Classify each of the structures shown in Fig 13 as staticall

Classify each of the structures shown in Fig. 1-3 as statically determinate, statically inagy.

Solution

a) Structure is stable and it is Statically determinate. Degree of indeterminacy is (3+2-3-1-1) = 0.

b) Structure is stable and it is Statically indeterminate. Degree of indeterminacy is (3+3-3-1) = 2.

c) Structure is stable and it is Statically indeterminate. Degree of indeterminacy is (2+2+1-3-1) = 1.

d) Structure is horizontally unstable and it is Statically indeterminate. Degree of indeterminacy is (2+2-3) = 1.

e) Structure is stable and it is Statically indeterminate. Degree of indeterminacy is (2+3-3-1) = 1.

f) Structure is stable and it is Statically determinate. Degree of indeterminacy is (3+1-3-1) = 0.