QUIZ Flashcards
Given the isosceles triangle with a base b=10 and a height h=10 inches determine the plastic
modulus Z if Fy= 100 ksi
97.631
A box section is 8 times stronger than a wide flange section because
ALL ELEM. ARE
STIFFENED
. A stiffened element is more critical than an stiffened element in terms of local buckling (t/f)
FALSE
when a section behaves in the plastic mode, the neutral axis divides the section into two
EQUAL AREAS
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
THE ELEM. IS CAPABLE OF
LARGE STRAIN PRIOR TO LOCAL BUCKLING
The moment of inertia I of an isosceles triangle with respect to the centroid is
bh^3/36
The limit for the plastic moment Mp is
1.5My
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
3.536
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
20/3
Main or primary flexural members are called
beams
Lateral torsional buckling is primarily due to the lateral translation of
the COMPRESSION
FLANGE
Given the isosceles triangle with a base b=10 and a height h=10 inches determine the section
modulus S if Fy= 100 ksi
83.333
Uniformly compressed elements have no compact limits (T/F)
FALSE
Shape factor is simply a ratio of
EITHER OF THE TWO ABOVE
. Beams with continuous lateral support such as those which carry continuous slab are said to
be
LATERALLY SUPPORTED
For a simply supported beam (pin ended ) with no transvere loads and with eqaual end
moments in single curvature, the value of Cb is
1.0
The yield strength of a material is based on the
UPPER YIELD POINT
The factor that takes into account the non-uniform bending moment distribution over an
unbraced length Lb is
Cb
The yield strength of a material is based on the
UPPER YIELD POINT
The factor that takes into account the non-uniform bending moment distribution over an
unbraced length Lb is
Cb
Given the isosceles triangle with a base b=10 and a height h=10 inches determine the shape
factor if Fy= 100 ksi
1.172
The moment of inertia I of an isosceles triangle with respect to its base is
bh^3/12
The value of Fr (residual stress) for welded built-up shapes in the old AISC code is
16.5
Flexurally compressed elements have no non-compact limits (t/F)
T
For a simply supported beam (pin ended ) with no transverse loads and with eqaual end
moments in reverse curvature, the value of Cb is
1.32
Beams w/ braced length Lb greater than that required are said to be
LATERALLY
UNSUPPORTED
The number of plastic hinge is determined by the degree of indeterminacy plus
1
In the LRFD criteria for strength of flexural members, the main objective is to determine
MOMENT CAPACITY
Perfectly plastic behavior means that the material will not rupture at a specified
STRAIN
A member subjected to some degree of bending and/ or flexure is called a
BEAM
A plastic moment Is the largest moment which could be developed by the section (t/F)
TRUE
