維持管理(測定)

[I-338] Confirming method for Cable soundness

〇Hisashi Watase¹, Morihiro Kato¹, Kenta Hakamata¹, Kazuhiro Sugimoto¹, Seya Kishimoto¹ (1.Central Japan Railway Company)

Keywords:Nielsen Lohse Bridge, Laser Doppler Vibrometer, Natural frequency

Cable inspection of arch bridges has been carried out visually untill now.

However, the way of inspections has two problems.
It is hard to find the deformation because this arch is about 23 meters tall, and to check the internal condition due to the surface coating.

This stady reports whether we can grasp the cable soundness or not by certain method : confirming that there is no change in the frequency.