Doctor of Philosophy, The Ohio State University, 2022, Civil Engineering
Throughout the last several years, the number of detrimental accidents is still considered high and not going below a certain verge. One of the main problems that may put people's safety in danger is the lack of real-time detection, assessment, and recognition of predictable safety risks. Current real-time risk identification solutions are limited to proximity sensing, which lacks in providing meaningful values of the overall safety conditions in real-time.
The overall objective of this research is to envision, design, develop, assemble, and examine an automated intelligent real-time risk assessment (AIR) system. A holistic safety assessment approach is followed to include identification, prioritization, detection, evaluation, and control at risk exposure time. Multi-sensor technologies based on Radio-Frequency Identification (RFID) are integrated with a risk assessment intelligent system. The intelligent system is based on fuzzy fault tree analysis (FFTA), a deductive approach that comprehensively systemizes possible concurrent basic and conditional risk events, not risk symptoms, from major subgroups of triggering, enabling, and environment-related risks. System prototype is developed and examined for functionality and deployment requirements to prove the concept for on-foot building construction worker at site.
The experimental examination results showed that the AIR system was able to detect, assess, and sound deliver combined evaluation of concurrent diverse risks presented in a worker's range at real-time of exposure. The AIR system performance has met the criteria of validity, significance, simplicity, representation, accuracy, and precision and timeliness. The reliability of the AIR system to deliver quantitative values of risk proximity was limited due to the RF signal attenuation caused by different materials at site. Nevertheless, AIR system was reliable in real-time assessment and declaration of risk types, values, and proximity in a subjective lingu (open full item for complete abstract)
Committee: TARUNJIT BUTALIA (Advisor); RONGJUN QIN (Committee Co-Chair); CHARLES TOTH (Committee Member); RACHEL KAJFEZ (Committee Member)
Subjects: Civil Engineering; Cognitive Psychology; Communication; Health Education; Information Science; Linguistics; Mathematics; Occupational Safety