a. Calculate the critical slenderness ratio of the W section if the column is braced at midpoint of the weak axis b. Calculate the compressive capacity of built-up section using ASD and LRFD c. Calculate the demand-capacity factor, Is the section adequate?
a. Calculate the critical slenderness ratio of the W section if the column is braced at midpoint of the weak axis b. Calculate the compressive capacity of built-up section using ASD and LRFD c. Calculate the demand-capacity factor, Is the section adequate?
Steel Design (Activate Learning with these NEW titles from Engineering!)
6th Edition
ISBN:9781337094740
Author:Segui, William T.
Publisher:Segui, William T.
Chapter8: Eccentric Connections
Section: Chapter Questions
Problem 8.3.9P
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Question
![A W21 x 57 of A992Gr50 steel column having length of 6 m and is fixed at both ends.
(Gr50 steel = 50 ksi = 345 MPa = Fy) is used to carry a load of 900 kN dead load and 400 kN live
load. Note: Use NSCP 2015
Properties of W21 x 57
A 10800 mm
d = 536 mm
bf = 167 mm
tr = 16.5 mm
tw 10.3 mm
Kdes
rx = 212 mm
Ry = 34.3 mm
= 29.2 mm
a. Calculate the critical slenderness ratio of the W section if the column is braced at midpoint of the weak
axis
b. Calculate the compressive capacity of built-up section using ASD and LRFD
c. Calculate the demand-capacity factor, Is the section adequate?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe777b9e5-d4eb-4bce-9215-223234f4c7d9%2F4b45465f-bba5-43a5-aa63-88593b19c508%2Fukf6tr_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A W21 x 57 of A992Gr50 steel column having length of 6 m and is fixed at both ends.
(Gr50 steel = 50 ksi = 345 MPa = Fy) is used to carry a load of 900 kN dead load and 400 kN live
load. Note: Use NSCP 2015
Properties of W21 x 57
A 10800 mm
d = 536 mm
bf = 167 mm
tr = 16.5 mm
tw 10.3 mm
Kdes
rx = 212 mm
Ry = 34.3 mm
= 29.2 mm
a. Calculate the critical slenderness ratio of the W section if the column is braced at midpoint of the weak
axis
b. Calculate the compressive capacity of built-up section using ASD and LRFD
c. Calculate the demand-capacity factor, Is the section adequate?
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