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P-δ is a local effect associated with axial load on displacement relative to element chord extending between end nodes. Figure 1 illustrates the influence of P-δ on a simply supported beam. Here, a transverse distributed load ω correlates with elastic bending-stiffness properties KE to induce vertical displacement δ. An additional flexural contribution comes from the relationship between this deformed configuration and axial load P. The geometric stiffness properties KG which dictate this relationship are discussed further in Dr. Edward L. Wilson's text Wiki Markup
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Cantilevered column P-δ
Now, when observing P-δ effect on a cantilevered column, response is shown in Figure 2:
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- Wilson, E. L. (2004). Static and Dynamic Analysis of Structures (4th ed.). Berkeley, CA: Computers and Structures, Inc.
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