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Find the Degree of Static Indeterminacy of the following structures??


Problem 1



Solution: Problem 1

For information on the formula and theory look Understanding static Indeterminacy
  • Method 1


Degree of external indeterminacy = Ds = r - 3 = 4 -3 = 1

Degree of Internal indeterminacy = Dsi = m- (2j-3) = 6- (2 x 4 -3) = 1

Degree of static indeterminacy = Ds= Dse + Dsi = 1 + 1 = 2


  • Method 2


For a plane frame, the static indeterminacy can be given by the equation

Ds = (m + r) - 2j = (6 +4 ) - ( 2 x 4) = 2

Hence the static indeterminacy Ds = 2;

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