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Theory of Structures

Q1:

The force in BC of the truss shown in the given figure, is

A 3.0t compression

B 3.0t tension

C
t tension

D
t compression

E None of these.

ANS:C -

t tension

We can also solve by the truss method.

i.e., the bc member is pcotθ where θ is 30°.

And more ever CD is a zero-member hence we get a symmetrical structure so the reaction is equal.

Now the value of p we get is 1.5 and cotθ= √(3). So answer we get is (3/2)*√(3)



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