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F: Accidental Conditions [Table of Contents] H: Structure in Way of a Fixed Mooring System

DNV-OS-C201 Structural Design of Offshore Units (WSD method)

[-] Sec.11: Special Considerations for Column Stabilised Units
[-] G: Redundancy

Sec.11
G. Redundancy

Sec.11
G 100   General

Sec.11 G
101   Structural robustness shall, when considered necessary, be demonstrated by appropriate analysis. Slender, main load bearing structural elements shall normally be demonstrated to be redundant in the accidental design condition.

Sec.11
G 200   Brace arrangements

Sec.11 G
201   For bracing systems the following considerations shall apply:
  1. Brace structural arrangements shall be investigated for relevant combinations of global and local loads.
  2. Structural redundancy of slender bracing systems (see G100) shall normally include brace node redundancy (i.e. all bracings entering the node), in addition to individual brace element redundancy.
  3. Brace end connections (e.g. brace and column connections) shall normally be designed such that the brace element itself will fail before the end connection.
  4. Underwater braces shall be watertight and have a leakage detection system.
  5. The effect of slamming on braces shall be considered, e.g. in transit condition.
F: Accidental Conditions [Table of Contents] H: Structure in Way of a Fixed Mooring System