Redundant truss - Condition (n > 2j - R)

Q.  If n > 2j – R, then the truss is called as _________.  
(n = number of joints, j = number of members, R = number of reaction components)
- Published on 18 Sep 15

a. perfect truss
b. redundant truss
c. deficient truss
d. none of the above

ANSWER: redundant truss

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    Discussion

  • savarnika   -Posted on 06 Jun 16
    n+R>2j-it means truss contains more number of members than needed to be ridid it mean it is over rigid and statically indeterminate n+r<2j -it means trusscontains less number of members than needed to be rigid it means it is under rigid ,collapsible
  • Sravanthi   -Posted on 16 Dec 15
    - Trusses are of two different types: Perfect and imperfect truss.

    - Imperfect truss is further classified as redundant truss and deficient truss.

    - The condition for redundant truss is n > 2j – R

    here (n = number of joints, j = number of members, R = number of reaction components)

    - The condition for deficient truss is n < 2j – R
  • Manik Anand   -Posted on 03 Dec 15
    here n=no. of members and j is the no. of joints.

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