Applications of Integrated Sensors in Structural Monitoring of Bridges and Viaducts

Applications of Integrated Sensors in Structural Monitoring of Bridges and Viaducts

Structural monitoring has become a cornerstone in the management and maintenance of critical infrastructures such as bridges and viaducts. By integrating advanced sensor technologies, engineers can collect real-time data, identify potential risks, and ensure structural integrity. Among the most utilized devices are fiber optic sensors, LVDT sensors, and piezoelectric accelerometers, each serving unique roles in structural health monitoring.

Fiber Optic Sensors for Monitoring Deformations and Vibrations

Fiber optic sensors are highly effective in measuring deformations and vibrations in large-scale structures like bridges. These sensors utilize light signals to detect minute changes in strain or stress, providing precise data even under challenging environmental conditions.

Application Example: On a suspension bridge in Genoa, fiber optic sensors were embedded within the cables and deck to monitor stress variations caused by heavy traffic and temperature changes. The collected data allowed engineers to adjust maintenance schedules and implement reinforcements in critical areas before issues escalated.

LVDT Sensors in Expansion Joints for Measuring Displacements

Linear Variable Differential Transformers (LVDTs) are commonly used to measure displacements in expansion joints, which are crucial for accommodating thermal movements in bridges and viaducts. These sensors provide accurate measurements of joint openings and closings, ensuring that the structure adapts safely to environmental changes.

Application Example: On a highway viaduct in northern Italy, LVDT sensors were installed in expansion joints to track displacements caused by seasonal temperature variations. This continuous monitoring helped prevent excessive wear and tear, extending the lifespan of the joints and minimizing maintenance costs.

Piezoelectric Accelerometers for Detecting High-Frequency Vibrations

Piezoelectric accelerometers are ideal for detecting high-frequency vibrations, often associated with dynamic loads such as vehicular traffic or seismic activity. These sensors provide critical insights into the dynamic behavior of structures, enabling early detection of potential failures.

Application Example: On a railway bridge in Switzerland, piezoelectric accelerometers were deployed to monitor vibrations induced by passing trains. The data revealed patterns of wear in certain structural elements, prompting timely repairs that ensured safety and operational continuity.

Gemini Smart: The Solution for Integrated Data Management

The Gemini Smart platform excels as a comprehensive solution for managing structural monitoring data in bridges and viaducts. Its cloud-based architecture enables seamless integration of data from fiber optic sensors, LVDT sensors, and piezoelectric accelerometers, offering a holistic view of structural conditions. Designed for infrastructure managers and engineers, Gemini Smart automates data analysis and generates alerts in the presence of anomalies, improving safety and optimizing maintenance strategies.

With cutting-edge solutions like Gemini Smart, the future of structural monitoring is geared towards proactive maintenance, enhanced safety, and efficient management of vital infrastructures.