Abstract
A simple approximate hand method of analysis is presented for determining the internal forces in multi-storey structures subject to torsional loading. The buildings may include plan-symmetric combinations of coupled walls, rigid frames, wall-frames, single shear walls, rigid frames with central shear walls and braced frames. The bending deformations in all individual structural members are taken into account as well as the axial shortening and lengthening of the columns. The method is based on the continuous medium analogy which enables the analysis to be reduced to simple closed formulae. It is restricted to structures with uniform geometry up the height and linear elastic behaviour of the structural members. It provides a simple and rapid means of estimating the internal forces in each individual structural element and it is appropriate to the preliminary stages of the design of proposed tall building structure.
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