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The first part discusses the general topic of the spectral analysis of linear multi-degree-of-freedom structures subjected to a stationary random field. Particular attention is given to structures with non- classical damping and hereditary characteristics. The method is implemented in the computer program RANDOM. Next, the same concepts are applied to multi-supported structures subjected to a stationary seismic excitation. The method is implemented in the computer program SEISME. Two related problems are dealt with in the next two chapters: item"(i)" the relation between the input of the random vibration analysis and the traditional ground motion specification for seismic analysis (design response spectra); and item"(ii)" the application of random vibration techniques to the direct generation of floor response spectra.par Finally, the problem of extracting information from costly time-history analyses is addressed. This study has mainly been concerned with the methodology and the development of appropriate software. Some qualitative conclusions have been drawn regarding the expected benefit of the approach. They have been judged promising enough to motivate a benchmark exercise. Specifically, the random vibration approach will be compared to the current approximate methods (response spectrum) and time-history analyses (considered as representative of the true response) for a set of typical structures. The hope is that some of the flaws of the current approximate methods can be removed.

Additional information

Bibliographic Reference: EUR 11369 EN (1988) FS, PP 158, ECU 12.50, AVAILABILITY: EUROFFICE, LUXEMBOURG, BP 1003, GDL
Availability: Can be ordered online
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