Presentazione, 2014, ENG

Analisi strutturale del "Voltone" a Livorno

Briccoli-Bati S.; Girardi M.; Lucchesi M.; Padovani C.; Pellegrini D.

Dipartimento di Ingegneria Civile e Ambientale, Università degli studi di Firenze; CNR-ISTI, Pisa, Italy; Dipartimento di Ingegneria Civile e Ambientale, Università degli studi di Firenze; CNR-ISTI, Pisa, Italy; Dipartimento di Ingegneria dell'Energia, dei Sistemi, del Territorio e delle Costruzioni, Università di Pisa, Italy;

We present in this paper a nonlinear structural analysis of the "Voltone", a large vaulted masonry tunnel located beneath "Piazza della Repubblica" square in Livorno, Italy. The safety of the structure is numerically assessed via the NOSA-ITACA finite element code (www.nosaitaca.it), under permanent and accidental loads. The most adopted assessment procedures for masonry bridges and tunnels are based on the limit analysis and are aimed at providing an estimate of their load carrying capacity (Heyman, 1982, Gilbert, 1997, Brencich, 2009, Cavicchi & Gambarotta, 2007, Fanning & Boothby, 2001, Oliveira et al., 2010). On the contrary, in the study presented here a nonlinear incremental approach is followed. Masonry is modelled by a masonry-like constitutive equation with zero tensile strength and bounded compressive strength (Lucchesi et al., 2008). The "Voltone" is constituted by a segmental vault, through which the "Fosso Reale" canal flows. The vault is set on two lateral walls and strengthened by buttresses placed at intervals of about 5.8 meters one from the other. Under permanent loads, such as the weight of the structure and of the filling material, and the earth pressure acting on the walls, a "tight crowd" load in the central region of the square and the traffic loads on the square's ends are modelled. All loads are applied to the structure in accordance with the load combinations for ultimate limit states. The analyses have enabled assessing the structure's safety in light of current Italian regulations (D.M. 14 gennaio 2008 and Circolare 2 febbraio 2009). This case study, conducted in collaboration with the Municipality of Livorno and with the financial support of the Region of Tuscany, on the one hand provided an opportunity to validate the NOSA-ITACA code, on the other highlighted the key role played by numerical tools in assessing the safety of ancient masonry constructions and supporting institutions and designers during maintenance and restoring operations.

SAFE MONUMENTS - Conservation vs Safety of Monuments and Historical Constructions, Firenze, 28 marzo 2014

Keywords

Masonry buildings, Nonlinear elasticity, Numerical methods, Safety assessment

CNR authors

Girardi Maria, Padovani Cristina

CNR institutes

ISTI – Istituto di scienza e tecnologie dell'informazione "Alessandro Faedo"

ID: 280590

Year: 2014

Type: Presentazione

Creation: 2014-05-16 14:07:16.000

Last update: 2016-05-03 10:00:24.000

External links

OAI-PMH: Dublin Core

OAI-PMH: Mods

OAI-PMH: RDF

External IDs

CNR OAI-PMH: oai:it.cnr:prodotti:280590