JP6220542B2 - Fixing structure of tension member - Google Patents

Fixing structure of tension member Download PDF

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JP6220542B2
JP6220542B2 JP2013084684A JP2013084684A JP6220542B2 JP 6220542 B2 JP6220542 B2 JP 6220542B2 JP 2013084684 A JP2013084684 A JP 2013084684A JP 2013084684 A JP2013084684 A JP 2013084684A JP 6220542 B2 JP6220542 B2 JP 6220542B2
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tension member
fixing hole
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近藤 真一
真一 近藤
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ファイベックス株式会社
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Description

本発明は、コンクリートの構造部材を補強するために、引張力に抵抗する帯状部材を該構造部材の表面に貼り付け、端部から該構造部材に引張力が伝達されるように定着する引張部材の定着構造に関するものである。   In order to reinforce a structural member made of concrete, the present invention attaches a band-like member that resists tensile force to the surface of the structural member, and fixes the tensile member so that the tensile force is transmitted from the end to the structural member. It relates to the fixing structure.

既存のコンクリート構造物が耐震性能の不足等によって補強を必要とする場合に、炭素繊維、アラミド繊維、ガラス繊維等の強化繊維を含む補強シート又は強化繊維を束ねた引張部材をコンクリート部材の表面に貼り付けて補強する方法が広く採用されている。フーチングやケーソンの上に立ち上げられた橋脚や基礎上に立ち上げられた柱等、柱状の構造部材の補強は、周方向に強化繊維を含むシートを巻き付けてせん断破壊に対する補強が行われている。しかし、曲げ破壊に対する補強を行うためには貼り付けた補強シートや引張部材の端部をコンクリート部材に対して定着する必要が生じる場合がある。例えば、柱状の構造部材の下端部で生じる大きな曲げモーメントに対して補強を行うときには、部材の軸線方向に繊維を配列した補強シート又は引張部材を貼り付け、その下端部をフーチングや基礎に引張力が伝達されるように定着する必要がある。また、この他にもフランジを有するコンクリートの橋桁をせん断破壊に対して補強する場合、コンクリートの床版と連続する梁や壁と連続する柱のせん断補強を行う場合、コンクリートの壁体を面内方向のせん断に対して補強する場合等においても、引張部材の端部をコンクリート部材に定着することを要する場合がある。   When an existing concrete structure needs reinforcement due to lack of seismic performance, etc., a reinforcing sheet containing reinforcing fibers such as carbon fiber, aramid fiber, glass fiber or a tensile member bundled with reinforcing fibers is applied to the surface of the concrete member. A method of sticking and reinforcing is widely adopted. Reinforcement of columnar structural members such as piers raised on footings and caissons and pillars raised on foundations is reinforced around shear failure by winding sheets containing reinforcing fibers in the circumferential direction. . However, in order to reinforce the bending failure, it may be necessary to fix the attached reinforcing sheet or the end of the tensile member to the concrete member. For example, when reinforcing a large bending moment generated at the lower end of a columnar structural member, a reinforcing sheet or a tension member in which fibers are arranged in the axial direction of the member is pasted, and the lower end is pulled to a footing or foundation. Need to be established so that In addition, when reinforcing concrete bridge girders with flanges against shear failure, when reinforcing the concrete slab with a beam continuous to the floor and a column continuous with the wall, the concrete wall is in-plane. Even when reinforcing in the direction of shearing, it is sometimes necessary to fix the end of the tension member to the concrete member.

強化繊維を含む補強シートや、強化繊維を束ねた引張部材をコンクリート部材に定着する構造として、以下に示すような先行技術がある。
特許文献1に記載の発明では、フーチングに鋼製のアンカーを埋め込み,鋼ブロックをアンカーで固定するとともに、橋脚の側面に貼り付けた補強シートを鋼ブロックに貼り付け、この鋼ブロック及びアンカーを介して補強シートの引張力をフーチングに伝達するものとしている。
また、特許文献2,特許文献3及び特許文献4に記載の発明では、構造部材の表面に貼り付けた補強シートの引張力をコンクリート部材に伝達する手段として、強化繊維を束ねた定着アンカーをコンクリートの構造部材に設けたアンカー穴内に埋め込んで定着するものとしている。
As a structure for fixing a reinforcing sheet containing reinforcing fibers and a tensile member bundled with reinforcing fibers to a concrete member, there are the following prior arts.
In the invention described in Patent Document 1, a steel anchor is embedded in the footing and the steel block is fixed with the anchor, and a reinforcing sheet attached to the side surface of the pier is attached to the steel block, and the steel block and the anchor are interposed therebetween. The tensile force of the reinforcing sheet is transmitted to the footing.
Further, in the inventions described in Patent Document 2, Patent Document 3 and Patent Document 4, as a means for transmitting the tensile force of the reinforcing sheet attached to the surface of the structural member to the concrete member, a fixing anchor in which reinforcing fibers are bundled is applied to the concrete. It is assumed that it is fixed by being embedded in an anchor hole provided in the structural member.

特開平12−96834号公報JP-A-12-96834 特開平11−152931号公報JP-A-11-152931 特開平11−256838号公報Japanese Patent Laid-Open No. 11-256838 特開2000−27446号公報JP 2000-27446 A

コンクリートの構造部材に強化繊維を含む補強シート又は強化繊維を束ねた引張部材を定着する従来の構造又は方法では、次のような改善が望まれる課題がある。
特許文献1に記載されているように鋼ブロックを介して定着する構造又は方法では、コンクリートの構造物外に鋼ブロックを配置しなければならず、構造部材の寸法が大きくなってしまう。また、防錆のため又は引張部材を鋼ブロックに貼り付けた部分を保護するためにコンクリートで巻き立てる必要が生じることもあり、補強のために多くの工程が必要となってしまう。
The conventional structure or method for fixing a reinforcing sheet containing reinforcing fibers or a tensile member in which reinforcing fibers are bundled to a structural member of concrete has the following problems that are desired to be improved.
In the structure or method of fixing via a steel block as described in Patent Document 1, the steel block must be disposed outside the concrete structure, and the size of the structural member increases. Moreover, it may be necessary to wind up with concrete in order to prevent rusting or to protect the portion where the tension member is attached to the steel block, and many steps are required for reinforcement.

また、特許文献2,特許文献3及び特許文献4に記載の発明では、強化繊維の束の引き抜き抵抗を増大するために、強化繊維を束ねた部分に凸部やこぶを設けており、この凸部やこぶを形成する材料として合成樹脂が用いられる。しかし、合成樹脂は変形し易く、充分に引き抜き抵抗の増大効果が得られないことがある。   Further, in the inventions described in Patent Document 2, Patent Document 3 and Patent Document 4, in order to increase the pull-out resistance of the bundle of reinforcing fibers, a convex portion or a hump is provided in a portion where the reinforcing fibers are bundled. Synthetic resin is used as a material for forming the part and the hump. However, the synthetic resin is easily deformed, and the effect of increasing the pulling resistance may not be obtained sufficiently.

本発明は、上記のような事情に鑑みてなされたものであり、その目的は、コンクリートからなる構造部材の表面に貼り付けられた帯状の引張部材を、コンクリートの構造部材に強固に定着することができる引張部材の定着構造を提供することである。   The present invention has been made in view of the circumstances as described above, and an object thereof is to firmly fix a belt-like tensile member attached to the surface of a structural member made of concrete to a structural member of concrete. It is an object of the present invention to provide a fixing structure for a tension member that can be used.

上記課題を解決するために、請求項1に係る発明は、 コンクリートからなる構造部材の表面に、帯状の引張部材が貼り付けられ、 該引張部材の端部が、前記構造部材に穿設された定着穴に挿入され、 該引張部材の端部を埋め込むように前記定着穴内に充填材を充填し、該充填材を硬化させて該引張部材の端部が前記構造部材に定着されており、 前記引張部材の端部の前記定着穴に挿入される部分は、帯状となった面に対して凸状となった部分又は凹状となった部分が該引張部材の軸線方向に配列された折板状に折り曲げられており、 前記引張部材の端部を折板状に折り曲げる折り曲げ線は、帯状となった面の一方の側縁から他方の側縁までが折れ線又は曲線となっている引張部材の定着構造を提供する。 In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that a strip-shaped tensile member is attached to the surface of a structural member made of concrete, and an end portion of the tensile member is formed in the structural member. A filler is inserted into the fixing hole so as to embed the end of the tension member, the filler is cured, and the end of the tension member is fixed to the structural member; The portion to be inserted into the fixing hole at the end of the tension member is a folded plate shape in which the portion that is convex or concave with respect to the band-shaped surface is arranged in the axial direction of the tension member The bending line for bending the end of the tension member into a folded plate shape is fixed to the tension member from one side edge to the other side edge of the belt-like surface. Provide structure.

この定着構造では、引張部材に引張力が作用したときに、引張部材は折り曲げ線による屈曲部分で凹状となった面が密着している硬化した充填材に強く押し付けられる。これにより、コンクリートの構造部材と一体となった充填材と引張部材との摩擦が増大し、引き抜き抵抗が大きくなって、引張部材がコンクリートの構造部材に強固に定着される。   In this fixing structure, when a tensile force is applied to the tension member, the tension member is strongly pressed against the hardened filler in which the concave surface at the bending portion is in close contact. As a result, the friction between the filler integrated with the concrete structural member and the tensile member increases, the pulling resistance increases, and the tensile member is firmly fixed to the concrete structural member.

また、この定着構造で、折り曲げ線が曲線となっていると、2つの折り曲げ線の間で帯状部材の面が曲面となる。また、折り曲げ線が一方の側縁から他方の側縁までの間で折れ線となっていることによって、帯状部材の軸線と傾斜した複数の面が幅方向に組み合わされることになる。このような曲面又は複数の組み合わされた面によって、帯状部材の端部の剛性が向上し、コンクリートの構造部材に穿設された定着穴に挿入する行程及び流動性のある充填材を充填する工程で作業性が向上する。   Further, in this fixing structure, when the fold line is a curve, the surface of the belt-like member becomes a curved surface between the two fold lines. In addition, since the fold line is a fold line between one side edge and the other side edge, the axis of the belt-like member and a plurality of inclined surfaces are combined in the width direction. By such a curved surface or a plurality of combined surfaces, the rigidity of the end portion of the belt-like member is improved, and the step of inserting into the fixing hole drilled in the concrete structural member and the step of filling the fluid filler This improves workability.

請求項2に係る発明は、請求項1に記載の引張部材の定着構造において、 前記引張部材の端部の折板状に折り曲げられた部分は、前記定着穴の入り口に近い位置より該定着穴に挿入された先端付近で、帯状となった面に対して凸状となった部分の高さ又は凹状となった部分の深さが増大しているものとする。   According to a second aspect of the present invention, there is provided the fixing member fixing structure according to the first aspect, wherein a portion of the end of the tensile member that is bent into a folded plate shape is closer to the fixing hole than a position near the entrance of the fixing hole. It is assumed that the height of the convex portion or the depth of the concave portion increases with respect to the band-shaped surface in the vicinity of the tip inserted into the band.

引張部材の端部が周面の付着によって定着された状態であると、引張力が作用したときに引張材の周面と埋め込む部材との間に作用する力は、一般に定着穴の入り口付近で最も大きくなり、定着穴の奥側つまり引張部材の先端側に向かって徐々に減少する。本発明の定着構造では、凸状となった部分の高さ又は凹状となった部分の深さが入り口付近で小さく、先端側で大きくなっていることにより、入り口付近で作用する摩擦力を抑制し、入り口付近で引張材の周面と埋め込む部材との間に作用する力が過度に大きくなるのが抑制される。これにより、引張材の周面と埋め込む部材との間に作用する力が引張部材の軸線方向で均され、引き抜き耐力が向上する。   When the end of the tension member is fixed by adhesion of the peripheral surface, the force acting between the peripheral surface of the tensile material and the embedded member when a tensile force is applied is generally near the entrance of the fixing hole. It becomes the largest and gradually decreases toward the back side of the fixing hole, that is, toward the tip side of the tension member. In the fixing structure of the present invention, the height of the convex portion or the depth of the concave portion is small near the entrance and large at the tip side, thereby suppressing the frictional force acting near the entrance. In addition, an excessively large force acting between the peripheral surface of the tensile material and the embedded member near the entrance is suppressed. Thereby, the force which acts between the surrounding surface of a tension material and the member to embed is equalized in the direction of an axis of a tension member, and drawing-out proof stress improves.

請求項3に係る発明は、請求項1又は請求項2に記載の引張部材の定着構造において、 前記構造部材は、コンクリートからなる基部と、この基部上に連続して立ち上げられた柱状部材であり、 前記引張部材は前記柱状部材の側面に上下方向に貼り付けられ、下端部が前記基部に穿設された定着穴に挿入して定着されているものとする。   According to a third aspect of the present invention, in the fixing structure for a tensile member according to the first or second aspect, the structural member is a base portion made of concrete and a columnar member that is continuously raised on the base portion. The tension member is attached to the side surface of the columnar member in the vertical direction, and the lower end portion is fixed by being inserted into a fixing hole formed in the base portion.

この定着構造では、柱状部材の下端部で作用する大きな曲げモーメントに対して、引張部材の付加によって補強することができるとともに、柱状部材の断面寸法が拡大するのを抑えることができる。   In this fixing structure, it is possible to reinforce the large bending moment acting at the lower end portion of the columnar member by adding a tensile member, and to suppress an increase in the cross-sectional dimension of the columnar member.

請求項4に係る発明は、請求項1又は請求項2に記載の引張部材の定着構造において、 前記構造部材は、コンクリートからなる橋桁であり、 前記引張部材は、該橋桁のウェブの上部から下部にわたって鉛直方向又は傾斜した方向に貼り付けられたものとする。   The invention according to claim 4 is the fixing structure of the tension member according to claim 1 or 2, wherein the structural member is a bridge girder made of concrete, and the tension member is formed from the upper part to the lower part of the web of the bridge girder. It is assumed that it is pasted in a vertical direction or an inclined direction.

この定着構造では、コンクリートからなる橋桁の、主にせん断力に対して抵抗するウェブを有効に補強することができる。なお、本発明における橋桁は、I型の断面であっても良いし、上フランジが上床版として機能するものであっても良い。また、上床版が上フランジとして機能し、下床版が下フランジとして機能する箱形断面の橋桁であっても良い。   In this fixing structure, the web of the bridge girder made of concrete, which mainly resists the shearing force, can be effectively reinforced. The bridge girder in the present invention may have an I-shaped cross section, or the upper flange may function as an upper floor slab. Further, a bridge girder having a box-shaped cross section in which the upper floor slab functions as an upper flange and the lower floor slab functions as a lower flange may be used.

請求項5に係る発明は、請求項1から請求項4までのいずれかに記載の引張部材の定着構造において、 前記引張部材は、軸線方向に連続する多数の繊維を集合させたものであり、 前記定着穴に挿入される端部は、前記繊維間に未硬化の樹脂を含浸させ、折板状に折り曲げられた状態で樹脂を硬化させたものとする。   The invention according to claim 5 is the fixing structure of the tension member according to any one of claims 1 to 4, wherein the tension member is a collection of a large number of continuous fibers in the axial direction. The end inserted into the fixing hole is impregnated with an uncured resin between the fibers, and the resin is cured in a folded state in a folded plate shape.

この引張部材の定着構造では、帯状の引張部材として軸線方向の繊維を含むものを用い、先端部を折板状に容易に加工することができるとともに、コンクリートの構造部材に穿設した定着穴に挿入し、充填材を充填するときにも形状が維持されて作業性が良好となる。   In this fixing structure of the tension member, a belt-shaped tension member including fibers in the axial direction is used, and the tip portion can be easily processed into a folded plate shape, and the fixing hole formed in the structural member of the concrete is used. When inserted and filled with filler, the shape is maintained and workability is improved.

以上説明したように、本発明に係る引張部材の定着構造では、帯状の引張部材に引張力が作用したときに、引張部材は帯状となった面と密着している構造部材に強く押し付けられ、引張部材がコンクリートの構造部材に強固に定着される。   As described above, in the fixing structure of the tension member according to the present invention, when a tensile force is applied to the belt-shaped tension member, the tension member is strongly pressed against the structural member in close contact with the belt-shaped surface, The tension member is firmly fixed to the concrete structural member.

本発明の一実施形態である引張部材の定着構造によって補強された橋脚の断面図である。It is sectional drawing of the pier reinforced by the fixing structure of the tension member which is one Embodiment of this invention. 図1に示す橋脚における引張部材の端部が定着された部分を示す拡大断面図である。It is an expanded sectional view which shows the part to which the edge part of the tension member in the pier shown in FIG. 1 was fixed. 図1に示す橋脚の補強に用いることができる引張部材の端部の形状を示す側面図、平面図、断面図及び折板状に加工された引張部材の展開図である。It is the side view which shows the shape of the edge part of the tension member which can be used for reinforcement of the pier shown in FIG. 1, a top view, sectional drawing, and the expanded view of the tension member processed into folded-plate shape. 図3に示す引張部材の端部の形状を示す概略斜視図である。It is a schematic perspective view which shows the shape of the edge part of the tension member shown in FIG. 図1に示す橋脚の補強に用いることができる他の引張部材の端部の形状を示す側面図、平面図、断面図及び折板状に加工された引張部材である。It is the side view which shows the shape of the edge part of the other tension member which can be used for reinforcement of the pier shown in FIG. 1, a top view, sectional drawing, and the tension member processed into the folded-plate shape. 図5に示す引張部材の端部の形状を示す概略斜視図である。It is a schematic perspective view which shows the shape of the edge part of the tension member shown in FIG. 図1に示す橋脚の補強に用いることができる他の引張部材の端部の形状を示す側面図、平面図、断面図及び展開図である。It is a side view, a top view, a sectional view, and a development view showing the shape of the end of another tension member which can be used for reinforcement of the pier shown in FIG. 図1に示す橋脚の補強に用いることができる他の引張部材の端部の形状を示す側面図、平面図、断面図及び展開図である。It is a side view, a top view, a sectional view, and a development view showing the shape of the end of another tension member which can be used for reinforcement of the pier shown in FIG. 図8に示す引張部材の端部の形状を示す概略斜視図である。It is a schematic perspective view which shows the shape of the edge part of the tension member shown in FIG. 本発明に係る引張部材の定着構造によって補強された橋桁の断面図及び引張部材が定着された部分を示す拡大断面図である。FIG. 5 is a cross-sectional view of a bridge girder reinforced by a fixing structure for a tension member according to the present invention and an enlarged cross-sectional view showing a portion where the tension member is fixed. 本発明の他の実施形態を示す概略断面図である。It is a schematic sectional drawing which shows other embodiment of this invention.

以下、本発明の実施の形態を図に基づいて説明する。
図1は、本発明に係る引張部材の定着構造を採用して補強された橋脚の概略断面図である。また、図2は引張部材の端部が定着された部分の拡大断面図である。
柱状部材である極脚1は、地盤上に形成された基部であるフーチング2上に立設されており、断面形状が橋桁3の幅方向に長く、壁状となっている。この橋脚1の下端部において橋桁3の軸線方向に生じる曲げモーメントに対して補強が行われたものであり、橋桁3の軸線と直角方向となった側面に鉛直方向の引張部材4を付加し、フーチング2に下端部を定着するものとしている。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic cross-sectional view of a pier reinforced by employing a fixing structure for a tension member according to the present invention. FIG. 2 is an enlarged cross-sectional view of a portion where the end of the tension member is fixed.
The pole leg 1 that is a columnar member is erected on a footing 2 that is a base formed on the ground, and has a cross-sectional shape that is long in the width direction of the bridge girder 3 and has a wall shape. The lower end of the bridge pier 1 is reinforced against the bending moment generated in the axial direction of the bridge girder 3, and a vertical tension member 4 is added to the side surface perpendicular to the axis of the bridge girder 3, The lower end is fixed to the footing 2.

上記引張部材4は、アラミド繊維を帯状に束ねたものが用いられており、所定量の素線を束ねてひも状とし、このひも状となった繊維束の複数を横糸とともに帯状に織ったものである。帯状となったときの幅は50mm程度とすることができ、厚さは1mm程度とするのが望ましい。また、大きな引張強度が必要となるときには、このように製作された帯状の部材を複数枚重ね合わせて引張部材とすることもできる。   The tension member 4 is formed by bundling aramid fibers in a band shape, a predetermined amount of strands are bundled into a string shape, and a plurality of the fiber bundles in the string shape are woven in a band shape with a weft thread It is. The width when the belt is formed can be about 50 mm, and the thickness is preferably about 1 mm. Further, when a large tensile strength is required, a plurality of strip-shaped members manufactured in this way can be overlapped to form a tensile member.

上記引張部材4は、極脚1の側面に軸線を上下方向にして、該橋脚1の高さの中位から下端まで貼り付けられ、横方向には所定の間隔で橋脚1の全幅に貼り付けられている。そして、下端部はフーチング2に穿設された定着穴5に挿入され、図2に示すようにモルタル6を充填して硬化させたものとなっており、フーチング2と一体となったモルタル6との付着によって引張部材4からコンクリートのフーチング2に引張力の伝達が可能に定着されている。   The tension member 4 is attached to the side surface of the pole pier 1 with the axis line in the vertical direction from the middle to the bottom of the height of the pier 1 and in the horizontal direction at a predetermined interval to the full width of the pier 1. It has been. The lower end portion is inserted into the fixing hole 5 formed in the footing 2 and is filled with a mortar 6 and cured as shown in FIG. Is attached to the concrete footing 2 so that a tensile force can be transmitted.

定着穴5に挿入して定着される引張部材4の端部4aは、図3及び図4に示すように折板状に加工が施されており、このような形状でモルタル6中に埋め込まれている。この形状は、帯状の引張部材4の幅方向の折り曲げ線11を軸線方向に複数設け、帯状となった引張部材4の一方の面で凸状となる折り曲げ線11aと凹状となる折り曲げ線11bとが交互となるように折り曲げられたものである。また、それぞれの折り曲げ線11は、引張部材4の幅方向における中心付近で折れ曲がり、先端側に突き出した山形となっている。これにともない、折り曲げ線間の面は、幅方向のほぼ中心12cの両側で折板状に連続する2つの平面12a,12bを形成する。このように折り曲げられることにより、図3(a)又は図4に示すように帯状となった面に対して両側へ凸状となった部分13aと凹状となった部分13bとが軸線方向に複数生じた折板状となる。そして、この凸状となった部分13aの高さ及び凹状となった部分13bの深さが、定着穴5に挿入されたときの入り口付近より先端付近で大きくなっている。
図3(d)は上記のように折り曲げたときの展開図であり、凸状となる折り曲げ線11aを一点鎖線で示し、凹状となる折り曲げ線11bを破線で示している。
The end 4a of the tension member 4 to be inserted and fixed in the fixing hole 5 is processed into a folded plate shape as shown in FIGS. 3 and 4, and is embedded in the mortar 6 in such a shape. ing. In this shape, a plurality of bending lines 11 in the width direction of the belt-shaped tension member 4 are provided in the axial direction, and a folding line 11a that is convex on one surface of the belt-shaped tension member 4 and a folding line 11b that is concave. Are bent so as to alternate. Each fold line 11 is bent in the vicinity of the center in the width direction of the tension member 4 and has a mountain shape protruding toward the tip side. Accordingly, the plane between the folding lines forms two flat surfaces 12a and 12b that are continuous in a folded plate shape on both sides of the center 12c in the width direction. By bending in this way, as shown in FIG. 3 (a) or FIG. 4, there are a plurality of portions 13a that are convex on both sides and a portion 13b that is concave in the axial direction. The resulting folded plate shape. The height of the convex portion 13 a and the depth of the concave portion 13 b are greater near the tip than near the entrance when inserted into the fixing hole 5.
FIG. 3D is a developed view when bent as described above, in which the folding line 11a that is convex is indicated by a one-dot chain line, and the folding line 11b that is concave is indicated by a broken line.

なお、上記のように一方の側縁から他方の側縁に至る折り曲げ線11が折れ線となっていることにより、折り曲げ線間で二つに分割された平面12a,12bは、幾何学的に折り曲げる前の展開図と同じ形状及び寸法が維持されるものではないが、引張部材は繊維を束ねたものであって幅方向への伸縮は生じ易く、図3に示すように両側へ凹凸が生じた形状に容易に変形させることが可能である。
また、引張部材4は、繊維を束ねて形成されて厚さを有するものとなっており、折り曲げ線で明確な角度を持って折り曲げられるのではなく、小さな半径の曲線状に曲げられるものである。
As described above, since the fold line 11 extending from one side edge to the other side edge is a fold line, the planes 12a and 12b divided in two between the fold lines are geometrically bent. Although the same shape and dimensions as the previous developed view are not maintained, the tension member is a bundle of fibers, and is easily stretched in the width direction. As shown in FIG. It can be easily transformed into a shape.
Further, the tension member 4 is formed by bundling fibers and has a thickness, and is not bent at a fold line with a clear angle but is bent into a curved shape with a small radius. .

上記のように橋脚1の側面に引張部材4が貼り付けられ、下方の端部4aがフーチング2に定着されていることにより、地震時等において橋脚1に大きな水平力が作用し、橋脚1の下端に曲げモーメントが生じたときに、橋脚1の断面の引張側では、コンクリートに埋め込まれている鉄筋及び表面に貼り付けられた上記引張部材4の引張力によって抵抗する。そして、帯状の引張部材4に引張力が作用することによって下端部のフーチング2に埋め込まれた部分では、凹状となった面が周囲のモルタルに強く押し付けられ、引張部材の引き抜き抵抗が増大する。
また、引張部材4の凸状となった部分13aの高さ及び凹状となった部分13bの深さが、定着穴5に挿入されたときの入り口付近より先端付近で大きくなっていることにより、引張部材4の側面とこの側面と密着するモルタル6との間に作用する付着力が均されて、入り口付近と先端付近とで作用する付着力の差が過大になるのが抑制されている。
As described above, the tensile member 4 is attached to the side surface of the pier 1 and the lower end 4a is fixed to the footing 2, so that a large horizontal force acts on the pier 1 at the time of an earthquake and the like. When a bending moment is generated at the lower end, the tensile strength of the cross section of the pier 1 is resisted by the reinforcing bars embedded in the concrete and the tensile force of the tensile member 4 attached to the surface. And in the part embedded in the footing 2 of the lower end part by the tension | tensile_strength acting on the strip | belt-shaped tension | pulling member 4, the concave surface is strongly pressed against the surrounding mortar, and the pulling-out resistance of a tension | pulling member increases.
Further, the height of the convex portion 13a of the tension member 4 and the depth of the concave portion 13b are larger near the tip than near the entrance when inserted into the fixing hole 5, The adhesion force acting between the side surface of the tension member 4 and the mortar 6 in close contact with this side surface is leveled, and the difference in adhesion force acting between the vicinity of the entrance and the vicinity of the tip is suppressed from becoming excessive.

一方の側縁から他方の側縁に至る折り曲げ線が中央部で先端側に突き出すように折れ線となっている端部の形状は、図5及び図6に示すように折れ線の角度を変更したものを採用することもできる。
この例では、引張部材21の幅方向に設定された折り曲げ線22の先端側へ傾斜する角度が、定着穴に挿入したときの入り口付近に設けられた折り曲げ線22aより先端側に設けられた折り線22bで、先端側に傾斜する角度が増大するものとなっている。また、折り曲げ線の間隔も先端側で大きくなっている。このような形状とすることにより、帯状となった引張部材21の面より凸状となる部分23aの高さ又は凹状となる部分23bの深さを先端側で大きく設定することが容易となる。また、折り曲げた形状としたときに、この引張部材21の曲げ剛性を大きくすることできる。
The shape of the end portion that is a fold line so that the fold line extending from one side edge to the other side edge protrudes toward the tip side at the center portion is obtained by changing the angle of the fold line as shown in FIGS. Can also be adopted.
In this example, the angle of inclination of the fold line 22 set in the width direction of the tension member 21 toward the tip side is the fold line provided on the tip side from the fold line 22a provided near the entrance when inserted into the fixing hole. In the line 22b, the angle inclined toward the front end increases. Further, the interval between the folding lines is also increased on the tip side. By setting it as such a shape, it becomes easy to set largely the height of the part 23a which becomes convex from the surface of the tension member 21 used as the strip | belt shape, or the depth of the part 23b which becomes concave on the front end side. Moreover, when it is set as the bent shape, the bending rigidity of this tension member 21 can be enlarged.

図7は、引張部材の端部における折り曲げ形状の他の例を示す側面図、平面図、断面図及び展開図である。
この例では、引張部材31の一方の側縁から他方の側縁に至る折り曲げ線32が、先端側に凸状となる湾曲した曲線となっており、引張部材31の軸線方向に間隔を開けて複数の折り曲げ線32が設定されている。そして、一方の面で凸状となるように折り曲げられる折り曲げ線32aと凹状に折り曲げられる折り曲げ線32bとが交互に配列され、引張部材31の軸線方向に帯状となった面の両側へ複数の凸状に突き出した部分33が軸線方向に配列されたものとなっている。このように折り曲げ線32に沿って凸状に突き出した部分33が曲線となることによって、上記折り曲げ線32の間の面34は曲面となる。この例において折り曲げ線32の間隔は等間隔でも良いが先端側で間隔を大きくすることもできる。
このように端部31aが折り曲げられた引張部材31も図1に示すようにコンクリートからなる橋脚1の補強に用いることができ、端部がフーチング2に強固に定着されて、橋脚1の下端部を曲げモーメントに対して有効に補強することができる。
FIG. 7 is a side view, a plan view, a cross-sectional view, and a development view showing another example of the bent shape at the end of the tension member.
In this example, a fold line 32 extending from one side edge of the tension member 31 to the other side edge is a curved curve that is convex toward the tip side, and is spaced apart in the axial direction of the tension member 31. A plurality of fold lines 32 are set. Then, the fold lines 32a that are bent so as to be convex on one surface and the fold lines 32b that are bent to be concave are alternately arranged, and a plurality of protrusions are formed on both sides of the belt-like surface in the axial direction of the tension member 31. The protruding portions 33 are arranged in the axial direction. In this manner, the portion 33 protruding in a convex shape along the fold line 32 becomes a curve, whereby the surface 34 between the fold lines 32 becomes a curved surface. In this example, the folding lines 32 may be equally spaced, but the spacing can be increased on the tip side.
As shown in FIG. 1, the tension member 31 with the end 31 a bent as described above can also be used to reinforce the pier 1 made of concrete. The end is firmly fixed to the footing 2, and the lower end of the pier 1 Can be effectively reinforced against bending moments.

図8は、引張部材の端部における折り曲げ形状の他の例を示す側面図、平面図、断面図及び展開図である。また、図9はこの引張部材の端部の折り曲げ形状を示す概略斜視図である。
この例では、帯状となった引張部材41の軸線と直角方向の折り曲げ線42と、軸線に対して45°に傾斜した方向の折り曲げ線43とを組み合わせて折り曲げたものである。軸線と45°に傾斜した方向の折り曲げ線43a,43bは、引張部材41の両側縁における軸線方向の同じ位置から反対側の側縁に向かって形成され、中心線上で交わる。そして、反対側の側縁に到達した位置からは、さらに反対側の側縁に向かって次の折り曲げ線43c、43dが形成されている。両側縁における軸線方向の同じ位置から45°に傾斜して設定された2つの折り曲げ線43a,43bは、帯状となった引張部材41の同じ側に凸となるように折り曲げられる。そして、軸線方向に隣接する傾斜した折り曲げ線43c,43dとは逆方向に凸状となるものである。
引張部材41の軸線と直角方向の折り曲げ線42は、45°に傾斜した折り曲げ線が互いに交わる位置を通るように設定される。そして、交わる傾斜した折り曲げ線43a,43bと逆方向に凸状となるように折り曲げられる。つまり一方の面で凸状となっている傾斜した折り曲げ線43a,43bと交わる直角方向の折り曲げ線42は同じ面で凹状となるように折り曲げられる。
FIG. 8 is a side view, a plan view, a cross-sectional view, and a development view showing another example of the bent shape at the end of the tension member. FIG. 9 is a schematic perspective view showing the bent shape of the end portion of the tension member.
In this example, a bending line 42 perpendicular to the axis of the belt-like tension member 41 and a bending line 43 in a direction inclined at 45 ° with respect to the axis are combined and bent. The bending lines 43a and 43b in the direction inclined by 45 ° with the axis are formed from the same position in the axial direction on both side edges of the tension member 41 toward the opposite side edge, and intersect on the center line. And from the position which reached the side edge of the other side, the following fold line 43c, 43d is formed toward the side edge of the other side further. Two fold lines 43a and 43b set to be inclined at 45 ° from the same position in the axial direction on both side edges are bent so as to be convex on the same side of the belt-like tension member 41. The inclined fold lines 43c and 43d adjacent in the axial direction are convex in the opposite direction.
The fold line 42 perpendicular to the axis of the tension member 41 is set so as to pass through a position where the fold lines inclined at 45 ° intersect each other. And it bend | folds so that it may become convex shape in the reverse direction to the bending line 43a, 43b which inclined. That is, the perpendicular folding line 42 that intersects the inclined folding lines 43a and 43b that are convex on one surface is bent so as to be concave on the same surface.

このような折り曲げ線で折り曲げることにより、図8に示すように、中心線上で山型に先端が突き出した凸状部44aと、同様の形状で反対側に突き出して凹状となった凹状部44bとが交互に形成されたものとなる。軸線と直角方向の折り曲げ線42は、凸状部44a又は凹状部44bの両側方で側縁を内側に折り込むように機能している。
このように折り曲げられた引張部材41も、コンクリート部材に穿設された定着穴に挿入し、モルタルを充填してこのモルタルが硬化したときに、大きな引き抜き抵抗を有する状態でコンクリート部材に定着される。
なお、引張部材41の軸線に対して傾斜した方向の折り曲げ線43は、上記実施の形態において45°となっているが、この角度は45°に限定されるものではなく、適宜に他の角度に設定するものであっても良い。
By bending with such a fold line, as shown in FIG. 8, a convex portion 44a whose tip protrudes in a mountain shape on the center line, and a concave portion 44b which protrudes in the opposite direction and has a concave shape on the center line, Are alternately formed. The fold line 42 perpendicular to the axis functions to fold the side edges inward on both sides of the convex portion 44a or the concave portion 44b.
The tension member 41 bent in this way is also inserted into a fixing hole formed in the concrete member, and when the mortar is filled and the mortar is cured, the tensile member 41 is fixed to the concrete member with a large pulling resistance. .
Note that the bending line 43 in the direction inclined with respect to the axis of the tension member 41 is 45 ° in the above embodiment, but this angle is not limited to 45 °, and other angles are appropriately set. It may be set to.

以上に説明したように帯状となった引張部材の端部を、図3から図9までに示すような形状に折り曲げて折板状にする加工は例えば次のように行うことができる。
折り曲げようとする形状に対応した形状の金型を製作する。この金型は所定の間隔を開けて対応する形状のものが互いに対向するものとする。そして、強化繊維を束ねて又は強化繊維を束ねたひも状体もしくは糸状体を織ることによって形成された帯状の引張部材に流動性を有する状態の合成樹脂を含浸させ、上記金型の間に挟みこむ。金型を両側から押し付けて引張部材を金型の形状に倣った形状に保持した状態で合成樹脂を硬化させ、引張部材を予め定められた折板状に加工する。
As described above, the process of bending the end of the belt-like tension member into a shape as shown in FIGS. 3 to 9 to form a folded plate can be performed, for example, as follows.
A mold having a shape corresponding to the shape to be bent is manufactured. It is assumed that the molds corresponding to each other with a predetermined interval face each other. Then, a belt-like tension member formed by bundling reinforcing fibers or weaving a string-like body or yarn-like body bundled with reinforcing fibers is impregnated with a synthetic resin having fluidity, and sandwiched between the molds. Come on. The synthetic resin is cured in a state where the mold is pressed from both sides and the tension member is held in a shape following the shape of the mold, and the tension member is processed into a predetermined folded plate shape.

次に、本発明に係る引張部材の定着構造を用いて補強することができるコンクリート構造物の他の例について説明する。
図10は、プレストレストコンクリートからなる橋桁の断面図であり、この橋桁51はコンクリートからなる上床版52及び下床版53とこれらを上下に連結するコンクリートのウェブ54とを備えた箱形断面となっている。この橋桁51のウェブ54のせん断力に対する耐力を増大するためにウェブ54の側面に沿って引張部材55を貼り付け、その端部の定着部58に本発明を適用したものである。
Next, another example of a concrete structure that can be reinforced using the fixing structure of the tension member according to the present invention will be described.
FIG. 10 is a cross-sectional view of a bridge girder made of prestressed concrete. The bridge girder 51 has a box-shaped cross section provided with an upper floor slab 52 and a lower floor slab 53 made of concrete and a concrete web 54 that connects them vertically. ing. In order to increase the resistance of the bridge girder 51 to the shearing force of the web 54, a tension member 55 is attached along the side surface of the web 54, and the present invention is applied to the fixing portion 58 at the end.

補強に用いる引張部材55は、端部が図3から図9までに示すものと同じように加工されたものを用いることができ、図10(a)に示すように引張部材55を鉛直方向に貼り付けるものとする。そして、橋桁51の軸線方向に所定の間隔をあけて引張部材55を配列し、橋桁51の軸線方向におけるせん断補強が必要な範囲に貼り付ける。   As the tension member 55 used for reinforcement, a member whose end is processed in the same manner as shown in FIGS. 3 to 9 can be used. As shown in FIG. It shall be pasted. Then, the tension members 55 are arranged at a predetermined interval in the axial direction of the bridge girder 51 and pasted in a range where shear reinforcement in the axial direction of the bridge girder 51 is necessary.

引張部材55は、断面が箱形となった内側でウェブ54の側面に貼り付け、図10(a)及び図10(b)に示すように引張部材の端部55aは上床版52とウェブ54との接合部分及び下床版53とウェブ54との接合部分に穿設した定着穴56に挿入して定着する。この定着穴56はウェブ54の厚さ方向に穿設され、引張部材55の定着に必要な深さとされる。引張部材の定着穴56に挿入される端部55aは、例えば、図3、図5、図7、図8に示すような形状に折り曲げるように加工されたものとし、ウェブ54の側面に貼り付けた部分から折り曲げるように定着穴56に挿入し、モルタル57を充填して硬化させる。このようにコンクリートのウェブ54に付加された引張部材55は、ウェブ54のコンクリート内に埋め込まれたスターラップ又はせん断鋼棒とともに橋桁51に作用するせん断力に抵抗するものとなる。   The tension member 55 is affixed to the side surface of the web 54 inside the box-shaped cross section. As shown in FIGS. 10A and 10B, the end 55a of the tension member has the upper floor slab 52 and the web 54. It is inserted into a fixing hole 56 formed in the joint portion between the lower floor slab 53 and the web 54 and fixed. The fixing hole 56 is formed in the thickness direction of the web 54 and has a depth necessary for fixing the tension member 55. The end portion 55a inserted into the fixing hole 56 of the tension member is processed so as to be bent into a shape as shown in FIG. 3, FIG. 5, FIG. 7, and FIG. It is inserted into the fixing hole 56 so as to be bent from the part, and the mortar 57 is filled and cured. The tension member 55 added to the concrete web 54 in this manner resists the shearing force acting on the bridge girder 51 together with the stirrup or shear steel bar embedded in the concrete of the web 54.

以上に説明した実施の形態では、帯状の引張部材は所定の範囲に貼り付けてその端部を定着穴に挿入して定着されたものであるが、帯状の引張部材は定着穴付近の短い範囲に使用し、橋脚や橋桁の広い範囲に貼り付けられた補強シートに作用する引張力が伝達されるものとしても良い。
このような引張部材が、例えば橋脚の下端の補強に使用されるときには、図11に示すように上下方向の強化繊維を含む補強シート63が橋脚61の側面に貼り付けられる。この補強シート63の下端は橋脚61とフーチング62との接合部付近にあり、補強シート63から直接にはフーチング62に力が伝達されない。この補強シート63からフーチング62に引張力を伝達するものとして帯状の引張部材64が用いられる。
In the embodiment described above, the belt-like tension member is affixed within a predetermined range and the end thereof is inserted into the fixing hole and fixed, but the belt-like tension member is a short range near the fixing hole. It is good also as what transmits the tensile force which acts on the reinforcement sheet affixed on the wide range of a bridge pier or a bridge girder.
When such a tension member is used, for example, for reinforcing the lower end of the pier, a reinforcing sheet 63 including reinforcing fibers in the vertical direction is attached to the side surface of the pier 61 as shown in FIG. The lower end of the reinforcing sheet 63 is in the vicinity of the joint between the bridge pier 61 and the footing 62, and no force is transmitted directly from the reinforcing sheet 63 to the footing 62. A belt-like tension member 64 is used to transmit a tensile force from the reinforcing sheet 63 to the footing 62.

帯状となった引張部材64は、図1に示す例と同様に、フーチング62に間隔を開けて穿設された定着穴65に挿入され、モルタルを充填して定着されており、例えば定着端64aは図3から図9までに示すように折板状に加工が施されている。この引張部材64の定着穴65に挿入される部分と連続して橋脚61の側面に貼り付けられる部分64bは、短く切断されており、この部分で引張部材64に含まれる強化繊維が、図11に示すように扇状に拡げられ、橋脚61の側面に貼り付けられた補強シート63の上に貼り付けられている。短く切断されて扇状に拡げられた部分64bの長さは、補強シート63の上に貼り付けられたときに、接着力によって補強シートの引張力が伝達される長さに設定されて
いる。したがって、橋脚61の下端に曲げモーメントが作用するときには、断面の引張側で補強シート63又は引張部材64に作用する引張力は引張部材の扇状に拡げて貼り付けられた部分64bを介して相互間で伝達され、引張部材64からは定着穴65に挿入して定着された部分を介してフーチング62に引張力が伝達される。
また、その他の構造における補強、例えば図10に示すような橋桁の補強においても同様に、広い範囲に補強シートを貼り付け、その端縁付近に帯状の引張部材を扇状に拡げて貼り付けるとともに、この引張部材を定着穴に挿入して定着することができる。
As in the example shown in FIG. 1, the belt-like tension member 64 is inserted into a fixing hole 65 formed at an interval in the footing 62, filled with mortar, and fixed, for example, a fixing end 64a. Is processed into a folded plate shape as shown in FIGS. A portion 64b attached to the side surface of the bridge pier 61 continuously with the portion inserted into the fixing hole 65 of the tension member 64 is cut short, and the reinforcing fiber contained in the tension member 64 is the portion shown in FIG. As shown in FIG. 4, the sheet is spread in a fan shape and is affixed on a reinforcing sheet 63 affixed to the side surface of the pier 61. The length of the portion 64b that is cut short and widened in a fan shape is set to a length that allows the tensile force of the reinforcing sheet to be transmitted by the adhesive force when the portion 64b is stuck on the reinforcing sheet 63. Therefore, when a bending moment acts on the lower end of the bridge pier 61, the tensile force acting on the reinforcing sheet 63 or the tension member 64 on the tension side of the cross section is mutually expanded via the portion 64b that is spread and attached in the fan shape of the tension member. The tensile force is transmitted from the tension member 64 to the footing 62 through the portion inserted into the fixing hole 65 and fixed.
In addition, in the reinforcement in other structures, for example, in the reinforcement of the bridge girder as shown in FIG. 10, similarly, a reinforcing sheet is applied to a wide range, and a belt-like tension member is extended and attached in the vicinity of the edge, The tension member can be inserted into the fixing hole and fixed.

以上に説明した引張部材の定着構造及びこの定着構造を用いた橋脚又は橋桁の補強構造は、本発明の一実施形態であって、本発明はこれらの実施形態に限定されるものではなく、他の形態で実施することができる。
例えば、上記実施形態では、引張部材としてアラミド繊維を軸線方向に含む帯状の部材を用いているが、アラミド繊維に限定されるものではなく、炭素繊維、ガラス繊維、その他の合成繊維を用いるものであっても良い。また、繊維を軸線方向に配置して束ねたものや、撚った繊維を束ねたもの、束ねた繊維を織ったもの等、様々な形態のものを用いることができる。さらに繊維を有するものに限定されず、帯状の鋼板を用いても良い。鋼板を帯状の引張部材として用いるときには、プレス加工等により、帯状となった鋼板の端部を折板状に曲げ加工しておく。
The fixing member fixing structure and the bridge pier or girder reinforcing structure using the fixing structure described above are one embodiment of the present invention, and the present invention is not limited to these embodiments. It can be implemented in the form.
For example, in the above embodiment, a belt-like member including an aramid fiber in the axial direction is used as the tensile member, but the member is not limited to an aramid fiber, and carbon fiber, glass fiber, or other synthetic fiber is used. There may be. Moreover, the thing of various forms, such as what bundled the fiber arrange | positioned to an axial direction, the thing which bundled the twisted fiber, and the thing which woven the bundled fiber, can be used. Furthermore, it is not limited to what has a fiber, You may use a strip | belt-shaped steel plate. When using a steel plate as a strip-shaped tension member, the end of the strip-shaped steel plate is bent into a folded plate by pressing or the like.

引張部材を定着穴に挿入して定着する端部は、図3から図9までに示す形状に限定されるものではなく、折板状に折り曲げられて引張部材の引き抜き抵抗が増大する形状であれば、その他の形状を採用することができる。
また、引張部材の幅、厚さ、折板状に加工する範囲等も適宜に設計することができる。
一方、定着部材を定着穴に挿入して充填する充填材は、以上に記載した実施の形態ではモルタルを用いているが、他にコンクリートを用いることもできるし、エポキシ樹脂等の合成樹脂や、モルタルやコンクリートに合成樹脂を添加した樹脂モルタル、樹脂コンクリート等を用いることもできる。
The end portion where the tensile member is inserted into the fixing hole and fixed is not limited to the shape shown in FIGS. 3 to 9, but may be bent to a folded plate shape to increase the pulling resistance of the tensile member. For example, other shapes can be employed.
In addition, the width and thickness of the tension member, the range to be processed into a folded plate shape, and the like can be appropriately designed.
On the other hand, the filler for inserting and filling the fixing member into the fixing hole uses mortar in the embodiment described above, but concrete can also be used, synthetic resin such as epoxy resin, Resin mortar obtained by adding a synthetic resin to mortar or concrete, resin concrete, or the like can also be used.

1:橋脚, 2:フーチング, 3:橋桁, 4:引張部材, 4a:引張部材の定着される端部, 5:定着穴, 6:モルタル,
11:幅方向の折り曲げ線, 11a:凸状となる折り曲げ線, 11b:凹状となる折り曲げ線, 12a,12b:折り曲げ線間の面, 12c:引張部材の幅方向の中心, 13a:一方の面において凸状となった部分, 13b:一方の面において凹状となった部分,
21:引張部材, 22:折り曲げ線, 22a:凸状となった折り曲げ線, 22:凹状となった折り曲げ線, 23a:凸状となった部分, 23b:凹状となった部分,
31:引張部材, 31a:引張部材の先端部分, 32:折り曲げ線, 32a:凸状となった折り曲げ線, 32:凹状となった折り曲げ線, 33:凸状となった部分,
34:折り曲げ線の間の面,
41:引張部材, 42:引張部材との軸線と直角方向の折り曲げ線, 43:引張部材の軸線に対して傾斜した折り曲げ線, 43a,43b:凸状となった傾斜した折り曲げ線, 43c,43d:凹状となった傾斜した折り曲げ線, 44a:凸状となった部分, 44b:凹状となった部分,
51:橋桁, 52:上床版, 53:下床版, 54:ウェブ, 55:引張部材, 56:定着穴, 57:モルタル, 58:引張部材の定着部,
61:橋脚, 62:フーチング, 63:補強シート, 64:引張部材, 65:定着穴

1: bridge pier, 2: footing, 3: bridge girder, 4: tension member, 4a: end where the tension member is fixed, 5: fixing hole, 6: mortar,
11: fold line in the width direction, 11a: fold line that becomes convex, 11b: fold line that becomes concave, 12a, 12b: surface between the fold lines, 12c: center in the width direction of the tension member, 13a: one surface 13b: a concave portion on one surface,
21: Tensile member, 22: Bending line, 22a: Bending line that has become convex, 22: Bending line that has become concave, 23a: Part that has become convex, 23b: Part that has become concave,
31: Tensile member, 31a: Tip portion of the tensile member, 32: Folding line, 32a: Bending line having a convex shape, 32: Bending line having a concave shape, 33: Portion having a convex shape,
34: Surface between fold lines,
41: Tensile member, 42: Bend line perpendicular to the axis of the tension member, 43: Bend line inclined with respect to the axis of the tension member, 43a, 43b: Inclined bend lines that are convex, 43c, 43d : Inclined bending line that has become concave, 44a: Part that has become convex, 44b: Part that has become concave,
51: Bridge girder, 52: Upper floor slab, 53: Lower floor slab, 54: Web, 55: Tensile member, 56: Fixing hole, 57: Mortar, 58: Fixing part of tensile member,
61: bridge pier, 62: footing, 63: reinforcement sheet, 64: tension member, 65: fixing hole

Claims (5)

コンクリートからなる構造部材の表面に、帯状の引張部材が貼り付けられ、
該引張部材の端部が、前記構造部材に穿設された定着穴に挿入され、
該引張部材の端部を埋め込むように前記定着穴内に充填材を充填し、該充填材を硬化させて該引張部材の端部が前記構造部材に定着されており、
前記引張部材の端部の前記定着穴に挿入される部分は、帯状となった面に対して凸状となった部分又は凹状となった部分が該引張部材の軸線方向に配列された折板状に折り曲げられており、
前記引張部材の端部を折板状に折り曲げる折り曲げ線は、帯状となった面の一方の側縁から他方の側縁までが折れ線又は曲線となっていることを特徴とする引張部材の定着構造。
A band-shaped tensile member is attached to the surface of a structural member made of concrete,
The end of the tension member is inserted into a fixing hole drilled in the structural member,
A filler is filled in the fixing hole so as to embed the end of the tensile member, the filler is cured, and the end of the tensile member is fixed to the structural member;
The portion to be inserted into the fixing hole at the end of the tension member is a folded plate in which a portion that is convex or a concave portion is arranged in the axial direction of the tension member. Folded into a shape,
The fixing structure for a tension member, wherein the bending line for bending the end portion of the tension member into a folded plate shape is a polygonal line or a curve from one side edge to the other side edge of the band-shaped surface. .
前記引張部材の端部の折板状に折り曲げられた部分は、前記定着穴の入り口に近い位置より該定着穴に挿入された先端付近で、帯状となった面に対して凸状となった部分の高さ又は凹状となった部分の深さが増大していることを特徴とする請求項1に記載の引張部材の定着構造。   The bent portion of the end portion of the tension member has a convex shape with respect to the band-shaped surface near the tip inserted into the fixing hole from a position near the entrance of the fixing hole. 2. The fixing member fixing structure according to claim 1, wherein the height of the portion or the depth of the concave portion is increased. 前記構造部材は、コンクリートからなる基部と、この基部上に連続して立ち上げられた柱状部材であり、
前記引張部材は前記柱状部材の側面に上下方向に貼り付けられ、下端部が前記基部に穿設された定着穴に挿入して定着されていることを特徴とする請求項1又は請求項2に記載の引張部材の定着構造。
The structural member is a base made of concrete, and a columnar member continuously raised on the base,
The said tension member is affixed on the side surface of the said columnar member in the up-down direction, and the lower end part is inserted and fixed to the fixing hole drilled in the said base part, The Claim 1 or Claim 2 characterized by the above-mentioned. The fixing member fixing structure as described.
前記構造部材は、コンクリートからなる橋桁であり、
前記引張部材は、該橋桁のウェブの上部から下部にわたって鉛直方向又は傾斜した方向に貼り付けられたものであることを特徴とする請求項1又は請求項2に記載の引張部材の定着構造。
The structural member is a bridge girder made of concrete,
The tension member fixing structure according to claim 1 or 2, wherein the tension member is attached in a vertical direction or an inclined direction from an upper part to a lower part of the web of the bridge girder.
前記引張部材は、軸線方向に連続する多数の繊維を集合させたものであり、
前記定着穴に挿入される端部は、前記繊維間に未硬化の樹脂を含浸させ、折板状に折り曲げられた状態で樹脂を硬化させたものであることを特徴とする請求項1から請求項4までのいずれかに記載の引張部材の定着構造。
The tensile member is a collection of a large number of continuous fibers in the axial direction,
The end portion inserted into the fixing hole is obtained by impregnating uncured resin between the fibers and curing the resin in a folded state in a folded plate shape. Item 5. A fixing structure of a tension member according to any one of Items 4 to 4.
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