Spedicato, Agnese (2025) Hysteretic responses of connections in timber structures: classification, phenomenological modeling and identification. [Tesi di dottorato]
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| Tipologia del documento: | Tesi di dottorato |
|---|---|
| Lingua: | English |
| Titolo: | Hysteretic responses of connections in timber structures: classification, phenomenological modeling and identification |
| Autori: | Autore Email Spedicato, Agnese agnese.spedicato@unina.it |
| Data: | 3 Febbraio 2025 |
| Numero di pagine: | 184 |
| Istituzione: | Università degli Studi di Napoli Federico II |
| Dipartimento: | Strutture per l'Ingegneria e l'Architettura |
| Dottorato: | Ingegneria strutturale, geotecnica e rischio sismico |
| Ciclo di dottorato: | 37 |
| Coordinatore del Corso di dottorato: | nome email Iervolino, Iunio iunio.iervolino@unina.it |
| Tutor: | nome email Rosati, Luciano [non definito] Dion, Jean-Luc [non definito] Vaiana, Nicolò [non definito] Lo Feudo, Stefania [non definito] |
| Data: | 3 Febbraio 2025 |
| Numero di pagine: | 184 |
| Parole chiave: | timber, connections, hysteresis, optimization, nonlinear dynamics |
| Settori scientifico-disciplinari del MIUR: | Area 08 - Ingegneria civile e Architettura > ICAR/08 - Scienza delle costruzioni |
| Informazioni aggiuntive: | La tesi è stata svolta in cotutela con l'università francese. Afferente al ciclo 37° |
| Depositato il: | 24 Ott 2025 10:27 |
| Ultima modifica: | 02 Set 2026 08:07 |
| URI: | https://www.fedoa.unina.it/id/eprint/16578 |
Abstract
Timber structures are gaining widespread recognition as sustainable and innovative solutions for modern construction. Their environmental benefits, excellent mechanical properties, and versatility make them ideal for various applications. However, the dynamic performance of timber elements, particularly under seismic loads, remains a key challenge due to the nonlinear behavior of connections, which strongly influences the structural response. This research focuses on understanding and simulating the dynamic behavior of timber panels and their metallic connections, such as hold-downs and angle brackets, under seismic excitation. These connections govern critical parameters like stiffness, ductility, and energy dissipation, making their accurate representation essential for reliable structural analysis. Despite existing models, the complexity of nonlinear phenomena, such as pinching, degradation, and asymmetry in hysteresis loops, motivates further research to improve accuracy and applicability. The original contributions of this thesis include: (i) a detailed calibration of the Vaiana-Rosati hysteresis model (VRM) to experimental data, enabling the accurate simulation; (ii) the application of optimization techniques, such as genetic algorithms, to systematically identify model parameters; (iii) a comprehensive simulation of the dynamic response of a Cross-Laminated Timber (CLT) panel under vertical and horizontal loads, capturing its three degrees of freedom (vertical and horizontal displacement, and rigid rotation). This work bridges the gap between experimental observations and advanced numerical modeling of timber structures in seismic areas. The findings provide actionable insights for improving design and analysis methodologies, ultimately enhancing the performance and safety of timber buildings in earthquake-prone regions.
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