Affidabilità strutturale dei ponti

Affidabilità strutturale dei ponti

Vinicius Heidtmann Avila

105,32 €
IVA incluido
Disponible
Editorial:
KS OmniScriptum Publishing
Año de edición:
2025
Materia
Ciencia, ingeniería y tecnología medioambientales
ISBN:
9786209043680
105,32 €
IVA incluido
Disponible

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L’aumento del traffico di veicoli pesanti sulle autostrade brasiliane richiede che i ponti stradali mantengano elevati livelli di sicurezza. Il presente lavoro presenta uno studio sull’affidabilità strutturale e sulla calibrazione dei coefficienti parziali di sicurezza delle sollecitazioni nelle travi longitudinali in calcestruzzo armato e precompresso, considerando lo stato limite ultimo di flessione. Sono state progettate e analizzate 27 travi - variando la luce, la resistenza del calcestruzzo e la tensione dell’acciaio - utilizzando un modello computerizzato convalidato con i dati sperimentali di 64 travi testate in studi precedenti. I carichi mobili sono stati modellati sulla base di dati di traffico reali e di estrapolazioni statistiche per un periodo di ritorno di 100 anni. Per la valutazione dell’affidabilità è stato utilizzato il metodo FORM, mentre la calibrazione dei coefficienti è stata effettuata tramite ottimizzazione a sciame di particelle (PSO). I risultati indicano che gli attuali standard nazionali garantiscono livelli di sicurezza soddisfacenti e la procedura di calibrazione proposta standardizza gli indici di affidabilità, avvicinandoli al valore target stabilito.

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