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Politecnico di Torino (2019)

Windblown Sand Modelling and Mitigation for Civil Structures

RAFFAELE, LORENZO

Titre : Windblown Sand Modelling and Mitigation for Civil Structures

Auteur : RAFFAELE, LORENZO

Université de soutenance : Politecnico di Torino

Grade : Doctoral Dissertation 2019

Descriptif
The thesis develops according to the above objectives through the following chapters. The introduction to the study is presented in Chapter 1. Chapter 2 is devoted to the state-of-art and includes a phenomenological analysis of the physical processes, a review concerning the existing semi-empirical models to assess windblown sand transport, a critical review of existing sand mitigation measures for railways, and existing design codes and best practices. The modelling framework and the study outline are conceptually introduced and justified in Chapter 3. Chapter 4 is devoted to the probabilistic modelling of incoming windblown sand upwind built structures. The outlined probabilistic approach is then applied to different test cases around Arabian Peninsula. Chapter 5 is devoted to the probabilistic modelling of windblown sand action on structures. First, a phenomenological analysis of windblown sand processes around built structures is provided. The so-called windblown sand limit states are defined in analogy to the common practice in structural engineering. Then, the modelling framework to assess windblown sand action is outlined. Finally, the proposed modelling framework is applied to a case study in order to demonstrate its technical feasibility of the approach and assess the performances of two alternative design solutions against windblown sand. Finally, conclusions and research perspectives are discussed in Chapter 6. Présentation

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