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This work introduces a novel approach that employs deep neural networks to enhance stochastic SHM methods. A learnable feature extractor and a feature-oriented surrogate model are synergistically exploited to evaluate a likelihood function within a Markov chain Monte Carlo sampling algorithm. The feature extractor undergoes pairwise supervised training to map sensor recordings onto a low-dimensional metric space, which encapsulates the sensitivity to structural health parameters. The surrogate model maps structural health parameters to their feature representation. The procedure enables the updating of beliefs about structural health parameters, eliminating the need for computationally expensive numerical models. A preliminary offline phase involves the generation of a labeled dataset to train both the feature extractor and the surrogate model. Within a simulation-based SHM framework, training vibration responses are efficiently generated using a multi-fidelity surrogate modeling strategy to approximate sensor recordings under varying damage and operational conditions. The multi-fidelity surrogate exploits model order reduction and artificial neural networks to speed up the data generation phase while ensuring the damage-sensitivity of the approximated signals. The proposed strategy is assessed through three synthetic case studies, demonstrating high accuracy in the estimated parameters and strong computational efficiency.<\/jats:p>","DOI":"10.1007\/s00366-025-02224-x","type":"journal-article","created":{"date-parts":[[2025,12,2]],"date-time":"2025-12-02T04:20:01Z","timestamp":1764649201000},"page":"4953-4975","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Enhancing Bayesian model updating in structural health monitoring via learnable mappings"],"prefix":"10.1007","volume":"41","author":[{"given":"Matteo","family":"Torzoni","sequence":"first","affiliation":[]},{"given":"Andrea","family":"Manzoni","sequence":"additional","affiliation":[]},{"given":"Stefano","family":"Mariani","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2025,12,2]]},"reference":[{"key":"2224_CR1","doi-asserted-by":"publisher","unstructured":"A\u00a0S of\u00a0Civil\u00a0Engineers (2018) Adaptive design and risk management, American Society of Civil Engineers, Reston, Virginia, ch 7, pp 173\u2014-226. https:\/\/doi.org\/10.1061\/9780784415191.ch07","DOI":"10.1061\/9780784415191.ch07"},{"issue":"1","key":"2224_CR2","doi-asserted-by":"publisher","first-page":"4","DOI":"10.1061\/(ASCE)1076-0342(2008)14:1(4)","volume":"14","author":"SD Glaser","year":"2008","unstructured":"Glaser SD, Tolman A (2008) Sense of sensing: from data to informed decisions for the built environment. 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