1. A frame ABC shown in Figure 2 consists of a tension member AB and a compression member BC. Member BC is a circular steel pipe (modulus of elasticity is 200 GPa) with outside diameter do = 90 mm and length L = 3.5 m. It is fixed at the base and pinned at the top. If a horizontal force H = 150 KN acts at joint B, determine the minimum wall thickness of member BC that would provide a factor of safety of 3 against buckling. Assume that buckling may occur in the plane of the figure. H B A 。 .d;
1. A frame ABC shown in Figure 2 consists of a tension member AB and a compression member BC. Member BC is a circular steel pipe (modulus of elasticity is 200 GPa) with outside diameter do = 90 mm and length L = 3.5 m. It is fixed at the base and pinned at the top. If a horizontal force H = 150 KN acts at joint B, determine the minimum wall thickness of member BC that would provide a factor of safety of 3 against buckling. Assume that buckling may occur in the plane of the figure. H B A 。 .d;
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Transcribed Image Text:1. A frame ABC shown in Figure 2 consists of a tension member AB and a compression member BC.
Member BC is a circular steel pipe (modulus of elasticity is 200 GPa) with outside diameter do = 90
mm and length L = 3.5 m. It is fixed at the base and pinned at the top. If a horizontal force H = 150
kN acts at joint B, determine the minimum wall thickness of member BC that would provide a factor
of safety of 3 against buckling.
Assume that buckling may occur in the plane of the figure.
H
A
60°
B
A
A
c
L
Figure 2
-d₂
✓
Section A-A
90 mm
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