Simulated seismic tests on 1/42- and 1/14-scale category 1, auxiliary building

Two scale-model structures representing an idealized auxiliary building were seismically tested. The scales (1/42, 1/14) were chosen so that both structures were models of the prototype, and the 1/42-scale model was a 1/3-scale model of the 1/14-scale structure. Both models were constructed out of microconcrete. The 1/42-scale used wire mesh to simulate reinforcing, and the 1/14-scale used model deformed bars. The general result verified previous test experience in this program: the frequency response of these structures, when subjected to seismic design loads, will be below that predicted for the structure using conventional analysis methods. This implies the frequency content and magnitude of floor response spectra, in general, will not be as predicted from the structural analysis. The implication of this result for equipment and piping is under investigation. The recommendation of this program, based on testing thus far, is to verify the conclusions on larger real concrete structures of a geometry that will be agreed upon by the technical review group for this program. 5 refs., 17 figs., 7 tabs