A Method for Direct Generation of Floor Acceleration Spectra for Inelastic Structures

Seismic design of equipment in spectra, which are often based on the assumption that the behaviour of the structure and the equipment is linear elastic. Essential reductions in peak values of floor response spectra can be behaviour of the structure is taken into account. This paper presents the most important results of an extensive parametric study of floor response spectra, taking into account the inelastic behaviour of the structure and the linear elastic behaviour of the equipment. The structure and the equipment were modelled as single-degree-offreedom set of recorded ground acceleration time influences of input ground motion, ductility, hysteretic behaviour and natural period of the structure, as well as damping of the equipment have been studied. made, a simple practiceoriented method spectrum is proposed. The method is intended for a quick estimation of approximate floor response spectra.