桁端の水平変位を指標とした橋梁診断

Health monitoring via horizontal displacement at the end of steel bridge girders



H. Namiki & T. Kamizono
Kyobashi Mentec Co.,Ltd., Osaka, Japan
Y. Otsuka & S. Takahashi
Keihan Electric Railway Co., Ltd., Osaka, Japan





ABSTRACT


Vertical deflection in response to a live load is often used as an integrated indicator when diagnosing the soundness of girder bridge structures. Herein, we show how vertical deflection of a girder can be cal-culated by measuring the horizontal displacement generated at the upper and lower ends of the girder. The horizontal displacement generated at a girder end can then be used as a new indicator in place of measuring vertical deflection at the span center.




Vertical deflection in response to a live load is often used as an integrated indicator when diagnosing the soundness of girder bridge structures. Herein, we show how vertical deflection of a girder can be cal-culated by measuring the horizontal displacement generated at the upper and lower ends of the girder. The horizontal displacement generated at a girder end can then be used as a new indicator in place of measuring vertical deflection at the span center.