In this paper, a new friction damper isolation system (FDIS) is
suggested for isolated nuclear power plants (NPPs). Seismic responses of
NPPs are accomplished by means of the finite element approach and
setting up a representative multi-particle model of NPPs. Results in
terms of time domain analysis show that response of structure supported
by FDIS under small seismic are correspond to fixed structure, and
perform similar properties as conventional isolated structure under
large seismic. The yield force of friction damper is one of the
important parameters which are related to responses and absorbing energy
under seismic input energy in new isolated structures. Compared with
cases of different yield level, responses of superstructures increase
respectively with yield force, while displacements of isolation layer
decrease effectively. The proposed new isolation system could be
beneficial in enhancing the seismic safety of isolated NPPs.
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» Seismic Response Analysis of Isolated Nuclear Power Plants with Friction Damper Isolation System