Composite columns considered as steel columns in the model used for analysis

Clauses 7.5.3(3), If a composite column is considered as a steel column in the structural model, it is 7.5.3(4), a dissipative member, but with only the resistance of the steel parts considered in the

7.6.1(7) dissipative zones. The advantage of this option is that all requirements in Section 7 of

EN 1998-1 for composite columns can be ignored. However, the general requirement in clause 7.5.3(4) still applies: the capacity design of connections or of the foundation of that column has to based on the upper bound value of the resistance of the column, i.e. its composite resistance as a result of the presence of concrete.

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