JP6181393B2 - Movement restriction device - Google Patents

Movement restriction device Download PDF

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JP6181393B2
JP6181393B2 JP2013050121A JP2013050121A JP6181393B2 JP 6181393 B2 JP6181393 B2 JP 6181393B2 JP 2013050121 A JP2013050121 A JP 2013050121A JP 2013050121 A JP2013050121 A JP 2013050121A JP 6181393 B2 JP6181393 B2 JP 6181393B2
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steel material
bridge girder
movement
long steel
restriction device
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JP2014173407A (en
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工藤　伸司
伸司 工藤
佳 隈部
佳 隈部
智也 黒田
智也 黒田
格 加藤
格 加藤
石橋　忠良
忠良 石橋
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JR East Consultants Co
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本発明は、橋桁が橋脚や橋台などの下部構造物から離反しないようにする移動制限装置に関する。   The present invention relates to a movement restriction device for preventing a bridge girder from separating from a substructure such as a pier or an abutment.

従来、橋桁が橋脚や橋台などの下部構造物から離反しないようにする移動制限装置としては、柱状鋼材を橋台に埋設し、この鋼材により橋桁の移動を制限する構造のものが知られている。   Conventionally, as a movement restricting device for preventing a bridge girder from separating from a lower structure such as a pier or an abutment, a structure in which a columnar steel material is embedded in the abutment and the movement of the bridge girder is restricted by this steel material is known.

このようなもの一例として、例えば、特許文献１（特開平３−２１７０３号公報）には、橋脚または橋台に一体に埋設されたアンカーバーを有する橋梁用アンカー装置が開示されている。
特開平３−２１７０３号公報 As an example of this, for example, Patent Document 1 (Japanese Patent Laid-Open No. 3-21703) discloses a bridge anchor device having an anchor bar embedded in a bridge pier or an abutment.
JP-A-3-21703

図９は従来の移動制限装置の概要を説明する図である。図９に示す、従来の移動制限装置としては、柱状鋼材が橋台に埋設されたものである。図９（Ａ）は正常状態を示しており、図９（Ｂ）は、橋桁に地震時において想定される慣性力が加わり、柱状鋼材が変形することで橋桁が移動しようとするエネルギーを吸収し、橋桁の移動を制限している状態を示している。このような従来の方法の場合、柱状鋼材の曲げ及びせん断抵抗によって橋桁の移動を制限しており、柱状鋼材の寸法が大きくなったり、埋設された柱状鋼材周囲の橋台の補強が大規模になったりして、コストが増大する、という問題があった。   FIG. 9 is a diagram for explaining the outline of a conventional movement restriction device. As a conventional movement restriction device shown in FIG. 9, a columnar steel material is embedded in an abutment. Fig. 9 (A) shows a normal state, and Fig. 9 (B) absorbs the energy that the bridge girder is about to move due to deformation of the columnar steel material due to the inertia force assumed at the time of the earthquake being applied to the bridge girder. This shows the state where the movement of the bridge girder is restricted. In the case of such a conventional method, the movement of the bridge girder is limited by the bending and shear resistance of the columnar steel material, and the size of the columnar steel material becomes large or the reinforcement of the abutment around the buried columnar steel material becomes large. In some cases, the cost increases.

また、従来の移動制限装置では、地震などにより柱状鋼材又は柱状鋼材周囲の橋台が損壊した場合、これを交換、修復するための工事にも多大なコスト、時間を要する、という問題があった。   Further, in the conventional movement restriction device, when the columnar steel material or the abutment around the columnar steel material is damaged due to an earthquake or the like, there is a problem that it takes much cost and time for the work to replace and repair it.

上記問題を解決するために、請求項１に係る発明は、下部構造物上に設置される橋桁の移動を制限する移動制限装置において、前記橋桁の移動方向と、長手方向が平行である長尺鋼材を設け、前記橋桁の移動に伴い、前記長尺鋼材が前記長手方向に伸びることで、前記橋桁が移動しようとするエネルギーを吸収し、前記橋桁の移動を制限し、前記長尺鋼材の一端が、前記下部構造物上に固定されている固定ブロックに取り付けられ、前記長尺鋼材の他端が、前記下部構造物上に固定されない前記下部構造物上にある可動ブロックに取り付けられることを特徴とする。
In order to solve the above-mentioned problem, the invention according to claim 1 is the movement restricting device for restricting the movement of the bridge girder installed on the lower structure, wherein the moving direction of the bridge girder and the longitudinal direction are parallel to each other. A steel material is provided, and along with the movement of the bridge girder, the long steel material extends in the longitudinal direction, so that the bridge girder absorbs energy to be moved, restricts the movement of the bridge girder, and ends of the long steel material. Is attached to a fixed block fixed on the lower structure, and the other end of the long steel material is attached to a movable block on the lower structure that is not fixed on the lower structure. And

本発明に係る移動制限装置１００は、長尺鋼材１７０が長手方向に伸びることで、橋桁
５０が移動しようとするエネルギーを吸収し、橋桁５０の移動を制限する構成であり、このような本発明に係る移動制限装置１００によれば、過大な寸法の柱状鋼材を利用する必要がなく、コストを低減することが可能となる。また、本発明に係る移動制限装置１００によれば、地震などにより長尺鋼材１７０が損壊した場合でも、簡単にこれを交換することができるので、交換工事のコストも低減することが可能となる。 The movement restricting device 100 according to the present invention is configured to absorb the energy that the bridge girder 50 is about to move and to limit the movement of the bridge girder 50 as the long steel material 170 extends in the longitudinal direction. According to the movement restricting device 100 according to the above, it is not necessary to use an excessively large columnar steel material, and the cost can be reduced. Further, according to the movement restriction device 100 according to the present invention, even when the long steel material 170 is damaged due to an earthquake or the like, it can be easily replaced, so that the cost of replacement work can be reduced. .

本発明の実施形態に係る移動制限装置１００が用いられている橋梁の断面構造の概略を示す図である。It is a figure which shows the outline of the cross-section of a bridge in which the movement restriction apparatus 100 which concerns on embodiment of this invention is used. 本発明の実施形態に係る移動制限装置１００を断面構造の概略を示す図である。It is a figure showing the outline of a section structure of movement restriction device 100 concerning an embodiment of the present invention. 地震時において橋桁５０が移動した状態を示す図である。It is a figure which shows the state which the bridge girder 50 moved at the time of an earthquake. 橋桁５０の移動に伴い伸びた長尺鋼材１７０を示す図である。It is a figure which shows the long steel material 170 extended with the movement of the bridge girder. 鋼材に働く荷重と当該荷重を受ける鋼材の変形量の関係を示す図である。It is a figure which shows the relationship between the load which acts on steel materials, and the deformation amount of the steel materials which receive the said load. 本発明の他の実施形態に係る移動制限装置１００が用いられている橋梁の断面構造の概略を示す図である。It is a figure which shows the outline of the cross-sectional structure of the bridge in which the movement limitation apparatus 100 which concerns on other embodiment of this invention is used. 本発明の他の実施形態に係る移動制限装置１００が用いられている橋梁の断面構造の概略を示す図である。It is a figure which shows the outline of the cross-sectional structure of the bridge in which the movement limitation apparatus 100 which concerns on other embodiment of this invention is used. 本発明の他の実施形態に係る移動制限装置１００を断面構造の概略を示す図である。It is a figure which shows the outline of a cross-sectional structure of the movement restriction apparatus 100 which concerns on other embodiment of this invention. 従来の移動制限装置の概要を説明する図である。It is a figure explaining the outline | summary of the conventional movement restriction | limiting apparatus.

以下、本発明の実施の形態を図面を参照しつつ説明する。図１は本発明の実施形態に係る移動制限装置１００が用いられている橋梁の断面構造の概略を示す図であり、図２は本発明の実施形態に係る移動制限装置１００を断面構造の概略を示す図である。また、図２は、図１における点線で囲まれている部分を拡大して示した図である。本実施形態に係る移動制限装置１００では、左右対称のものが２つ設けられることで、橋桁５０が橋台１０の左右に脱落しないように移動を規制するようになっている。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an outline of a cross-sectional structure of a bridge in which a movement restricting device 100 according to an embodiment of the present invention is used, and FIG. 2 is an outline of the cross-sectional structure of the movement restricting device 100 according to an embodiment of the present invention. FIG. FIG. 2 is an enlarged view of a portion surrounded by a dotted line in FIG. In the movement restricting device 100 according to the present embodiment, by providing two symmetrical ones, the movement of the bridge girder 50 is restricted so as not to drop off to the left and right of the abutment 10.

橋台１０には支承３０が設けられており、この支承３０上に橋桁５０が載置されている。   The abutment 10 is provided with a support 30, and a bridge girder 50 is placed on the support 30.

移動制限装置１００は、橋桁５０が下部構造物である橋台１０から離反しないようにするものであり、地震時などで橋桁５０が、移動しようとしたとき、この移動を直接的に規制する可動ブロック１５０と、橋台１０上に固定されている固定ブロック１１０と、固定ブロック１１０と可動ブロック１５０との間を連結する長尺鋼材１７０と、を有している。   The movement restriction device 100 prevents the bridge girder 50 from separating from the abutment 10 as a substructure, and when the bridge girder 50 tries to move during an earthquake or the like, a movable block that directly regulates this movement. 150, a fixed block 110 fixed on the abutment 10, and a long steel material 170 connecting the fixed block 110 and the movable block 150.

固定ブロック１１０は、橋台１０に埋設された複数のアンカー部材１４０によって、橋台１０に固定されている。また、固定ブロック１１０には貫通穴である固定側鞘部１１３が、また、可動ブロック１５０には貫通穴である可動側鞘部１５３が設けられている。   The fixed block 110 is fixed to the abutment 10 by a plurality of anchor members 140 embedded in the abutment 10. The fixed block 110 is provided with a fixed-side sheath 113 that is a through-hole, and the movable block 150 is provided with a movable-side sheath 153 that is a through-hole.

長尺鋼材１７０は、上記のような固定側鞘部１１３及び可動側鞘部１５３に挿通されると共に、固定ブロック１１０側では固定側抜け止め部材１１５が長尺鋼材１７０に取り付けられ、また、可動ブロック１５０側では可動側抜け止め部材１５５が長尺鋼材１７０に取り付けられることで、固定ブロック１１０と長尺鋼材１７０と可動ブロック１５０とが連結されている。   The long steel material 170 is inserted into the fixed side sheath portion 113 and the movable side sheath portion 153 as described above, and the fixed side retaining member 115 is attached to the long steel material 170 on the fixed block 110 side, and is movable. On the block 150 side, the movable-side retaining member 155 is attached to the long steel material 170, so that the fixed block 110, the long steel material 170, and the movable block 150 are connected.

固定側抜け止め部材１１５や可動側抜け止め部材１５５としては、例えば、ナットのようなものを利用することができるし、その他の任意の締結構造を採用することができる。
ただし、長尺鋼材１７０が機能し、これが伸びてしまった際に、長尺鋼材１７０の交換を容易とするために、固定側抜け止め部材１１５や可動側抜け止め部材１５５は、長尺鋼材１７０からの着脱が容易である構造であることが好ましい。また、固定側抜け止め部材１１５や可動側抜け止め部材１５５が長尺鋼材１７０から着脱容易であることに加え、さらに、長尺鋼材１７０自体が固定ブロック１１０や可動ブロック１５０から着脱容易である構造も好ましい実施態様である。 As the fixed-side retaining member 115 and the movable-side retaining member 155, for example, a nut or the like can be used, and any other fastening structure can be adopted.
However, in order to facilitate replacement of the long steel material 170 when the long steel material 170 functions and expands, the fixed-side retaining member 115 and the movable-side retaining member 155 are provided with the long steel material 170. It is preferable that the structure be easy to attach and detach. Further, in addition to the fixed-side retaining member 115 and the movable-side retaining member 155 being easily detachable from the long steel material 170, the long steel material 170 itself is easily detachable from the fixed block 110 and the movable block 150. Is also a preferred embodiment.

図３は地震時において橋桁５０が移動した状態を示す図である。また、図４は橋桁５０の移動に伴い、伸びた長尺鋼材１７０を示す図である。また、図４は、図３における点線で囲まれている部分を拡大して示した図である。   FIG. 3 is a diagram showing a state in which the bridge girder 50 has moved during an earthquake. FIG. 4 is a view showing a long steel material 170 that is elongated along with the movement of the bridge girder 50. FIG. 4 is an enlarged view of a portion surrounded by a dotted line in FIG.

上記のように構成される長尺鋼材１７０の長手方向は、地震時、橋桁５０が移動すると想定される方向と平行とされている。これにより、地震などで、橋桁５０が移動するのに伴い、長尺鋼材１７０が長手方向に伸びることで、橋桁５０が移動しようとするエネルギーを吸収し、橋桁５０の移動を制限するものである。   The longitudinal direction of the long steel material 170 configured as described above is parallel to the direction in which the bridge girder 50 is assumed to move during an earthquake. Thereby, as the bridge girder 50 moves due to an earthquake or the like, the long steel material 170 extends in the longitudinal direction, thereby absorbing the energy that the bridge girder 50 is about to move and restricting the movement of the bridge girder 50. .

本発明に係る移動制限装置１００においては、長尺鋼材１７０の長手方向が伸びることで、橋桁５０の移動のエネルギーを吸収するようにしているが、このような方法によれば、従来技術より効果的に橋桁５０の移動のエネルギーを吸収できる構造とすることができる。この理由を、以下に説明する。   In the movement restricting device 100 according to the present invention, the longitudinal direction of the long steel material 170 is extended to absorb the energy of movement of the bridge girder 50. However, according to such a method, it is more effective than the prior art. Thus, a structure capable of absorbing the energy of movement of the bridge girder 50 can be obtained. The reason for this will be described below.

本発明に係る移動制限装置１００においては、長尺鋼材１７０の長手方向の引っ張り変形によって、橋桁５０が移動する力に対して抗するものである。一方、従来の移動制限装置では、柱状鋼材の曲げ変形やせん断変形で、橋桁５０が移動する力に対して抗するように設計されていた。   In the movement restricting device 100 according to the present invention, the tensile force in the longitudinal direction of the long steel material 170 is resisted against the force that the bridge girder 50 moves. On the other hand, the conventional movement restriction device is designed to resist the force of the bridge girder 50 moving due to bending deformation or shear deformation of the columnar steel material.

図５は、鋼材に働く荷重と当該荷重を受ける鋼材の変形量の関係を示す図で、縦軸は荷重、横軸は変形量を示す。また図中のδｙは鋼材が降伏する時点の変形量、δｕは鋼材が破壊する時点の変形量を示し、μ＝δｕ／δｙの値は、鋼材が降伏から破壊までに変形によって吸収するエネルギーの大きさを示す指標である。   FIG. 5 is a diagram showing the relationship between the load acting on the steel material and the deformation amount of the steel material that receives the load. The vertical axis represents the load, and the horizontal axis represents the deformation amount. In the figure, δy indicates the amount of deformation when the steel material yields, δu indicates the amount of deformation when the steel material breaks, and the value of μ = δu / δy is the energy absorbed by the deformation of the steel material from yield to fracture. It is an index indicating the size.

鋼材が、それぞれ曲げ、せん断、引っ張り荷重を受ける際の前記の比μの値は、
μ（引っ張り）＞μ（曲げ）＞μ（せん断）
であるため、本発明に係る移動制限装置１００によれば、従来技術に比較して鋼材のエネルギー吸収能力を有効に活用できる。 The value of the ratio μ when the steel material is subjected to bending, shearing, and tensile load, respectively,
μ (tensile)> μ (bend)> μ (shear)
Therefore, according to the movement restricting device 100 according to the present invention, the energy absorbing ability of the steel material can be effectively utilized as compared with the prior art.

以上、本発明に係る移動制限装置１００は、長尺鋼材１７０が長手方向に伸びることで、橋桁５０が移動しようとするエネルギーを吸収し、橋桁５０の移動を制限する構成であり、このような本発明に係る移動制限装置１００によれば、従来技術より効果的に橋桁５０の移動のエネルギーを吸収できる構造とすることができる。   As described above, the movement restricting device 100 according to the present invention is configured to absorb the energy that the bridge girder 50 is about to move and to limit the movement of the bridge girder 50 as the long steel material 170 extends in the longitudinal direction. According to the movement restricting device 100 according to the present invention, it is possible to provide a structure that can absorb the energy of movement of the bridge girder 50 more effectively than the prior art.

また従来の移動制限装置では、地震などにより柱状鋼材又は、埋め込まれた柱状鋼材周囲の橋台が損壊した場合、これを交換・修復するための工事に多大なコスト、時間、手間を要する、という問題があった。これに対し、本発明に係る移動制限装置１００では、長尺鋼材１７０の耐力を、移動制限装置１００を構成するその他の部材の耐力より低く設定する事により、地震などにより長尺鋼材１７０が損壊した場合でも、固定ブロック１１０、可動ブロック１５０及び固定ブロック１１０を橋台１０に固定するアンカー部材１４０などは損傷を受けない構造とすることが可能である。そして、このような本発明に係る移動制限装置１００によれば、長尺鋼材１７０を交換するのみで移動制限装置１００を復元することができるので、交換工事のコストや手間、時間も低減することが可能となる。   In addition, in the conventional movement restriction device, when the columnar steel material or the abutment around the embedded columnar steel material is damaged due to an earthquake or the like, it takes a lot of cost, time, and labor for the work to replace and repair it. was there. On the other hand, in the movement restriction device 100 according to the present invention, the long steel material 170 is damaged by an earthquake or the like by setting the proof strength of the long steel material 170 lower than the proof stress of other members constituting the movement restriction device 100. Even if it does, the anchor member 140 etc. which fix the fixed block 110, the movable block 150, and the fixed block 110 to the abutment 10 can be made into a structure which is not damaged. And according to such a movement restriction device 100 concerning the present invention, since movement restriction device 100 can be restored only by exchanging long steel material 170, the cost, labor, and time of replacement work can also be reduced. Is possible.

次に本発明の他の実施形態について説明する。図６は本発明の他の実施形態に係る移動制限装置１００が用いられている橋梁の断面構造の概略を示す図である。   Next, another embodiment of the present invention will be described. FIG. 6 is a diagram showing an outline of a cross-sectional structure of a bridge in which a movement restriction device 100 according to another embodiment of the present invention is used.

先の実施形態においては、固定ブロック１１０と可動ブロック１５０が長尺鋼材１７０により連結される構成が左右対称で設けられた構造であったが、これに対して、本実施形態においては、中央に固定ブロック１１０が１つ設けられ、この固定ブロック１１０に対して、２つの可動ブロック１５０が左右で長尺鋼材１７０により連結される構造となっている。   In the previous embodiment, the configuration in which the fixed block 110 and the movable block 150 are connected by the long steel material 170 is a structure provided symmetrically, but in the present embodiment, in the center, One fixed block 110 is provided, and two movable blocks 150 are connected to the fixed block 110 by a long steel material 170 on the left and right.

このような構造によれば、これまで説明した本発明に係る移動制限装置１００の効果を享受することが可能となると共に、固定ブロック１１０を１つにまとめることができ、設置工事等をより簡略化することが可能となる。   According to such a structure, it is possible to enjoy the effects of the movement restriction device 100 according to the present invention described so far, and it is possible to combine the fixed blocks 110 into one, further simplifying the installation work and the like. Can be realized.

次に本発明の他の実施形態について説明する。図７は本発明の他の実施形態に係る移動制限装置１００が用いられている橋梁の断面構造の概略を示す図である。   Next, another embodiment of the present invention will be described. FIG. 7 is a diagram showing an outline of a cross-sectional structure of a bridge in which a movement restriction device 100 according to another embodiment of the present invention is used.

これまで説明した実施形態においては、通常時、可動ブロック１５０と橋桁５０とが離間する構造であったが、図７に係る他の実施形態では、通常時、可動ブロック１５０と橋桁５０とが当接する構造となっている。   In the embodiment described so far, the movable block 150 and the bridge girder 50 are normally separated from each other. However, in another embodiment according to FIG. It has a structure that touches.

このような構造によれば、これまで説明した本発明に係る移動制限装置１００の効果を享受することが可能となると共に、橋台１０上のレイアウトをよりコンパクトにできる、というメリットもある。さらに、これまで説明した本発明に係る移動制限装置１００では、可動ブロック１５０と橋桁５０とが離間した構造であったので、地震の慣性力が作用した橋桁５０は、可動ブロック１５０により規制されるまで移動していたのに対し、本実施形態に係る移動制限装置１００では、最初から可動ブロック１５０と橋桁５０とが当接する構造となっているため、地震の慣性力が作用した時の橋桁５０の移動量をより少なくすることができる。   According to such a structure, it is possible to enjoy the effects of the movement restriction device 100 according to the present invention described so far, and there is an advantage that the layout on the abutment 10 can be made more compact. Further, in the movement restriction device 100 according to the present invention described so far, the movable block 150 and the bridge girder 50 are separated from each other. Therefore, the bridge girder 50 on which the inertia force of the earthquake acts is regulated by the movable block 150. In contrast, the movement restriction device 100 according to the present embodiment has a structure in which the movable block 150 and the bridge girder 50 are in contact with each other from the beginning. Therefore, the bridge girder 50 when the inertia force of the earthquake is applied. The amount of movement of can be reduced.

次に本発明の他の実施形態について説明する。図８は本発明の他の実施形態に係る移動制限装置１００を断面構造の概略を示す図である。   Next, another embodiment of the present invention will be described. FIG. 8 is a diagram showing an outline of a cross-sectional structure of a movement limiting device 100 according to another embodiment of the present invention.

これまで説明した実施形態においては、長尺鋼材１７０の一端側が固定ブロック１１０に、また、長尺鋼材１７０の他端側が可動ブロック１５０に取り付けられた構造であったが、図８に係る他の実施形態においては、可動ブロック１５０を省略し、長尺鋼材１７０の他端側を直接橋桁５０に取り付けられた構造としている。   In the embodiments described so far, one end side of the long steel material 170 is attached to the fixed block 110, and the other end side of the long steel material 170 is attached to the movable block 150. In the embodiment, the movable block 150 is omitted and the other end of the long steel material 170 is directly attached to the bridge girder 50.

長尺鋼材１７０の他端側を橋桁５０に取り付けるためには、例えば、橋桁５０に貫通穴である橋桁側鞘部１８３を設けておき、長尺鋼材１７０を固定側鞘部１１３及び橋桁側鞘部１８３に挿通させると共に、固定ブロック１１０側では固定側抜け止め部材１１５が長尺鋼材１７０に取り付けられ、また、橋桁５０側では橋桁側抜け止め部材１８５が長尺鋼材１７０に取り付けられることで、固定ブロック１１０と長尺鋼材１７０と橋桁５０とを連結させることができる。   In order to attach the other end of the long steel material 170 to the bridge girder 50, for example, the bridge girder 50 is provided with a bridge girder side sheath portion 183 that is a through hole, and the long steel material 170 is fixed to the fixed side sheath portion 113 and the bridge girder side sheath. The fixed-side retaining member 115 is attached to the long steel material 170 on the fixed block 110 side, and the bridge-girder-side retaining member 185 is attached to the long steel material 170 on the bridge girder 50 side. The fixed block 110, the long steel material 170, and the bridge girder 50 can be connected.

以上のような実施形態によれば、これまで説明した本発明に係る移動制限装置１００の効果を享受することが可能となると共に、さらに、可動ブロック１５０などの構造物が不要となるので、橋台１０上のレイアウトをよりコンパクトできたり、或いは資材に要するコストを低減したりすることが可能となる。   According to the embodiment as described above, the effects of the movement restriction device 100 according to the present invention described so far can be enjoyed, and further, a structure such as the movable block 150 is not required. 10 can be made more compact, or the cost required for materials can be reduced.

１０・・・橋台
３０・・・支承
５０・・・橋桁
１００・・・移動制限装置
１１０・・・固定ブロック
１１３・・・固定側鞘部
１１５・・・固定側抜け止め部材
１４０・・・アンカー部材
１５０・・・可動ブロック
１５３・・・可動側鞘部
１５５・・・可動側抜け止め部材
１７０・・・長尺鋼材
１８３・・・橋桁側鞘部
１８５・・・橋桁側抜け止め部材 DESCRIPTION OF SYMBOLS 10 ... Abutment 30 ... Bearing 50 ... Bridge girder 100 ... Movement restriction device 110 ... Fixed block 113 ... Fixed side sheath part 115 ... Fixed side retaining member 140 ... Anchor Member 150 ... Movable block 153 ... Movable side sheath 155 ... Movable side retaining member 170 ... Long steel 183 ... Bridge girder side sheath 185 ... Bridge girder side retaining member

Claims (1)

下部構造物上に設置される橋桁の移動を制限する移動制限装置において、
前記橋桁の移動方向と、長手方向が平行である長尺鋼材を設け、
前記橋桁の移動に伴い、前記長尺鋼材が前記長手方向に伸びることで、
前記橋桁が移動しようとするエネルギーを吸収し、前記橋桁の移動を制限し、
前記長尺鋼材の一端が、前記下部構造物上に固定されている固定ブロックに取り付けられ、
前記長尺鋼材の他端が、前記下部構造物上に固定されない前記下部構造物上にある可動ブロックに取り付けられることを特徴とする移動制限装置。 In the movement restriction device that restricts the movement of the bridge girder installed on the substructure,
Provide a long steel material whose longitudinal direction is parallel to the moving direction of the bridge girder,
With the movement of the bridge girder, the long steel material extends in the longitudinal direction,
Absorb the energy that the bridge girder is moving, limit the movement of the bridge girder ,
One end of the long steel material is attached to a fixed block fixed on the lower structure,
The other end of the long steel material is attached to a movable block on the lower structure that is not fixed on the lower structure .
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