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Boundary Change Assignment

A class for managing Boundary Change Assignment.

Constructor

BoundaryChangeAssignment(bSPT = False, bSPR = False, bGSPR = False, bCGLINK = False, bSSSF = False, bPSSF = False, bRLS = False, bWSSF = False, bESSF = False, bCDOF = False, vBOUNDARY = None, ST_load_assignments = None, MV = None, SM = None, THRSEV = None, PO = None, THNS = None, ULAT = None)

Creates a boundary change assignment for managing boundary conditions and load analysis settings. Command: /db/bcct

Parameters

Support Options

  • bSPT (default=False): Support
  • bSPR (default=False): Point Spring Support
  • bGSPR (default=False): General Spring Support
  • bCGLINK (default=False): Change General Link Property
  • bSSSF (default=False): Section Stiffness Scale Factor
  • bPSSF (default=False): Plate Stiffness Scale Factor
  • bRLS (default=False): Beam End Release
  • bWSSF (default=False): Wall Stiffness Scale Factor
  • bESSF (default=False): Element Stiffness Scale Factor
  • bCDOF (default=False): Constrain DOF associated with specified displacements/Settlements by boundary group combinations

Boundary Settings

  • vBOUNDARY (default=None): List of boundary assignments in format [["L1", "BG2"], ["L2", "BG1"]]

Load Analysis Settings

  • ST_load_assignments (default=None): List of ST type load cases with BGCNAME assignments in format [["Self-weight", "L1"], ["SIDL", "UNCHANGED"]]

Load Analysis Settings for Other Types

  • MV (default=None): Boundary group name for Moving Load analysis
  • SM (default=None): Boundary group name for Settlement analysis
  • THRSEV (default=None): Boundary group name for Time History Response Spectrum Envelope analysis
  • PO (default=None): Boundary group name for Pushover analysis
  • THNS (default=None): Boundary group name for Time History Nonlinear Static analysis
  • ULAT (default=None): Boundary group name for User Defined Load analysis

Object Attributes

  • ID (int): The ID of the boundary change assignment (always 1).
  • bSPT (bool): Support setting.
  • bSPR (bool): Point Spring Support setting.
  • bGSPR (bool): General Spring Support setting.
  • bCGLINK (bool): Change General Link Property setting.
  • bSSSF (bool): Section Stiffness Scale Factor setting.
  • bPSSF (bool): Plate Stiffness Scale Factor setting.
  • bRLS (bool): Beam End Release setting.
  • bWSSF (bool): Wall Stiffness Scale Factor setting.
  • bESSF (bool): Element Stiffness Scale Factor setting.
  • bCDOF (bool): Constrain DOF setting.
  • vBOUNDARY (list): Processed boundary data in JSON structure format.
  • vLOADANAL (list): Processed load analysis data combining user input with system load cases.

Class Attributes

  • data (list): Static list containing all BoundaryChangeAssignment instances.

Examples

# Basic boundary change assignment
BoundaryChangeAssignment(
    bSPT=True,
    bCDOF=True,
    vBOUNDARY=[["L1", "BG2"], ["L2", "BG1"]],
    ST_load_assignments=[["Self-weight", "L1"]],
    MV="L1"
)

# Complex assignment with multiple load types
BoundaryChangeAssignment(
    bSPT=True,
    bSPR=False,
    bGSPR=False,
    vBOUNDARY=[["L1", "BG2"], ["L2", "BG1"]],
    ST_load_assignments=[["Self-weight", "L1"], ["SIDL", "L2"]],
    MV="L1",
    SM="L2",
    THRSEV="L1"
)

# Assignment with multiple support options
BoundaryChangeAssignment(
    bSPT=True,
    bSPR=True,
    bGSPR=True,
    bCDOF=True,
    vBOUNDARY=[["Construction1", "BoundaryGroup1"], ["Construction2", "BoundaryGroup2"]],
    ST_load_assignments=[["Dead Load", "Construction1"], ["Live Load", "Construction2"]],
    MV="Construction1",
    SM="UNCHANGED",
    PO="Construction2"
)