Beam-Column

Question 1

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

Answer 1

0.7Fy

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 than an unstiffened elements in terms of local buckling

Answer 5

True

Question 6

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

Answer 6

both

Question 7

The limit for the plastic moment Mp 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 an MRF. Determine the moment magnification factor B2 if the column is not braced against side sway. Note: The column is pinned at both ends and the end moments produces reverse curvature.

Answer 10

2.22

Question 11

The interaction equation below is a

Answer 11

Linear

Question 12

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

Answer 12

Equal Areas

Question 13

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

Answer 13

Strain

Question 14

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

Answer 14

primary deflection

Question 15

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

Answer 15

less than or equal to one

Question 16

A column is a part of an MRF. Determine the moment magnification factor B1 if the column is braced against side sway. Note: The column is pinned at both ends and the end moments produces reverse curvature.

Answer 16

0.89

Question 17

What is the relative stiffness of a fixed joint

Answer 17

0

Question 18

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

Answer 18

Cb

Question 19

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

Answer 19

primary loads

Question 20

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

Answer 20

True

Question 21

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

Answer 21

one

Question 22

The yield strength of a material is based on the

Answer 22

upper

Question 23

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

Answer 23

1 < k < 20

Question 24

Shape factor is simply a ratio of

Answer 24

either

Question 25

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

Answer 25

beam

Question 26

What is the relative stiffness of a roller joint (Note roller free to move laterally

Answer 26

infinity

Question 27

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

Answer 27

False

Question 28

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

Answer 28

True

Question 29

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 29

2.0

Question 30

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

Answer 30

Moment Capacity

Question 31

For a bearing stress concept, the bearing stress per bolt considers an area equivalent to the area of the

Answer 31

Hole diameter x thickness

Question 32

Bearing failure of the plate happens prior to shearing plate failure

Answer 32

False

Question 33

Minimum distance “Lc” and minimum ctc spacing “s” is used to prevent

Answer 33

Shearing of the bolt

Question 34

The transfer of loads from one plate to the other is basically through
with the plate side hole

Answer 34

Bearing

Question 35

The main difference between the bolt and rivet is in the

Answer 35

Method of tightening

Question 36

A length correction factor ofd ______
is applied to account for the effect of length connection

Answer 36

80%

Question 37

Which of the following type of connection permits a bolt to be snug tight

Answer 37

Slip critical type

Question 38

For a simple stress concept, the shear stress per bolt considers an area equivalent to the area of
the

Answer 38

Plane Section

Question 39

When hole elongation exceeds 25° is tolerated then shearing failure of the bolt is more likely to
happen.

Answer 39

True

Question 40

The actual proof load given on tables is based on

Answer 40

stress

Question 41

Maximum distance “Lc” and maximum ctc spacing “s” is used to prevent

Answer 41

Shearing of the bolt

Question 42

Pre-compression of the plates for a riveted connection is achieved by

Answer 42

Applying heat and pressure

Question 43

Slip critical connection is basically achieve by

Answer 43

Friction between plates

Question 44

When threads are included at the shear planes the nominal strength Rn of the bolts

Answer 44

Decrease

Question 45

When hole elongation exceeds 25° is tolerated then the connection is slip critical

Answer 45

True

Question 46

For a tension stress concept, the tension stress per bolt considers an area equivalent to the area of the

Answer 46

Bolt Section

Question 47

For a slip critical connection the failure mode of the bolt is by

Answer 47

Bearing

Question 48

Hole elongation is common to connection where the failure mode is by

Answer 48

Bearing of the plate