DYNAMIC TORSIONAL COUPLING IN TALL BUILDING STRUCTURES.

The paper shows how the existing approaches to the dynamic analysis of asymmetric tall buildings, using a single story torsional coupling analogy, can be applied to a wide class of irregular structures and under what conditions. A step by step procedure using the response spectrum technique is outlined and illustrated by a numerical example. A three-dimensional rather than two-dimensional formulation is adopted to emphasize the generality of the approach. The discrete and distributed parameter formulations are followed throughout the mathematical exposition.