Design and Implementation of a Structural Health Monitoring System for a Large Sea-Crossing Project with Bridges and Tunnel

Table 1

Monitoring contents and corresponding sensors.

Monitoring item	Variables	Sensors	Photos
Environmental loads	Wind speed; Wind direction	Propeller anemometer; Ultrasonic anemometers
	Temperature; Humidity	Thermometer; Hygrometer
	Earthquake; Ship collision	3D accelerometer
Structural responses	Spatial displacement	GPS
	Overall displacement of main beam	Displacement sensor
	Strain	FBG strain sensor
	Cable force	Cable tension sensor
	Vibration characteristics	2D accelerometer
Corrosion	Corrosion process	Corrosion sensor