Overstrength for enhancing the robustness of structures

Tipo di pubblicazione: Articolo in atti di convegno
Tipologia MIUR: Contributo in Atti di Convegno (Proceeding) > Contributo in atti di convegno
Titolo: Overstrength for enhancing the robustness of structures
Autori: Ventura, Antonio; Chiaia, Bernardino; De Biagi, Valerio
Autori di ateneo:
Intervallo pagine: pp. 331-348
Tipo di referee: Comitato scientifico
Editore: Gechi edizioni
Volume: 1
Titolo del convegno: AIMETA 2017
Luogo dell'evento: Salerno
Data dell'evento: 4-7/9/2017
Luogo di pubblicazione: Mediglia
Abstract: In the present paper, a methodology able to increase the robustness of a frame struc- ture is proposed. This methodology focuses on the structural behaviour of the key elements, which are endowed with a certain overstrength that can be employed to enhance the capacity of the whole structure to withstand a specific hazard scenario. The "loss of a column" can be an example of the possible scenarios that a robust structure should withstand. The additional resistance due to overstrength can be adopted to reduce direct local damage due to accidental events (local strengthening) and to prevent the propagation of local damage to a dispropor- tionate extent (progressive collapse resistance). Furthermore, this structural measure guaran- tees the formation of alternative load paths and, thus, the capability of the structure to redistribute the loading due to a local damage among the remaining structural components. The paper aims at evaluating the role of overstrength in the design (or in the retrofit) of struc- tural members and in the development of several collapse resisting mechanisms of the whole structure. Those considered for framed structures are: compressive arching, flexural and ten- sile catenary action developed in the beams adjacent to the initial damage, as well as membrane actions developed in the supported floors. In addition, the influence of the portion of structure adjacent to the area directly affected by the damage is considered. The procedure proposed in the present paper suggests a strategy that is suitable for a prelimi- nary robustness-oriented design, involving specific solutions in terms of redundancy, local re- sistance and mechanical properties of the structural members.
Data: 2017
Status: Pubblicato
Lingua della pubblicazione: Inglese
Parole chiave: analytical method, column loss, framed structures, overstrength, robustness
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: 13 Set 2017 15:26
    Data ultima modifica (IRIS): 14 Set 2017 09:25:18
    Data inserimento (PORTO): 17 Set 2017 22:27
    Permalink: http://porto.polito.it/id/eprint/2680073
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