Environmental Engineering Reference
In-Depth Information
Peak Ground Acceleration Recurrence
using Sadigh & others 1997 Attenuation
10
Mw 0.0 and above
Mw 2.0 and above
Mw 3.0 and above
Mw 4.0 and above
Mw 5.0 and above
1
0.1
PGA
(g)
0.01
0.001
0.01
0.1
1
10
100
1000
10000
100000
Return Period (Years)
Figure 12.5.
Peak ground acceleration versus annual exceedance probability (AEP) and earthquake
magnitude for a typical site in Australia.
fault 2
MCE 6.0
fault 3
MCE 6.5
project site
fault 1
MCE 7.0
PLAN VIEW
Figure 12.6.
Plan of a project site and potentially active faults for assessment of seismic hazard.
The duration of the earthquake and the period of oscillations are dependent on the
magnitude of the earthquake and the effect on the dam is dependent on these factors
as well as maximum accelerations, therefore more than one earthquake may have to
be used in analysis;
(e) For a probabilistic approach, determine the annual probability versus earthquake mag-
nitude for each fault. For example, for the situation in Figure 12.6.
Fault
Annual exceedance probability
Earthquake magnitude
1
0.01
5.5
0.001
6.5
0.0001
7.0(MCE)
2
0.01
5.0
0.001
6.0(MCE)
3
0.01
5.5
0.001
6.5(MCE)
