Monitoring Bridge Dynamic Responses Using Fiber Bragg Grating Tiltmeters

Monitoring Bridge Dynamic Responses Using Fiber Bragg Grating Tiltmeters

In bridge health monitoring, tiltmeters have been used for measuring rotation and curvature; however, their application in dynamic parameter identification has been lacking. This study installed fiber Bragg grating (FBG) tiltmeters on the bearings of a bridge and monitored the dynamic rotational angle. The dynamic features, including natural frequencies and mode shapes, have been identified suc...

Establishment the Bridge Scour Safety Monitoring System by Using Fiber Bragg Grating Sensors

Taiwan is located in the rim of the Pacific Ocean. The activities of the earthquake happen frequently, which threaten the safety of the bridge in the Taiwan Island. Besides, the severe floods resulted from the typhoon or storm events can cause great damages due to the bridge scouring. The steep-sloped rivers and sand mining problems in Taiwan accelerate the degradation of the riverbed. Scouring...

Post-Impact Fatigue Damage Monitoring Using Fiber Bragg Grating Sensors

It has been shown that impact damage to composite materials can be revealed by embedded Fiber Bragg Gratings (FBG) as a broadening and splitting of the latter's characteristic narrow peak reflected spectrum. The current work further subjected the impact damaged composite to cyclic loading and found that the FBG spectrum gradually submerged into a rise of background intensity as internal damages...

Dynamic Strain Measurement Using Improved Bonding Fiber Bragg Grating

This study proposes an improved bonding method for attaching a fiber Bragg grating (FBG) on surface of a structure to measure its dynamic strains. The improved bonding fiber Bragg grating is called IBFBG for short in this study. The bonding method provides the chance to let the IBFBG and resistance strain gauge measure the longitudinal strain at the same point. This study use two steel cantilev...

Infrared Radiation Detection Using Fiber Bragg Grating