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C. Adam, F. Ziegler:
"Dynamic response of substructures in friction damped braced frames";
in: "Proc. of 11th World Conference on Earthquake Engineering (11WCEE)", issued by: Sociedad Mexicana de Ingeniera Sismica, A.C.; Elsevier Science, Oxford, 1996, ISBN: 0080428223, Paper ID 256, 8 pages.

Efficient exact and approximate solution techniques are developed to compute the response of secondary structures, which are attached to friction damped braced frames under earthquake excitation as well as to calculate floor spectra at low computing costs. Slip deformations of the primary structure are treated as additional "internal" forcing terms acting on the linear background structure of initial stiffness and their intensity is calculated in an iterative process. Modal coupling of tuned modes is considered. A numerical example is shown for a 4-storey plane frame under earthquake excitation with a SDOF oscillator attached as the secondary system. Approximate results are compared to those derived from a fully coupled analysis, in order to evaluate their validity.