(Choose best ansr) (A) Pin/roller supports resist ____________________. rotation
ID: 1860288 • Letter: #
Question
(Choose best ansr)
(A) Pin/roller supports resist ____________________.
rotation
displacement
rotation and displacement
none of the above
(B) Inflection points occur where ____________________.
displacement equals zero
displacement is at a maximum
curvature equals zero
curvature is at a maximum
(C) Curvature (1/%u03C1) has units of ________________.
a. distance-1
b. distance
c. distance2
d. distance3
(D) Boundary conditions reflect a known _____________________. Boundary conditions usually are found at _____________.
value of slope/displacement at a given point; supports
value of slope/displacement at a given point; concentrated external loads
relationship between slope/displacement at two different points; supports
relationship between slope/displacement at two different points; boundaries between
equations defining the slope/displacement along a beam
none of the above
(E) Continuity conditions reflect a known _____________________. Continuity conditions usually are found at _____________.
value of slope/displacement at a given point; supports
value of slope/displacement at a given point; concentrated external loads
relationship between slope/displacement at two different points; supports
relationship between slope/displacement at two different points; boundaries between
equations defining the slope/displacement along a beam
none of the above
(F) Theconstantsofintegrationrepresent
The initial slope/displacement of the function at the beginning of its applicable domain
The flexural rigidity of the beam
The area underneath the displacement curve
None of the above
(G) To determine the elastic curve equations for a statically indeterminate beam, the internal moment must be expressed in terms of ____________________.
unknown redundant support reactions
itself
boundary conditions
none of the above
(H) Unknown support reactions will _________ be solvable using boundary conditions and/or continuity conditions.
never
sometimes
always
none of the above
(I) Once the unknown redundant reactions are solved for, the moment function can be determined by using ________________.
the method of sections and statics
calculus
trial and error
none of the above
(J) The number of redundant support reactions required is equal to the _____________________ the system.
number of equations required to describe the internal moment in
number of supports minus one in
degree of indeterminacy of
none of the above
(A) The %u201Ccritical load%u201D for a column is ______________________________.
the lateral load required to buckle a column
the yield strength of a column
the maximum tensile axial load that a column can support while on the verge of
buckling
the maximum compressive axial load that a column can support while on the verge of
buckling
(B) A column is made of a material with a yield stress of 50 ksi. If the buckling stress is calculated to
be 75 ksi, which failure mode will occur first?
a. yielding
b. buckling
c. fracture
d. none of the above
(C) A designer wants to increase the buckling resistance of a fixed-fixed column. Which of the following would not increase Pcr?
change the supports/fixity
change to a material with a higher modulus of elasticity
change to a section with a larger moment of inertia
brace the column at an intermediate point
(D) About which axis will a column buckle?
the axis with the least moment of inertia
the axis with the largest effective slenderness ratio
the axis with the least fixity
none of the above
Explanation / Answer
(A)
rotation and displacement
(B)
curvature equals zero
(C)
b. distance
value of slope/displacement at a given point; concentrated external loads
(E)
relationship between slope/displacement at two different points; supports
(F)
The flexural rigidity of the beam
(G) boundary conditions
never
(I) s
calculus
number of equations required to describe the internal moment in
(A)
the lateral load required to buckle a column
b. buckling
change to a material with a higher modulus of elasticity
(D)
the axis with the largest effective slenderness ratio
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