GATE Civil Engineering (CE) 2020 Shift 1 Solved Paper

Question : 31 of 65

Marks: +1, -0

Consider the planar truss shown in the figure (not drawn to the scale)

Neglecting self-weight of the members, the number of zero-force members in the truss under the action of the load

P

, is

Solution:

Using Golden Rules -1 & 2,

No. of zero force members = 8
Idealized structure

No. of zero force members are

8 .

Using golden rules 1 and 2 we can find 0 forces.
No. of zero force members are "8"
As displacement between "A"

\&{ }^{\;\text "" "\;} {B}^{' '}

points in vertical direction is

=0

, i.e.

∆ {AB}=0

,
Resisting force

= {F}_{ {AB}}=0

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