Complexity and robustness of structures against extreme events

Tipo di pubblicazione: Tesi di dottorato
Tipologia MIUR: Tesi di dottorato > Tesi di dottorato - Polito
Titolo: Complexity and robustness of structures against extreme events
Autori: De Biagi Valerio
Autori di ateneo:
Tutor: Chiaia B.
Dottorato di ricerca: XXVI Ciclo > INGEGNERIA DELLE STRUTTURE
Istituzione: Politecnico di Torino
Numero di pagine: 193
Abstract: Civil structures are designed to support the loads acting on them. At present, the common practitioner considers both ordinary (winds, snow, accidental loads) and extreme events (earthquake, fire), combines the actions in such a way that, once the resistance of the elements is determined, the probability of failure is limited to a prescribed value. The set of events that may interest the structure is known and, therefore, a statistics of the actions is defined a priori. However, other events that are not forecastable may interest the construction. The sources of such events, called "Black Swans" after Taleb, are unknown, as well as their magnitude. For ensuring the integrity of the construction in such situations, which imply large damages, robust measures have to be taken (Chapter 3). Structural engineering is not the only domain in which unexpected events occur. Nature is the realm of contrasts. By means of evolution, living species differentiates, differentiated, in order to survive and reproduce. Various strategies were implemented in order to guarantee a biological robustness. Such mechanisms evoke one fundamental property of systems, the complexity and the connectivity between the components. The interaction between the parts makes the whole system more robust and tolerant to errors and damages (Chapters 1 and 2). Robustness in structures is implemented through classical strategies, which tend to limit the extent of damages through a design based on the consequences (Chapter 4). Being inspired by natural strategies, the idea of complexity in structural engineering is explored. Many issues arise, since a proper definition of this term has not been stated yet (Chapters 5 and 6). The ef- fects of element removal on frame structures, which represent an example of highly connected structural scheme, are investigated. As a result of simple simulations, the trend observed in Nature, which wants the complex systems to be robust to random damages, are spotted in the loaded structural schemes (Chapter 7)
Data: 2014
Status: Pubblicato
Lingua della pubblicazione: Inglese
Parole chiave: robustness, structural complexity, extreme events
Dipartimenti (originale): DISEG - Dipartimento di Ingegneria Strutturale, Edile e Geotecnica
Dipartimenti: DISEG - Dipartimento di Ingegneria Strutturale, Edile e Geotecnica
URL correlate:
Area disciplinare: Area 08 - Ingegneria civile e Architettura > SCIENZA DELLE COSTRUZIONI
Data di deposito: 08 Giu 2016 14:40
Data ultima modifica (IRIS): 08 Giu 2016 12:40:27
Data inserimento (PORTO): 14 Giu 2016 14:37
Numero Identificativo (DOI): 10.6092/polito/porto/2540889


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