This article considers continuous frames in multi-storey buildings. Continuous frames are moment resisting where the beam to column connections are classified as rigid and are designed to transmit the beam end moments and shear forces into the column. No bracing system is required to resist lateral loads and frame stability is provided by the rigidity of the connections and the stiffness of the members only.
Frames can also be designed as 'semi-continuous', however, this type of frame is not considered here. Further information on 'semi-continuous' frames is provided in SCI P183 and SCI P263.
Continuous frames for buildings are used where vertical bracing is not acceptable, i.e. for aesthetics or access reasons. A key advantage of continuous frames is the ability to minimize the depths of the beams.
This article considers how continuous frames are analysed and designed and the types of connections that are used.