A Graphical Method of Predicting Sidesway in the Design of Multistorey Buildings.

Design of unbraced multi-storey steel frames

“…An alternative approach was proposed by Wood and Roberts [21,23]. Their method was one of analysis, with each storey substituted by a cell comprising a single column and upper and lower beams (Fig.…”

“…(7) and (8), the summation is over all the relevant members in the real frame at the level being considered; the second moments of area I and the beam spans L are those of the members of that frame. Values of φ have been plotted against k t and k b [21,23].…”

“…However, in theory one would also be changing column sizes from storey to storey, to reflect increasing horizontal shear and any changes in storey height. It has been shown [24] that k t and k b then remain equal provided that they are redefined to account for continuity in connection between storeys [7,21,23].…”