鋼管２１の間で応力伝達可能とし、また、これと同様に、周辺枠２０の鋼管２１とブレース部材３０の鋼管３１とに亘って、応力伝達可能な板材２４０を取り付け、この板材２４０により周辺枠２０とブレース部材３０との間で応力伝達可能としてもよい。 In each of the above embodiments, stress can be transmitted between the steel pipes 21 by embedding the joining rebar 23 in the mortar grout 22 between the adjacent steel pipes 21 or the grooved steel 121, and Stress transmission lines 40 are embedded in the mortar grouts 22 and 32 across the steel pipe 21 of the frame 20 and the steel pipe 31 of the brace member 30 so that stress can be transmitted between the peripheral frame 20 and the brace member 30. However, the present invention is not limited to this. For example, as shown in FIG. 14, a plate member 223 capable of transmitting stress such as a steel plate or a plate made of FRP is attached across the adjacent steel pipes 21, and the adjacent steel pipes 21 are attached by the plate member 223. In the same manner, a plate material 240 capable of transmitting stress is attached across the steel pipe 21 of the peripheral frame 20 and the steel pipe 31 of the brace member 30, and the peripheral frame 20 and the brace member are attached by this plate material 240. It may be possible to transmit stress to 30.
１ 柱梁架構 ２ 柱
３ 梁 ４ 床
１０ 補強構造 ２０ 周辺枠
２１、２１Ａ、２１Ｂ 鋼管 ２２ モルタルグラウト
２３ 接合鉄筋 ２４ スタッド
２５ 接着剤 ３０ ブレース部材
３１ 鋼管 ３２ モルタルグラウト
４０ 応力伝達筋 ５０ 型枠
１２１ 溝形鋼 １２４ スタッド
２２３、２４０ 板材
DESCRIPTION OF SYMBOLS 1 Column beam frame 2 Column 3 Beam 4 Floor 10 Reinforcement structure 20 Peripheral frame 21, 21A, 21B Steel pipe 22 Mortar grout 23 Joint reinforcement 24 Stud 25 Adhesive 30 Brace member 31 Steel pipe 32 Mortar grout 40 Stress transmission line 50 Form 121 121 Groove Shaped steel 124 Stud 223, 240 Plate material
Claims (8)
前記枠材は前記開口の内周面のうち少なくとも上下の面に接着剤により接着されており、
前記枠材は二つ以上に分割されており、前記分割された枠材の間で応力伝達可能な応力伝達部材が設けられていることを特徴とする既存建物の補強構造。 Provided to connect the peripheral part attached to at least the upper and lower surfaces of the inner peripheral surface of the opening surrounding the rectangular opening of the existing building and the peripheral part attached to the upper and lower sides of the opening. A bracing portion, and a reinforcing structure in which a frame material is disposed in a portion corresponding to the peripheral portion and the brace portion, and a cement-based material is placed so as to be integrated with the frame material,
The frame member is bonded to at least the upper and lower surfaces of the inner peripheral surface of the opening with an adhesive,
The frame structure is divided into two or more, and a stress transmission member capable of transmitting stress between the divided frame members is provided.
前記枠材は前記開口の上下の面に接着剤により接着されており、
前記枠材は少なくとも二つ以上に分割されており、前記分割された枠材の間で応力伝達可能な応力伝達部材が設けられていることを特徴とする既存建物の補強構造。 Attached to the upper and lower surfaces of the inner peripheral surface of the opening of the frame surrounding the rectangular opening of the existing building, and attached so as to form a slit between the both side surfaces along both side surfaces of the opening A frame member disposed between a peripheral part and a brace member provided so as to connect the peripheral part attached to the top and bottom of the opening. A reinforcement structure of the existing building, which is formed by placing a cement-based material so as to be integrated with
The frame material is bonded to the upper and lower surfaces of the opening with an adhesive,
The frame structure is divided into at least two, and a stress transmission member capable of transmitting stress between the divided frame members is provided.
前記周辺部及び前記ブレース部にあたる部分に二つ以上に分割された枠材を配置するとともに、前記枠材を前記開口の内周面のうち少なくとも上下の面に接着剤により接着し、
前記分割された枠材の間に応力伝達可能な応力伝達部材を設け、
前記枠材と一体となるようにセメント系材料を打設することを特徴とする既存建物の補強構造。 Provided to connect the peripheral part attached to at least the upper and lower surfaces of the inner peripheral surface of the opening surrounding the rectangular opening of the existing building and the peripheral part attached to the upper and lower sides of the opening. A method of reinforcing an existing building by providing a reinforcing structure constituted by a brace part,
While arranging the frame material divided into two or more in the portion corresponding to the peripheral portion and the brace portion, the frame material is adhered to at least the upper and lower surfaces of the inner peripheral surface of the opening by an adhesive,
Providing a stress transmission member capable of transmitting stress between the divided frame members;
A reinforcing structure for an existing building, wherein a cement-based material is placed so as to be integrated with the frame material.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113089830A (en) * | 2021-04-17 | 2021-07-09 | 江苏苏邑设计集团有限公司 | Assembled bearing diagonal node steel frame construction |
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| CN113089830A (en) * | 2021-04-17 | 2021-07-09 | 江苏苏邑设计集团有限公司 | Assembled bearing diagonal node steel frame construction |
| CN113089830B (en) * | 2021-04-17 | 2021-11-30 | 苏邑设计集团有限公司 | Assembled bearing diagonal node steel frame construction |
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