Question

Classify each of the structures as statically determinate, Statically indeterminate, stable, or unstable. If indeterminate, specify the degree of indeterminacy. The supports or connections are to be assumed as stated.

Answer 1

MED 2 pin Pin 2 reactions (Rx, Ry) fixed 3 reactions (M, Ry , Rx) Degree of indeterminacy No. of reactions - Qvailable egas. = (2+3) – (3+1) = 5-4 = 1 Indeterminate structure of stable. Meo I fixed Pin Roller (3 reactions) (I reaction) M, Rx , Ry Degree of indeterminacy = No. of reactions - available equations = (3+1) - (3+1) - No. os equilibriun e 4-4 = 0 Determinate and stable shucture. ter, Roller Pinle der Roller 1 reaction (ireaction) (2 Reaction) - Ry . Rx, Ry Degree of indeterminacy = No.of reactions - available equations = (1+1+2) - 3 = 4-3 =1 Indeterminate and stable structure.