FORCED VIBRATION TESTS AND SIMULATION ANALYSES OF A NUCLEAR-REACTOR BUILDING

Forced vibration tests were carried out at the Hamaoka (BWR) Unit 4 R/ B (reactor building) in Japan in April and May of 1992. Fundamental dy namic characteristics of the R/B were obtained, including its interact ion with the adjacent T/B (turbine building) and the soil-structure in teraction. Results for the preceding R/Bs are compared, and probable c auses for fluctuations in the resonance curve around the Ist peak are discussed. Furthermore, simulation analyses of the fundamental dynamic characteristics of the soil-structure system were conducted, using a basic lumped-mass soil-structure model (lattice model), and strong cor relation with the measured data was obtained. Other detailed simulatio n models were employed to investigate the effects of simultaneously in duced vertical response and response of the adjacent turbine building on the lateral response of the reactor building. (C) 1998 Elsevier Sci ence S.A. All rights reserved.