【摘要】 以呼兰河大桥为例,介绍了光纤布拉格光栅传感技术对预应力箱梁在预应力张拉过程中混凝土结构内部变化情况进行检测的方法。光纤布拉格光栅能够监测混凝土内部应变状态,发挥出成活率高、寿命长等优势,为建立基于光纤传感器的结构健康监测系统奠定了基础。更多还原

【Abstract】 Fiber Bragg grating (FBG) sensors were embedded into the pre-stressed concrete beam of Hulan river bridge. Internal strains of the concrete beam were determined during the stressing process. FBG sensors show the advantages of strong surviving capability and long service life over conventional electrical strain gauge in experiments. The results indicate that FBG sensors have the potentials to forge a flexible framework for the monitoring system.更多还原