斜拉索是斜拉橋的主要承載部件。斜拉橋橋跨結(jié)構(gòu)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(shí)時(shí)監(jiān)測(cè)分布于大橋上的橋索張力變化,對(duì)于了解斜拉橋的健康狀態(tài),確保斜拉橋的安全是至關(guān)重要的。采用聚偏二氟乙烯( Polyvinylidene Fluoride) 通過監(jiān)測(cè)應(yīng)變得到拉索的振動(dòng)信號(hào),計(jì)算出拉索的張力,實(shí)現(xiàn)斜拉索張力的在線測(cè)量。
關(guān)鍵詞:聚偏二氟乙烯;斜拉橋;橋索張力;在線監(jiān)測(cè)
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