QUIZ 4 STEEL (PART 1)

Question 1

The value of Fr (residual stress) for welded built-up shapes in the old AISC code is

Answer 1

0.7Fy / 16.5

Question 2

For a simply supported beam (pin ended) with no transverse loads and with equal end moments in single curvature, the value of Cb is

Answer 2

1

Question 3

For a simply supported beam (pin ended) with no transverse loads and with equal end moments in reverse curvature, the value of Cb is

Answer 3

1.32

Question 4

The number of plastic hinge is determined by the degree of indeterminacy plus

Answer 4

1

Question 5

A stiffened element is more critical that an unstiffened elements in terms of local buckling

Answer 5

False

Question 6

A compact section satisfies the condition that the width-thickness ratio of a plate elements shall not exceed the limit for width to thickness ratio to ensure that

Answer 6

both

Question 7

The limit for the plastic moment is

Answer 7

1.5My

Question 8

Flexurally compressed elements have no non-compact limits

Answer 8

False

Question 9

A moment-resisting frame or a beam-column frame is said to be braced if there is no

Answer 9

sidesways or lateral translation

Question 10

A column is a part of MRF. Determine the moment magnification factor B2 if the column is not braced against sidesway.

NOTE: the column is pinned at both ends and the end moments produces reverse curvature.

Answer 10

2.22

Question 11

When a section behaves in the plastic mode, the neutral axis divides the section into two

Answer 11

Equal areas

Question 11

The interaction equation below is
(Pq/Pr + Mq/Mr) < 1.0

Answer 11

Linear

Question 12

Perfectly plastic behavior means that the material will not rupture at a specified

Answer 12

Strain

Question 13

In a beam-column, a secondary moment is caused by the

Answer 13

Primary deflection

Question 14

The AISC value for Cm shown below is a modification which must always be

Answer 14

Less than or equal to one

Question 15

A column is a part of MRF. Determine the moment magnification factor B1 if the column is not braced against sidesway.

NOTE: the column is pinned at both ends and the end moments produces reverse curvature.

Answer 15

0.89

Question 16

What is the relative stiffness of a fixed joint

Answer 16

0

Question 17

The factor that takes into account the non-uniform bending moment distribution over an unbraced length Lb is

Answer 17

Cb

Question 18

In a beam-column, a primary moment is caused by the

Answer 18

Primary loads

Question 19

Moment magnification may not be required if second order analysis is used

Answer 19

True

Question 20

A member of a structure is safe if the ratio of the P load with the resistance R is less than or equal to

Answer 20

one

Question 21

The yield strength of a material is based on the

Answer 21

Upper yield point

Question 22

The range of values of the effective length factor k for sway frame is

Answer 22

1 < k <20

Question 23

Shape factor is simply a ratio of

Answer 23

either

Question 24

A member subjected to some degree of bending and/or flexure is called

Answer 24

beam

Question 25

What is the relative stiffness or a roller joint (roller free to move laterally)

Answer 25

infinity

Question 26

Cm=1 is a conservative value for braced and unbraced frame

Answer 26

False

Question 27

A plastic moment is the largest moment which could be developed by the section

Answer 27

True

Question 28

What is the effective length factor k of a column fixed at one end and roller (free to move laterally) at the other end

Answer 28

2.0

Question 29

In the LRFD criteria for strength of flexural members, the main objective is to determine

Answer 29

moment capacity