An Application of a Proposed Stiffness-Strength-Ductility Design Approach to a Five-storey Steel Building Structure

It is known that the seismic response of a structural system is highly influenced, in addition to the earthquake input, by the dynamic characteristics of the system itself. This paper presents an innovative approach for an optimised/fullcontrolled seismic design of structures which combines these recent contributions, and overcomes the traditional design approach leading to the identification of the characteristics of the structural system resisting to horizontal loads which enables to satisfy given seismic performance objectives. This is achieved by considering a total conceptual separation between the structural systems resisting to vertical and horizontal loads. The proposed procedure is first briefly developed in general within a PBSD framework and then fully applied to the case study of a five-storey steel building structure.