A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
SOUNDNESS EVALUATION METHOD OF BRIDGE PIER
To realize a soundness evaluation method of a bridge pier capable of precisely obtaining outstanding frequency and evaluating the soundness of the bridge pier based on the outstanding frequency.SOLUTION: A soundness evaluation device 20 of a bridge pier finds a power spectrum (L2), an integrated spectrum (L3), and a regression curve (L4) of the integrated spectrum based on an acceleration speed of a usual micro motion measured by an acceleration sensor 11 of a bridge pier monitoring device 10 installed on a bridge pier 1, obtains an outstanding frequency in a range at an intersection point between the integrated spectrum (L3) and the regression curve (L4), plots the outstanding frequency along the time axis so as to visibly display a sequential change of the outstanding frequency. In this way, if the sequential change of the outstanding frequency is visibly displayed, and if the outstanding frequency tends to decrease, such a decrease can be grasped, and therefore, it is possible to evaluate whether the soundness of the bridge pier is decreased or not based on the sequential change of the outstanding frequency.SELECTED DRAWING: Figure 1
【課題】卓越振動数を的確に取得し、その卓越振動数の変化に基づいて、橋脚の健全性について評価することができる橋脚の健全性評価方法を実現する。【解決手段】橋脚健全性評価装置２０は、橋脚１に設置された橋脚監視装置１０の加速度センサ１１によって測定された常時微動の加速度データに基づいて、パワースペクトル（Ｌ２）、累積スペクトル（Ｌ３）、累積スペクトルの回帰曲線（Ｌ４）を求め、累積スペクトル（Ｌ３）と回帰曲線（Ｌ４）との交点間の範囲にある卓越振動数を取得し、卓越振動数を時間軸に沿ってプロットして、その卓越振動数の継時的変化を視認可能に表示する。こうして卓越振動数の継時的変化を視認可能に表示すれば、卓越振動数が低下する傾向がある場合にはそれを把握することができるので、卓越振動数の継時的変化に基づいて橋脚の健全性が低下したか否か評価することができる。【選択図】図１
SOUNDNESS EVALUATION METHOD OF BRIDGE PIER
To realize a soundness evaluation method of a bridge pier capable of precisely obtaining outstanding frequency and evaluating the soundness of the bridge pier based on the outstanding frequency.SOLUTION: A soundness evaluation device 20 of a bridge pier finds a power spectrum (L2), an integrated spectrum (L3), and a regression curve (L4) of the integrated spectrum based on an acceleration speed of a usual micro motion measured by an acceleration sensor 11 of a bridge pier monitoring device 10 installed on a bridge pier 1, obtains an outstanding frequency in a range at an intersection point between the integrated spectrum (L3) and the regression curve (L4), plots the outstanding frequency along the time axis so as to visibly display a sequential change of the outstanding frequency. In this way, if the sequential change of the outstanding frequency is visibly displayed, and if the outstanding frequency tends to decrease, such a decrease can be grasped, and therefore, it is possible to evaluate whether the soundness of the bridge pier is decreased or not based on the sequential change of the outstanding frequency.SELECTED DRAWING: Figure 1
【課題】卓越振動数を的確に取得し、その卓越振動数の変化に基づいて、橋脚の健全性について評価することができる橋脚の健全性評価方法を実現する。【解決手段】橋脚健全性評価装置２０は、橋脚１に設置された橋脚監視装置１０の加速度センサ１１によって測定された常時微動の加速度データに基づいて、パワースペクトル（Ｌ２）、累積スペクトル（Ｌ３）、累積スペクトルの回帰曲線（Ｌ４）を求め、累積スペクトル（Ｌ３）と回帰曲線（Ｌ４）との交点間の範囲にある卓越振動数を取得し、卓越振動数を時間軸に沿ってプロットして、その卓越振動数の継時的変化を視認可能に表示する。こうして卓越振動数の継時的変化を視認可能に表示すれば、卓越振動数が低下する傾向がある場合にはそれを把握することができるので、卓越振動数の継時的変化に基づいて橋脚の健全性が低下したか否か評価することができる。【選択図】図１
SOUNDNESS EVALUATION METHOD OF BRIDGE PIER
橋脚の健全性評価方法
MIYAKOSHI HIROYUKI (author) / KEYAKI TAKENORI (author) / SUZUKI OSAMU (author) / SUZUKI HIROTO (author) / ABE MASAHITO (author) / SUGIZAKI KOICHI (author)
2019-01-31
Patent
Electronic Resource
Japanese
IPC:
G01M
TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES
,
Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen
/
E01D
BRIDGES
,
Brücken
/
G01H
MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
,
Messen von mechanischen Schwingungen oder Ultraschall-, Schall- oder Infraschallwellen
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