Decoupled

Decoupled(
    self,
    ky,
    a_in,
    dt,
    height,
    vs_slope,
    vs_base,
    damp_ratio,
    ref_strain,
    scale_factor=1,
    target_pga=None,
    soil_model='linear_elastic',
    si_units=True,
    lite=False,
)

Decoupled analysis for sliding block and ground motion interaction.

Parameters

Name	Type	Description	Default
ky	float or tuple[list[float], list[float]] or tuple[np.ndarray, np.ndarray] or callable	Yield acceleration function or constant.	required
a_in	list[float] or np.ndarray	Input acceleration time history.	required
dt	float	Time step of the input acceleration.	required
height	int or float	Height of the sliding block.	required
vs_slope	int or float	Shear wave velocity of the slope.	required
vs_base	int or float	Shear wave velocity of the base.	required
damp_ratio	float	Damping ratio of the sliding block.	required
ref_strain	float	Reference strain for modulus reduction.	required
scale_factor	float	Scale factor for the input acceleration. Default is 1.	1
soil_model	str	Soil model type. Default is “linear_elastic”.	'linear_elastic'
si_units	bool	Whether to use SI units. Default is True.	True
lite	bool	Whether to use lite mode. Default is False.	False

Attributes

Name	Type	Description
k_y	callable	Yield acceleration function.
a_in	list[float] or np.ndarray	Input acceleration time history.
dt	float	Time step of the input acceleration.
height	int or float	Height of the sliding block.
vs_slope	int or float	Shear wave velocity of the slope.
vs_base	int or float	Shear wave velocity of the base.
damp_ratio	float	Damping ratio of the sliding block.
ref_strain	float	Reference strain for modulus reduction.
scale_factor	float	Scale factor for the input acceleration.
soil_model	str	Soil model type.
si_units	bool	Whether to use SI units.
lite	bool	Whether to use lite mode.
npts	int	Number of points in the input acceleration time history.
g	float	Gravitational acceleration.
unit_weight	float	Unit weight of the sliding block.
rho	float	Density of the sliding block.
mass	float	Mass of the sliding block.
max_shear_mod	float	Maximum shear modulus of the sliding block.
HEA	np.ndarray	Horizontal earthquake acceleration.
block_disp	np.ndarray	Displacement of the sliding block.
block_vel	np.ndarray	Velocity of the sliding block.
block_acc	np.ndarray	Acceleration of the sliding block.
x_resp	np.ndarray	Response displacement.
v_resp	np.ndarray	Response velocity.
a_resp	np.ndarray	Response acceleration.
max_sliding_disp	float	Maximum sliding displacement.
ground_acc	np.ndarray	Ground acceleration.