Beams with axial loads
Consider the case where a beam has both an axial
load and a bending moment. If the axial load passes through the neutral axis
for pure bending, the axial load will not contribute to additional bending and
one can consider the loading as a linear superposition of pure bending and
uniform extension.
Eccentric axial load:
If the axial load is applied such that its line
of action is not on the neutral surface for pure bending, then this axial load
results in bending. Such an eccentric load can be replaced by an equivalent
that is on the neutral surface and bending moment as shown in the figure.
Once
the equivalent system is constructed, then one can use the above method of
superposition to calculate the stress.
ã Mehrdad Negahban and the University of Nebraska, 1996-2000.
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Department of Engineering Mechanics, University of Nebraska, Lincoln, NE 68588-0526
Last modified at: 9:04
AM,
Monday, March 06, 2000