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A platform for research: civil engineering, architecture and urbanism
VIBRATION CONTROL BRIDGE PIER STRUCTURE
PROBLEM TO BE SOLVED: To provide a vibration control bridge pier structure capable of improving a restoration property, reducing earthquake responses, reducing residual deformations and improving workability or the like by basically evading formation of a plastic hinge at column upper and lower end parts and capable of efficiently absorbing energy by the entire frame by disposing a brace to the column upper and lower end parts as well, in a vibration control bridge pier of an RC rigid frame structure.SOLUTION: Strength is increased by using a precast form of UFC (Ultra-strength Fiber-reinforced Concrete) or the like at the upper and lower end parts of a column 3 of an RC frame 5 to prevent the formation of plastic hinges H at the total of four parts at the column upper and lower end parts by an earthquake motion (level 2 earthquake motion) at or higher than an assumed level. A brace 6 having a damper function for connecting a pair of left and right columns 3 is disposed at the column upper and lower end parts as well, one end of the braces 6 at the upper and lower end parts of the column 3 is respectively joined to haunches respectively formed at the upper and lower ends of the column 3 or joined to a lower surface of a beam 4 and an upper surface of a footing 2.
【課題】ＲＣラーメン構造の制震橋脚において、基本的に柱上下端部の塑性ヒンジの形成を回避することで、復旧性の向上、地震応答の低減、残留変形の減少、施工性の向上等を図れ、また柱上下端部にもブレースを配設することで、フレーム架構全体で効率的なエネルギー吸収が可能となる制震橋脚構造を提供する。【解決手段】ＲＣフレーム架構５の柱３の上下端部にＵＦＣ（超高強度繊維補強コンクリート）などのプレキャスト型枠を用いるなどして高強度化を図り、想定以上の地震動（レベル２地震動）で柱上下端部における合計４箇所に塑性ヒンジＨが形成されないようにし、この柱上下端部にも、左右一対の柱３を連結するダンパー機能を備えたブレース６を配置し、この柱３の上下端部のブレース６の一端をそれぞれ、柱３の上下端にそれぞれ形成したハンチに接合し、あるいは梁４の下面とフーチング２の上面に接合する。【選択図】図１
VIBRATION CONTROL BRIDGE PIER STRUCTURE
PROBLEM TO BE SOLVED: To provide a vibration control bridge pier structure capable of improving a restoration property, reducing earthquake responses, reducing residual deformations and improving workability or the like by basically evading formation of a plastic hinge at column upper and lower end parts and capable of efficiently absorbing energy by the entire frame by disposing a brace to the column upper and lower end parts as well, in a vibration control bridge pier of an RC rigid frame structure.SOLUTION: Strength is increased by using a precast form of UFC (Ultra-strength Fiber-reinforced Concrete) or the like at the upper and lower end parts of a column 3 of an RC frame 5 to prevent the formation of plastic hinges H at the total of four parts at the column upper and lower end parts by an earthquake motion (level 2 earthquake motion) at or higher than an assumed level. A brace 6 having a damper function for connecting a pair of left and right columns 3 is disposed at the column upper and lower end parts as well, one end of the braces 6 at the upper and lower end parts of the column 3 is respectively joined to haunches respectively formed at the upper and lower ends of the column 3 or joined to a lower surface of a beam 4 and an upper surface of a footing 2.
【課題】ＲＣラーメン構造の制震橋脚において、基本的に柱上下端部の塑性ヒンジの形成を回避することで、復旧性の向上、地震応答の低減、残留変形の減少、施工性の向上等を図れ、また柱上下端部にもブレースを配設することで、フレーム架構全体で効率的なエネルギー吸収が可能となる制震橋脚構造を提供する。【解決手段】ＲＣフレーム架構５の柱３の上下端部にＵＦＣ（超高強度繊維補強コンクリート）などのプレキャスト型枠を用いるなどして高強度化を図り、想定以上の地震動（レベル２地震動）で柱上下端部における合計４箇所に塑性ヒンジＨが形成されないようにし、この柱上下端部にも、左右一対の柱３を連結するダンパー機能を備えたブレース６を配置し、この柱３の上下端部のブレース６の一端をそれぞれ、柱３の上下端にそれぞれ形成したハンチに接合し、あるいは梁４の下面とフーチング２の上面に接合する。【選択図】図１
VIBRATION CONTROL BRIDGE PIER STRUCTURE
制震橋脚構造
YAMANOBE SHINICHI (author) / SOGABE NAOKI (author) / NAGUMO HIROYUKI (author) / MATSUKI SATOSHI (author)
2015-07-02
Patent
Electronic Resource
Japanese
IPC:
E01D
BRIDGES
,
Brücken
Phononic crystal type bridge pier vibration reduction structure
| European Patent Office | 2024