Fabozzi, Stefania (2017) Behaviour of segmental tunnel lining under static and dynamic loads. [Tesi di dottorato]

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Item Type: Tesi di dottorato
Resource language: English
Title: Behaviour of segmental tunnel lining under static and dynamic loads
Creators:
CreatorsEmail
Fabozzi, Stefaniastefania.fabozzi@unina.it
Date: 7 April 2017
Number of Pages: 293
Institution: Università degli Studi di Napoli Federico II
Department: Ingegneria Civile, Edile e Ambientale
Dottorato: Ingegneria strutturale, geotecnica e sismica
Ciclo di dottorato: 29
Coordinatore del Corso di dottorato:
nomeemail
Rosati, Lucianorosati@unina.it
Tutor:
nomeemail
Bilotta, EmilioUNSPECIFIED
Zollo, AldoUNSPECIFIED
Date: 7 April 2017
Number of Pages: 293
Keywords: segmental tunnel lining, seismic behaviour of circular tunnel, fragility curves, earthquake early warning system
Settori scientifico-disciplinari del MIUR: Area 08 - Ingegneria civile e Architettura > ICAR/07 - Geotecnica
Date Deposited: 25 Apr 2017 22:04
Last Modified: 13 Mar 2018 07:52
URI: http://www.fedoa.unina.it/id/eprint/11621
DOI: 10.6093/UNINA/FEDOA/11621

Collection description

The aim of the research thesis is to provide a three-dimensional numerical model suitable to interpret the static and dynamic behaviour of a kind of segmental tunnel lining in soft soil. The static performance of the structure is investigated during the tunnel construction, involving the main tunnelling loads, obtaining the evolution of the state of stress and strain in the lining. The dynamic performance of segmental lining has been investigated both under uniform and not uniform seismic loads. In the case of uniform seismic load, pseudo static and full dynamic approaches have been compared, while non-linear coupled analysis have been used to investigate the post-earthquake lining condition. A study of the seismic vulnerability of such structures has been conducted based on fragility curves for different levels of damage. A procedure for the forecast method of risk assessment has been proposed for the case of segmental tunnel lining assuming as critical damage parameter the longitudinal joints rotation. Furthermore, a study of feasibility of Earthquake Early Warning System, EEWS, based on thresholds has been conducted through a probabilistic and a real-time approach for such tunnel structure. The coupling effect of multi-directional seismic motion both in transversal and longitudinal direction of the tunnel has also taken into account in the evaluation of dynamic tunnel behaviour. A comparison between the effect of synchronous and not synchronous seismic motion along the tunnel axis has been done in terms of dynamic increment of the components of forces in the lining.

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