Seismic hazard analysis in Santo Domingo City Team 4 Report.

Seismic hazard analysisin

Santo Domingo City

Team 4Report

• Study area• Geological setting• HVSR technique• ReMi, Masw and Spac techniques• Final discussion

Outline

Team Members

Pablo Rocio Fernando

VenezuelaHondurasDominican Rep.

Team Members

Junior

Haiti

Lidia

Honduras

Norberto

Puerto Rico

Heriberto

Dominican Rep.

Study Area

Profile 1Profile 2

Profile 3

Profile 4Profile 5

Profile 6

Geological setting of Santo Domingo

Stratigraphic column

HVSR technique

H/V data acquisition

Geology (Team 4 HVSR study area)

H/V station deployments

H/V Results:

2.60 s

Station SD03_p2-p3(1508_9282_202)

4.02 s

Station SD06_p3-p4(1526_92F1_202)

?? ?

H/V Results:

Station SD02_p3-p4(1349_92F1_202)

Station SD03_p3-p4S

(1410_949A_202)

4.32 Secs

3.70 Secs

?

?

H/V Results:

Station SD07_p3-p4 (1550_949A_202)

Station SD04_p2-p3(1532_950C_202)

3.71 Secs 2.38 Secs

?? ?

H/V Results:

Station SD01A_p3-p4 (1300_92F1_202)

Station SD01B_p3-p4 (1308_949A_202)

0.28 Hz 3.58 Secs

0.27 Hz 3.70 Secs

??

Isoperiods Map (seconds)

ReMi and Masw techniques

ReMi and Masw data acquisition

Location for ReMi, Spac and Masw surveys

Mirador sur Av.

Mirador del Sur park

Remi and Masw Line 1Remi Line 2

Spac 1Spac 2

Remi Line 3

Remi velocity model Line 2

Dispersion model Line 2

Soil Characterization near to ReMi 2

Soil Classification DR Seismic Code

727 m

Remi Model Line 3

Dispersion curve for Line 3

65.5

m

Last

13.

5 m

Limestone!

Borehole S-4

Vs = 2083 m/s

Vs = 1261 m/s

Vs = 978 m/s

Vs = 795 m/s

Dispersion curveRMS error: 26.623 m/sVs = 909.136 m/sIBC class site B

Line 3 Remi Model

MASW Line 1 results

MASW Line 1 results

Spac technique

Location for Spac survey No. 2

Mirador sur Av.

Mirador del Sur park

Remi and Masw Line 1Remi Line 2

Spac 1Spac 2

Remi Line 3

Spac survey No. 2 ground model

• HVSR results have a good relationship with the geological environment of deposition (alluvial fal, prodelta), that is the reason because we got high predominant period peaks.

• Remi, Masw and Spac techniques revealed a high velocity layering structure, validated by 8 boreholes drilled near from the team’s study site.

• Remi line 2 could be defined as a Class C site (360-760 m/s, Stiff Soil- standard designs - NERHP).

• Remi lines 3 could be defined as a Class B site (760-1500 m/s, Soft Rock- low-hazard design - NERHP).

Conclusions

Thanks you so much!