def test_meyerhof_and_hanna_capacity_strong_clay_over_weak_sand():
# STRONG CLAY OVER WEAK SAND
length = 1000000000.0 # actually a strip in
width = 1.0
depth = 0.0
fd = geofound.create_foundation(length=length, width=width, depth=depth)
phi_0 = 0.0
cohesion_0 = 85.0
unit_dry_weight_0 = 16.5
sl_0 = geofound.create_soil(phi=phi_0,
cohesion=cohesion_0,
unit_dry_weight=unit_dry_weight_0)
phi_1 = 17.0
cohesion_1 = 0.0
unit_dry_weight_1 = 17.0
sl_1 = geofound.create_soil(phi=phi_1,
cohesion=cohesion_1,
unit_dry_weight=unit_dry_weight_1)
h0 = 1 # m, height of the crust layer
geofound.capacity_meyerhof_and_hanna_1978(sl_0, sl_1, h0, fd, verbose=0)
assert np.isclose(fd.q_ult, 187.87,
rtol=0.001), fd.q_ult # no independent validation
def test_meyerhof_and_hanna_capacity_strong_sand_over_weak_clay():
# STRONG SAND OVER WEAK CLAY
length = 1000000.0 # actually a strip in
width = 1.0
depth = 0.0
fd = geofound.create_foundation(length=length, width=width, depth=depth)
phi_0 = 34.0
cohesion_0 = 0.0
unit_dry_weight_0 = 17.0
sl_0 = geofound.create_soil(phi=phi_0,
cohesion=cohesion_0,
unit_dry_weight=unit_dry_weight_0)
phi_1 = 0.0
cohesion_1 = 30.0
unit_dry_weight_1 = 17.0
sl_1 = geofound.create_soil(phi=phi_1,
cohesion=cohesion_1,
unit_dry_weight=unit_dry_weight_1)
h0 = 1.5 # m, height of the crust layer
geofound.capacity_meyerhof_and_hanna_1978(sl_0, sl_1, h0, fd, verbose=0)
assert np.isclose(fd.q_ult, 264.74, rtol=0.001), fd.q_ult
def test_meyerhof_and_hanna_capacity_sand_over_sand_gwl():
# STRONG SAND OVER WEAK SAND
length = 1000000.0 # actually a strip in
width = 4.0
depth = 1.5
fd = geofound.create_foundation(length=length, width=width, depth=depth)
phi_0 = 34.0
cohesion_0 = 0.0
unit_dry_weight_0 = 18000
sl_0 = geofound.create_soil(phi=phi_0, cohesion=cohesion_0, unit_dry_weight=unit_dry_weight_0)
sl_0.unit_sat_weight = 20000
phi_1 = 34.0
cohesion_1 = 0.0
unit_dry_weight_1 = 18000
sl_1 = geofound.create_soil(phi=phi_1, cohesion=cohesion_1, unit_dry_weight=unit_dry_weight_1)
sl_1.unit_sat_weight = 20000
h0 = 3.0 # m, height of the crust layer
# Case 1: GWL at surface
gwl = 0.0
q_ult_meyerhof = geofound.capacity_meyerhof_1963(sl_0, fd, gwl=gwl)
geofound.capacity_meyerhof_and_hanna_1978(sl_0, sl_1, h0, fd, gwl=gwl, verbose=0)
correction = 1.07
corrected_2layer = fd.q_ult * correction
assert np.isclose(corrected_2layer, q_ult_meyerhof, rtol=0.01), (corrected_2layer, q_ult_meyerhof / 1000)
# Case 2: GWL at between foundation depth and surface
gwl = 0.5
q_ult_meyerhof = geofound.capacity_meyerhof_1963(sl_0, fd, gwl=gwl)
geofound.capacity_meyerhof_and_hanna_1978(sl_0, sl_1, h0, fd, gwl=gwl, verbose=0)
correction = 1.07
corrected_2layer = fd.q_ult * correction
assert np.isclose(corrected_2layer, q_ult_meyerhof, rtol=0.01), (corrected_2layer, q_ult_meyerhof / 1000)
# Case 3: GWL at between foundation depth and foundation depth plus width, and GWL < layer 1 depth
gwl = 1.8
q_ult_meyerhof = geofound.capacity_meyerhof_1963(sl_0, fd, gwl=gwl)
geofound.capacity_meyerhof_and_hanna_1978(sl_0, sl_1, h0, fd, gwl=gwl, verbose=0)
correction = 1.07
corrected_2layer = fd.q_ult * correction
assert np.isclose(corrected_2layer, q_ult_meyerhof, rtol=0.01), (corrected_2layer, q_ult_meyerhof / 1000)
# Case 4: GWL at between foundation depth and foundation depth plus width, and GWL > layer 1 depth
gwl = 4.8
q_ult_meyerhof = geofound.capacity_meyerhof_1963(sl_0, fd, gwl=gwl)
geofound.capacity_meyerhof_and_hanna_1978(sl_0, sl_1, h0, fd, gwl=gwl, verbose=0)
correction = 1.03
corrected_2layer = fd.q_ult * correction
assert np.isclose(corrected_2layer, q_ult_meyerhof, rtol=0.01), (corrected_2layer, q_ult_meyerhof / 1000)
# Case 5: GWL beyond foundation depth plus width
gwl = 20.
q_ult_meyerhof = geofound.capacity_meyerhof_1963(sl_0, fd, gwl=gwl)
geofound.capacity_meyerhof_and_hanna_1978(sl_0, sl_1, h0, fd, gwl=gwl, verbose=0)
correction = 1.07
corrected_2layer = fd.q_ult * correction
assert np.isclose(corrected_2layer, q_ult_meyerhof, rtol=0.01), (corrected_2layer, q_ult_meyerhof/1000)
def test_karamitros():
# Load ground motion
fpath = TEST_DATA_DIR + "input_acc.his"
acc_file = np.loadtxt(fpath, skiprows=4)
acc = acc_file[:, 1]
# define the soils and soil profile
sl_0 = sm.Soil()
sl_0.phi = 0
sl_0.cohesion = 50000
sl_0.unit_dry_weight = 19600
sl_0.unit_sat_weight = 21000
sl_1 = sm.Soil()
sl_1.phi = 33.
sl_1.cohesion = 0
sl_1.unit_dry_weight = 19700
sl_1.unit_sat_weight = 21000
soil_profile = sm.SoilProfile()
soil_profile.add_layer(0, sl_0)
soil_profile.add_layer(4.0, sl_1)
soil_profile.gwl = 2.
# Define a foundation
length = 1000000.
fd = sm.Foundation()
fd.length = length
fd.width = 10.0
fd.depth = 0.0
q = 80000 # applied load
z_c = lqs.cal_z_c(fd, z_liq=4, h0=2)
vertical_effective_stress = soil_profile.get_v_eff_stress_at_depth(z_c)
phi_deg = lqs.calc_degraded_phi(sl_1.phi, vertical_effective_stress, q=q)
assert np.isclose(phi_deg, 9.9275389), phi_deg # Not validated
sl_1.phi = phi_deg
q_ult = gf.capacity_meyerhof_and_hanna_1978(sl_0,
sl_1,
h0=2,
fd=fd,
verbose=0)
assert np.isclose(q_ult, 107350.07398), q_ult # Not validated
dt = 0.005
sett_dyn = lqs.karamitros_settlement(fd,
z_liq=4,
q=80000,
q_ult=q_ult,
acc=acc,
dt=dt)
assert np.isclose(
sett_dyn, 0.03242937,
rtol=0.001), sett_dyn # 0.03242937 Not validated, liquepy 0.1.11
