Dynamic responses of a series (3,024 cases) of 2-degree-of-freedom structure/equipment models to earthquake excitations were determined “exactly” and were compared with approximate responses obtained by a simple approximate seismic analysis technique that is used by some design engineers to determine equipment response spectra. The results of the evaluation of errors in estimating the equipment acceleration spectra with approximate solution techniques indicate that for the system under consideration, (1) the errors fluctuate over a wide range from overly conservative to highly unconservative without any discernible trend, (2) the predictions of the approximate analysis lack consistency, and (3) the range of validity of the approximate solution technique cannot be ascertained.

First Page Preview

First page PDF preview
You do not currently have access to this article.