39 Study of Human-Structure Dynamic Interactions 395 Fig. 39.4 Vibration tests with human subjects and concrete blocks 3 4 5 6 7 8 9 10 0 0.2 0.4 0.6 0.8 1 1.2 x 10−3 Frequency (Hz) Acceleration FRF (g/N) Without Human Standing Sitting Bent Knees Weights Fig. 39.5 Comparison of the floor drive point FRF without people and with 24 people in different postures and the equivalent concrete blocks
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