Submerged floating tunnel(SFT) has been thought as a promising crossing technology and been studied in many countries for its realization. has superior advantages to conventional crossing technologies such as bridge or subsea tunnel but it is also requiring technological innovation to keep the structural stability against environmental disturbance with safety measures for unexpected emergency. Therefore, various designs of SFT have been proposed for numerous crossing sites and its design standard has not yet been established. In this thesis is more devoted to seaquake effects, acting like an additional hydrodynamic loading arising from the earthquake transmission through water from the seabed. A brief history and development of research on the phenomenon is given. due to its complexity, some simplifying hypothesis and assumptions have been taken to carry out the seaquake effects deduction. The deduction of seaquake velocity potential with energy absorption of sea bed consideration of the flexible seabed in one dimension is described in the chapter and Appendix A. The effects of energy absorption, density of soil layers, shear modulus and depth of water are compared. Same concept is implemented for seaquake generation Fortran code and generated results are applied to SFT and compared. Further studies required on the concept of flexible seabed is effects on the seaquake, in this thesis compared some factors and results are concluded but there is lot of other factors are needed to be evaluated.
Il tunnel galleggiante sommerso (SFT) è stato considerato una promettente tecnologia di attraversamento e è stato studiato in molti paesi per la sua realizzazione. ha vantaggi superiori alle tecnologie di attraversamento convenzionali come le gallerie ponte o sottomarine, ma richiede anche l'innovazione tecnologica per mantenere la stabilità strutturale contro i disturbi ambientali con misure di sicurezza per l'emergenza inaspettata. Pertanto, sono stati proposti diversi disegni di SFT per numerosi siti di attraversamento e il suo standard di progettazione non è ancora stato stabilito. In questa tesi è più dedicato agli effetti del mare, agendo come un ulteriore carico idrodinamico derivante dalla trasmissione del terremoto attraverso l'acqua dal fondo marino. Viene fornita una breve storia e uno sviluppo della ricerca sul fenomeno. a causa della sua complessità, sono state prese alcune ipotesi e ipotesi semplificanti per eseguire la deduzione degli effetti del mare. La deduzione del potenziale di velocità di marea con l'assorbimento energetico della base del letto marino del fondale flessibile in una dimensione è descritta nel capitolo e nell'appendice A. Sono confrontati gli effetti dell'assorbimento di energia, la densità di strati del terreno, il modulo di taglio e la profondità dell'acqua. Lo stesso concetto è attuato per il codice Fortran di generazione del mare e i risultati generati vengono applicati a SFT e confrontati. Ulteriori studi richiesti sul concetto di fondale flessibile sono gli effetti sul marequake, in questa tesi hanno confrontato alcuni fattori e risultati sono conclusi ma ci sono molti altri fattori necessari per essere valutati.
The dynamic responses of submerged floating tunnel subjected to seaquake induced from flexible bed
GIDDELAHALLI HONNAPPA, HEMANTH KUMAR
2016/2017
Abstract
Submerged floating tunnel(SFT) has been thought as a promising crossing technology and been studied in many countries for its realization. has superior advantages to conventional crossing technologies such as bridge or subsea tunnel but it is also requiring technological innovation to keep the structural stability against environmental disturbance with safety measures for unexpected emergency. Therefore, various designs of SFT have been proposed for numerous crossing sites and its design standard has not yet been established. In this thesis is more devoted to seaquake effects, acting like an additional hydrodynamic loading arising from the earthquake transmission through water from the seabed. A brief history and development of research on the phenomenon is given. due to its complexity, some simplifying hypothesis and assumptions have been taken to carry out the seaquake effects deduction. The deduction of seaquake velocity potential with energy absorption of sea bed consideration of the flexible seabed in one dimension is described in the chapter and Appendix A. The effects of energy absorption, density of soil layers, shear modulus and depth of water are compared. Same concept is implemented for seaquake generation Fortran code and generated results are applied to SFT and compared. Further studies required on the concept of flexible seabed is effects on the seaquake, in this thesis compared some factors and results are concluded but there is lot of other factors are needed to be evaluated.| File | Dimensione | Formato | |
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https://hdl.handle.net/10589/136280