Block Format Keyword This property is used to define the truss property set.


(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
/PROP/TYPE2/prop_ID/unit_ID or /PROP/TRUSS/prop_ID/unit_ID
Area Gapini            


Field Contents SI Unit Example
prop_ID Property identifier

(Integer, maximum 10 digits)

unit_ID Unit Identifier

(Integer, maximum 10 digits)

prop_title Property title

(Character, maximum 100 characters)

Area Initial cross section


[ m 2 ]
Gapini Initial gap

Default = 0 (Real)

[ m ]


  1. For truss elements, if ν 0 the cross section variation is computed as:(1)
    A r e a t = A r e a t d t ( 1 + v ε ˙ x d t ) 2

    Where, υ is the Poisson's ratio given in the material law.

  2. The truss is activated only if:(2)
    L e n g t h t r u s s c u r r e n t < L e n g t h t r u s s i n i t i a l G a p i n i

    The current distance between truss nodes is smaller than the initial length minus Gapini.

  3. Gapini should be Gapini > 0. Negative Gapini. will be treated as 0. The truss will not be activated in tensile.