JP2007291665A - Seismically retrofitting structure and seismically retrofitting method - Google Patents

Seismically retrofitting structure and seismically retrofitting method Download PDF

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JP2007291665A
JP2007291665A JP2006118948A JP2006118948A JP2007291665A JP 2007291665 A JP2007291665 A JP 2007291665A JP 2006118948 A JP2006118948 A JP 2006118948A JP 2006118948 A JP2006118948 A JP 2006118948A JP 2007291665 A JP2007291665 A JP 2007291665A
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fiber sheet
earthquake
wall
resistant wall
seismic
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Shigeo Watanabe
茂雄 渡邊
Yasushi Akiyama
靖司 穐山
Arinori Futamura
有則 二村
Haruyuki Araki
玄之 荒木
Toshiaki Kudo
利昭 工藤
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Kajima Corp
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Kajima Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a seismically retrofitting structure which is for use in seismically retrofitting an existing reinforced concrete structure or a steel framed reinforced concrete structure mainly suffering from lack of earthquake resistance, by using a fiber sheet, wherein the overall surface of the fiber sheet making intimate contact with an earthquake resistant wall is held in a manner being combined with the earthquake resistant wall in one body, to thereby prevent the overall surface of the fiber sheet from separating from the same, and to provide a seismically retrofitting method. <P>SOLUTION: According to the seismically retrofitting structure, the fiber sheet 2 is stuck at least to one surface of the earthquake resistant wall 1, and a reinforcing member 3 is bonded to a surface of the fiber sheet 2, followed by inserting binding members 4 into the earthquake resistant wall 1 to be fixed to the surface of the reinforcing member 3 via respective fixing devices 5. In this manner the earthquake resistant wall 1 is bound in an out-of-plane direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は主として耐震性の不足している既存の鉄筋コンクリート造、または鉄骨鉄筋コンクリート造構造物の耐震壁に対して実施される耐震補強構造、及び耐震補強方法に関するものである。   The present invention relates to a seismic reinforcement structure and a seismic reinforcement method implemented mainly for a seismic wall of an existing reinforced concrete structure or a steel reinforced concrete structure having a lack of seismic resistance.

耐震性の不足する既存の鉄筋コンクリート造や鉄骨鉄筋コンクリート造構造物の耐震性を向上させる方法には、柱や梁の回り、または耐震壁の両側に鋼板（鉄板）や連続繊維シートを巻き付ける方法（特許文献１〜５参照）、耐震壁を増設する方法（特許文献６参照）、ブレースを増設する方法（特許文献７参照）、耐震壁の壁厚を増加させる方法等がある（特許文献８参照）。いずれの方法においても構造物自体の強度を上昇させることが目的となっている。   To improve the earthquake resistance of existing reinforced concrete structures and steel reinforced concrete structures that lack earthquake resistance, a method of winding steel plates (continuous fiber sheets) or continuous fiber sheets around columns and beams, or on both sides of earthquake-resistant walls (patented) References 1 to 5), a method of adding a seismic wall (see Patent Document 6), a method of adding a brace (see Patent Document 7), a method of increasing the wall thickness of the earthquake resistant wall, etc. (see Patent Document 8). . In either method, the purpose is to increase the strength of the structure itself.

これらの耐震補強方法の内、耐震壁やブレースを増設する方法は既存の柱・梁のフレームが形成する開口部を閉塞することになるため、構造物内における使い勝手を悪くする問題がある。既存の耐震壁に鋼板を貼り付ける方法、壁厚を増す方法は構造物の質量を増加させる結果、基礎の負担が増すため、基礎に対する補強が不可欠になる。   Among these seismic reinforcement methods, the method of adding seismic walls and braces obstructs the opening formed by the existing pillar / beam frame, and thus has the problem of deteriorating usability in the structure. The method of pasting a steel plate on an existing seismic wall and the method of increasing the wall thickness increase the mass of the structure, resulting in an increase in the burden on the foundation, so that reinforcement of the foundation becomes indispensable.

このことから、開口部を閉塞させず、構造物質量の増加を招くことなく耐震壁を耐震補強するには、連続繊維シートを用いる方法が有効である。   Therefore, a method using a continuous fiber sheet is effective for seismic reinforcement of the earthquake-resistant wall without blocking the opening and causing an increase in the amount of structural materials.

しかしながら、連続繊維シートは引張力に対してのみ抵抗でき、圧縮力を負担することができないため、地震による引張力と圧縮力の繰り返しによって耐震壁や柱等の躯体から剥離する可能性が高く、躯体と一体となった形で地震力に抵抗することが難しい。   However, since the continuous fiber sheet can only resist the tensile force and cannot bear the compressive force, there is a high possibility that the continuous fiber sheet will be peeled off from the frame such as the earthquake-resistant wall or the column by repeating the tensile force and compressive force due to the earthquake, It is difficult to resist seismic forces in the form of a unit with the frame.

連続繊維シートと躯体との一体性を補うために、躯体の表面に貼り付けられた連続繊維シートの周辺部分に鋼材を配置し、鋼材を貫通するボルトを躯体に打ち込むことにより連続繊維シートを躯体に一体化させる方法がある（特許文献１、２参照）。   In order to supplement the unity between the continuous fiber sheet and the housing, the steel material is arranged around the continuous fiber sheet attached to the surface of the housing, and the continuous fiber sheet is driven by driving bolts penetrating the steel into the housing. (See Patent Documents 1 and 2).

特開平１０−２５９０４号公報（請求項１〜４、図１〜図３）Japanese Patent Laid-Open No. 10-25904 (Claims 1 to 4 and FIGS. 1 to 3) 特開平１１−６２２６９号公報（請求項１、２、４、図１〜図８）JP-A-11-62269 (Claims 1, 2, 4, FIGS. 1 to 8) 特開２０００−２７４４６号公報（請求項１、図１、図４）JP 2000-27446 A (Claim 1, FIG. 1, FIG. 4) 特開平１１−１５２９０７号公報（請求項１、図１、図６）Japanese Patent Laid-Open No. 11-152907 (Claim 1, FIG. 1, FIG. 6) 特開２００５−１２０６２９号公報（請求項１、２、図１、図２）Japanese Patent Laying-Open No. 2005-120629 (Claims 1, 2, FIG. 1, FIG. 2) 特開平９−２３５８８５号公報（請求項１、図１〜図３）Japanese Patent Laid-Open No. 9-235858 (Claim 1, FIGS. 1 to 3) 特開平１１−５０６９１号公報（請求項１、図１）JP-A-11-50691 (Claim 1, FIG. 1) 特開２００１−２７０４８号公報（請求項１、図１〜図４）JP 2001-27048 A (Claim 1, FIGS. 1 to 4)

特許文献１、２のように繊維シートを鋼材で挟み込み、繊維シートを拘束する方法によれば、躯体と繊維シートとの一体性をある程度確保することができると考えられる。特に特許文献２の図３、図４では鋼材を耐震壁の周囲以外の部分にも格子状に配置しているため、繊維シートと躯体との一体化の効果が高い利点がある。   According to the method in which the fiber sheet is sandwiched between steel materials and the fiber sheet is restrained as in Patent Documents 1 and 2, it is considered that the integrity of the housing and the fiber sheet can be secured to some extent. In particular, in FIGS. 3 and 4 of Patent Document 2, since the steel material is also arranged in a lattice pattern in portions other than the periphery of the earthquake-resistant wall, there is an advantage that the effect of integrating the fiber sheet and the casing is high.

しかしながら、繊維シートを直接、鋼材で拘束する方法によれば、鋼材が重なる部分を拘束することができるものの、鋼材が重ならない部分まで拘束することはできないため、この鋼材が重ならない部分の躯体からの剥離を有効に防止することが難しい。   However, according to the method of restraining the fiber sheet directly with the steel material, the portion where the steel material overlaps can be restrained, but the portion where the steel material does not overlap cannot be restrained. It is difficult to effectively prevent peeling.

本発明は上記背景より、耐震壁に密着している繊維シート全面を耐震壁に一体化させた状態に保持し、繊維シート全面の剥離を防止し得る耐震補強構造及び耐震補強方法を提案するものである。   The present invention proposes a seismic reinforcement structure and a seismic reinforcement method capable of holding the entire surface of the fiber sheet in close contact with the earthquake resistant wall in an integrated state with the earthquake resistant wall and preventing the separation of the entire fiber sheet. It is.

請求項１に記載の発明の耐震補強構造は、耐震壁の少なくとも片面に繊維シートが貼り付けられ、その繊維シートの表面に補強材が付着させられると共に、拘束材が前記耐震壁中に挿入され、前記補強材の表面に定着装置を介して定着され、前記耐震壁が面外方向に拘束されていることを構成要件とする。耐震補強は主として既存の耐震壁に対して実施されるが、新設の耐震壁においても実施される。   In the seismic reinforcement structure according to the first aspect of the present invention, a fiber sheet is attached to at least one surface of the earthquake resistant wall, a reinforcing material is attached to the surface of the fiber sheet, and a restraining material is inserted into the earthquake resistant wall. The fixing member is fixed to the surface of the reinforcing member via a fixing device, and the seismic wall is restrained in the out-of-plane direction. Seismic reinforcement will be carried out mainly on existing seismic walls, but will also be implemented on new seismic walls.

補強材にはモルタルやコンクリート、樹脂の他、樹脂や繊維を混入したモルタル等の硬化性の材料が使用され、モルタルの場合、繊維シートには吹付けや塗布により付着させられる。コンクリートの場合には例えば繊維シートを埋設した、もしくは付着させたプレキャストコンクリートとして補強材が成型されることにより繊維シートに付着させられる。この場合、補強材であるプレキャストコンクリートに繊維シートが予め一体化するため、既存の耐震壁に対しては繊維シートを耐震壁に向けた状態で接合される。プレキャストコンクリートにはまた、拘束材を挿入するための挿通孔が形成される。   As the reinforcing material, a curable material such as mortar mixed with resin or fiber is used in addition to mortar, concrete, and resin. In the case of mortar, the fiber sheet is attached by spraying or coating. In the case of concrete, for example, a reinforcing material is molded as precast concrete in which a fiber sheet is embedded or attached, and is attached to the fiber sheet. In this case, since the fiber sheet is preliminarily integrated with the precast concrete as the reinforcing material, the fiber sheet is joined to the existing earthquake resistant wall with the fiber sheet facing the earthquake resistant wall. The precast concrete is also formed with an insertion hole for inserting a restraining material.

繊維シートの表面に補強材が付着させられることで、繊維シートは硬化する補強材によって固められるため、圧縮力によって繊維シートに皺が寄り、繊維シートが剥離することが回避される。この結果、繊維シートは全面において常に耐震壁に密着した状態を維持したまま、引張力を負担することが可能になる。   By attaching the reinforcing material to the surface of the fiber sheet, the fiber sheet is solidified by the hardening reinforcing material, so that it is avoided that the fiber sheet is wrinkled by the compressive force and the fiber sheet is peeled off. As a result, the fiber sheet can bear the tensile force while maintaining the state in which the fiber sheet is always in close contact with the earthquake-resistant wall.

圧縮力による繊維シートの剥離が回避されることで、繊維シートは地震により繰り返し加力を受けた場合にも耐震壁から剥離を起こすことがなくなるか、剥離の可能性が低下するため、破断するまで繊維シート自身の持つ高強度特性を発揮させることが可能になる。繊維シートはまた、吹付け、または塗布される補強材との付着効果により補強材を耐震壁に付着させた状態を持続させる働きをするため、補強材の剥離を防止する効果も発揮する。   By avoiding the peeling of the fiber sheet due to the compressive force, the fiber sheet will not peel off from the earthquake-resistant wall even when it is repeatedly subjected to an earthquake, or the possibility of peeling will decrease, so it will break. It is possible to exhibit the high strength characteristics of the fiber sheet itself. The fiber sheet also works to maintain the state in which the reinforcing material is attached to the earthquake-resistant wall by the effect of adhesion with the reinforcing material that is sprayed or applied, and thus exhibits the effect of preventing the peeling of the reinforcing material.

特に補強材として高性能繊維を混入した繊維補強モルタルを用いた場合には、繊維補強モルタル自体が２Ｎ／ｍｍ２程度の引張応力を持続的に負担でき、３０Ｎ／ｍｍ２程度の圧縮強度も有することから、繊維シートに負担させる引張応力の低減と、繊維シートが負担できない圧縮応力を繊維補強モルタルに負担させることが可能である。その結果、少ない繊維シートの使用で耐震壁を効果的に補強することが可能になる。モルタル等の補強材に引張応力の負担を期待しない場合には、高性能繊維を混入しない一般の吹付けモルタルを使用し、モルタルには圧縮応力のみを負担させればよい。 In particular, when a fiber reinforced mortar mixed with high-performance fibers is used as a reinforcing material, the fiber reinforced mortar itself can continuously bear a tensile stress of about 2 N / mm 2 and has a compressive strength of about 30 N / mm 2. For this reason, it is possible to reduce the tensile stress imposed on the fiber sheet and to cause the fiber reinforced mortar to bear a compressive stress that the fiber sheet cannot bear. As a result, it is possible to effectively reinforce the earthquake-resistant wall with the use of a small number of fiber sheets. When the burden of tensile stress is not expected on the reinforcing material such as mortar, a general spraying mortar that does not mix high-performance fibers may be used, and the mortar only needs to bear the compressive stress.

補強材の表面には全面の内、少なくとも部分的に定着装置が配置される。この定着装置と耐震壁をボルトやピン等の拘束材が貫通することにより、またはアンカー等の拘束材が耐震壁中に挿入されることにより定着装置の表面に拘束材が定着される。拘束材の定着により補強材が定着装置から耐震壁の厚さ方向（面外方向）に支圧力を受け、拘束されるため、繊維シートも補強材中で拘束される。繊維シートが耐震壁の片面にのみ貼り付けられる場合、拘束材は定着装置と補強材及び繊維シートを貫通し、耐震壁の厚さ方向の中途の深さまで挿入される場合と、耐震壁を貫通する場合がある。   A fixing device is disposed at least partially on the surface of the reinforcing material. A restraint material such as a bolt or a pin penetrates the fixing device and the earthquake resistant wall, or a restraint material such as an anchor is inserted into the earthquake resistant wall, thereby fixing the restraint material on the surface of the fixing device. Since the reinforcing material is supported and restrained by the fixing device in the thickness direction (out-of-plane direction) of the seismic wall from the fixing device, the fiber sheet is also restrained in the reinforcing material. When the fiber sheet is attached to only one side of the earthquake-resistant wall, the restraint material penetrates the fixing device, the reinforcing material and the fiber sheet, and is inserted to a depth halfway in the thickness direction of the earthquake-resistant wall. There is a case.

補強材の硬化後、拘束材には頭部の反対側へのナットの締結、または頭部へのナットの締結等により軸方向引張力が与えられ、その状態で拘束材が定着装置に定着される。拘束材への軸力の導入に伴って定着装置から補強材と繊維シート及び耐震壁にその厚さ方向の圧縮力が与えられる。   After the reinforcing material is cured, the restraining material is given an axial tensile force by fastening a nut to the opposite side of the head or by fastening a nut to the head, and the restraining material is fixed to the fixing device in that state. The Along with the introduction of the axial force to the restraining material, a compressive force in the thickness direction is applied from the fixing device to the reinforcing material, the fiber sheet and the earthquake resistant wall.

繊維シートへの補強材の付着作業と、拘束材の挿入作業の前後は問われず、補強材の付着後に拘束材を挿入する場合と逆の場合、または並行する場合がある。只、拘束材の挿入が先行する場合には、補強材の付着後に拘束材に軸力を与える上で、補強材の繊維シートへの付着に伴って拘束材へも補強材が付着しないよう、補強材の付着作業の際、拘束材はテープやシール等によって保護される。   Before and after the work of attaching the reinforcing material to the fiber sheet and the time of inserting the restraining material, there are cases where it is opposite or parallel to the case where the restraining material is inserted after the reinforcing material is attached.只 If the insertion of the restraint material precedes, in order to give axial force to the restraint material after adhesion of the reinforcement material, the reinforcement material does not adhere to the restraint material as the reinforcement material adheres to the fiber sheet. When attaching the reinforcing material, the restraining material is protected by a tape or a seal.

前記のように繊維シートは補強材に固められることで、引張力と圧縮力に対して安定するため、機能を発揮する上では必ずしも定着装置による拘束を受ける必要はないが、補強材が定着装置から耐震壁の厚さ方向に圧縮力を受けて拘束されることで、繊維シートの拘束効果が向上し、安定性が向上する利益が得られる。   As described above, since the fiber sheet is fixed to the reinforcing material and is stable with respect to the tensile force and the compressive force, it is not always necessary to be restrained by the fixing device in order to perform the function. Since it is restrained by receiving a compressive force in the thickness direction of the seismic wall, the restraining effect of the fiber sheet is improved, and the benefit of improving the stability can be obtained.

耐震壁は拘束材と定着装置によって厚さ方向（面外方向）に拘束され、面内方向には周囲の柱・梁のフレームから拘束されることで、３軸圧縮状態になり、厚さ方向の拘束（面外拘束）がない場合より高い圧縮力を負担できることになるため、既存の耐震壁の耐力が向上する。   The seismic wall is constrained in the thickness direction (out-of-plane direction) by the restraining material and the fixing device, and in the in-plane direction, it is constrained from the frame of the surrounding pillars and beams, and becomes a triaxial compression state, and the thickness direction Since the higher compressive force can be borne than when there is no restraint (out-of-plane restraint), the strength of the existing seismic wall is improved.

面外拘束のない耐震壁では、既設の柱・梁のフレームと耐震壁の境界面のコンクリートがせん断すべり破壊を起こし、コンクリートが剥落し易いため、せん断すべり破壊に起因して急激な耐力低下により破壊に至る可能性が高い。これに対し、請求項１では耐震壁の表面に面外から一様に拘束を与えることで、せん断すべり破壊を起こしにくくすることができるため、せん断すべり破壊によるコンクリートの剥落を防止することができる。併せて耐震壁を大きな変形性能を発揮する高靭性の耐震補強壁にすることが可能になる。   In the case of a seismic wall without out-of-plane restraint, the concrete at the boundary surface between the existing column / beam frame and the seismic wall causes shear slip failure, and the concrete easily peels off. There is a high possibility of destruction. On the other hand, in claim 1, since the surface of the earthquake-resistant wall is uniformly constrained from the out-of-plane direction, it is possible to make it difficult to cause shear slip failure, and therefore, it is possible to prevent the concrete from peeling off due to shear slip failure. . In addition, it is possible to make the earthquake-resistant wall a high-toughness earthquake-proof reinforcement wall that exhibits great deformation performance.

また耐震壁の、フレームとの境界面のコンクリートは面外拘束を受けることで、耐震壁自体が面内方向には破壊耐力の高い直接せん断型の応力状態になるため、耐震壁の耐力を上げるために既設の柱・梁のフレームと繊維シートを一体化させる必要がなくなる。それに伴い、両者を一体化させるための特殊なアンカーやあと施工アンカー等の固定金具等を使用する必要がなくなり、施工時の環境問題になり易い振動や騒音、粉塵の障害の発生が解消される。   In addition, the concrete at the boundary surface of the seismic wall with the frame is subjected to out-of-plane restraint, so that the seismic wall itself becomes a direct shear type stress state with high fracture strength in the in-plane direction, thus increasing the strength of the seismic wall. Therefore, it is not necessary to integrate the existing pillar / beam frame and the fiber sheet. As a result, it is no longer necessary to use special anchors to integrate the two or fixing brackets such as post-installation anchors, eliminating the occurrence of vibration, noise, and dust disturbances that tend to cause environmental problems during construction. .

更に耐震壁に対する引張補強材として高強度の繊維シートを使用することで、鉄筋コンクリート造の増打ち耐震壁工法のように多段に配筋した鉄筋の厚さ、鉄筋のかぶり厚を確保する必要がないため、増打ちする場合のように壁厚を大きくすることがない。このため、構造物の質量を増加させることがなく、基礎に対する補強の必要も生じない。   Furthermore, by using a high-strength fiber sheet as a tensile reinforcement for the seismic wall, it is not necessary to secure the thickness of the reinforcing bars and the cover thickness of the reinforcing bars as in the case of the reinforced concrete structure of the reinforced concrete structure. Therefore, the wall thickness is not increased as in the case of increasing the number of shots. For this reason, the mass of the structure is not increased, and there is no need to reinforce the foundation.

なお、補強材として吹付けモルタルを使用した場合には、補強材が繊維シートの貼り付けによる工法の弱点である火災時の火害劣化を防止する耐火保護材になるため、有害ガスの発生を防止する利点がある。仮に火災の発生があっても繊維シート自体の燃焼が防止されるため、繊維シートによる耐震壁の補強効果が低下せず、維持される利点もある。   In addition, when sprayed mortar is used as a reinforcing material, the reinforcing material becomes a fire-resistant protective material that prevents fire damage degradation in the event of a fire, which is a weak point of the construction method by attaching fiber sheets. There is an advantage to prevent. Even if a fire occurs, the fiber sheet itself is prevented from burning, so that the reinforcing effect of the earthquake resistant wall by the fiber sheet is not lowered and maintained.

また現場練りの吹付けモルタルを使用すれば、コンクリートを打設する場合の型枠が不要である上、コンクリートを打設するための時間的な制限、材料供給のための場所的な制限がないため、夜間工事や居ながら工事が可能となり、施工遂行上、省資源、省力化が図られる。   In addition, using spray mortar kneaded on-site eliminates the need for formwork when placing concrete, and there are no time restrictions for placing concrete and no place restrictions for material supply. Therefore, it is possible to work at night or while living, saving resources and saving labor in executing the work.

請求項１に記載の発明の耐震補強構造は、耐震壁の少なくとも片面に繊維シートを貼り付ける工程と、その繊維シートの表面に補強材を付着させる工程と、拘束材を前記耐震壁中に挿入する工程と、前記拘束材を前記補強材の表面に定着装置を介して定着させ、前記耐震壁を面外方向に拘束する工程とを含む請求項５に記載の耐震補強方法の実施により完成する。前記のように繊維シートの表面に補強材を付着させる工程と、拘束材を補強材の表面に定着装置を介して定着させる工程の前後は問われない。   The seismic reinforcement structure of the invention according to claim 1 includes a step of attaching a fiber sheet to at least one surface of the earthquake resistant wall, a step of attaching a reinforcing material to the surface of the fiber sheet, and inserting a restraining material into the earthquake resistant wall. And a step of fixing the constraining material to the surface of the reinforcing member via a fixing device and constraining the earthquake-resistant wall in an out-of-plane direction. . Before and after the step of attaching the reinforcing material to the surface of the fiber sheet and the step of fixing the restraining material to the surface of the reinforcing material via the fixing device as described above are not limited.

繊維シートは耐震壁の全面に貼り付けられる他、請求項２に記載のように耐震壁の隅角部間に交差して、または請求項３に記載のように耐震壁の周辺に沿って貼り付けられる。いずれの場合も、繊維シートは耐震壁に開口部があるか否かに関係なく、耐震壁の少なくとも補強すべき箇所に貼り付けられる。   The fiber sheet is affixed to the entire surface of the earthquake-resistant wall, or crosses between the corners of the earthquake-resistant wall as described in claim 2 or along the periphery of the earthquake-resistant wall as described in claim 3. Attached. In any case, the fiber sheet is affixed to at least a portion to be reinforced, regardless of whether the earthquake-resistant wall has an opening.

請求項２に記載の発明の耐震補強構造は、請求項６に記載のように請求項５において前記繊維シートを前記耐震壁の隅角部間に交差して貼り付けることにより完成する。請求項３に記載の発明の耐震補強構造は、請求項７に記載のように請求項５において前記繊維シートを前記耐震壁の周辺に沿って貼り付けることにより完成する。   A seismic reinforcement structure according to a second aspect of the invention is completed by attaching the fiber sheet between the corners of the seismic wall in the fifth aspect as in the sixth aspect. The seismic reinforcement structure of the invention described in claim 3 is completed by attaching the fiber sheet along the periphery of the earthquake resistant wall in claim 5 as described in claim 7.

耐震壁に開口部が形成される場合、または既存の耐震壁が開口部を有する場合において、開口部が柱に面する場合には、開口部の存在により耐震壁に接続しない柱の区間、すなわち開口部に面する区間のせん断力の負担割合が大きくなる。耐震壁が接続する区間においては柱が負担すべき水平せん断力の一部が耐震壁に流れることで、柱の負担が軽減されるのに対し、耐震壁が接続しない区間からはせん断力が耐震壁に流れないためである。   If an opening is formed in the seismic wall, or if the existing seismic wall has an opening and the opening faces the column, the section of the column that is not connected to the seismic wall due to the presence of the opening, i.e. The share of shear force in the section facing the opening is increased. In the section where the seismic wall is connected, a part of the horizontal shearing force that the column should bear flows to the seismic wall, reducing the burden on the column, while the shearing force is seismic from the section where the seismic wall is not connected. This is because it does not flow into the wall.

そこで、開口部に面する柱がせん断力を負担することによるせん断破壊を防止するために、請求項４に記載のように繊維シートが耐震壁の全面に貼り付けられ、耐震壁に形成された開口部に面する柱の回りに繊維シートが巻き付けられる。   Then, in order to prevent the shear fracture | rupture by the column which faces an opening part bearing a shearing force, the fiber sheet was affixed on the whole surface of the earthquake-resistant wall as described in Claim 4, and was formed in the earthquake-resistant wall. A fiber sheet is wound around a column facing the opening.

繊維シートの付着により引張強度の増した耐震壁が高い耐力を保有することで、過大な水平力に対しても健全に保たれることが可能になるが、柱がその水平力によってせん断破壊することになれば、繊維シートで耐震壁を補強することの意義が薄れる可能性がある。これに対し、請求項４では開口部に面する柱の耐力も耐震壁と共に高められることで、耐震壁が耐力を発揮する限りにおいて柱も耐力を発揮することが可能になり、耐震壁とその回りのフレームの耐震性が向上する。   The seismic wall with increased tensile strength due to the adhesion of the fiber sheet has high proof stress, so it can be kept healthy against excessive horizontal force, but the column will be sheared and destroyed by the horizontal force. If this happens, the significance of reinforcing the seismic wall with a fiber sheet may be diminished. On the other hand, in claim 4, the proof stress of the column facing the opening is enhanced together with the seismic wall, so that as long as the seismic wall exhibits the proof strength, the pillar can also exhibit the proof strength. The earthquake resistance of the surrounding frame is improved.

請求項４に記載の発明の耐震補強構造は、請求項８に記載のように請求項５において前記繊維シートを前記耐震壁の全面に貼り付け、前記耐震壁に形成された開口部に面する柱の回りに繊維シートを巻き付けることにより完成する。   According to a fourth aspect of the present invention, there is provided the seismic reinforcing structure according to the fifth aspect, wherein the fiber sheet is attached to the entire surface of the seismic wall in the fifth aspect and faces an opening formed in the seismic wall. It is completed by wrapping a fiber sheet around the pillar.

耐震壁に貼り付けられる繊維シートの表面に補強材を付着させ、繊維シートを硬化する補強材によって固めるため、繊維シートの全面が圧縮力によって剥離することを回避することができ、繊維シートの全面を常に耐震壁に密着させたままに保つことができる。   Since the reinforcing material is attached to the surface of the fiber sheet to be attached to the earthquake-resistant wall and hardened by the reinforcing material that hardens the fiber sheet, the entire surface of the fiber sheet can be avoided from being peeled off by the compressive force. Can always be kept in close contact with the earthquake-resistant wall.

この結果、繊維シートは地震により繰り返し加力を受け、既存躯体のコンクリートにひび割れが発生した場合にも耐震壁から剥離しにくくなるため、破断するまで繊維シート自身の持つ高強度特性を発揮することができる。   As a result, the fiber sheet is repeatedly subjected to the force of an earthquake, and even if cracks occur in the concrete of the existing frame, it is difficult to peel off from the earthquake resistant wall, so the fiber sheet itself exhibits the high strength characteristics until it breaks Can do.

耐震壁は拘束材と定着装置によって面外方向に拘束され、周囲のフレームから面内方向に拘束されることと併せて３軸圧縮状態になり、面外拘束がない場合より高い圧縮力を負担できることになるため、既存の耐震壁の耐力を向上させることができる。   The seismic wall is constrained in the out-of-plane direction by the restraining material and the fixing device, and in addition to being constrained in the in-plane direction from the surrounding frame, it becomes a triaxial compression state and bears a higher compressive force than when there is no out-of-plane constraint Because it will be possible, the strength of existing seismic walls can be improved.

以下、図面を用いて本発明を実施するための最良の形態を説明する。   Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

図１は耐震壁１の少なくとも片面に繊維シート２が貼り付けられ、その繊維シート２の表面に補強材３が付着させられると共に、拘束材４が耐震壁１中に挿入され、補強材３の表面に定着装置５を介して定着され、耐震壁１が面外方向に拘束されている耐震補強構造の具体例を示す。耐震補強は既設の耐震壁１に限らず、新設の耐震壁１に対しても行われる。拘束材４は１枚の耐震壁１に付き、１本、もしくは複数本使用される。   In FIG. 1, the fiber sheet 2 is attached to at least one surface of the earthquake resistant wall 1, and the reinforcing material 3 is attached to the surface of the fiber sheet 2, and the restraining material 4 is inserted into the earthquake resistant wall 1. A specific example of the seismic reinforcement structure in which the seismic wall 1 is fixed on the surface via the fixing device 5 and restrained in the out-of-plane direction will be described. The seismic reinforcement is performed not only on the existing seismic wall 1 but also on the new seismic wall 1. One or a plurality of restraining members 4 are attached to one seismic wall 1.

繊維シート２には例えば炭素繊維シート、アラミド繊維シート、ポリエステル繊維シート、ビニロン繊維シート等、強化繊維をシート状に連続して形成した材料が使用されるが、引張力の作用方向に補強効果を発揮する繊維シートであれば、繊維素材の種類は問われない。引張力に対する補強方向である強化された繊維の方向は１方向や２方向の他、多方向もあるが、繊維シート２は強化された繊維の方向が補強すべき方向、すなわち耐震壁１の主引張応力方向に向けて配置されることが適切である。   For the fiber sheet 2, for example, a carbon fiber sheet, an aramid fiber sheet, a polyester fiber sheet, a vinylon fiber sheet, or the like is used, which is a material in which reinforcing fibers are continuously formed in a sheet shape. Any fiber material can be used as long as the fiber sheet exhibits. The direction of the reinforced fiber, which is the direction of reinforcement against the tensile force, may be one direction or two directions as well as multiple directions, but the fiber sheet 2 is the direction in which the direction of the reinforced fiber is to be reinforced, that is, the main direction of the earthquake resistant wall 1 It is appropriate to arrange it in the direction of the tensile stress.

図１−（ａ）は無開口の耐震壁１に対し、１方向（長さ方向）に強化された帯状の繊維シート２を水平方向に向けて貼り付け、鉛直方向に複数段配列させた場合を示す。幅方向に隣接する繊維シート２、２は隙間なく配列させられる他、幅方向の端部において互いに重複させられる。ここでは繊維シート２を水平に貼り付けているが、貼り付けの向きは問われず、鉛直方向に、または耐震壁１の隅角部間に傾斜させて貼り付けることもある。繊維シート２は接着剤等により耐震壁１に貼り付けられ、少なくとも補強材３の付着作業までの間、貼り付けられた状態に保たれる。   1- (a) shows a case in which a strip-shaped fiber sheet 2 reinforced in one direction (length direction) is attached to an open earthquake-resistant wall 1 in a horizontal direction and arranged in a plurality of stages in the vertical direction. Indicates. The fiber sheets 2 and 2 adjacent to each other in the width direction are arranged without gaps and are overlapped with each other at the end in the width direction. Here, although the fiber sheet 2 is affixed horizontally, the direction of affixing is not ask | required, and it may affix and incline in the vertical direction or between the corner parts of the earthquake-resistant wall 1. FIG. The fiber sheet 2 is affixed to the earthquake resistant wall 1 with an adhesive or the like, and is maintained in the affixed state at least until the reinforcing material 3 is attached.

繊維シート２の長さ方向の端部は基本的に耐震壁１と柱６１と梁６２からなるフレーム６との境界に揃えられるが、境界からフレーム６側へ張り出し、その張り出し部分において何らかの手段で定着させられることもある。繊維シート２が耐震壁１に張り付けられた状態で繊維シート２の表面全面にモルタル等の補強材３が吹付けや塗布等により付着させられる。   The end in the longitudinal direction of the fiber sheet 2 is basically aligned with the boundary between the earthquake-resistant wall 1 and the frame 6 composed of the pillar 61 and the beam 62. However, the fiber sheet 2 projects from the boundary toward the frame 6 by some means. Sometimes fixed. A reinforcing material 3 such as mortar is attached to the entire surface of the fiber sheet 2 by spraying, coating, or the like while the fiber sheet 2 is attached to the earthquake resistant wall 1.

補強材３が所定の強度を発現するまで硬化した時点で、補強材３と繊維シート２を貫通し、耐震壁１に到達する挿通孔１ａが形成される。挿通孔１ａは図１に示すように耐震壁１を貫通して形成される場合と、図２に示すように耐震壁１の片面から厚さ方向の中途の深さまで形成される場合がある。   When the reinforcing material 3 is cured until it exhibits a predetermined strength, an insertion hole 1a that penetrates the reinforcing material 3 and the fiber sheet 2 and reaches the earthquake resistant wall 1 is formed. The insertion hole 1a may be formed through the earthquake-resistant wall 1 as shown in FIG. 1, or may be formed from one side of the earthquake-resistant wall 1 to an intermediate depth in the thickness direction as shown in FIG.

繊維シート２が耐震壁１の両面に貼り付けられる場合には、挿通孔１ａは図１−（ｂ）のＡ−Ａ線断面図である（ｃ）に示すように耐震壁１を貫通するが、片面にのみ貼り付けられる場合には貫通する場合と中途までの場合がある。挿通孔１ａはコアドリル等の削孔装置により穿設される。   When the fiber sheet 2 is affixed to both surfaces of the earthquake-resistant wall 1, the insertion hole 1a penetrates the earthquake-resistant wall 1 as shown in FIG. When pasted only on one side, there are cases where it penetrates and halfway. The insertion hole 1a is drilled by a drilling device such as a core drill.

挿通孔１ａの形成後、挿通孔１ａ回りの補強材３の表面に、挿通孔を有する定着装置５が配置され、定着装置５からボルトやアンカー等の拘束材４が耐震壁１の挿通孔１ａ中に挿入される。図１−（ｃ）に示すように挿通孔１ａが耐震壁１を貫通する場合、拘束材４は挿通孔１ａを貫通し、耐震壁１の反対側に突出する。拘束材４が突出する耐震壁１の反対側にも定着装置５が配置され、耐震壁１は厚さ方向両側から定着装置５、５に挟み込まれる形になる。   After the insertion hole 1a is formed, the fixing device 5 having the insertion hole is disposed on the surface of the reinforcing material 3 around the insertion hole 1a, and the restraining material 4 such as a bolt or an anchor is inserted from the fixing device 5 into the insertion hole 1a of the earthquake resistant wall 1. Inserted inside. As shown in FIG. 1-(c), when the insertion hole 1 a penetrates the earthquake resistant wall 1, the restraining material 4 penetrates the insertion hole 1 a and protrudes to the opposite side of the earthquake resistant wall 1. The fixing device 5 is also arranged on the opposite side of the earthquake-resistant wall 1 from which the restraining material 4 protrudes, and the earthquake-resistant wall 1 is sandwiched between the fixing devices 5 and 5 from both sides in the thickness direction.

拘束材４がボルトやピン等の場合、反対側から突出した拘束材４の先端にナット４１が締め付けられることにより対向する定着装置５、５間に圧縮力が与えられ、補強材３と繊維シート２、及び耐震壁１が厚さ方向両側から拘束される。定着装置５には鋼材ではプレート、帯板、フラットバー等が単独で、もしくは組み合わせられて使用される。定着装置５は補強後の耐震壁１の質量の上昇を抑える上では耐震壁１全面の内、部分的に配置されるが、質量の上昇の影響が小さい場合には全面に配置されることもある。   When the restraining material 4 is a bolt, a pin or the like, a compression force is applied between the fixing devices 5 and 5 facing each other by tightening a nut 41 to the tip of the restraining material 4 protruding from the opposite side, and the reinforcing material 3 and the fiber sheet. 2 and the seismic wall 1 are restrained from both sides in the thickness direction. The fixing device 5 is made of a steel material such as a plate, a strip, a flat bar, or the like alone or in combination. The fixing device 5 is partially arranged in the entire surface of the earthquake-resistant wall 1 in order to suppress the increase in the mass of the earthquake-resistant wall 1 after reinforcement, but may be arranged on the entire surface when the influence of the increase in mass is small. is there.

図２は無開口の耐震壁１の片面にのみ繊維シート２を貼り付け、その全面に補強材３を付着させ、補強材３の表面に定着装置５と拘束材４を配置した場合を示す。図２に示すように挿通孔１ａが耐震壁１を貫通しない場合、拘束材４は定着装置５と補強材３、及び繊維シート２を貫通し、耐震壁１の厚さ方向の中間部まで挿入される。図２−（ｂ）は（ａ）のＢ−Ｂ線断面図である。なお、耐震壁１の片面にのみ繊維シート２を貼り付ける場合でも、挿通孔１ａが耐震壁１を貫通し、拘束材４も耐震壁１を貫通して反対側で緊結されることもある。   FIG. 2 shows a case where the fiber sheet 2 is attached only to one side of the open-ended earthquake-resistant wall 1, the reinforcing material 3 is adhered to the entire surface, and the fixing device 5 and the restraining material 4 are arranged on the surface of the reinforcing material 3. As shown in FIG. 2, when the insertion hole 1 a does not penetrate the earthquake resistant wall 1, the restraining material 4 penetrates the fixing device 5, the reinforcing material 3, and the fiber sheet 2 and is inserted to the middle portion in the thickness direction of the earthquake resistant wall 1. Is done. FIG. 2- (b) is a cross-sectional view taken along the line BB of (a). Even when the fiber sheet 2 is attached to only one side of the earthquake-resistant wall 1, the insertion hole 1 a may penetrate the earthquake-resistant wall 1, and the restraining material 4 may also penetrate the earthquake-resistant wall 1 and be fastened on the opposite side.

挿通孔１ａが耐震壁１を貫通せず、拘束材４の先端が耐震壁１の中間部で留まる場合には拘束材４にアンカーが使用される。耐震壁１が既設の場合には繊維シート２の貼付面から拘束材４の定着に十分な深さまで穿孔し、その孔に拘束材４としてのあと施工アンカー等のアンカーが挿入される。あと施工アンカーは金属拡張系、接着系を問わずに使用される。アンカーを挿入し、その先端が耐震壁１中に定着された後、その頭部回りに定着装置５が装着される。更に定着装置５から突出したアンカーの頭部にナット４１が締め付けられることによりアンカーに軸力が与えられ、定着装置５から補強材３と繊維シート２、及び耐震壁１に圧縮力が与えられる。   When the insertion hole 1 a does not penetrate the earthquake-resistant wall 1 and the tip of the constraint material 4 stays at the middle part of the earthquake-resistant wall 1, an anchor is used for the constraint material 4. When the seismic wall 1 is already installed, a hole is drilled from the affixing surface of the fiber sheet 2 to a depth sufficient for fixing the restraint material 4, and an anchor such as a post-installed anchor as the restraint material 4 is inserted into the hole. Post-installed anchors can be used regardless of metal expansion or adhesion. After the anchor is inserted and the tip thereof is fixed in the earthquake-resistant wall 1, the fixing device 5 is mounted around the head. Further, the nut 41 is fastened to the head of the anchor protruding from the fixing device 5, whereby an axial force is applied to the anchor, and a compressive force is applied from the fixing device 5 to the reinforcing member 3, the fiber sheet 2, and the earthquake resistant wall 1.

図３は帯状の繊維シート２を耐震壁１の隅角部間に対角線状に貼り付けることにより繊維シート２を引張ブレースとして作用させる場合の具体例を示す。補強材３は少なくとも繊維シート２の貼り付け部分に付着させられ、定着装置５と拘束材４も繊維シート２の貼り付け部分に配置される。   FIG. 3 shows a specific example in which the fiber sheet 2 acts as a tensile brace by sticking the belt-like fiber sheet 2 diagonally between the corners of the earthquake resistant wall 1. The reinforcing material 3 is attached to at least the affixed portion of the fiber sheet 2, and the fixing device 5 and the restraining material 4 are also disposed in the affixed portion of the fiber sheet 2.

図３の場合、補強材３は吹付けであるか、塗布であるかを問わないが、ここでは、繊維シート２の貼り付け部分に確実に補強材３が付着し、貼り付け部分以外に付着しないよう、繊維シート２以外の部分に型枠７を配置している。２枚の繊維シート２を交差させて貼り付けた場合、耐震壁１の中央部における繊維シート２の交わり部分付近に三角形状の領域が形成される。この領域に補強材３を付着させない場合、補強材３が剥離し易くなる可能性があることから、図３ではこの三角形状の領域にも補強材３が付着されるよう、三角形状の領域を除いた部分に型枠７を配置している。   In the case of FIG. 3, it does not matter whether the reinforcing material 3 is sprayed or applied, but here, the reinforcing material 3 is surely adhered to the affixed portion of the fiber sheet 2 and adhered to other than the affixed portion. In order to avoid this, the mold frame 7 is disposed in a portion other than the fiber sheet 2. When the two fiber sheets 2 are crossed and pasted, a triangular region is formed in the vicinity of the intersection of the fiber sheets 2 in the central portion of the earthquake resistant wall 1. If the reinforcing material 3 is not attached to this region, the reinforcing material 3 may be easily peeled off. Therefore, in FIG. 3, a triangular region is used so that the reinforcing material 3 is also attached to this triangular region. The formwork 7 is arranged in the removed part.

補強材３は２枚の交差した繊維シート２、２の表面と前記三角形状の領域に付着させられ、繊維シート２の長さ方向に沿って定着装置５と拘束材４１が配置される。この場合、補強材３の付着により繊維シート２の形態が維持され、繊維シート２が引張ブレースとして機能し、その機能を持続させることが可能になる。図３−（ｃ）は（ｂ）のＣ−Ｃ線断面図である。   The reinforcing material 3 is attached to the surface of the two intersecting fiber sheets 2 and 2 and the triangular region, and the fixing device 5 and the restraining material 41 are arranged along the length direction of the fiber sheet 2. In this case, the form of the fiber sheet 2 is maintained by the adhesion of the reinforcing material 3, and the fiber sheet 2 functions as a tensile brace and can maintain its function. FIG. 3C is a cross-sectional view taken along the line CC of FIG.

補強材３を付着させない領域には図３−（ｃ）に示すように補強材３と同等程度の厚さに、発泡スチロールや耐熱ウール等から成型された型枠７が接着剤や両面テープ等により耐震壁１やフレーム６に貼り付けられる。型枠７は必ずしも補強材３の付着後に取り外される必要はなく、残されることで、保温材や防音材等として活用される。特に耐震壁１が外壁である場合には型枠７が内断熱材、または外断熱材になるため、結露防止にも役立てられる。   In a region where the reinforcing material 3 is not attached, as shown in FIG. 3- (c), a mold 7 molded from foamed polystyrene or heat-resistant wool or the like has a thickness equivalent to that of the reinforcing material 3 by an adhesive or a double-sided tape. Affixed to the seismic wall 1 and the frame 6. The mold 7 does not necessarily need to be removed after the reinforcement material 3 is attached, and is used as a heat insulating material, a soundproof material, or the like by being left behind. In particular, when the seismic wall 1 is an outer wall, the mold 7 becomes an inner heat insulating material or an outer heat insulating material, which is useful for preventing condensation.

図４は繊維シート２による耐震補強によって耐震壁１に付与すべき耐力が比較的小さくて済む場合の耐震補強例である。ここでは耐震壁１の少なくとも周囲に沿って繊維シート２を貼り付け、繊維シート２に重ねて補強材３を付着させ、補強材３に沿って定着装置５と拘束材４を配置した場合を示す。耐震壁１の周囲にのみ補強材３を付着させながらも、繊維シート２を耐震壁１の全面に貼り付けることもある。図４の場合、補強材３の付着領域以外の領域、すなわち耐震壁１の中央部に型枠７が配置される。   FIG. 4 shows an example of seismic reinforcement when the proof stress to be imparted to the seismic wall 1 by the seismic reinforcement by the fiber sheet 2 is relatively small. Here, the fiber sheet 2 is pasted along at least the circumference of the earthquake-resistant wall 1, the reinforcing material 3 is attached to the fiber sheet 2, and the fixing device 5 and the restraining material 4 are disposed along the reinforcing material 3. . The fiber sheet 2 may be attached to the entire surface of the earthquake resistant wall 1 while the reinforcing material 3 is attached only around the earthquake resistant wall 1. In the case of FIG. 4, the mold 7 is disposed in a region other than the region where the reinforcing material 3 is attached, that is, in the central portion of the earthquake-resistant wall 1.

図５〜図７は耐震壁１が開口部８を有する場合に、耐震壁１の両面に繊維シート２を貼り付けた耐震補強の例を示す。図５は開口部８が窓である場合の例を、図６、図７は開口部８が出入り口である場合の例を示す。図示しないが、耐震壁１が開口部８を有する場合に、耐震壁１の片面にのみ繊維シート２を貼り付け、補強材３を付着させる場合もある。   FIGS. 5-7 shows the example of the earthquake-proof reinforcement which affixed the fiber sheet 2 on both surfaces of the earthquake-resistant wall 1 when the earthquake-resistant wall 1 has the opening part 8. FIG. FIG. 5 shows an example where the opening 8 is a window, and FIGS. 6 and 7 show an example where the opening 8 is an entrance. Although not shown, when the earthquake-resistant wall 1 has the opening 8, the fiber sheet 2 may be attached only to one side of the earthquake-resistant wall 1 and the reinforcing material 3 may be attached.

図５に示す繊維シート２は例えば開口部８上の垂れ壁部分と開口部８下の腰壁部分、及び開口部８両側の袖壁部分において開口部８の小口（内周面）を巻き込むようにしながら壁の両面に貼り付けられる。開口部８に面しない部分では図１と同様に水平方向、または鉛直方向に向けて貼り付けられる。この他、開口部８の隅角部付近のひび割れ防止策として、開口部８の隅角部と耐震壁１の隅角部との間に繊維シート２を傾斜させて配置することもある。   The fiber sheet 2 shown in FIG. 5 wraps around the small opening (inner peripheral surface) of the opening 8 in, for example, a drooping wall portion above the opening 8, a waist wall portion below the opening 8, and sleeve wall portions on both sides of the opening 8. It can be pasted on both sides of the wall. The part not facing the opening 8 is attached in the horizontal direction or the vertical direction as in FIG. In addition, as a measure for preventing cracks in the vicinity of the corners of the opening 8, the fiber sheet 2 may be disposed to be inclined between the corner of the opening 8 and the corner of the earthquake resistant wall 1.

繊維シート２が耐震壁１の、開口部８以外の部分に貼り付けられた状態で、図１と同様に繊維シート２の少なくとも表面全面にモルタル等の補強材３が吹付けや塗布等により付着させられる。補強材３が所定の強度を発現するまで硬化した時点で、補強材３と繊維シート２を貫通し、耐震壁１に到達する挿通孔１ａが形成される。図５−（ｃ）は（ｂ）のＥ−Ｅ線の断面を示す。   In a state where the fiber sheet 2 is affixed to a portion of the earthquake resistant wall 1 other than the opening 8, the reinforcing material 3 such as mortar adheres to at least the entire surface of the fiber sheet 2 by spraying or coating as in FIG. Be made. When the reinforcing material 3 is cured until it exhibits a predetermined strength, an insertion hole 1a that penetrates the reinforcing material 3 and the fiber sheet 2 and reaches the earthquake resistant wall 1 is formed. FIG. 5- (c) shows a cross section taken along line EE of (b).

挿通孔１ａの形成後、挿通孔１ａ回りの補強材３の表面に、挿通孔を有する定着装置５が配置され、定着装置５からボルトやアンカー等の拘束材４が耐震壁１の挿通孔１ａ中に挿入される。挿通孔１ａが耐震壁１を貫通する場合には、挿通孔１ａを貫通し、耐震壁１の反対側に突出する拘束材４にも定着装置５が配置され、ナット４１が締め付けられる。ナット４１の締め付けにより対向する定着装置５、５間に圧縮力が与えられ、補強材３と繊維シート２、及び耐震壁１が厚さ方向両側から拘束される。   After the insertion hole 1a is formed, the fixing device 5 having the insertion hole is disposed on the surface of the reinforcing material 3 around the insertion hole 1a, and the restraining material 4 such as a bolt or an anchor is inserted from the fixing device 5 into the insertion hole 1a of the earthquake resistant wall 1. Inserted inside. When the insertion hole 1 a passes through the earthquake-resistant wall 1, the fixing device 5 is also arranged on the restraining material 4 that passes through the insertion hole 1 a and protrudes on the opposite side of the earthquake-resistant wall 1, and the nut 41 is tightened. A compression force is applied between the fixing devices 5 and 5 facing each other by tightening the nut 41, and the reinforcing member 3, the fiber sheet 2, and the earthquake-resistant wall 1 are restrained from both sides in the thickness direction.

繊維シート２が耐震壁１の片面にのみ貼り付けられ、挿通孔１ａが耐震壁１を貫通しない場合には、図２と同様に挿通孔１ａに拘束材４としてあと施工アンカー等のアンカーが使用される。挿通孔１ａが耐震壁１を貫通する場合には拘束材４としてボルトやピンが使用され、頭部の反対側にナット等が締結される。   When the fiber sheet 2 is attached only to one side of the earthquake-resistant wall 1 and the insertion hole 1a does not penetrate the earthquake-resistant wall 1, an anchor such as a post-installed anchor is used as the constraining material 4 in the insertion hole 1a as in FIG. Is done. When the insertion hole 1a penetrates the earthquake-resistant wall 1, a bolt or a pin is used as the restraining material 4, and a nut or the like is fastened to the opposite side of the head.

図６は開口部８が耐震壁１の幅方向（スパン方向）の中間部に形成される場合の耐震補強の例を示す。この場合も図５の場合と同様に、開口部８に面する垂れ壁と袖壁部分に開口部８の小口を巻き込むようにしながら繊維シート２が壁の両面に貼り付けられ、開口部８に面しない部分では水平方向、または鉛直方向に貼り付けられる。ここでも開口部８の隅角部付近のひび割れ防止策として、その隅角部と耐震壁１の隅角部との間に繊維シート２を傾斜させて配置することがある。   FIG. 6 shows an example of seismic reinforcement when the opening 8 is formed in the middle part of the seismic wall 1 in the width direction (span direction). In this case as well, as in the case of FIG. 5, the fiber sheet 2 is adhered to both sides of the wall while winding the fore edge of the opening 8 around the hanging wall and the sleeve wall portion facing the opening 8. The part which does not face is stuck in the horizontal direction or the vertical direction. Again, as a measure for preventing cracks in the vicinity of the corners of the opening 8, the fiber sheet 2 may be inclined between the corners and the corners of the earthquake resistant wall 1.

繊維シート２の貼り付け後、繊維シート２の少なくとも表面全面にモルタル等の補強材３が吹付けや塗布等により付着させられ、補強材３の硬化後、補強材３と繊維シート２を貫通し、耐震壁１に到達する挿通孔１ａが形成される。挿通孔１ａの形成後、挿通孔１ａ回りに定着装置５が配置され、定着装置５から拘束材４が挿通孔１ａ中に挿入され、対向する定着装置５、５間に圧縮力が与えられる。図６−（ｃ）は（ｂ）のＦ−Ｆ線の断面を示す。   After the fiber sheet 2 is pasted, the reinforcing material 3 such as mortar is attached to at least the entire surface of the fiber sheet 2 by spraying or coating, and after the reinforcing material 3 is cured, it penetrates the reinforcing material 3 and the fiber sheet 2. An insertion hole 1a that reaches the earthquake-resistant wall 1 is formed. After the insertion hole 1a is formed, the fixing device 5 is arranged around the insertion hole 1a, and the restraining material 4 is inserted from the fixing device 5 into the insertion hole 1a, and a compressive force is applied between the fixing devices 5 and 5 facing each other. FIG. 6C shows a cross section taken along line FF in FIG.

図７は開口部８が耐震壁１の幅方向（スパン方向）の片側に、柱６１に面して形成される場合の耐震補強の例を示す。この場合も図５、図６と同様の要領で繊維シート２の貼り付け、補強材３の付着、挿通孔１ａの形成、定着装置５と拘束材４の配置、並びに定着装置５、５間への圧縮力の導入が行われる。図７−（ｃ）は（ｂ）のＧ−Ｇ線の断面を示す。   FIG. 7 shows an example of seismic reinforcement when the opening 8 is formed on one side in the width direction (span direction) of the seismic wall 1 so as to face the column 61. Also in this case, the fiber sheet 2 is attached, the reinforcing material 3 is attached, the insertion hole 1a is formed, the fixing device 5 and the restraining material 4 are arranged, and the fixing devices 5 and 5 are inserted in the same manner as in FIGS. The compression force is introduced. FIG. 7- (c) shows a cross section taken along line GG of FIG. 7 (b).

図７のように開口部８が柱６１の一部に面する場合には、柱６１が負担すべき水平せん断力の一部が柱６１に耐震壁１が接続する区間から耐震壁１に伝達され、負担されるのに対し、開口部８に面する区間では柱６１のみが水平せん断力を負担するため、開口部８に面する区間がせん断破壊する可能性がある。そこで、柱６１のせん断破壊を防止するために図７では柱６１の、開口部８に面する区間の回りに繊維シート２を巻き付けている。柱６１の回りの繊維シート２は周回させられ、全面において柱６１に接着剤等により接着させられる。   When the opening 8 faces a part of the column 61 as shown in FIG. 7, a part of the horizontal shear force to be borne by the column 61 is transmitted from the section where the seismic wall 1 is connected to the column 61 to the seismic wall 1. On the other hand, in the section facing the opening 8, only the column 61 bears the horizontal shearing force, so that the section facing the opening 8 may be sheared and broken. Therefore, in order to prevent the shear failure of the column 61, the fiber sheet 2 is wound around the section of the column 61 facing the opening 8 in FIG. The fiber sheet 2 around the column 61 is circulated and adhered to the column 61 with an adhesive or the like on the entire surface.

（ａ）は無開口耐震壁の両面全面に対し、繊維シートを貼り付け、補強材を付着させた様子を示した一部切欠き立面図、（ｂ）は（ａ）の完全な立面図、（ｃ）は（ｂ）のＡ−Ａ線断面図である。(A) is a partially cut-away elevation showing a state in which a fiber sheet is pasted and a reinforcing material is adhered to both surfaces of a non-opening earthquake-resistant wall, and (b) is a complete elevation of (a). FIG. 4C is a cross-sectional view taken along line AA in FIG. （ａ）は無開口耐震壁の片面全面に対し、繊維シートを貼り付け、補強材を付着させた様子を示した立面図、（ｂ）は（ａ）のＢ−Ｂ線断面図である。(A) is an elevational view showing a state in which a fiber sheet is pasted and a reinforcing material is adhered to the entire surface of one side of a non-opening earthquake-resistant wall, and (b) is a sectional view taken along line BB in (a). . （ａ）は無開口耐震壁の両面に対し、繊維シートを交差させて貼り付けた様子を示した立面図、（ｂ）は（ａ）の繊維シートの表面に補強材を付着させた様子を示した立面図、（ｃ）は（ｂ）のＣ−Ｃ線断面図である。(A) is an elevation view showing a state in which a fiber sheet is crossed and pasted on both sides of a non-opening shear wall, and (b) is a state in which a reinforcing material is attached to the surface of the fiber sheet in (a). (C) is the CC sectional view taken on the line of (b). （ａ）は無開口耐震壁の両面に対し、繊維シートを周回させて貼り付け、補強材を付着させた様子を示した立面図、（ｂ）は（ａ）のＤ−Ｄ線断面図である。(A) is an elevation view showing a state in which a fiber sheet is wound around and attached to both surfaces of a non-opening earthquake-resistant wall, and a reinforcing material is attached. (B) is a sectional view taken along the line DD of (a). It is. （ａ）は有開口耐震壁の両面全面に対し、繊維シートを貼り付けた様子を示した立面図、（ｂ）は（ａ）の繊維シートの表面に補強材を付着させた様子を示した立面図、（ｃ）は（ｂ）のＥ−Ｅ線断面図である。(A) is an elevation view showing a state in which a fiber sheet is affixed to both surfaces of the open shear wall, and (b) shows a state in which a reinforcing material is attached to the surface of the fiber sheet in (a). Elevated view, (c) is a cross-sectional view taken along line EE of (b). （ａ）は有開口耐震壁の両面全面に対し、繊維シートを貼り付けた様子を示した立面図、（ｂ）は（ａ）の繊維シートの表面に補強材を付着させた様子を示した立面図、（ｃ）は（ｂ）のＦ−Ｆ線断面図である。(A) is an elevation view showing a state in which a fiber sheet is affixed to both surfaces of the open shear wall, and (b) shows a state in which a reinforcing material is attached to the surface of the fiber sheet in (a). (C) is a sectional view taken along line FF in (b). （ａ）は有開口耐震壁の両面全面及び開口部に面する柱に対し、繊維シートを貼り付けた様子を示した立面図、（ｂ）は（ａ）の繊維シートの表面に補強材を付着させた様子を示した立面図、（ｃ）は（ｂ）のＧ−Ｇ線断面図である。(A) is an elevational view showing a state in which a fiber sheet is attached to the entire surface of both sides of the open shear wall and a column facing the opening, and (b) is a reinforcing material on the surface of the fiber sheet in (a). (C) is the GG sectional view taken on the line of (b).

符号の説明Explanation of symbols

１………耐震壁
１ａ……挿通孔
２………繊維シート
３………補強材
４………拘束材
４１……ナット
５………定着装置
６………フレーム
６１……柱
６２……梁
７………型枠
８………開口部
DESCRIPTION OF SYMBOLS 1 ......... Earthquake-resistant wall 1a ... Insertion hole 2 ... Fiber sheet 3 ... Reinforcement material 4 ... Restraint material 41 ... Nut 5 ... Fixing device 6 ... Frame 61 ... Column 62 ... ... Beam 7 ......... Formwork 8 ......... Opening

Claims (8)

耐震壁の少なくとも片面に繊維シートが貼り付けられ、その繊維シートの表面に補強材が付着させられると共に、拘束材が前記耐震壁中に挿入され、前記補強材の表面に定着装置を介して定着され、前記耐震壁が面外方向に拘束されていることを特徴とする耐震補強構造。   A fiber sheet is affixed to at least one side of the earthquake-resistant wall, and a reinforcing material is attached to the surface of the fiber sheet, and a restraining material is inserted into the earthquake-resistant wall and fixed to the surface of the reinforcing material via a fixing device. And the seismic wall is restrained in an out-of-plane direction. 前記繊維シートは前記耐震壁の隅角部間に交差して貼り付けられていることを特徴とする請求項１に記載の耐震補強構造。   The seismic reinforcement structure according to claim 1, wherein the fiber sheet is pasted between the corners of the seismic wall. 前記繊維シートは前記耐震壁の周辺に沿って貼り付けられていることを特徴とする請求項１に記載の耐震補強構造。   The seismic reinforcement structure according to claim 1, wherein the fiber sheet is affixed along the periphery of the seismic wall. 前記繊維シートは前記耐震壁の全面に貼り付けられ、前記耐震壁に形成された開口部に面する柱の回りに繊維シートが巻き付けられていることを特徴とする請求項１に記載の耐震補強構造。   The seismic reinforcement according to claim 1, wherein the fiber sheet is attached to the entire surface of the earthquake-resistant wall, and the fiber sheet is wound around a column facing an opening formed in the earthquake-resistant wall. Construction. 耐震壁の少なくとも片面に繊維シートを貼り付ける工程と、その繊維シートの表面に補強材を付着させる工程と、拘束材を前記耐震壁中に挿入する工程と、前記拘束材を前記補強材の表面に定着装置を介して定着させ、前記耐震壁を面外方向に拘束する工程とを含むことを特徴とする耐震補強方法。   A step of attaching a fiber sheet to at least one side of the earthquake-resistant wall, a step of attaching a reinforcing material to the surface of the fiber sheet, a step of inserting a constraint material into the earthquake-resistant wall, and a surface of the reinforcement material And fixing the earthquake-resistant wall in an out-of-plane direction. 前記繊維シートを前記耐震壁の隅角部間に交差して貼り付けることを特徴とする請求項５に記載の耐震補強方法。   The seismic reinforcement method according to claim 5, wherein the fiber sheet is pasted between the corners of the seismic wall. 前記繊維シートを前記耐震壁の周辺に沿って貼り付けることを特徴とする請求項５に記載の耐震補強方法。   The seismic reinforcement method according to claim 5, wherein the fiber sheet is attached along the periphery of the seismic wall. 前記繊維シートを前記耐震壁の全面に貼り付け、前記耐震壁に形成された開口部に面する柱の回りに繊維シートを巻き付けることを特徴とする請求項５に記載の耐震補強方法。

6. The earthquake-proof reinforcement method according to claim 5, wherein the fiber sheet is attached to the entire surface of the earthquake-resistant wall, and the fiber sheet is wound around a column facing an opening formed in the earthquake-resistant wall.

JP2006118948A 2006-04-24 2006-04-24 Seismically retrofitting structure and seismically retrofitting method Pending JP2007291665A (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06193280A (en) * 1992-12-25 1994-07-12 Tonen Corp Concrete repairing method with unidirectionally arranged fiber-reinforced sheet
JPH09144334A (en) * 1995-11-27 1997-06-03 Ohbayashi Corp Construction method of reinforcing concrete structure
JPH09203218A (en) * 1996-01-26 1997-08-05 Kajima Corp Earthquake-resistant reinforcing method for existing building
JPH10102791A (en) * 1996-09-30 1998-04-21 Rinotetsuku:Kk Surface reinforcement method of concrete structure
JPH1162269A (en) * 1997-08-26 1999-03-05 Ohbayashi Corp Reinforcing construction method of concrete wall
JP2001329511A (en) * 2000-05-19 2001-11-30 Toho Earthtech Inc Concrete structure and reinforcing method therefor
JP2005207159A (en) * 2004-01-23 2005-08-04 Yuhaso Engineers:Kk Concrete structure reinforcing method using continuous fiber sheet
JP2006057236A (en) * 2003-08-11 2006-03-02 Fujimori Sangyo Kk Reinforcing composite panel for concrete structure, and reinforcing method
JP2006063669A (en) * 2004-08-27 2006-03-09 Univ Of Tokyo Connection device used for reinforcing wall of structure, method of reinforcing wall, and structure for reinforcing wall

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06193280A (en) * 1992-12-25 1994-07-12 Tonen Corp Concrete repairing method with unidirectionally arranged fiber-reinforced sheet
JPH09144334A (en) * 1995-11-27 1997-06-03 Ohbayashi Corp Construction method of reinforcing concrete structure
JPH09203218A (en) * 1996-01-26 1997-08-05 Kajima Corp Earthquake-resistant reinforcing method for existing building
JPH10102791A (en) * 1996-09-30 1998-04-21 Rinotetsuku:Kk Surface reinforcement method of concrete structure
JPH1162269A (en) * 1997-08-26 1999-03-05 Ohbayashi Corp Reinforcing construction method of concrete wall
JP2001329511A (en) * 2000-05-19 2001-11-30 Toho Earthtech Inc Concrete structure and reinforcing method therefor
JP2006057236A (en) * 2003-08-11 2006-03-02 Fujimori Sangyo Kk Reinforcing composite panel for concrete structure, and reinforcing method
JP2005207159A (en) * 2004-01-23 2005-08-04 Yuhaso Engineers:Kk Concrete structure reinforcing method using continuous fiber sheet
JP2006063669A (en) * 2004-08-27 2006-03-09 Univ Of Tokyo Connection device used for reinforcing wall of structure, method of reinforcing wall, and structure for reinforcing wall

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