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Seismic analysis of multiply supported secondary systems with dynamic interaction effects
Author(s) -
Burdisso Ricardo A.,
Singh Mahendra P.
Publication year - 1987
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/eqe.4290150807
Subject(s) - protein secondary structure , secondary development , interaction , secondary source , interaction model , structural engineering , primary (astronomy) , spectral line , response spectrum , engineering , biological system , control theory (sociology) , simulation , computer science , chemistry , mathematics , physics , statistics , artificial intelligence , programming language , social science , biochemistry , control (management) , software , astronomy , sociology , world wide web , biology
For a proper response spectrum analysis of a secondary system with multiple supports, the seismic inputs are required to be defined in terms of the auto and cross floor response spectra. If no feed‐back or interaction effect from the secondary system to its supporting primary structure is suspected, these inputs can be developed by a direct analysis of the supporting structure alone. However, sometimes the effect of the interaction on the secondary system response can be quite significant. Herein, a method is developed to incorporate the feed‐back effect, through proper modification of the interaction‐free floor spectrum inputs. The interaction coefficients are used to effect such modifications in different floor spectral quantities. A procedure for the calculation of the interaction coefficients is proposed. The modified floor spectra when used as inputs to the secondary system do introduce the interaction effect in the secondary system response. A successful application of this method is demonstrated by numerical examples of secondary systems with three different secondary‐to‐primary system mass ratios.