ASCE Structural Engineering and Materials 4

Question 1

Which expression gives the Euler critical buckling load of a column?

Accepted Answer

π²EI/(KL)²

Answer

The Euler load is Pcr = π²EI/(KL)².

Question 2

What is the specified minimum yield strength of ASTM A992 steel, the standard for W-shapes?

Accepted Answer

50 ksi

Answer

A992 has Fy = 50 ksi and Fu = 65 ksi.

Question 3

Lateral-torsional buckling capacity of a steel W-beam depends most directly on which parameter?

Accepted Answer

Unbraced length of the compression flange (Lb)

Answer

AISC F2 lowers flexural strength as Lb grows past Lp and again past Lr.

Question 4

What is the fixed-end moment at each support of a fixed-fixed beam under uniform load w over span L?

Accepted Answer

wL²/12

Answer

Each fixed-end moment is wL²/12, and the midspan moment is wL²/24.

Question 5

In the moment distribution method, what is the carry-over factor to a far end that is fixed (prismatic member)?

Accepted Answer

0.5

Answer

For a prismatic member, half of the moment applied at the near end carries over to a fixed far end.

ASCE - American Society of Civil Engineers Certification Practice Test