Linear Oscillator Response Spectra with Pendulum Seismic Isolators

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Rubric:     Seismic safety and seismic isolation of buildings   
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Pendulum isolators are widely used for seismic isolation of structures with rigid framing schemes. The existing design methods are based on the assumption of a linear relationship between the restoring force and displacement, this being justified for small displacements. The paper proposes the method for the nonlinear system analysis based on a simple pendulum model. The response spectra of seismo-isolated linear oscillators for actual accelerograms are calculated.