Abstract
Aimed at the health monitoring and evaluation of bridges based on sensing technology, the monitoring contents of different structural types of long-span bridges were defined. Then, the definition, classification, selection principle, and installation requirements of the sensors were summarized. The concept was proposed that new adaptable long-life sensors could be developed by new theories and new effects. The principle and methods to select controlled sections and optimize the layout design of measuring points were illustrated. The functional requirements were elaborated on about the acquisition, transmission, processing, and management of sensing information. Some advanced concepts about the method of bridge safety evaluation were demonstrated and technology bottlenecks in the current safety evaluation were also put forward. Ultimately, combined with engineering practices, an application was carried out. The results showed that new, intelligent, and reliable sensor technology would be one of the main future development directions in the long-span bridge health monitoring and evaluation field. Also, it was imperative to optimize the design of the health monitoring system and realize its standardization. Moreover, it is a heavy responsibility to explore new thoughts and new concepts regarding practical bridge safety and evaluation technology.
Highlights
As lifeline engineering, bridges are in a stage of rapid development at present, and the community has attached great importance to the operational safety of bridges
As a result of the health monitoring and evaluation of long-span bridges based on sensing technology, the research status, positive innovation, and the scientific grasp of damage evolution laws need to be recognized to ensure the safety of the structures [17]
With the rapid development of science and technology, there has been some breakthroughs in the long-term stability, reliability, durability, and other aspects of sensors
Summary
Bridges are in a stage of rapid development at present, and the community has attached great importance to the operational safety of bridges. In China, the department of transportation released “Technical specification for structural safety monitoring systems of highway bridges” [15] When they were applied to engineering practices, there were still some obvious shortcomings, such as the mechanism and technology of monitoring and sensing, monitoring theory and technology of the service lifetime, the processing of monitoring information [16], structural status evaluation, etc. The combined effects of the complex service environment and disaster loads can accelerate the damage evolution of long-span bridges, which will have negative results on the health and safety of the overall structure. As a result of the health monitoring and evaluation of long-span bridges based on sensing technology, the research status, positive innovation, and the scientific grasp of damage evolution laws need to be recognized to ensure the safety of the structures [17]
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