JP3983902B2 - Seismic reinforcement method for columns - Google Patents

Seismic reinforcement method for columns Download PDF

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Publication number
JP3983902B2
JP3983902B2 JP26412798A JP26412798A JP3983902B2 JP 3983902 B2 JP3983902 B2 JP 3983902B2 JP 26412798 A JP26412798 A JP 26412798A JP 26412798 A JP26412798 A JP 26412798A JP 3983902 B2 JP3983902 B2 JP 3983902B2
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Prior art keywords
fiber
wall
column
pillar
fiber bundle
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JP2000096836A (en
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正雄 阪本
博 藤村
光夫 真嶋
茂雄 渡辺
博 井部
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Kajima Corp
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Kajima Corp
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
    • E04G2023/0251—Increasing or restoring the load-bearing capacity of building construction elements by using fiber reinforced plastic elements
    • E04G2023/0262—Devices specifically adapted for anchoring the fiber reinforced plastic elements, e.g. to avoid peeling off

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  • Working Measures On Existing Buildindgs (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、既存の鉄筋コンクリート（ＲＣ）造柱や鉄骨鉄筋コンクリート（ＳＲＣ）造柱の耐震補強方法に関するものである。
【０００２】
【従来の技術】
既存の建物全体の耐震性を向上させる方法の一つに、ＲＣ造柱やＳＲＣ造柱の特に靱性を向上させるものがあり、かかる靱性向上の方法として、従来から既存柱の周面に補強用の鋼板を巻き付けたり、炭素繊維（ＣＦ）、アラミド繊維（ＡＦ）、ガラス繊維（ＧＦ）などを材質とする補強用の繊維シートを巻回する方法がある。
【０００３】
一方、実際には柱が袖壁付き柱や腰壁付き柱及び垂れ壁付き柱のことが多く、袖壁や腰壁及び垂れ壁が柱の補強の妨げとなることがある。かかる場合には従来、図２、図３に示すように柱１の際で壁２を該柱１に沿って切断して、腰壁や袖壁などの壁２を柱１から取り除き、またはスリット10により切り離して、柱１を独立柱の状態にしてから、柱１に鋼板や繊維シートを巻回し、柱１の周囲を閉鎖形にして柱の剪断補強を行う。
【０００４】
あるいは、図４に示すように柱１の際で壁２の側に貫通孔３を水平に設けた後、柱１に繊維シート11を貼着し、剪断力伝達部材として鋼板などによるアングル材12を柱１と壁２との接合部に繊維シート11の上からあてがい、前記貫通孔３にボルト13を貫通してアングル材12を壁２に固定し、このアングル材12で柱１と壁２を一体化して柱１からの剪断力が壁２の側に伝達されるようにするとともに、柱１の外周面の補強を図っている。
【０００５】
さらに、袖壁付きや腰壁付きの柱１に補強部材として繊維シート11を巻回して柱１を補強する場合で、壁の存在によって柱１を独立した閉鎖形の状態にできないときは、図５、図６に示すように剪断力伝達部材として繊維束４を使用し、該繊維束４を壁２に設けた貫通孔３に挿通し壁２からの突出端部を柱１に巻回した繊維シート11に定着し、柱１の剪断力を繊維束４に集中して壁２の表裏に伝達するようにして補強する方法がある。かかる繊維束４の定着方法は、図５、図７に示すように壁２からの突出部分を柱１にそって扇状に広げて、この扇状部分５を繊維シート11の上に貼着する。
【０００６】
【発明が解決しようとする課題】
繊維シート11は、柱の剪断補強を図り靱性を向上させるためにその繊維方向が柱１の軸線方向と直交するように柱１の周面に巻回してある。このため、図７に示すように壁２の貫通孔３に挿通した繊維束４は扇状部分５では、その中央部分５ａの繊維方向は繊維シート11の繊維方向と一致するが、周辺部分５ｂは一致せず繊維シート11の繊維方向と角度を有することになる。
【０００７】
その結果、柱１や壁２に一定の力が加わったとき、図８に示すように周辺部分５ｂで繊維シート11が柱１と剥離し、柱１から壁２への剪断力の伝達が中央部分５ａと周辺部分５ｂとで不均等になり、柱１の靱性を十分に向上させることが困難である。
【０００８】
また、図９に示すように袖壁や腰壁などの壁２の壁面が柱１の外面と垂直面でほぼ一致する場合は、貫通孔３から突出した繊維束４の突出部分を柱１の角部にそってほぼ直角に曲げる必要がある。ところが、繊維束４に使用する繊維は炭素繊維がほとんどで、この炭素繊維はストランドに剛性があるために、これをほぼ直角に曲げることが困難であることから、貫通孔３の端部に位置する柱１の角部を円弧状部３ａに加工する必要があり、施工性がよくない。
【０００９】
本発明の目的は前記従来例の不都合を解消し、壁に存在によって柱を閉鎖形の状態で補強できない場合、補強のために剪断力伝達部材として繊維束を使用するときに、剪断力を壁の両側に各部均等に確実に伝達できて、柱の靭性を確実に向上でき、施工性もよい柱の耐震補強方法を提供することにある。
【００１０】
【課題を解決するための手段】
本発明は前記目的を達成するため、第１に、壁付き柱の耐震補強方法であって、柱の近傍に位置させ壁側に該壁を貫通させて壁への剪断力伝達部材としての繊維束を取り付ける柱の耐震補強方法において、前記柱の周面に該柱の軸線方向と直交する方向に繊維方向を合致させて補強部材としての繊維シートを巻回するとともに、軸線方向にも繊維方向を合致させて繊維シートを取り付け、前記繊維束の壁からの突出部分を扇状に広げてこの扇状部分を柱の周面に軸線方向およびこれと直交する方向に巻回した繊維シートに定着し、柱の軸線方向に繊維方向を合致させて取り付けられる繊維シートの取付部位を、壁から突出する繊維束の扇状部分が定着される部位のみとすることを要旨とするものである。
【００１１】
第２に、壁を貫通させて取り付ける繊維束は柔らかく、かつ、強度を有するアラミド系繊維束とすることを要旨とするものである。
【００１２】
請求項１記載の本発明によれば、補強しようとする柱には該柱の軸線方向と直交する方向だけでなく、軸線方向にも補強部材としての繊維シートを取り付けたから、壁に取り付けた繊維束の壁からの突出部分を扇状に広げてこの扇状部分を柱の外面に貼着すれば、扇状部分は軸線方向およびこれと直交する方向の両方向に巻回した繊維シートに定着されるから、柱や壁に一定の力が加わったときに扇部分の特定箇所だけが繊維シートから剥離することがなく、剪断力は繊維束を介して壁側に均等に伝達されて柱の靱性が向上する。
【００１３】
さらに、柱の軸線方向に繊維方向を合致させて取付ける繊維シートは、壁から突出する繊維束の扇状部分が定着される部位にだけさらに貼着するだけでよいから、増し貼りの範囲が少なくてすみ、施工性がよい。
【００１４】
請求項２記載の本発明によれば、前記作用に加えて、繊維束に柔らかく、かつ、強度を有するアラミド系繊維束を使用することで、その突出部分を柱にそって簡単に折り曲げることができ、柱と壁の面が垂直面でほぼ一致している場合でも施工性がよい。
【００１５】
【発明の実施の形態】
以下、図面について本発明の実施の形態を詳細に説明する。図１は本発明の柱の耐震補強方法の実施形態を示す縦断側面図で、従来例として示した図６の縦断側面図の右半分部分に相当する個所を示すものであり、図中、図３〜図10に示した従来例と同一の構成要素については同一の参照符号を附してある。
【００１６】
本発明でも耐震補強しようとする袖壁や腰壁付きの柱１の際に位置させて、壁２に貫通孔３を水平に削孔しておく。次いで、柱１の外面には炭素繊維（ＣＦ）、アラミド繊維（ＡＦ）、ガラス繊維（ＧＦ）などを材質とする補強用の繊維シート６を貼着するための下地処理を施し、その上にさらに下地との密着性を良好にするためのプライマー、接着用樹脂を塗布しておく。
【００１７】
そして、柱１の外面に該柱１の軸線方向（縦方向）に繊維方向が合致する繊維シート６ａを貼着し、さらにこの上に、柱１の軸線方向と直交する方向（横方向）に繊維方向が合致する繊維シート６ｂを貼着する。前記軸線方向の繊維シート６ａは柱１に対して後述の繊維束４の扇状部分５が定着される部位にのみ貼着した。
【００１８】
一方、前記貫通孔３に壁２への剪断力伝達部材としての繊維束４を挿通する。この繊維束４に使用する繊維は、柔らかく、かつ、強度を有するものとしてアラミド系繊維とした。
【００１９】
この繊維束４は従来と同様に貫通孔３から端部を突出させ、この突出部分を柱１にそって縦方向に約90°の扇状に広げ、この扇状部分５を樹脂を用いて柱１に接着してある繊維シート６の上に貼着する。なお、必要に応じて柱１の軸線方向の繊維シート６ａと軸線方向と直交する方向の繊維シート６ｂとをさらに増加して貼着することもできる。
【００２０】
このようにして貫通孔３に挿通した繊維束４の突出部分である扇状部分５を柱１に貼着した繊維シート６に接着したならば、貫通孔３に樹脂などによる充填剤を充填して繊維束４を貫通孔３に固定し、最後に柱１や壁２に表面仕上げを施す。
【００２１】
次に作用について説明すると、柱１に地震などにより所定の振動が加わると、柱１に生じた剪断力は繊維シート６を介して繊維束４に伝達される。この場合、剪断力を繊維束４に集中させる必要があるが、柱１の軸線と直交する方向の力は、柱１の軸線と直交する方向に貼着した繊維シート６ｂで負担し、壁２にそって柱１の軸線方向の分力は、柱１の軸線方向に増貼りにより設けた繊維シート６ａで負担する。
【００２２】
これにより、繊維束４の繊維シート６に接着した扇状部分５のうちの周辺部分５ｂの箇所において繊維シート６を剥離させようとする力に対しては、剥離しようとする力を吸収する方向である柱１の軸線方向に繊維シート６ａが貼着してあるから、繊維シート６が剥離することはなく、柱１の剪断力は繊維シート６を介して繊維束４の扇状部分５の中央部分５ａだけでなく周辺部分５ｂにも均等に伝達され、繊維束４に集中されて壁２の表裏に伝達される。よって、壁２の存在によって柱１を閉鎖形の状態で補強できない場合であっても、繊維束４によって柱１の剪断補強が図れる。
【００２３】
そして、柱１と壁２との外面が垂直面でほぼ同一面に位置する場合には、壁２に取り付けた繊維束４を柱１の方向にほぼ直角に折り曲げる必要があるが、繊維束４は前記のように柔らかく、かつ、強度を有するものとしてアラミド系繊維を使用しているから、容易に折り曲げられる。よって、繊維束４を折り曲げやすいように、貫通孔３の端部開口を面取りして円弧状に加工する必要がない。
【００２４】
【発明の効果】
以上述べたように本発明の柱の耐震補強方法は、剪断力を壁に設けた剪断力伝達部材である繊維束に集中させて壁の表裏に伝達するに際し、柱に取り付ける補強部材に繊維シートを使用する場合は、繊維束と繊維シートとの貼着部において繊維シートの剥離を防止し、繊維シートから繊維束に剪断力が確実に伝達されるようにしたから、柱の靱性を確実に向上できる。
【００２５】
また、補強部材に鋼板や繊維強化プラスチック（ＦＲＰ）を使用する場合は、繊維束を簡単に鋼板に定着でき施工性の向上が図れる。
【図面の簡単な説明】
【図１】 本発明の柱の耐震補強方法の実施形態を示す縦断側面図である。
【図２】 従来の柱の耐震補強方法の第１例を示す横断平面図である。
【図３】 従来の柱の耐震補強方法の第１例を示す正面図である。
【図４】 従来の柱の耐震補強方法の第２例を示す横断平面図である。
【図５】 従来の柱の耐震補強方法の第３例を示す縦断側面図である。
【図６】 従来の柱の耐震補強方法の第３例を示す横断平面図である。
【図７】 従来の柱の耐震補強方法の第３例を示す要部の縦断側面図である。
【図８】 従来の柱の耐震補強方法の第３例を示す説明図である。
【図９】 従来の柱の耐震補強方法の第３例を示す要部の横断平面図である。
【符号の説明】
１…柱 ２…壁
３…貫通孔 ３ａ…円弧状部
４…繊維束 ５…扇状部分
５ａ…中央部分 ５ｂ…周辺部分
６，６ａ，６ｂ…繊維シート
10…スリット 11…繊維シート
12…アングル材 13…ボルト[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seismic reinforcement method for existing reinforced concrete (RC) columns and steel reinforced concrete (SRC) columns.
[0002]
[Prior art]
One way to improve the earthquake resistance of the entire existing building is to improve the toughness of RC columns and SRC columns in particular. Or a reinforcing fiber sheet made of carbon fiber (CF), aramid fiber (AF), glass fiber (GF), or the like.
[0003]
On the other hand, in many cases, the pillar is actually a pillar with a sleeve wall, a pillar with a waist wall, and a pillar with a drooping wall, and the sleeve wall, the waist wall, or the drooping wall may hinder the reinforcement of the pillar. In such a case, conventionally, as shown in FIGS. 2 and 3 , the wall 2 is cut along the pillar 1 along the pillar 1, and the wall 2 such as the waist wall or the sleeve wall is removed from the pillar 1 or is slit. After separating by 10 and making the pillar 1 an independent pillar state, a steel plate or a fiber sheet is wound around the pillar 1, and the pillar 1 is closed around the pillar 1 to perform shear reinforcement.
[0004]
Alternatively, as shown in FIG. 4 , after the through hole 3 is horizontally provided on the wall 2 side in the case of the pillar 1, the fiber sheet 11 is stuck to the pillar 1, and the angle member 12 made of a steel plate or the like is used as a shearing force transmission member. Is attached to the joint between the pillar 1 and the wall 2 from above the fiber sheet 11, the bolt 13 is passed through the through-hole 3 and the angle member 12 is fixed to the wall 2. Are integrated so that the shearing force from the column 1 is transmitted to the wall 2 side, and the outer peripheral surface of the column 1 is reinforced.
[0005]
Furthermore, in case of reinforcing the column 1 by winding the fiber sheet 11 as a reinforcing member in the pillar 1 with a sleeve walled and waist walls, when unable to the state of the closed form independent pillar 1 by the presence of the wall, FIG. 5, the fiber bundle 4 is used as a shearing force transmission member as shown in FIG. 6 , the fiber bundle 4 is inserted into the through hole 3 provided in the wall 2, and the protruding end portion from the wall 2 is wound around the column 1. There is a method of reinforcing the fiber sheet 11 so that the shearing force of the column 1 is concentrated on the fiber bundle 4 and transmitted to the front and back of the wall 2. In the fixing method of the fiber bundle 4, as shown in FIGS. 5 and 7 , the protruding portion from the wall 2 is spread out in a fan shape along the pillar 1, and the fan-shaped portion 5 is stuck on the fiber sheet 11.
[0006]
[Problems to be solved by the invention]
The fiber sheet 11 is wound around the circumferential surface of the column 1 so that the fiber direction is orthogonal to the axial direction of the column 1 in order to enhance the toughness by shear reinforcement of the column. For this reason, as shown in FIG. 7 , the fiber bundle 4 inserted through the through hole 3 of the wall 2 is a fan-shaped portion 5, and the fiber direction of the central portion 5 a coincides with the fiber direction of the fiber sheet 11, but the peripheral portion 5 b is They do not match and have an angle with the fiber direction of the fiber sheet 11.
[0007]
As a result, when a certain force is applied to the pillar 1 and the wall 2, the fiber sheet 11 is separated from the pillar 1 at the peripheral portion 5b as shown in FIG. 8 , and the transmission of the shearing force from the pillar 1 to the wall 2 is central. The portion 5a and the peripheral portion 5b are uneven, and it is difficult to sufficiently improve the toughness of the column 1.
[0008]
9, when the wall surface of the wall 2 such as the sleeve wall or the waist wall substantially coincides with the outer surface of the column 1 and the vertical surface, the protruding portion of the fiber bundle 4 protruding from the through hole 3 is used as the protruding portion of the column 1. It is necessary to bend at almost right angles along the corners. However, most of the fibers used for the fiber bundle 4 are carbon fibers, and since the carbon fibers are rigid in the strands, it is difficult to bend them almost at right angles. It is necessary to process the corner portion of the pillar 1 to be arc-shaped portion 3a, and the workability is not good.
[0009]
The object of the present invention is to eliminate the disadvantages of the conventional example, and in the case where the column cannot be reinforced in a closed state due to the presence of the wall, the shear force is applied to the wall when the fiber bundle is used as the shear force transmission member for reinforcement. An object of the present invention is to provide a method for seismic reinforcement of a column that can be reliably transmitted to both sides of the column, can reliably improve the toughness of the column, and has good workability.
[0010]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention provides a method for seismic reinforcement of a walled column, which is a fiber serving as a shearing force transmission member to the wall by being positioned in the vicinity of the column and penetrating the wall on the wall side. in seismic reinforcement method pillar attaching the bundle, together with winding a fiber sheet as a reinforcing member made to match the fiber direction in a direction perpendicular to the axial direction of the columnar the peripheral surface of the pillar, the fiber direction in the axial direction The fiber sheet is attached by matching, and the protruding part from the wall of the fiber bundle is fanned out, and the fan shaped part is fixed to the fiber sheet wound in the axial direction and the direction orthogonal to the peripheral surface of the column , The gist of the invention is that the attachment part of the fiber sheet attached with the fiber direction aligned with the axial direction of the column is only the part where the fan-shaped part of the fiber bundle protruding from the wall is fixed .
[0011]
Secondly , the gist of the fiber bundle attached through the wall is a soft and strong aramid fiber bundle.
[0012]
According to the first aspect of the present invention, since the fiber sheet as the reinforcing member is attached to the column to be reinforced not only in the direction orthogonal to the axial direction of the column but also in the axial direction, the fiber attached to the wall If the fan-shaped part is spread on the outer surface of the pillar by spreading the protruding part from the wall of the bundle in a fan shape, the fan-shaped part is fixed to the fiber sheet wound in both the axial direction and the direction orthogonal thereto, When a certain force is applied to the pillar or wall, only a specific part of the fan part does not peel from the fiber sheet, and the shearing force is evenly transmitted to the wall side through the fiber bundle, improving the toughness of the pillar. .
[0013]
Furthermore, the fiber sheet attached with the fiber direction aligned with the axial direction of the column only needs to be further attached only to the part where the fan-shaped part of the fiber bundle protruding from the wall is fixed. Well, workability is good.
[0014]
According to the second aspect of the present invention, in addition to the above-described function, by using an aramid fiber bundle that is soft and strong in the fiber bundle, the protruding portion can be easily bent along the column. The workability is good even when the surface of the column and the wall are almost the same in the vertical plane.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Figure 1 is a vertical sectional side view showing an implementation form of earthquake-proof reinforcement method of the pillars of the present invention, which shows the positions corresponding to the right half portion of the longitudinal side view of Figure 6 showing the conventional example, in the figure, The same components as those of the conventional example shown in FIGS. 3 to 10 are denoted by the same reference numerals.
[0016]
In the present invention, the through holes 3 are drilled horizontally in the wall 2 so as to be positioned at the time of the pillars 1 with sleeve walls and waist walls to be seismically reinforced. Next, the outer surface of the pillar 1 is subjected to a base treatment for adhering a reinforcing fiber sheet 6 made of carbon fiber (CF), aramid fiber (AF), glass fiber (GF), or the like. Further, a primer for improving adhesion to the base and an adhesive resin are applied in advance.
[0017]
And the fiber sheet 6a which a fiber direction corresponds to the axial direction (longitudinal direction) of this pillar 1 is stuck on the outer surface of the pillar 1, and also in the direction (lateral direction) orthogonal to the axial direction of the pillar 1 on this. A fiber sheet 6b having a matching fiber direction is attached. Fiber sheet 6a of the axial direction was attached only to the portion where the fan-shaped portion 5 of the fiber bundle 4 to be described later are fixed relative to the pillar 1.
[0018]
On the other hand, a fiber bundle 4 as a shearing force transmission member to the wall 2 is inserted through the through hole 3. The fiber used for the fiber bundle 4 was an aramid fiber as soft and strong.
[0019]
The fiber bundle 4 has an end projecting from the through-hole 3 in the same manner as in the prior art, and the projecting portion is spread in a fan shape of about 90 ° in the vertical direction along the column 1. It sticks on the fiber sheet 6 adhere | attached on. In addition, the fiber sheet 6a of the axial direction of the pillar 1 and the fiber sheet 6b of the direction orthogonal to an axial direction can be further increased as needed, and can be affixed.
[0020]
Thus, if the fan-shaped part 5 which is the protrusion part of the fiber bundle 4 inserted through the through hole 3 is bonded to the fiber sheet 6 adhered to the pillar 1, the through hole 3 is filled with a filler such as a resin. The fiber bundle 4 is fixed to the through-hole 3, and finally the column 1 and the wall 2 are subjected to surface finishing.
[0021]
Next, the operation will be described. When a predetermined vibration is applied to the column 1 due to an earthquake or the like, the shearing force generated in the column 1 is transmitted to the fiber bundle 4 through the fiber sheet 6. In this case, it is necessary to concentrate the shearing force on the fiber bundle 4, but the force in the direction orthogonal to the axis of the column 1 is borne by the fiber sheet 6 b attached in the direction orthogonal to the axis of the column 1, and the wall 2 Accordingly, the component force in the axial direction of the column 1 is borne by the fiber sheet 6a provided by additional bonding in the axial direction of the column 1.
[0022]
Thereby, in the direction which absorbs the force which is going to peel with respect to the force which is going to peel the fiber sheet 6 in the location of the peripheral part 5b of the fan-shaped parts 5 adhere | attached on the fiber sheet 6 of the fiber bundle 4 Since the fiber sheet 6 a is stuck in the axial direction of a certain pillar 1, the fiber sheet 6 is not peeled off, and the shearing force of the pillar 1 is the central part of the fan-shaped part 5 of the fiber bundle 4 via the fiber sheet 6. It is transmitted equally not only to 5 a but also to the peripheral portion 5 b, concentrated on the fiber bundle 4 and transmitted to the front and back of the wall 2. Therefore, even if the pillar 1 cannot be reinforced in the closed state due to the presence of the wall 2, the fiber bundle 4 can be used to perform shear reinforcement of the pillar 1.
[0023]
And, in the case where the outer surface of the pillar 1 and the wall 2 is positioned on substantially the same plane in the vertical plane, it is necessary to bend substantially at a right angle to the fiber bundle 4 attached to the wall 2 in the direction of the column 1, the fiber bundle Since 4 is soft and has an aramid fiber as described above, it is easily bent. Therefore, it is not necessary to chamfer the end opening of the through hole 3 and process it into an arc shape so that the fiber bundle 4 can be easily bent.
[0024]
【The invention's effect】
As described above, the method for seismic reinforcement of a column according to the present invention is a method in which a shearing force is concentrated on a fiber bundle which is a shearing force transmission member provided on a wall and transmitted to the front and back of the wall. Is used, the fiber sheet is prevented from peeling off at the bonding part between the fiber bundle and the fiber sheet, and the shearing force is reliably transmitted from the fiber sheet to the fiber bundle. It can be improved.
[0025]
Further, when a steel plate or fiber reinforced plastic (FRP) is used for the reinforcing member, the fiber bundle can be easily fixed to the steel plate, and the workability can be improved.
[Brief description of the drawings]
1 is a vertical sectional side view showing the implementation form of earthquake-proof reinforcement method of the pillars of the present invention.
FIG. 2 is a cross-sectional plan view showing a first example of a conventional method for seismic reinforcement of columns.
FIG. 3 is a front view showing a first example of a conventional seismic reinforcement method for a column.
FIG. 4 is a cross-sectional plan view showing a second example of the conventional seismic reinforcement method for columns.
FIG. 5 is a longitudinal side view showing a third example of the conventional seismic reinforcement method for columns.
FIG. 6 is a cross-sectional plan view showing a third example of the conventional seismic reinforcement method for columns.
FIG. 7 is a longitudinal sectional side view of an essential part showing a third example of the conventional seismic reinforcement method for columns.
FIG. 8 is an explanatory diagram showing a third example of a conventional seismic reinforcement method for columns.
FIG. 9 is a cross-sectional plan view of the main part showing a third example of the conventional seismic reinforcement method for columns.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Column 2 ... Wall 3 ... Through-hole 3a ... Arc-shaped part 4 ... Fiber bundle 5 ... Fan-shaped part 5a ... Central part 5b ... Peripheral part 6, 6a, 6b ... Fiber sheet
10 ... Slit 11 ... Fiber sheet
12 ... Angle material 13 ... Bolt

Claims (2)

壁付き柱の耐震補強方法であって、柱の近傍に位置させ壁側に該壁を貫通させて剪断力伝達部材としての繊維束を取り付ける柱の耐震補強方法において、前記柱の周面に該柱の軸線方向と直交する方向に繊維方向を合致させて補強部材としての繊維シートを巻回するとともに、軸線方向にも繊維方向を合致させて繊維シートを取り付け、前記繊維束の壁からの突出部分を扇状に広げてこの扇状部分を柱の周面に軸線方向およびこれと直交する方向に巻回した繊維シートに定着し、柱の軸線方向に繊維方向を合致させて取り付けられる繊維シートの取付部位を、壁から突出する繊維束の扇状部分が定着される部位のみとすることを特徴とする柱の耐震補強方法。A method for seismic reinforcement of a column with a wall, the method comprising the method of seismic reinforcement of a column that is positioned near the column and penetrates the wall to the wall side and attaches a fiber bundle as a shearing force transmission member. A fiber sheet as a reinforcing member is wound by matching the fiber direction in a direction perpendicular to the axial direction of the column, and the fiber sheet is attached by matching the fiber direction also in the axial direction and protruding from the wall of the fiber bundle. Installation of a fiber sheet that is fanned out and fixed on a fiber sheet that is wound around the pillar in the axial direction and in a direction perpendicular thereto , and the fiber direction is aligned with the axial direction of the pillar A method for seismic reinforcement of a column, wherein the part is only a part where a fan-shaped part of a fiber bundle protruding from a wall is fixed . 壁を貫通させて取り付ける繊維束は柔らかく、かつ、強度を有するアラミド系繊維束とする請求項１に記載の柱の耐震補強方法。 The method of seismic reinforcement of a column according to claim 1, wherein the fiber bundle attached through the wall is a soft and strong aramid fiber bundle .
JP26412798A 1998-09-18 1998-09-18 Seismic reinforcement method for columns Expired - Lifetime JP3983902B2 (en)

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EP3216944B1 (en) * 2013-06-06 2021-09-29 Sika Technology Ag Assembly for reinforcing support structures
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