Can Zero Force Members Be Ignored in Structural Analysis?

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SUMMARY

The discussion confirms that zero force members, such as IJ and IL, can be ignored in structural analysis once identified. Specifically, when analyzing point J, IJ is recognized as a zero force member due to the presence of two collinear members, allowing it to be disregarded. This principle applies similarly at point I, where IL can also be treated as a zero force member. The elimination of these members simplifies the analysis without affecting the overall structural integrity.

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  • Understanding of structural analysis principles
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  • Knowledge of collinear forces in trusses
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jghlee
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Homework Statement



So when it comes to finding the zero force members, am I correct in assuming that any member previously eliminated will cease to act as a member for a point?

http://img402.imageshack.us/img402/603/47362170.th.jpg

so for example we know that IJ is a zero force member because when we view it via point, J, it's obvious that there's 2 colinear members and the third is an extra. But if we now move to point I, can I essentially delete IJ and completely ignore that it's there? so that I can get another situation where there's 2 colinear members and and the third extra (IL)?

Homework Equations





The Attempt at a Solution

 
Last edited by a moderator:
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Yes, you are correct, both IJ and IL are zero force members (there are others also).
 

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