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Response Spectrum Case

Constructor

To create section offset parameters, use the Offset constructor.

RS.ModalCombination(combType='CQC', bAddSign=False , AddSignType=0 , ModeShapeFactor=None )

Constructs Modal Combination control

Parameters

  • combType: Modal combination method used to combine modal responses.
         'CQC'   |   'SRSS'   |   'ABS'   |   'Linear'

  • bAddSign: Enables signed results for modal combination.

  • AddSignType: Vertical offset option
         0 : Along Major Mode Direction   |   1 : Along Absolute Maximum Value
  • ModeShapeFactor: Optional. List of scale factor corresponding to modes.

Damping Control

Constructor

RS.Damping.Modal(dampRatioAllMode=0.05)

Constructs Damping control with Modal damping

Parameters

  • dampRatioAllMode: Damping ratio for all modes. Default is 0.05 (5% damping).

Mass and Stiffness Proportional Damping

Constructor

RS.Damping.MassStiffness(inpType=1 , massProp=None , stiffProp=None , freq1=0 , damp1=0 , freq2=0 , damp2=0)

Constructs Damping control with Modal damping

Parameters

  • inpType: Damping input method/type.
         1 : Direct Specification   |   2 : Calc. from Modal Damping
  • massProp: Mass proportional damping coefficient.
  • stiffProp: Stiffness proportional damping coefficient.
  • freq1: First reference frequency for damping calculation.
  • damp1: Damping ratio corresponding to freq1.
  • freq1: Second reference frequency for damping calculation.
  • damp1: Damping ratio corresponding to freq2.

Strain Energy Proportional Damping

Constructor

RS.Damping.StrainEnergy()

Constructs Damping control with Strain Energy Proportional damping

Case

Constructor

RS.Case(name , direction="XY" , excitation_angle=0 , scale_factor=1 , period_modify_factor = 1 , spectrum_functions=['RS_FUNC'] , interpolation='LINEAR', modal_combination_control=None , damping_control=None , bDampCorrection=False , desc='', id=None)

Constructs Damping control with Modal damping

Parameters

  • name: Name of the response spectrum load case.
  • direction: Excitation direction for seismic loading.
  • excitation_angle: Rotation angle of excitation in degrees.
  • scale_factor: Scale multiplier applied to the response spectrum.
  • period_modify_factor: Time period modification factor.
  • spectrum_functions: List of assigned response spectrum function names.
  • interpolation: Interpolation method between spectrum data points.
  • modal_combination_control: Modal combination control object.
  • damping_control: Damping control object.
  • bDampCorrection: Enables damping correction for the response spectrum.
  • desc: Description of the response spectrum case.
  • id: Manually assign an ID. If None, ID will be auto-assigned.

Examples

RS.Function.India(name="EQX_RS", code="IS1893(2002)", soilType="Hard", zone="IV")
RS.Function.create()

RS.Case("EQ_X",'XY',0,
        spectrum_functions=['EQX_RS'],
        modal_combination_control=RS.ModalCombination('CQC',True),
        damping_control=RS.Damping.Modal(0.05),
        bDampCorrection=True)
RS.Case.create()