A Concise Review of State-of-the-Art Sensing Technologies for Bridge Structural Health Monitoring.

Area of Science:

• Civil Engineering
• Materials Science
• Electrical Engineering

Background:

• Growing need for enhanced safety and longevity in bridge infrastructure.
• Existing structural health monitoring (SHM) systems require continuous advancement.

Purpose of the Study:

• To synthesize recent advances in SHM sensing systems for bridges.
• To provide a comprehensive overview of emerging sensor technologies and their applications.

Main Methods:

• Literature review of carbon nanotube (CNT), piezoelectric, RFID, wireless, fiber optic, and computer-vision-based sensing systems.
• Exploration of working principles, documented deployments, and future research directions for each technology.
• Comparative analysis of sensor strengths for optimal selection.

Main Results:

• Detailed explanation of CNT, piezoelectric, RFID, wireless, fiber optic, and computer-vision sensing principles and applications.
• Identification of complementary strengths among different sensing technologies.
• Highlighting the potential for integrated SHM systems.

Conclusions:

• These advanced sensing technologies significantly enhance SHM reliability for bridges.
• Synergistic integration with robotics and novel materials will drive future resilient monitoring frameworks.
• Informed sensor suite selection is crucial for specific bridge conditions.