2) The following figure in the next page shows the geological and shear wave velocity profile of the Alameda Naval Air Station. Assume the total unit weight of the Old Bay Clay layer is 22.1 kN/m3 , and the groundwater table is at a depth of 7.5 m. Plot the total vertical stress, effective vertical stress, and pore water pressure versus depth for the Alameda Naval Air Station up to the bottom of the Old Bay Clay layer. S Velocity (m/sec) 100 200 300 400 500 600 SAND WATNIOAL F YT = 17 kN/m3 CLAY HOLOCENE BAY MUOI YT = 13 kN/m³ TTAND TO LOAMY SAND MERAITT SANDI YT = 19 kN/m³ ELOAMY SAND, wee beos o SLTY CLAY Vr = 21 kN/m³ SETY CLAY ESTOCENE BAY MUO Old Bay Clay 50 - FI SANDY LOAM GAAVELLY SAND CLAY LOAM TO SLTY CLA CLAY 100 AUSTOCENE ALLUV CLAY LOAM CLAY ECLAY LOAM SAND SANDY CLAY LOAM CRAVELLY SAND SHALE E AN ASTAE 150 Alameda Naval Air Station S-wave velocity profiles with dashed lines representing plus and minus one standard deviation. The statistics are done on the slope (reciprocal velocity) so that some of the limits will not appear symmetrical. Simplified geologic log is shown for correlation with velocities. from U.S. Geological Survey Open-File Report 92-287, "Seismic Velocities and Geologic Logs from Borehole Measurements at Seven STrong-Motion Stations that Recorded the 1989 Loma Prieta Earthquake" Depth (meters)

Structural Analysis
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Chapter2: Loads On Structures
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2) The following figure in the next page shows the geological and shear wave velocity profile of the
Alameda Naval Air Station. AsSsume the total unit weight of the Old Bay Clay layer is 22.1 kN/m3 , and
the groundwater table is at a depth of 7.5 m. Plot the total vertical stress, effective vertical stress, and
pore water pressure versus depth for the Alameda Naval Air Station up to the bottom of the Old Bay
Clay layer.
S Velocity (m/sec)
100
200
300
400
500
600
|Yr = 17 kN/m³
YT = 13 kN/m³
SAND
ARTIFICIAL FILLU
CLAY
HOLOCENE
MUDI
SAND TO LOAMY SAND
MERAITT SANOI
YT = 19 kN/m³
LOAMY SAND, w n beds o SLTY CLAY
STY CLAY
Vr = 21 kN/m³
MESTOCENE BAY MUỜI
Old Bay Clay
50-
FINE SANDY LOAM
GRAVELLY SAND
CLAY LOAM TO SILTY CLAY
F CLAY
100 -
LEISTOCENE ALLUVIUM
CLAY LOAM
CLAY
CLAY LOAM
SAND
SANDY CLAY LOAM
GRAVELLY SAND
SHALE
TRA SCANASSEMLAGE
150 -
Alameda Naval Air Station
S-wave velocity profiles with dashed lines representing plus and minus one
standard deviation. The statistics are done on the slope (reciprocal velocity) so that some
of the limits will not appear symmetrical. Simplified geologic log is shown for correlation
with velocities.
from U.S. Geological Survey Open-File Report 92-287, "Seismic
Velocities and Geologic Logs from Borehole Measurements at
Seven STrong-Motion Stations that Recorded the 1989 Loma Prieta
Earthquake"
Depth (meters)
Transcribed Image Text:2) The following figure in the next page shows the geological and shear wave velocity profile of the Alameda Naval Air Station. AsSsume the total unit weight of the Old Bay Clay layer is 22.1 kN/m3 , and the groundwater table is at a depth of 7.5 m. Plot the total vertical stress, effective vertical stress, and pore water pressure versus depth for the Alameda Naval Air Station up to the bottom of the Old Bay Clay layer. S Velocity (m/sec) 100 200 300 400 500 600 |Yr = 17 kN/m³ YT = 13 kN/m³ SAND ARTIFICIAL FILLU CLAY HOLOCENE MUDI SAND TO LOAMY SAND MERAITT SANOI YT = 19 kN/m³ LOAMY SAND, w n beds o SLTY CLAY STY CLAY Vr = 21 kN/m³ MESTOCENE BAY MUỜI Old Bay Clay 50- FINE SANDY LOAM GRAVELLY SAND CLAY LOAM TO SILTY CLAY F CLAY 100 - LEISTOCENE ALLUVIUM CLAY LOAM CLAY CLAY LOAM SAND SANDY CLAY LOAM GRAVELLY SAND SHALE TRA SCANASSEMLAGE 150 - Alameda Naval Air Station S-wave velocity profiles with dashed lines representing plus and minus one standard deviation. The statistics are done on the slope (reciprocal velocity) so that some of the limits will not appear symmetrical. Simplified geologic log is shown for correlation with velocities. from U.S. Geological Survey Open-File Report 92-287, "Seismic Velocities and Geologic Logs from Borehole Measurements at Seven STrong-Motion Stations that Recorded the 1989 Loma Prieta Earthquake" Depth (meters)
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