12. An aluminium (E = 70 GPa) column built into the ground has length, L = 3.0 m, and is under axial compressive load P, as shown in the figure below. The dimensions of the cross-section are b = 200 mm and d = 300 mm. Determine (a) the critical load to buckle the column, (b) the allowable buckling load if the factor of safety is 2.0. P L Id b

12. An aluminium (E = 70 GPa) column built into the ground has length, L = 3.0 m, and is under axial compressive load P, as shown in the figure below. The dimensions of the cross-section are b = 200 mm and d = 300 mm. Determine (a) the critical load to buckle the column, (b) the allowable buckling load if the factor of safety is 2.0. P L Id b

Steel Design (Activate Learning with these NEW titles from Engineering!)

6th Edition

ISBN:9781337094740

Author:Segui, William T.

Publisher:Segui, William T.

Chapter5: Beams

Section: Chapter Questions

Problem 5.5.8P

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Concept explainers

Methods to Determine Vertical Stress

The load applied to the soil is transferred to the underground. The presence of water at soil pores and solid grains above the soil are the primary components that are responsible for the effective load transfer. Due to the load acting, the internal component of the soil or the underground formations undergoes deformations or a tectonic shift. The amount of deformation depends upon the amount of load acting on the soil surface, which indeed, depends on the weight of everything present above the soil. Due to this, the underground soil element develops internal stresses which try to resist the tectonic changes.

Question

12. An aluminium (E = 70 GPa) column built into the ground has length, L = 3.0 m, and
is under axial compressive load P, as shown in the figure below. The dimensions of the
cross-section are b = 200 mm and d 300 mm. Determine (a) the critical load to buckle
the column, (b) the allowable buckling load if the factor of safety is 2.0.
=
P
L
b
I
d

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