o3seespy.pattern

class o3seespy.command.pattern.MultipleSupport(osi)[source]

Bases: PatternBase

The MultipleSupport Pattern Class

The Multi-Support pattern allows similar or different prescribed ground motions to be input at various supports in the structure. In OpenSees, the prescribed motion is applied using single-point constraints, the single-point constraints taking their constraint value from user created ground motions.

Initial method for MultipleSupport

Parameters

osi (o3seespy.OpenSeesInstance) –

Examples

>>> import o3seespy as o3
>>> osi = o3.OpenSeesInstance(ndm=2)
>>> o3.pattern.MultipleSupport(osi)
op_type = 'MultipleSupport'
class o3seespy.command.pattern.PatternBase[source]

Bases: OpenSeesObject

op_base_type = 'pattern'
class o3seespy.command.pattern.Plain(osi, ts, fact: Optional[float] = None)[source]

Bases: PatternBase

The Plain Pattern Class

This commnand allows the user to construct a LoadPattern object. Each plain load pattern is associated with a TimeSeries object and can contain multiple NodalLoads, ElementalLoads and SP_Constraint objects. The command to generate LoadPattern object contains in { } the commands to generate all the loads and the single-point constraints in the pattern. To construct a load pattern and populate it, the following command is used:

Initial method for Plain

Parameters

  • osi (o3seespy.OpenSeesInstance) –

  • ts (obj) – The object of the time series to be used in the load pattern

  • fact (float, optional) – Constant factor.

Examples

>>> import o3seespy as o3
>>> osi = o3.OpenSeesInstance(ndm=2)
>>> ts = o3.time_series.Linear(osi, factor=1.0)
>>> o3.pattern.Plain(osi, ts=ts, fact=1.0)
op_type = 'Plain'
class o3seespy.command.pattern.UniformExcitation(osi, dir, disp_series=None, vel_series=None, accel_series=None, vel0: Optional[float] = None, fact: Optional[float] = None)[source]

Bases: PatternBase

The UniformExcitation Pattern Class

The UniformExcitation pattern allows the user to apply a uniform excitation to a model acting in a certain direction. The command is as follows:

Initial method for UniformExcitation

Parameters

  • osi (o3seespy.OpenSeesInstance) –

  • dir (int) – Direction in which ground motion acts #. corresponds to translation along the global x axis #. corresponds to translation along the global y axis #. corresponds to translation along the global z axis #. corresponds to rotation about the global x axis #. corresponds to rotation about the global y axis #. corresponds to rotation about the global z axis

  • disp_series (obj, optional) – Object of the timeseries series defining the displacement history.

  • vel_series (obj, optional) – Object of the timeseries series defining the velocity history.

  • accel_series (obj, optional) – Object of the timeseries series defining the acceleration history.

  • vel0 (float, optional) – The initial velocity (optional, default=0.0)

  • fact (float, optional) – Constant factor (optional, default=1.0)

Examples

>>> import o3seespy as o3
>>> osi = o3.OpenSeesInstance(ndm=2)
>>> ts = o3.time_series.Linear(osi, factor=1.0)
>>> o3.pattern.UniformExcitation(osi, dir=1, accel_series=ts, vel0=1.0, fact=1.0)
op_type = 'UniformExcitation'