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Question
What is a zero force member in a truss? With examples state the conditions for a zero force member.
Solution
1. In engineering mechanics, a zero force member is a member (a single truss segment) in a truss which, given a specific load, is at rest that is it is neither in tension, nor in compression
2.The conditions for a zero force member are :
(a)In a truss,at a joint there are only three members of which two are collinear and if the joint has no external load then the non collinear members is a zero force member.
e.g.: DF is a zero force member in the given figure.
(b) In a truss,if at an unsupported joint there are only two members and if the joint has no external load then both the members are zero force members.
e.g.:DE and EF are zero force members in the given figure.
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RELATED QUESTIONS
Referring to the truss shown in the figure. Find :
(a) Reaction at D and C
(b)Zero force members.
(c)Forces in member FE and DC by method of section.
(d)Forces in other members by method of joints.
In the truss shown in figure,compute the forces in each member.
A truss is loaded and supported as shown.Determine the following:
(1)Identify the zero force members,if any
(2)Find the forces in members EF,ED and FC by method of joints.
(3)Find the forces in members GF,GC and BC by method of sections
