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## Sunday, June 24, 2018

Structville daily questions
From now henceforth, Structville will be publishing daily questions on different aspects of civil engineering. You are expected to enter your response in the comment section. At the end of every week, exceptional participants will stand a chance to win some gifts. This exercise is open to participants all over the world.

Today's Question
What is the degree of static indeterminacy of the frame shown above?

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1. B) 14. 3*5. --1=14. Ans

2. Faisal (29-15 = 14 ) so answer is B) 14

3. Ajit Kumar MohantyJune 25, 2018 at 9:43 AM

For a 2D frame like this,
Degree of static indeterminacy,Ds = External indeterminacy(Dse) + Internal indeterminacy(Dsi)

Dse = Re - 3
Dsi = 3C - Rr

Where, Re = Total no.of External reaction = 4 * 3 = 12
C = Total no.of closed loops = 2
Rr = Internal hinge contribution = Summation of (No.of connecting members meeting at hinge - 1) = 2 - 1 = 1

Therefore, 4*3-3 + 3(2)-1= 14