Civil Engineering Reference
In-Depth Information
0.08
0.06
j
= -17
j
= -13
0.04
j
= -9
j
= -5
j
= -1
0.02
j
= 3
10
50
0
40
30
-10
20
10
-20
0
Figure 3.7
Squared wavelet coefficients after ground motion characterization for the
Loma Prieta (1989) acceleration data for specific frequency bands.
3.5.3 Validation - structural response
A right circular, cylindrical water storage tank structure made of steel with
a thick foundation is assumed to be rigidly attached to the ground surface.
Hence, the rocking effects of vibration as well as any soil-structure inter-
action effects may be ignored. The tank is subjected to a random ground
vibration. The tank contains water to its full height and has no top cover.
0.6
Wavelet
TH simulation
0.5
0.4
0.3
0.2
0.1
0
0.01
0.1
1
10
Time Period (s)
Figure 3.8
Comparison of PSA spectra obtained from time history simulation and wave-
let analysis corresponding to 1% damping in the system.
