Question

Select a light W shape for a column subjected to an axial compressive load of 1623kN. The unbraced length of column is 5m and the ends are pinned. Use A36 grade steel.

Answer #1

A short reinforced concrete column is subjected to a 700 kips
axial compressive load. The modulus of elasticity of plain concrete
and steel are 4,500,000 psi and 29,000,000, respectively, and the
cross-sectional area of steel is 3.0% of that of the reinforced
concrete. Considering the column as a structural member made of a
composite material and subjected to load parallel to the steel
bars. Calculate the modulus of elasticity of the reinforced
concrete, as well as how much load is...

(30 pts) A short reinforced concrete column is
subjected to a 1000 kN axial compressive load. The moduli of
elasticity of plain concrete and steel are 25 GPa and 207 GPa,
respectively, and the cross-sectional area of steel is 2% of that
of the reinforced concrete. Considering the column as a structural
member made of a composite material and subjected to load parallel
to the steel rebars, calculate the following:
a. the modulus of elasticity
of the reinforced concrete
b....

10.3.B) Determine the maximum factored axial compression
load
for a W 12 × 120 column with an unbraced height of 22 ft if both
ends are
fixed against rotation and horizontal movement.
use A996 steel with Fy = 50 ksi.

A
sturdy column with a hollow rectangle shape is made of steel. 150mm
length and 70mm width, thickness of steel=6mm.
E=200Gpa
-what is the max slenderness ratio if the column is pinned at
both ends 3m long?
-what is the critical load if the column is pinned at both
ends and is 3m?
-what is critical load if the column is fixed at both ends and
is 7m?

A column is made of concrete and reinforced with a W-section
steel with an area of 2000 mm2. The dimension of the column is
300mm x 350mm. The column is subjected to an axial load of 100 kN.
What will be the deformed length of the column? Use Es =
200 GPa and Ec = 25 GPa.

A
W12x40 column has a height of 28 m and is pinned at both ends.
Check whether it can support a dead axial load of 65 kips and a
live load of 150 kips. Consider KL of 14 ft and use A572 Grade 60
steel.

Select a lightest W-Shape section with an unbraced length of 10
ft that can carry a maximum moment of 168 ft-kips. Neglect the
moment gradient (Cb=1)using AISC Steel Manual
.

Select the lightest section to support a axial load (DL=500 kips y
LL= 300 kips). The element is 30 ft length and braced in the y
direction at 14 ft from the column base. The end support conditions
are (fixed/pinned). Justify the material’s selection (Verify
slenderness and local buckling)

A hollow circular steel column 2m long and outer diameter 200
mm carries an axial load of 325 kN. If the compressive stress is
150 MPa, lateral strain for external diameter is is 0.000325 and
Poisson’s ratio is 0.3, find the minimum wall thickness required
for the column. Also calculate the shear modulus for the material
of the column. Take E = 210 GPa.

Select the lightest available W12 shape (A992) to support a
factored axial load of 650 kips and a factored uniform transverse
load of 1.0 kip/ft. Bending takes place about the strong axis only.
The member length is 20 ft. and K = 1.0 typically. Sidesway is
prevented.

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