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factors briefly described in Table 2.1 have been based on the "frame analogy soil amplification" (FASA)
model, as described by Lam et al (2001). The term V^is the shear wave velocity of the bedrock (ra/s).
The basis of FASA is that the amplitude of the soil spectrum (soil RSV max ) can be obtained by scaling
from RSVnuu of the corresponding rock spectrum at the natural period of the site (T s ). This modelling
concept is supported by results obtained from non-linear wave analysis and by Seld observations.
Demand Parameters
RSD max
RSV max
H
1.2
1.2
TABLE 2.1
SITE FACTOR S(T S v s( > p. ox t
a
X
4-6
4-6
0.65 + -i~< 10
10000
V
0.65 + — *£—