光纤光栅智能复合筋传感特性及其工程应用

Sensing properties study and engineering applications for GFRP-OFBG intelligent sensors

提出一种新型的玻璃纤维光纤光栅(GFRP-OFBG)智能复合筋传感器监测桥梁拉索应力。通过标定试验,得到GFRP-OFBG传感器的应力和温度传感特性。比较了不同直径的GFRP-OFBG传感器极限应变,得出直径为7 mm的GFRP-OFBG传感器适合桥梁拉索应力监测,其极限应变能达到8 000μs。最后,对GFRP-OF-BG传感器在拱桥系杆的布设工艺进行了探索,并在四川峨边大渡河拱桥系杆施工中得到了具体实施和应用,成功地监测了系杆的整个张拉过程。基于1年的监测数据,检验了系杆张拉效果及其判断了目前的运营状况。

In order to monitor the bridge cable tension,a new intelligent GFRP-OFBG sensor is introduced.The temperature and strain sensing properties of GFRP-OFBG sensor are studied through the calibration experiment.The limit strain of GFRP-OFBG sensrs with different diameters is compared.It is verified that the GFRP-OFBG sensors with diameter of 7 mm are suitable for the application of the bridge cables tension monitoring,and its limit strain is about 8000.Finally,the installation of GFRP-OFBG sensors have been exp...