Geoscience Reference
In-Depth Information
PGA set1
PGA set2
Synthetic
N
W
E
S
2.2-2.4g
2.0-2.2g
1.8-2.0g
1.6-1.8g
1.4-1.6g
1.2-1.4g
1.0-1.2g
0.8-1.0g
0.6-0.8g
0.4-0.6g
0
1
2
kilometres
)
spectral accelerations usingtwosetsof PGA scaled real and one set of simulated
acceleration input motion
Fig. 4.3. Microzonation of Zeytinburnu withrespect toshort period
(
T
=
0
.
2s
0.6
0.4
0.2
0
0.6
0.4
0.2
0
0.6
0.4
0.2
0
1061NS
1062EW
SIMULATED
−
0.2
−
0.2
−
0.2
−
0.4
−
0.4
−
0.4
−
0.6
−
0.6
−
0.6
0
10
20
30
0
10
20
30
0
10
20
30
0.6
0.4
0.2
0
0.6
0.4
0.2
0
0.6
0.4
0.2
0
531EW
GBZ000
SIMULATED
−
0.2
−
0.2
−
0.4
−
−
0.2
−
0.4
−
−
0.4
−
0.6
0.6
0.6
0
10
20
30
0
10
20
30
0
10
20
30
0.6
0.4
0.2
0
−
0.2
−
0.6
0.4
0.2
0
−
0.2
−
0.6
0.4
0.2
0
−
0.2
−
GBZ270
375EW
SIMULATED
0.4
0.4
0.4
−
0.6
−
0.6
−
0.6
0
10
TIME (sec)
20
30
0
10
TIME (sec)
20
30
0
10
TIME (sec)
20
30
Fig. 4.4. Two sets of scaled real and one set of simulated acceleration records used
for siteresponse analyses for one cell
In the case of real acceleration records, it could be preferable to conduct site response
analyses using large sets of data to eliminate the differences observed between different
setsasshowninFigure4.3.Onealternativeistoadoptaprobabilisticinterpretationforall
elasticaccelerationspectrawithpredefinedexceedanceprobabilitytocalculatetheelastic
acceleration spectratobe used for microzonation and for vulnerability assessment.
