Question

determine the adequacy of a 12-ft long W12x40 column in a braced
frame to resist a factored axial load of 120 kips and factored
moments of 125ft-kips and 55ft-kops about the x and y axis,
redpectively. The column is assumed to be painted at both ends. Use
ASTM A992 steel.

Answer #1

A W14x500, A992 42 ft column in a braced frame with a
compressive dead load of 90 kips and a live load of 270 kips.
Maintaining a live load to dead load ratio of 3, determine the
maximum live and dead load second-order moments that can be applied
about the strong axis on the upper end when the lower end is pinned
by (a) LRFD and (b) ASD [8.14-5]

A 14ft pin-ended column in a braced frame must carry a
compressive dead load of 65 kips and live load of 130 kips, along
with a uniformly distributed transverse dead load of 0.5 kips/ft
and live load of 2.5 kips/ft. Will a W12x58, ASTM A992 member be
adequate if the transverse load is applied to put bending about the
strong-axis? LRFD.

A 12 ft long W12x106 (A992) beam-column is in a braced frame,
supporting the following service loads and end moments:
PD = 90 kip; PL = 130 kip; Mx,D =
75 kip-ft; Mx,L = 125 kip-ft; My,D = 25
kip-ft; and My,L = 40 kip-ft; where the moments are due
to transverse loading. Assume K = 1.0 (TYP) and Cb = 1.0,
investigate if the member is satisfactory as per the 2016 AISC
LRFD.

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.

2. (a) A braced column which is 300 mm
square is restrained such that it has an
effective height of 4.5 m. Classify the
column as short or slender.
(b) The column supports:
(1) an ultimate axial load of 500 kN
and a bending moment of
200 kNm, or
(2) an ultimate axial load of 800 kN
and bending moments of 75 kNm
about the x-axis and 50 kNm
about the y-axis.
Design the longitudinal steel for both
load cases...

An A992 W21×111 is used as a column in a building to support a
dead load of 120 kips and a live load
of 300 kips. The column effective length is 22 ft for the y-axis
and 33 ft for the x-axis. Determine whether the column
will support the load by LRFD.

Determine the maximum factored axial compression load for a W 12
X 45 column with an un-Braced height of 14 ft. consider the
following:
K = 1
Fy = 50
530
322
335
559

Determine the maximum factored axial compression load for a W12
x 72 column with and unbraced height (both axis) of 18 foot.
Rotation and translation is fixed at the bottom and top of the
column.
Group of answer choices
813 kips
729 kips
547 kips
678 kips

Determine if the following column is long or short, and then
determine the critical load on a steel column having a rectangular
cross section, 12mm by 18mm and a length of 250 mm. It is fixed on
both ends and made from a steel that has the following properties:
E= 209 Gpa and sy = 290 Mpa.
Slenderness ratio = ___________ Cc = _______ Long or short
column = ___________ Critical load = ____________________
Newtons

1. (a) Explain the difference between
columns which are short and slender
and those which are braced and
unbraced.
(b) Calculate the ultimate axial load
capacity of a short-braced column
supporting an approximately
symmetrical arrangement of beams
assuming that it is 500 mm square
and is reinforced with eight
20 mm diameter bars. Assume that
fcu = 40 N/mm2, fy = 500 N/mm2 and
the concrete cover is 25 mm. Design
the shear reinforcement for the
column.
2. (a) A...

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