FLEXURAL MEMBERS - Eds

Question 1

Given the isosceles triangle with a base b=10 and a height h=10 inches determine the plastic modulus Z if Fy= 100 ksi

Answer 1

97.631

Question 2

A box section is 8 times stronger than a wide flange section because ____

Answer 2

All elements are stiffened

Question 3

TRUE OR FALSE

A stiffened element is more critical than an stiffened element in terms of local buckling

Answer 3

False

Question 4

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

Answer 4

equal areas

Question 5

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 ratio to ensure that ______

Answer 5

the element is capable of large strain prior to local buckling

Question 6

The moment of inertia (I) of an isosceles triangle with respect to the centroid is _____

Answer 6

bh^3/36

Question 7

The limit for the plastic moment Mp is ____

Answer 7

1.5My

Question 8

Given the isosceles triangle with a base b=10 and a height h=10 inches determine the location of its plastic centroid from the top

Answer 8

3.536

Question 9

Given the isosceles triangle with a base b=10 and a height h=10 inches determine the location of its geometric centroid from the top

Answer 9

20/3

Question 10

Main or primary flexural members are called _____

Answer 10

beams

Question 11

Lateral torsional buckling is primarily due to the lateral translation of _________

Answer 11

the compression flange

Question 12

Given the isosceles triangle with a base b=10 and a height h=10 inches determine the section modulus S if Fy= 100 ksi

Answer 12

83.333

Question 13

TRUE OR FALSE

Uniformly compressed elements have no compact limits

Answer 13

False

Question 14

Shape factor is simply a ratio of ____

Answer 14

either of the two above

Question 15

Beams with continuous lateral support such as those which carry continuous slab are said to be ________

Answer 15

Laterally supported

Question 16

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

Answer 16

1.0

Question 17

The yield strength of a material is based on the _____

Answer 17

upper yield point

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

Given the isosceles triangle with a base b=10 and a height h=10 inches determine the shape factor if Fy= 100 ksi

Answer 19

1.172

Question 20

The moment of inertia I of an isosceles triangle with respect to its base is ________

Answer 20

bh^3/12

Question 21

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

Answer 21

16.5

Question 22

TRUE OR FALSE

Flexurally compressed elements have no non-compact limits

Answer 22

True

Question 23

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

Answer 23

1.32

Question 24

Beams w/ braced length Lb greater than that required are said to be ____

Answer 24

Laterally unsupported

Question 25

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

Answer 25

1

Question 26

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

Answer 26

Moment Capacity

Question 27

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

Answer 27

Strain

Question 28

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

Answer 28

Beam

Question 29

TRUE OR FALSE

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

Answer 29

TRUE