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PSDs are obtained from the real vibration signals of the randomized traffic load model based on accelerometer multi-sensors that indicate the change in mechanical behavior of the structure over time. In addition, AFHs evaluate the workability of the structure. With these parameters in mind, actual vibrations in real beam structures are studied with the aim of using structural health monitoring to assess the bearing capacity reduction on Saigon Bridge\u2019s spans. The results show that AFHs and the high-frequency regions relate to the decreased stiffness of the bridge\u2019s spans over a given period of time. In the future, this research can be used to monitor structural health for various types of structure materials and many different bridge spans.<\/jats:p>","DOI":"10.1177\/15501329221125110","type":"journal-article","created":{"date-parts":[[2022,9,22]],"date-time":"2022-09-22T12:17:30Z","timestamp":1663849050000},"page":"155013292211251","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":5,"title":["PSD characteristics for the random vibration signals used in bridge structural health monitoring in Vietnam based on a multi-sensor system"],"prefix":"10.1177","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4898-091X","authenticated-orcid":false,"given":"Thanh Q","family":"Nguyen","sequence":"first","affiliation":[{"name":"Department of Railway-Metro Engineering, Ho Chi Minh City University of Transport, Ho Chi Minh City, Vietnam"},{"name":"Ho Chi Minh City University of Transport, Ho Chi Minh City, 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