基于FBG的平行钢丝智能斜拉索研究初探

Pilot Study About FBG-based Smart Parallel Wire Stay Cable

针对实际桥梁中使用最为广泛的一类斜拉索类型-平行钢丝索,结合其生产工艺特点,提出了一种复合FBG于索内,实现新型智能斜拉索的策略,开展了基于FBG的7股平行钢丝束的模型张拉试验,试验分析研究了粘贴于模型钢丝束表面的FBG传感器在钢丝束完好、磨损情况下张拉后的线性,重复性及灵敏性,对该智能斜拉索应用于实际桥梁工程进行了初步的可行性验证,显示了此种智能斜拉索的广阔应用前景。

Aiming at the extensively used stay cable, namely, parallel wire cable and considering its product arts, this paper gives a new strategy about fabricating smart stay cable that mixes FBG in cable. A model cable tension experiment is developed. Under intact and damage state, linearity, repetition and sensitivity of the model cable composed of 7 bundle parallel wire attached with FBG are researched. The experiment provides initial feasibility verification for the application of smart stay cable in practical bridge engineering. Also the broad application future of this new smart stay cable is displayed.