Experimental research on strain distribution measurement of PC beams based on weak grating array sensing technology

Area of Science:

• Structural Engineering
• Materials Science
• Sensor Technology

Background:

• Bridge strain and deformation are critical indicators of structural health.
• Traditional sensors provide only partial strain or localized deformation data, lacking continuous distributed measurement capabilities.
• Existing methods are insufficient for comprehensive real-time bridge structural assessment.

Purpose of the Study:

• To evaluate the efficacy of grating array strain sensing technology for distributed bridge strain measurement.
• To compare the performance of grating array sensors with traditional measurement techniques.
• To introduce a novel method for enhanced bridge health monitoring.

Main Methods:

• Installation of a grating array strain optical cable on pre-stressed concrete (PC) beams.
• Conducting loading and unloading experiments under various working conditions.
• Comparative analysis with conventional strain and deformation measurement methods.

Main Results:

• The grating array strain sensing technology successfully achieved distributed measurement of bridge strain.
• Demonstrated superior capability for continuous monitoring compared to point sensors.
• Validated the feasibility of this novel approach in experimental settings.

Conclusions:

• Grating array strain sensing provides a viable and effective solution for distributed bridge strain monitoring.
• This technology represents a significant advancement in bridge health monitoring systems.
• Offers a novel and precise approach for assessing the structural integrity of bridges.