Reduction of linear elastic response spectra due to elastoplastic behaviour of systems
Por:
Ruiz S.E., Diaz O.
Publicada:
1 ene 1991
Resumen:
Using the responses obtained from five groups of accelerograms recorded in soft and hard soils in Mexico City, the well known rules proposed by Newmark (1970) for estimating nonlinear response spectra on the basis of the elastic ones are analyzed for different types of ground motion. This study indicates that the mentioned rules (applied to the mexican seismic code of 1987), give place to different results with respect to those obtained directly from records, depending on: a) ductility reduction factors, b) frequency-content characteristics of motions, and c) structural vibration periods. A critical analysis of the results is made. A set of simple rules to reduce the elastic spectra due to elastoplastic behavior is given. Each rule corresponds to different soil conditions.
Filiaciones:
Ruiz S.E.:
Instituto de Ingenieria, UNAM, Apdo Postal 70-472, Coyoacan, 04510, Mexico, D.F., Mexico
Diaz O.:
Instituto de Ingenieria, UNAM, Apdo Postal 70-472, Coyoacan, 04510, Mexico, D.F., Mexico
|