Conventional Earthquake Response Estimation Technique for Mechanical Appendage Structure System : Proposition of Floor Response Amplification Factor

Abstract

A practical conventional technique whereby earthquake response of the mechanical appendage system-pipings, tanks, electrical and mechanical equipment-supported by the primary supporting system installed on nuclear power plants and other industrial facilities can be approximately estimated is proposed and discussed Basic response properties for the appendage system can be represented by the proposed floor response amplification factor (FRAF) in this technique. This factor depicts the ratio of the maximum response of the appendage system to the response spectrum for the supporting system and can be conventionally drawn upon tripartite diagram for engineering use and its statistical characteristics are investigated. This technique can be applied to a nonelastic case where the restoring force-deformation relation for the appendage system can be simplified as a perfectly-elastoplastic model and its applicable range is investigared.