斜拉索是斜拉橋的主要承載部件。斜拉橋橋跨結構的重量和橋上活載絕大部分或全部
通過斜拉索傳遞到索塔上。實時監測分布于大橋上的橋索張力變化,對于了解斜拉橋的健康狀態,確保斜拉橋的安全是至關重要的。采用聚偏二氟乙烯( Polyvinylidene Fluoride) 通過監測應變得到拉索的振動信號,計算出拉索的張力,實現斜拉索張力的在線測量。
關鍵詞:聚偏二氟乙烯;斜拉橋;橋索張力;在線監測
Abstract :The stayed cable of cable - stayed bridges is the main load - bearing components. Most of the load is trans2 fer to the tower of the bridge. Through monitoring the cable tension and its variation ,the overall technical condition to a cable - stayed bridge can be estimated and assure the safety of the bridge. Polyvinylidene fluoride is applied as sensor to
monitoring the vibration of stayed cables ,and the tension of stayed - cable can be calculated to realized the on line measure2 ment of cable - stayed bridges.
Key Words :Polyvinylidene Fluoride ;Cable - stayed Bridge ; Tension of Cable ;On Line Measurement