Utilizing Design Events Within Risk-Based Design

by A. Bruce Dunwoody, Dome Petroleum Ltd, Calgary, Alberta, Can,

Document Type: Proceeding Paper

Part of: Civil Engineering in the Arctic Offshore


Design load selection based on the return period of an environmental event is not possible when the event is described by more than one parameter. Risk analysis can be used to associate a return period to a load. However, risk-based design load selection has some shortcomings. To alleviate some of those shortcomings, the concept of a design event amenable to risk-based design load selection is introduced. An example of free-drifting multi-year ice floes hitting a structure is used to illustrate the concept. Applications of the concept as well as cautions in the application are discussed.

Subject Headings: Risk management | Offshore structures | Structural analysis | Load and resistance factor design | Impact loads | Sustainable development | Environmental issues | Parameters (statistics)

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