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Sunday, June 24, 2018

Question of the Day (25/06/2018)

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?

Thank you for participating in exercise today, remember to enter your answer in the comment section. The main aim of this exercise to stimulate knowledge of structural analysis on the internet in a fun and exciting way. We are always happy to hear from you, so kindly let us know how you feel about Structville.

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

  2. 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

    Answer is (B) = 14