Page 251 - Dynamic Loading and Design of Structures
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Figure 5.17 Static load-deformation characteristic of jacket for different pile-soil models, (a) Broad
side loading; (b) end on loading (Moan et al., 1997).
Utilization of the true ultimate limit of the structural system may imply inelastic deformations.
Cyclic wave or earthquake loading may cause degradation of the strength and lead to failure
at load amplitudes which are less than for monotonically increasing loading (Hellan et al.,
1991; Stewart et al., 1993).
The dynamic behaviour of fixed platforms under load levels that ensure linear elastic
behaviour is stiffness dominated and inertia forces amplify the response as discussed in
Section 5.5.1. However, as the ultimate strength of the structure as a
