70
Question
For the plane truss shown in the figure, the number of zero force members for given loading is
For the plane truss shown in the figure, the number of zero force members for given loading is
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Solution
The correct option is D 8
Zero force member
1. If only two non-collinear member exist at a joint and no external force/reaction acts at the joint the members must be zero force member
2. If 3 members are joined at a point and two of them are collinear and also no external load acts at the joint the third member will be zero force member
where -o- = Zero force member
On the logic given above
Zero force members are
DN→ hence NC, BO hence OC → hence CR
EM, HJ, hence GJ
⇒ Total no of zero force member = 8
Zero force member
1. If only two non-collinear member exist at a joint and no external force/reaction acts at the joint the members must be zero force member
2. If 3 members are joined at a point and two of them are collinear and also no external load acts at the joint the third member will be zero force member
where -o- = Zero force member
On the logic given above
Zero force members are
DN→ hence NC, BO hence OC → hence CR
EM, HJ, hence GJ
⇒ Total no of zero force member = 8
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