Author : Xuan Li
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (133 download)
Book Synopsis Dynamic Performance of Coastal and Offshore Structures Under Combined Wind and Wave Loadings by : Xuan Li
Download or read book Dynamic Performance of Coastal and Offshore Structures Under Combined Wind and Wave Loadings written by Xuan Li and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Civil structures located in the coastal or offshore regions are subjected to continuous wind and wave loads. Structural reliability and survivability could be significantly reduced, especially during extreme weather events. Detailed analyses of wind and wave characteristics, interactions between wind and wave loads and structures, and structural performances under such loads are essential to be carried out. Depending on the locations of the structures, both environmental conditions and structural designs can vary with each other significantly. Structures located in the coastal region could experience combined wind and wave events during hurricanes, and coastal structural assessment is usually performed under extreme weather events with a high return period to inspect the structural survivability. Meanwhile, waves usually get dissipated while arriving at the shorelines by some resilience options. However, offshore structures located in deep seas are subjected to higher wind and more violent waves with strong correlations. The complicated and harsh environmental conditions at deep seas could inevitably result in more significant structural dynamic responses. With years of service, fatigue damages could be critical and affect structural safety and serviceability. A general numerical framework in structural performance assessment for both coastal and offshore structures under wind and wave loads is developed in this dissertation. Two typical coastal and offshore structures are discussed. For coastal residential buildings, a combination of computational fluid dynamics (CFD) simulation and finite element modeling (FEM) is implemented to evaluate the building vulnerability during extreme weather events. Furthermore, the effect of breakwaters serving as the coastal protective measure on building safety is also investigated. For floating offshore wind turbines, both statistical models and machine learning models are applied to evaluate fatigue damage accumulations considering uncertainties from realistic environmental conditions. The canonical vine (C-vine) copula model is established to model the multivariate dependency structure for on-site wind and wave-related environmental parameters. Two surrogate models, including the Kriging model and the artificial neural network (ANN), are used to efficiently predict short-term fatigue damages at critical locations. A novel physics-informed deep learning model is also established to efficiently obtain structural dynamic responses under different disturbances.