Abstract: An approach is presented for the generation of seismic floor response spectra for structures which cannot be modeled as classically damped. Although the nonclassically damped structures do not possess classical modes, the ...

Abstract: A mode synthesis approach is presented to calculate the eigenproperties of a structure from the eigenproperties of its substructures. The approach consists of synthesizing the substructures ...

Abstract: Earthquake motions as felt by structures along three orthgonal directions are, in general, statistically correlated. Here the effect of this correlation on structural response is studied. Assuming the existence of principal ...

Abstract: The truncation of the high frequency modes, so commonly used in dynamic structural analysis, sometimes can cause significant errors in the calculated response; this is caused by the so‐called missing mass effect. Such mode ...

Abstract: A mode synthesis method is developed for obtaining the modal properties of a combined single‐degree‐of‐freedom (SDF) equipment and structure system in terms of the modal properties of the individual systems. The eigenvalues ...

Abstract: In the current practice of seismic design of secondary systems, the interaction between the supporting structure and the secondary systems is often ignored, the interaction between any two secondary systems through their ...

Abstract: The paper presents a convenient formulation for the optimal design of viscous dampers, represented by a Maxwell model. The Maxwell model captures the frequency dependence of the damping and stiffness coefficients observed ...