Analysis of nonclassically damped structures subjected to six correlated earthquake components

The paper describes a method for the calculation of structural response of nonclassically damped structures subjected to six correlated earthquake components. The rotational components of the inputs are related to the translational components. A methodology to obtain the maximum response of a nonclassically damped structure, which can possibly occur in an orientation of the structure with respect to the impinging seismic waves, is developed. The approach is suitable for its adoptation with seismic inputs defined in terms of response spectra or spectral density functions. The numerical results demonstrating the application of the approach are presented. It is observed that the effect of the rotational components on the calculated response can be significant.