Seismic Design of MR Steel Frames with Slender Shear Walls

摘要

This paper deals with the seismic behaviour of moment resisting steel frames with steel shear walls. A survey of the recent literature concerning the structural application of slender steel shear walls is presented. Then, based on the assumption of the "equivalent diagonal" model, the behaviour of two typical MR steel frames (having 7 and 15 storeys), is analysed. For each frame typology, the primary structure has been designed according to Eurocode 8, starting form lighter structural configurations, i.e. designed according to vertical loads only, and arriving to heavier configuration where also the serviceability limit state is fulfilled. Then, the frames designed according to vertical load only have been upgraded by using several configurations of unstiffened plate shear walls, giving rise to different frame typologies whose seismic behaviour has been evaluated on the basis of push-over analysis. The comparison in terms of strength, stiffness, ductility and structural weight among the above solutions allow several interesting considerations on the optimal design solution for considered steel framed structures to be drawn.