Toward enhancing community resilience: Life-cycle resilience of structural health monitoring systems

Resilience is becoming a vital quality, particularly as our built environment faces increasing risks due to the aging of our infrastructure and climate change. Moreover, the built environment is relying largely on information technology and becoming digitalized. Consequently, it is crucial to ensure in addition to the resilience of structures and infrastructure, the resilience of the structural health monitoring SHM systems which provide information and help sustain and monitor the functionality of the built environment. The process involved in securing resilience throughout the life cycle of monitoring systems includes 1) planning and preparation before acute shock events and daily stressors, 2) absorption of shock events and 3) recovery and adaption afterward, as well as a continuous adaption for the daily stressors. Furthermore, enhancing the resilience of SHM systems contributes to, as well as improves, the resilience of structures and infrastructures. In this article, the life cycle resilience of SHM systems is discussed including community participation in SHM via crowdsensing. Comparisons between the resilience of SHM systems are presented. Results are discussed, and recommendations are offered

Review on smartphone sensing technology for structural health monitoring

Sensing is a critical and inevitable sector of structural health monitoring (SHM). Recently, smartphone sensing technology has become an emerging, affordable, and effective system for SHM and other engineering fields. This is because a modern smartphone is equipped with various built-in sensors and technologies, especially a triaxial accelerometer, gyroscope, global positioning system, high-resolution cameras, and wireless data communications under the internet-of-things paradigm, which are suitable for vibration- and vision-based SHM applications. This article presents a state-of-the-art review on recent research progress of smartphone-based SHM. Although there are some short reviews on this topic, the major contribution of this article is to exclusively present a compre- hensive survey of recent practices of smartphone sensors to health monitoring of civil structures from the per- spectives of measurement techniques, third-party apps developed in Android and iOS, and various application domains. Findings of this article provide thorough understanding of the main ideas and recent SHM studies on smartphone sensing technology