FLEXURAL MEMBERS - Marry Flashcards
TRUE OR FALSE
A plastic moment is the largest moment which could be developed by the section.
TRUE
TRUE OR FALSE
Moment magnification may not be required if first order analysis is used.
TRUE
For a simply supported beam (pin ended) with no transverse loads with equal end moments in single curvature, the value of Cb is ______.
1.0
The limit for the plastic moment Mp is _____
1.5My
The AISC Value for Cm shown below is a modification which must always be ______.
Cm = 0.60 + 0.40 (M1/m2)
Less than or equal to 1
When a section behaves in the plastic mode, the neutral axis divides the section into two ________
Equal Areas
The interaction equation below is a ______.
PQ/PR + MQ/MR ≤ 1.0
Linear
Shape factor is simply a ratio of
Either of the two:
Mp/My or Z/S
In a beam-column, a primary moment is caused by the _______
Primary loads
What is the relative stiffness of a roller joint (Note: Roller free to move laterally)?
Infinity (ꝏ)
The yield strength of a material is based on the ______
Upper yield point
A compact section satisfied 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 __________
The element is capable of large plastic strains prior to local buckling
TRUE OR FALSE
Uniformly compressed elements have no compact limits.
FALSE
The value of Fr (residual stress) for welded built-up shapes in the old AISC Code is ______
16.5 Ksi
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.
M1=10 kN-m, M2=20 kN, Pu/Pe=0.55
0.89
In the LRFD criteria for strength of flexural members, the main objective is to determine ____
Moment Capacity
A member or structure is safe if the ratio of the load P with the resistance R is less than or equal to ______.
1
A moment resisting frame or a beam-column frame is said to be braced if there is no ______.
Side sway of lateral translation
For a simply supported beam (pin ended) with no transverse loads with equal end moments in reverse curvature, the value of Cb is ______.
Cb = 1.32
Perfectly plastic behavior means that the material will not rupture at a specified ________.
Strain
In a beam-column, a secondary moment is caused by the ________
Primary deflection
A member subjected to some degree of bending and/or flexure is called a ________
Beam
TRUE OR FALSE
Flexurally compressed elements have non-compact limits.
False
The number of plastic hinge is determined by the degree of indeterminacy plus ______
1
TRUE OR FALSE
Moment magnification may not be required if second order analysis is used.
True
What is the effective length factor K of a column fixed at one end and roller (Free to move laterally) at the other end?
2
A frame without lateral loads will have no side sway for sure.
False
The factor that takes into account the non-uniform bending moment distribution over an unbraced length Lb is _____
Cb
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.
M1= 10 kN-m, M2=20 kN, Pu/Pe=0.55
2.22
What is the relative stiffness of a fixed joint?
0
TRUE OR FALSE
A stiffened element is more critical than unstiffened element in terms of local buckling.
True
The range of values of the effective length factor K for sway frame is ______.
1 ≤ 𝑘 ≤ 20
TRUE OR FALSE
Cm=1 is a conservative value for braced and unbraced frame.
True
