A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Results and discussions
Abstract The present study involves the fatigue analysis of a pile supported steel jacket platform subjected to random sea waves and current loading. The structure is analysed using the substructure approach. The structure subsystem and the foundation subsystem are modelled separately. The jacket structure is modelled as a plane frame. The contribution of the members in the orthogonal frames of the steel jacket to the total mass, damping and hydrodynamic forces are also accounted for in the analysis of the idealized structure. The foundation subsystem is replaced at the pile-structure interface by equivalent linear springs and viscous dampers characterized by pile-head impedance functions. These properties are obtained by analyzing the pile by the proposed transfer matrix approach taking soil-pile interaction into account. The dynamic response of the steel jacket platform is expected to be sensitive to the pile-head impedance. It is difficult to get a correct estimate of the pile head impedance because of the inherent uncertainties in the soil properties. Therefore, it is needed first to study the influence of soil-pile parameters on the pile head impedance functions. In the subsequent sections the study involves specific investigations into the sensitivity of fatigue behaviour of a steel jacket platform to several uncertainties in pile foundation characteristics, hydrodynamic loading, structural modelling and fatigue damage model.
Results and discussions
Abstract The present study involves the fatigue analysis of a pile supported steel jacket platform subjected to random sea waves and current loading. The structure is analysed using the substructure approach. The structure subsystem and the foundation subsystem are modelled separately. The jacket structure is modelled as a plane frame. The contribution of the members in the orthogonal frames of the steel jacket to the total mass, damping and hydrodynamic forces are also accounted for in the analysis of the idealized structure. The foundation subsystem is replaced at the pile-structure interface by equivalent linear springs and viscous dampers characterized by pile-head impedance functions. These properties are obtained by analyzing the pile by the proposed transfer matrix approach taking soil-pile interaction into account. The dynamic response of the steel jacket platform is expected to be sensitive to the pile-head impedance. It is difficult to get a correct estimate of the pile head impedance because of the inherent uncertainties in the soil properties. Therefore, it is needed first to study the influence of soil-pile parameters on the pile head impedance functions. In the subsequent sections the study involves specific investigations into the sensitivity of fatigue behaviour of a steel jacket platform to several uncertainties in pile foundation characteristics, hydrodynamic loading, structural modelling and fatigue damage model.
Results and discussions
Gupta, Ashok (author) / Singh, Ramesh Prasad (author)
1986-01-01
144 pages
Article/Chapter (Book)
Electronic Resource
English
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