Combination of Responses to the Different Components of Seismic Excitation for the Platform Model of the Soil-Structure System

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Rubric:     Theoretical and experimental studies   
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The author continues a set of papers about spectral seismic analysis of soil-structure systems. In this publication general approach is suggested to the combination of responses to the different components of excitation. The excitation is put on the platform in the platform model of the soil-structure system. Generally, 18 responses participate in the combination, but for the common case of symmetrical structure resting on the surface of horizontally-layered soil with vertically propagating seismic wave only five responses are to be combined.