pybtls.bridge.influence_line.InfluenceLine#

class InfluenceLine(IL_type)[source]#

Bases: object

An InfluenceLine instance in Python stores the data for creating a CInfluenceLine instance in C++.

All length units are in m.

Parameters:: IL_type (Literal["discrete","built-in"]) – Influence line type.

Methods

Set influence line data.

set_IL(**kwargs)[source]#

Set influence line data.

Keyword Arguments:

discrete (For) –
- position : Union[list,np.ndarray]
  
  Discrete influence line position (X).
- ordinate : Union[list,np.ndarray]
  
  Discrete influence line ordinate (Y).
- compress_tolerance : float, optional
  
  The maximum relative error (0.001~0.1) allowed for a discrete influence line to be simplified (to boost simulation).
  
  The default is None.
built-in (For) –
- type : Literal[1,2,3,4,5,6,7,8,9]
  
  Built-in influence line type.
  
  What the number represents:
  
  (The support numbering starts from the left side.)
  
  1: The mid-span sagging BM of a simply supported beam.
  
  2: The 2nd support hogging BM of a two-span continuous beam.
  
  3: The 1st support SF of a simply supported beam.
  
  4: The 2nd support SF of a simply supported beam.
  
  5: The 3rd support SF of a two-span continuous beam.
  
  6: The 1st support SF of a two-span continuous beam.
  
  7: The total weights of vehicle being on the beam.
  
  8: The 2nd support hogging BM of a three-span continuous beam.
  
  9: The 3rd support hogging BM of a three-span continuous beam.
  
  (Beams’ first and last supports are pin.)
- length : float
  
  Built-in influence line length.

Return type:

None.