| Abstract: | Two mode combination methods are presented for structures with non-classical (non-proportional) damping. They are of the same level of complexity as the well-known SRSS and CQC methods. They require only a single, real-valued participation factor for each mode, a single correlation coefficient, and standard relative displacement response spectra. A base-isolation study shows that the standard SRSS and CQC methods for classically damped structures give under-conservative response predictions, and that the proposed methods give accurate predictions. |
