Research status and future prospects of space structure health monitoring

Space structures are the main form of long-span, large-space, and large-area building structures, which are widely used in national infrastructure and urban construction, and their structural safety is of paramount importance. Space structure health monitoring (SSHM) accurately obtains structural responses through sensing technology, reflects the performance state of the structure in real-time, and provides a scientific basis and guidance for the construction, operation, and management decision of space structures. After years of research and engineering practice, wireless-sensor technology based on the internet of things has been developed, which is suitable for large-span space structures. Multi-dimensional data analysis theory has been proposed, and the large-scale applications have been implemented in major projects such as the National Stadium, the National Speed Skating Oval, and the Beijing Daxing International Airport Terminal Building, the research progress has been achieved. By systematically summarizing the current research and applications of SSHM, the characteristics of SSHM are clarified, and the current research situation of the sensing technology is reviewed around the multi-dimensional sensing of load and response, as well as the large-area transmission networks. The monitoring data analysis theories are summarized, including structural load analysis, response analysis, and structural condition assessment. Meanwhile, future research directions are foreseen based on the integration of big data, cloud computing, and artificial intelligence, aiming to further promote the innovation and development of SSHM. © 2022 Science Press. All rights reserved.