Soil Plasticity

Prestazione sismica dei pozzi di fondazione

In questo articolo si discutono i metodi per la valutazione della prestazione sismica dei pozzi
di fondazione di pile di ponti o viadotti di grande luce. Si tratta dapprima del ruolo dei pozzi
nei fenomeni di interazione terreno-struttura, descrivendo le peculiarità di tale tipo di
fondazione, confrontandole con quelle delle fondazioni superficiali, e presentando un esame
critico dei metodi maggiormente utilizzati nella pratica professionale. Successivamente,
vengono illustrati i principali risultati di uno studio parametrico effettuato mediante analisi

The influence of soil plasticity on the seismic performance of bridge piers on caisson foundations

This paper investigates the role of soil plasticity on the seismic performance of bridge piers founded on cylindrical caissons through a numerical study where the geometrical and mechanical properties of the caisson and the pier, as well as the weight of the deck, are varied. Numerical models of the soil-caisson-pier-deck systems are subjected to six real acceleration time histories differing in frequency content, strong-motion duration and intensity.

On the assessment of seismic performance of bridge piers on caisson foundations subjected to strong ground motions

Substructure method is widely used to evaluate the seismic performance of caisson foundations supporting bridge piers subjected to strong ground motions, mainly because of its simplicity. However, the strongly-simplifying assumption of linear viscous-elastic behaviour for the foundation soil limits its applicability to flexible systems subjected to low-intensity earthquakes, for which irreversible strains and pore water pressure build-up are not anticipated.

© Università degli Studi di Roma "La Sapienza" - Piazzale Aldo Moro 5, 00185 Roma