SOLUTIONS TO PROBLEMS - Geotechnical Earthquake Engineering - page 562

6.5

CSR 0.65 r d v 0

a max

___
v 0

____

g Eq. (6.6)

0.65 (0.96) (1.35) (0.40) 0.34

Using Eq. (5.3), for q c 3.9 MPa, q cl 5.8 MPa. Per Fig. 6.8, for q cl 5.8 MPa, inter-
secting clean sand curve, CRR 0.09, and

FS CRR

CSR 0.09

_____ ____

0.34 0.26

6.6

CSR 0.65 r d v 0

a max

___
v 0

____

g Eq. (6.6)

0.65 (0.96) (1.35) (0.40) 0.34

43 kPa, then V sl 185 m/s. Per Fig. 6.8,
for V sl 185 m/s, intersecting clean sand curve, and CRR 0.16

Using Eq. (6.9) with V s 150 m/s and v 0

FS CRR

CSR 0.16

_____ ____

0.34 0.47

6.7

CSR 0.65 r d v 0

a max

___
v 0

____

g Eq. (6.6)

0.65 (0.96) (1.35) (0.40) 0.34

Crushed limestone has more than 50 percent gravel-size particles with about 11 percent
fines. Given plasticity characteristics (liquid limit 18 and plasticity index 7), use silty

gravel curve in Fig. 6.9. For q cl 5.0 MPa and intersecting silty gravel curve, CRR 0.18.

CRR 0.18

_____ ____

FS

CSR 0.34

0.53

6.8

CSR 0.65 r d v 0

a max

___
v 0

____

g Eq. (6.6)

0.65 (0.96) (1.35) (0.40) 0.34

Silty gravel has more than 50 percent gravel-size particles with about 10 percent fines.
Given plasticity characteristics (liquid limit 23 and plasticity index 3), use silty gravel
curve in Fig. 6.9. For q cl 7.5 MPa and intersecting silty gravel curve, CRR 0.27.

FS CRR

CSR 0.27

_____ ____

0.34 0.79