RigidAnalysis

RigidAnalysis(
    self,
    ky,
    a_in,
    dt,
    scale_factor=1.0,
    target_pga=None,
    method='jibson',
)

Rigid Block Analysis.

Parameters

Name	Type	Description	Default
ky	float	Critical acceleration (in g).	required
a_in	list	Ground acceleration time series (in g).	required
dt	float	Time step of the input acceleration time series (in seconds).	required
scale_factor	float	Scaling factor for the input acceleration. Default is 1.0.	1.0
target_pga	float	Target peak ground acceleration (in m/s^2). If provided, the input acceleration will be scaled to match this value. Cannot be used with scale_factor.	None
method	str	Analysis method. Options are ‘jibson’, ‘dgr’, or ‘gra’. Default is ‘jibson’.	'jibson'

Raises

Name	Type	Description
	ValueError	If both target_pga and scale_factor are provided.

Attributes

Name	Type	Description
analysis_methods	dict	Dictionary mapping method names to their corresponding functions.
ground_acc	numpy.ndarray	Ground acceleration time series (in m/s^2).

Methods

Name	Description
jibson	Calculate the downslope rigid block displacement, differential velocity, and acceleration using the Jibson method.

jibson

RigidAnalysis.jibson()

Calculate the downslope rigid block displacement, differential velocity, and acceleration using the Jibson method.

Notes

This method iteratively calculates the block’s acceleration, velocity, and displacement based on the input ground acceleration and critical acceleration.