Local member response in offshore structures under earthquake excitations

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Abstract
It is pointed out that local vibrations of certain members in earthquake excited offshore structures can induce substantial stresses that may often dominate the design of these members. Such vibrations are not accounted for in dynamic analyses of structural models with masses lumped at the joints. A practical, easy to implement solution to this problem is recommended and results from an actual structure, subjected to a three‐component real earthquake, are presented demonstrating the importance of local inertia effects.

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