Axial Force in Structure with No Parallel Force

AI Thread Summary
Axial force can exist in a structural member even when no parallel force is applied, particularly when a load is applied perpendicular to the member. In the case of a simply supported beam with a vertical load, compressive forces develop on one side of the neutral axis while tensile forces emerge on the opposite side. These horizontal forces generate a moment that helps resist the perpendicular load. Therefore, the interaction of forces within the beam illustrates the presence of axial forces despite the absence of direct parallel loads. Understanding these dynamics is crucial for accurate structural analysis and design.
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Does axial force exist in a member of a structure where no force acts parallel to the member?
 
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a force is applied perpendicular to the member
 
I think an example of what you're referring to would be a simply supported beam (horizontal) with a load applied perpendicular to the neutral axis (verticle). In that case, there is a compressive load on one side of the neutral axis and a tensile load on the opposite side of the neutral axis. So basically there are horizontal forces in the beam that create a moment to resist the load acting perpendicular to the beam.
 

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