Chapter 7 Serviceability of Beams

Question 1

Even if the beam has adequate resistance with regard to lateral torsional buckling and local buckling, to achieve the plastic moment strength…

Answer 1

the actual limit state will still be failure by lateral torsional buckling, compression flange buckling, or web buckling, but in the plastic range instead of the elastic range

Question 2

When the yield stress is reached at the extreme fiber the nominal moment is then referred to as__________ whose formula is _________

Answer 2

Yield Moment

M_n =M_y = S_x*F_y

Question 3

When the yield stress is reached at every other fiber whose strain is larger than or equal to ε_y =F_y/E_s the nominal moment is then referred to as__________ whose formula is _________

Answer 3

Plastic moment

M_n =M_y = Z_x*F_y

Question 4

When beams have adequate lateral stability of the compression flange, the only stability limit state that might prevent achieving maximum moment strength is…

Answer 4

Local buckling

Question 5

Once the strain ε reaches ε_y increasing strain…

Answer 5

induces no increase in stress

Question 6

When the yield stress is reached at the extreme fiber, the nominal moment strength M_n is referred to as

Answer 6

the yield moment.

Question 7

Plastic moment equation

Answer 7

M_N = F_yZ

Question 8

Long beams are governed by

Answer 8

Deflection

Question 9

Medium beams are governed by

Answer 9

Flexural strength

Question 10

Medium beams are governed by