JP2000017611A - Mass damper - Google Patents

Mass damper

Info

Publication number
JP2000017611A
JP2000017611A JP10188488A JP18848898A JP2000017611A JP 2000017611 A JP2000017611 A JP 2000017611A JP 10188488 A JP10188488 A JP 10188488A JP 18848898 A JP18848898 A JP 18848898A JP 2000017611 A JP2000017611 A JP 2000017611A
Authority
JP
Japan
Prior art keywords
container
viscous
steel pipe
mass damper
tower
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP10188488A
Other languages
Japanese (ja)
Inventor
Tadao Koide
Toshitami Son
利民 孫
忠男 小出
Original Assignee
Ohbayashi Corp
株式会社大林組
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ohbayashi Corp, 株式会社大林組 filed Critical Ohbayashi Corp
Priority to JP10188488A priority Critical patent/JP2000017611A/en
Publication of JP2000017611A publication Critical patent/JP2000017611A/en
Withdrawn legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To prevent a precedently erected steel pipe from swinging in the construction of a high bridge pier made of steel pipes. SOLUTION: A mass damper 11 is constituted of support members 12a, 12b laid crosswise on the top of a hollow steel pipe 1 forming a tower structure, a building material-container 14 suspended like a pendulum from the support members through a chainblock 13 as a length-adjustable hanging means, a cylindrical viscous material-container 15 fixed to the inside face of the building material-container by welding or the like, and perforated bodies 17 connected to the support members 12a, 12b through rods 18 as connecting members, and inserted in a viscous material 16 filled in the viscous material-container.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【0001】[0001]
【発明の属する技術分野】本発明は、主として施工中の
高橋脚を制振する際に用いられるマスダンパに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mass damper mainly used for damping a high pier under construction.
【0002】[0002]
【従来の技術】地震や風といった外力を受けたときに構
造物に生じる揺れを抑制する制振技術としては、能動的
制御によるアクティブ系、受動的なパッシブ系及びそれ
らの複合型に概ね大別されるが、それらのうち、パッシ
ブ系に属するものとして、同調質量ダンパ(TMD)や
ダイナミックダンパとも称されるマスダンパがある。
2. Description of the Related Art Vibration suppression techniques for suppressing a sway generated in a structure when subjected to an external force such as an earthquake or wind are roughly classified into an active system by active control, a passive passive system, and a composite type thereof. Among them, a mass damper also called a tuned mass damper (TMD) or a dynamic damper belongs to the passive system.
【0003】マスダンパは、構造物に錘(マス)を設置
し、その錘の周期を構造物に同調させることによって錘
を構造物の揺れに共振させ、構造物の振動低減を図るも
のである。
The mass damper has a structure in which a weight (mass) is installed on a structure, and the period of the weight is tuned to the structure so that the weight resonates with the vibration of the structure, thereby reducing the vibration of the structure.
【0004】一方、図4に示すように、鋼管1を先行立
設し、しかる後に鋼管1の周囲にコンクリート2を打設
することによって高橋脚3を施工する工法が存在する。
かかる施工方法を採用するにあたり、鋼管1が地震、風
等によって大きく揺れる場合には、型枠設置やコンクリ
ート打設に支障が出ないよう、該鋼管の揺れを抑制しな
ければならない。
On the other hand, as shown in FIG. 4, there is a construction method in which a steel pipe 1 is erected in advance, and then concrete 2 is poured around the steel pipe 1 to construct a high pier 3.
When adopting such a construction method, when the steel pipe 1 is greatly shaken by an earthquake, wind, or the like, the swing of the steel pipe must be suppressed so as not to hinder the installation of the formwork or the concrete placement.
【0005】[0005]
【発明が解決しようとする課題】しかしながら、鋼管1
のみが立設されている段階では、固有周期がかなり長く
なり、これをマスダンパで制振しようとすると、通常の
機械的なマスダンパでは小型化が難しくまた製作コスト
も高くなるという問題を生じていた。
However, the steel pipe 1
At the stage where only the erection is established, the natural period becomes considerably long, and if this is to be damped with a mass damper, there has been a problem that it is difficult to reduce the size with a normal mechanical mass damper and the manufacturing cost increases. .
【0006】本発明は、上述した事情を考慮してなされ
たもので、鋼管を用いた高橋脚の施工において先行立設
された鋼管の揺れを抑制可能なマスダンパを提供するこ
とを目的とする。
SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-described circumstances, and has as its object to provide a mass damper capable of suppressing a swing of a steel pipe erected earlier in the construction of a high pier using a steel pipe.
【0007】[0007]
【課題を解決するための手段】上記目的を達成するた
め、本発明に係るマスダンパは請求項1に記載したよう
に、塔状構造物の頂部近傍に取り付けられた支持部材
と、該支持部材から長さ調整自在な吊持手段を介して振
り子状に吊持された資材収容体と、該資材収容体に取り
付けられた粘性材容器と、該粘性材容器内に満たされた
粘性材に挿入され所定の連結部材を介して前記塔状構造
物若しくは前記支持部材に連結された有孔体とから構成
したものである。
In order to achieve the above object, a mass damper according to the present invention comprises, as described in claim 1, a support member attached near the top of a tower-like structure; A material container suspended in a pendulum via a length adjustable suspension means, a viscous material container attached to the material container, and a viscous material filled in the viscous material container. It is constituted by a perforated body connected to the tower-like structure or the support member via a predetermined connecting member.
【0008】また、本発明に係るマスダンパは、前記塔
状構造物を中空鋼管とし、該中空鋼管内で前記資材収容
体を吊持するようにしたものである。
In the mass damper according to the present invention, the tower-like structure is a hollow steel pipe, and the material container is suspended in the hollow steel pipe.
【0009】本発明に係るマスダンパにおいては、振り
子状に吊持された資材収容体の固有周期を、吊持手段の
長さを調整することによって塔状構造物の固有周期に同
調させる。
In the mass damper according to the present invention, the natural period of the material container suspended in a pendulum is adjusted to the natural period of the tower-like structure by adjusting the length of the suspension means.
【0010】このようにすると、資材収容体がマスダン
パの錘の役目を果たすとともに、粘性材容器内に満たさ
れた粘性材と該粘性材に挿入された有孔体とが減衰装置
の役目を果たし、塔状構造物の揺れが抑制される。な
お、資材収容体は、塔状構造物の頂部近傍から吊持され
るので、塔状構造物の固有周期が長くなっても、それに
応じた吊持長さを十分確保することができる。
With this configuration, the material container functions as a weight of the mass damper, and the viscous material filled in the viscous material container and the perforated body inserted into the viscous material function as a damping device. In addition, the swing of the tower-like structure is suppressed. Since the material container is hung from the vicinity of the top of the tower-like structure, even if the natural period of the tower-like structure becomes long, a sufficient hanging length corresponding thereto can be secured.
【0011】塔状構造物には、高橋脚、特に施工途中で
中空鋼管が先行立設された状態の高橋脚、煙突等が含ま
れる。吊持手段は、振り子長さを調整できるものであれ
ばその構成は任意であり、例えばチェーンブロックで構
成することが可能である。
The tower-like structure includes a tall pier, particularly a tall pier, a chimney, and the like in which a hollow steel pipe is erected in advance during construction. The structure of the suspending means is arbitrary as long as the pendulum length can be adjusted. For example, the hanging means can be constituted by a chain block.
【0012】資材収容体に投入される資材には、土砂を
はじめ、コンクリートや鋼材といった施工現場で調達可
能なものが該当する。
The materials put into the material container include materials that can be procured at the construction site, such as earth and sand, concrete and steel.
【0013】粘性材容器は、資材収容体と一緒に揺れ動
くのであれば、どこに取り付けてもかまわない。
The viscous material container may be mounted anywhere as long as it swings with the material container.
【0014】本発明で言うところの有孔体とは、粘性材
が通過することによって粘性抵抗が発生する孔を有する
部材という意味であり、かかる作用を奏する限り、その
構成は問わない。
The porous body in the present invention means a member having a hole in which viscous resistance is generated by the passage of a viscous material, and the configuration thereof is not limited as long as it has such an effect.
【0015】粘性材としては、粘性体ダンパに使用され
ている材料、例えば高粘度オイルあるいはシリコンを使
用することができる。
As the viscous material, a material used for a viscous material damper, for example, high-viscosity oil or silicon can be used.
【0016】資材収容体は、塔状構造物の頂部近傍であ
ればどこに吊持するようにしてもかまわない。例えば、
塔状構造物の外周面にブラケット状の支持部材を取り付
け該支持部材の先端にて吊持する、隣接する2つの塔状
構造物間に支持部材を架け渡し、該支持部材の中央近傍
にて吊持するなどの構成が考えられる。ここで、前記塔
状構造物を中空鋼管とし、該中空鋼管内で前記資材収容
体を吊持するようにしたならば、中空鋼管内が資材収容
体の吊持スペースとして有効利用されることとなり、資
材収容体が塔状構造物の施工に支障となる懸念がなくな
る。
The material container may be suspended anywhere near the top of the tower-like structure. For example,
Attach a bracket-like support member to the outer peripheral surface of the tower-like structure, suspend the support member at the tip of the support member, bridge the support member between two adjacent tower-like structures, and near the center of the support member. A configuration such as hanging is conceivable. Here, if the tower-like structure is a hollow steel pipe and the material container is suspended in the hollow steel pipe, the hollow steel pipe is effectively used as a space for suspending the material container. In addition, there is no concern that the material container hinders the construction of the tower-shaped structure.
【0017】[0017]
【発明の実施の形態】以下、本発明に係るマスダンパの
実施の形態について、添付図面を参照して説明する。な
お、従来技術と実質的に同一の部品等については同一の
符号を付してその説明を省略する。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the mass damper according to the present invention will be described below with reference to the accompanying drawings. It is to be noted that the same reference numerals are given to components and the like that are substantially the same as those in the conventional technology, and description thereof will be omitted.
【0018】図1は、本実施形態に係るマスダンパ11
を示した鉛直断面図、図2(a)は、図1のA―A線に沿
う断面図である。これらの図でわかるように、本実施形
態に係るマスダンパ11は、塔状構造物である中空鋼管
1の頂部に十字状に架け渡された支持部材12a、12
bと、該支持部材から長さ調整自在な吊持手段であるチ
ェーンブロック13を介して振り子状に吊持された資材
収容体14と、該資材収容体の内面に溶接等で固定され
た円筒状の粘性材容器15と、該粘性材容器内に満たさ
れた粘性材16に挿入され連結部材であるロッド18を
介して支持部材12a、12bに連結された有孔体17
とから構成してある。
FIG. 1 shows a mass damper 11 according to this embodiment.
FIG. 2A is a sectional view taken along line AA in FIG. As can be seen from these figures, the mass damper 11 according to the present embodiment includes support members 12a, 12a, which are bridged in a cross shape on the top of the hollow steel pipe 1, which is a tower-like structure.
b, a material container 14 suspended in a pendulum shape from the support member via a chain block 13 as a hanging means whose length can be adjusted, and a cylinder fixed to the inner surface of the material container by welding or the like Viscous material container 15 and perforated body 17 inserted into viscous material 16 filled in the viscous material container and connected to supporting members 12a, 12b via rod 18 as a connecting member.
It consists of:
【0019】ここで、資材収容体14は、例えば高橋脚
3の施工現場で採取された土砂19が投入された状態で
中空鋼管1内に吊持してある。土砂19の量は、該土砂
を含めた資材収容体14の全体重量が制振対象となる中
空鋼管全体の重量の例えば1%程度に設定しておくのが
よい。なお、資材収容体14は、コンクリート搬送用の
バケットなどを転用することもできる。
Here, the material container 14 is suspended in the hollow steel pipe 1 in a state where, for example, earth and sand 19 collected at the construction site of the high pier 3 is charged. The amount of the soil 19 is preferably set so that the total weight of the material container 14 including the soil is, for example, about 1% of the weight of the entire hollow steel pipe to be damped. Note that the material container 14 can be diverted to a bucket for transporting concrete.
【0020】粘性材16は、粘性体ダンパに使用されて
いる材料、例えば高粘度オイルあるいはシリコンなどを
使用することができる。
As the viscous material 16, a material used for a viscous material damper, for example, high-viscosity oil or silicon can be used.
【0021】有孔体17は、図2(b)でよくわかるよう
に孔20が多数形成された円筒状有孔管で構成してあ
る。かかる有孔体17は、ロッド18を介して支持部材
12a、12bに連結されているため、資材収容体14
の揺れに伴って粘性材容器15が揺れ動くと、該粘性材
容器との間に相対変位が生じ、粘性材容器15内に満た
された粘性材16が同図矢印に示すように孔20を通過
して所定の粘性減衰を発揮するようになっている。
As shown in FIG. 2 (b), the perforated body 17 is formed of a cylindrical perforated tube having a large number of holes 20 formed therein. Since the perforated body 17 is connected to the support members 12a and 12b via the rod 18, the material container 14
When the viscous material container 15 oscillates due to the vibration, relative displacement occurs between the viscous material container and the viscous material container, and the viscous material 16 filled in the viscous material container 15 passes through the hole 20 as shown by the arrow in FIG. Thus, a predetermined viscous damping is exerted.
【0022】本実施形態に係るマスダンパ11において
は、振り子状に吊持された資材収容体14の固有周期
を、チェーンブロック13で吊下げ長さを調整すること
によって制振対象となる中空鋼管1の固有周期に同調さ
せる。
In the mass damper 11 according to the present embodiment, the natural period of the material container 14 suspended in a pendulum shape is adjusted by adjusting the length of the suspension by the chain block 13 so that the hollow steel pipe 1 to be damped can be controlled. Tuning to the natural period of
【0023】このようにすると、資材収容体14がマス
ダンパ11の錘の役目を果たすとともに、粘性材容器1
5内に満たされた粘性材16と該粘性材に挿入された有
孔体17とが減衰装置の役目を果たし、かくして中空鋼
管1の揺れが抑制される。
In this way, the material container 14 functions as the weight of the mass damper 11 and the viscous material container 1
The viscous material 16 filled in 5 and the perforated body 17 inserted in the viscous material serve as a damping device, and thus the swing of the hollow steel pipe 1 is suppressed.
【0024】なお、かかる減衰装置による減衰値がマス
ダンパ11の最適減衰値となるように、孔20の数量や
有孔体17の粘性材16への挿入深さあるいは粘性材容
器15や有孔体17の個数などを適宜調整するのがよ
い。ちなみに有孔体17の粘性材16への挿入深さを調
整するには、図1でよくわかるようにロッド18を支持
部材12a、12bに固定しているクランプ21をいっ
たん緩めてロッド18を上下させ、しかる後に適当な高
さ位置にてクランプ21で再度支持部材12a、12b
に固定するようにすればよい。
The number of holes 20 and the insertion depth of the perforated body 17 into the viscous material 16 or the viscous material container 15 and the perforated material are set so that the damping value of the damping device becomes the optimum damping value of the mass damper 11. It is preferable to appropriately adjust the number of 17 and the like. Incidentally, in order to adjust the insertion depth of the perforated body 17 into the viscous material 16, as shown in FIG. 1, the clamp 21 fixing the rod 18 to the supporting members 12a and 12b is once loosened and the rod 18 is moved up and down. After that, the support members 12a and 12b are again
It may be fixed to
【0025】以上説明したように、本実施形態に係るマ
スダンパ11によれば、資材収容体14がマスダンパ1
1の錘の役目を果たすとともに、粘性材容器15内に満
たされた粘性材16と該粘性材に挿入された有孔体17
とが減衰装置の役目を果たすので、中空鋼管1の揺れを
抑制することが可能となる。そして、資材収容体14
は、中空鋼管1の頂部近傍から吊持されるので、該鋼管
の固有周期が長くなっても、それに応じた吊持長さを十
分確保することができるとともに、資材収容体14内に
入れる資材は、土砂をはじめとしてコンクリート、鋼材
など施工現場において容易に調達することができるの
で、製作に時間を要しないとともに製作コストについて
もきわめて安価に抑えることができる。また、撤去も容
易に行えるほか、土砂を資材とした場合にはその処分に
困ることもない。
As described above, according to the mass damper 11 of the present embodiment, the material container 14 is
The viscous material 16 filled in the viscous material container 15 and the perforated body 17
Plays the role of a damping device, so that the swinging of the hollow steel pipe 1 can be suppressed. And the material container 14
Is suspended from the vicinity of the top of the hollow steel pipe 1, so that even if the natural cycle of the steel pipe becomes long, it is possible to ensure a sufficient suspension length corresponding to the natural cycle, and to put the material into the material container 14. Can be easily procured at the construction site, such as earth and sand, concrete, steel materials, etc., so that no time is required for production and the production cost can be extremely low. In addition, it can be easily removed, and when earth and sand is used as material, there is no problem in disposing of it.
【0026】また、本実施形態に係るマスダンパ11に
よれば、中空鋼管1内で資材収容体14を吊持するよう
にしたので、中空鋼管1内が資材収容体14の吊持スペ
ースとして有効利用されることとなり、資材収容体14
が中空鋼管1ひいては高橋脚3の施工に支障となる懸念
がなくなる。
Further, according to the mass damper 11 according to the present embodiment, the material container 14 is suspended in the hollow steel tube 1, so that the hollow steel tube 1 is effectively used as a space for suspending the material container 14. And the material container 14
However, there is no concern that the construction of the hollow steel pipe 1 and thus the high pier 3 will be hindered.
【0027】本実施形態では、資材収容体14を中空鋼
管1内で吊持するようにしたが、必ずしも鋼管内で吊持
する必要はなく、鋼管の外周面にブラケットを取付け、
該ブラケットの先端から資材収容体14を吊持するよう
にしてもよいし、図3に示すように、隣り合って立設さ
れた2本の中空鋼管1a、1bの間に支持部材12bを
架け渡し、該支持部材で資材収容体14を吊持するよう
にしてもよい。
In this embodiment, the material container 14 is suspended in the hollow steel pipe 1. However, it is not always necessary to suspend the material container 14 in the steel pipe. A bracket is attached to the outer peripheral surface of the steel pipe.
The material container 14 may be hung from the tip of the bracket, or as shown in FIG. 3, a support member 12b may be hung between two adjacent hollow steel pipes 1a and 1b. The material container 14 may be suspended by the support member.
【0028】[0028]
【発明の効果】以上述べたように、請求項1に係る本発
明のマスダンパによれば、資材収容体が塔状構造物の頂
部近傍から吊持されるため、該塔状構造物の固有周期が
長くなっても、それに応じた吊持長さを十分確保するこ
とができる。また、資材収容体内に入れる資材を、土砂
をはじめとしてコンクリート、鋼材など施工現場にある
ものから適宜選択して容易に調達することができるの
で、製作に時間を要しないとともに製作コストについて
もきわめて安価に抑えることができる。また、撤去も容
易に行えるほか、土砂を資材とした場合にはその処分に
困ることもない。
As described above, according to the mass damper of the first aspect of the present invention, since the material container is suspended from near the top of the tower-like structure, the natural period of the tower-like structure is reduced. , It is possible to ensure a sufficient hanging length. In addition, the material to be put into the material container can be easily selected from materials at the construction site, such as earth and sand, concrete, steel, etc., so that it can be easily procured. Can be suppressed. In addition, it can be easily removed, and when earth and sand is used as material, there is no problem in disposing of it.
【0029】また、請求項2に係る本発明のマスダンパ
によれば、中空鋼管内が資材収容体の吊持スペースとし
て有効利用されるという効果も奏する。
According to the mass damper of the second aspect of the present invention, there is also an effect that the inside of the hollow steel pipe is effectively used as a hanging space for the material container.
【0030】[0030]
【図面の簡単な説明】[Brief description of the drawings]
【図1】本実施形態に係るマスダンパの鉛直断面図。FIG. 1 is a vertical sectional view of a mass damper according to an embodiment.
【図2】同じく本実施形態に係るマスダンパの図であ
り、(a)は図1のA―A線に沿う水平断面図、(b)は粘性
材容器周辺の詳細断面図。
FIGS. 2A and 2B are diagrams of a mass damper according to the embodiment, in which FIG. 2A is a horizontal sectional view taken along line AA in FIG. 1, and FIG. 2B is a detailed sectional view around a viscous material container.
【図3】本実施形態に係るマスダンパの別の使用状況を
示した鉛直断面図。
FIG. 3 is a vertical sectional view showing another use state of the mass damper according to the embodiment.
【図4】中空鋼管を先行立設し次いで該鋼管の周りにコ
ンクリートを打設する工法で高橋脚を施工している様子
を示した図であり、(a)は全体側面図、(b)はB―B線に
沿う水平断面図。
FIG. 4 is a view showing a state in which a high pier is being constructed by a method in which a hollow steel pipe is first erected and then concrete is cast around the steel pipe, (a) is an overall side view, (b) Is a horizontal sectional view along the line BB.
【符号の説明】[Explanation of symbols]
1 中空鋼管(塔状構造物) 3 高橋脚(塔状構造物) 11 マスダンパ 12a、12b 支持部材 13 チェーンブロック(吊持
手段) 14 資材収容体 15 粘性材容器 16 粘性材 17 有孔体 19 土砂(資材)
DESCRIPTION OF SYMBOLS 1 Hollow steel pipe (tower-like structure) 3 High pier (tower-like structure) 11 Mass damper 12a, 12b Support member 13 Chain block (suspension means) 14 Material container 15 Viscous material container 16 Viscous material 17 Perforated body 19 Earth and sand (Materials)

Claims (2)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 塔状構造物の頂部近傍に取り付けられた
    支持部材と、該支持部材から長さ調整自在な吊持手段を
    介して振り子状に吊持された資材収容体と、該資材収容
    体に取り付けられた粘性材容器と、該粘性材容器内に満
    たされた粘性材に挿入され所定の連結部材を介して前記
    塔状構造物若しくは前記支持部材に連結された有孔体と
    から構成したことを特徴とするマスダンパ。
    1. A support member attached near the top of a tower-like structure, a material container suspended from the support member in a pendulum-like manner via a length-adjustable hanging means, and a material container. A viscous material container attached to the body, and a perforated body inserted into the viscous material filled in the viscous material container and connected to the tower-like structure or the support member via a predetermined connecting member. Mass damper characterized by doing.
  2. 【請求項2】 前記塔状構造物を中空鋼管とし、該中空
    鋼管内で前記資材収容体を吊持するようにした請求項1
    記載のマスダンパ。
    2. The hollow steel pipe is used as the tower-like structure, and the material container is suspended in the hollow steel pipe.
    The mass damper described.
JP10188488A 1998-07-03 1998-07-03 Mass damper Withdrawn JP2000017611A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10188488A JP2000017611A (en) 1998-07-03 1998-07-03 Mass damper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10188488A JP2000017611A (en) 1998-07-03 1998-07-03 Mass damper

Publications (1)

Publication Number Publication Date
JP2000017611A true JP2000017611A (en) 2000-01-18

Family

ID=16224617

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10188488A Withdrawn JP2000017611A (en) 1998-07-03 1998-07-03 Mass damper

Country Status (1)

Country Link
JP (1) JP2000017611A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009113277A1 (en) * 2008-03-10 2009-09-17 株式会社Ihi Vibration control device installation method for existing structures and vibration control device used in said method
KR100993865B1 (en) 2009-09-08 2010-11-11 (주)대우건설 Cable-stayed bridge theerection method for using vibration damping device
CN109505240A (en) * 2018-12-06 2019-03-22 江苏中源工程管理股份有限公司 A kind of guardrail mounting structure between abutment and road

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009113277A1 (en) * 2008-03-10 2009-09-17 株式会社Ihi Vibration control device installation method for existing structures and vibration control device used in said method
KR100993865B1 (en) 2009-09-08 2010-11-11 (주)대우건설 Cable-stayed bridge theerection method for using vibration damping device
CN109505240A (en) * 2018-12-06 2019-03-22 江苏中源工程管理股份有限公司 A kind of guardrail mounting structure between abutment and road
CN109505240B (en) * 2018-12-06 2020-11-20 江苏中源工程管理股份有限公司 Guardrail mounting structure between abutment and road

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