Seismic Response Analysis of Multiply Connected Secondary Systems

摘要

An analytical formulation for seismic analysis of multiply supported secondary systems is developed. The formulation is based on the random vibration theory of structural systems subjected to correlated inputs at several points. The response of the secondary systems is expressed as a combination of the dynamic, pseudo-static and cross response components. The dynamic part is associated with the inertial effect induce by the support accelerations. The pseudo-static part is due to the relative displacement between supports, and the cross part takes into account the correlation between the two parts of the response. The seismic input in the approach is defined in terms of auto and cross pseudo-acceleration and relative velocity floor spectra. Also the information about floor displacements and velocities as well as their correlations is required.