Question

Question 1. Classify each of the structures shown in Figure 1 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. (10 marks) Pored Roller Pin (a) Pin Roller (b)

Answer 1

o number of members m=4 number of Joints j = 5 number of support reactions 8. 3+1 +26 number members meeting o'z 2 at hy brid saints of degree of statie en deteroninary Ds = 3m- (31-r)-r' (325-01-2 - לא 3 = 12-11 The I degree and is unstable due to formation of mechanism given foome is statically es determinate to

of number members = m = number of joints = s j- 7 number Support reactions. 7 = 2+1=3 of degree of static eiderhinocy Dya (23-8) from- (23-v)} D 's a m. - 11-(217-3 - The structure is statically determinate and stable.