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EXAC - SECTION 3 - FINAL PROJECT EXAM QUESTIONS WITH 100% VERIFIED SOLUTIONS!!

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EXAC - SECTION 3 - FINAL PROJECT EXAM QUESTIONS WITH 100% VERIFIED SOLUTIONS!!

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  • October 18, 2024
  • 32
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • define base shear
  • EXAC
  • EXAC
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EXAC - SECTION 3 -
FINAL PROJECT EXAM
QUESTIONS WITH
100% VERIFIED
SOLUTIONS!!
EXAC




OCTOBER 18, 2024
EVATEE

,EXAC - SECTION 3 - FINAL PROJECT EXAM
QUESTIONS WITH 100% VERIFIED
SOLUTIONS!!


What is: Design wind pressure? Answer - Design wind pressure:
Minimum design value for the equivalent static pressure on the exterior
surfaces resulting from critical wind velocity (equal to a reference wind wind
pressure measured at 33', 10m). The # is modified by a bunch of coefficients to
account for: exposure conditions, building height, wind gusts,
geometry/orientation.


Why are horizontal forces more critical than vertical ones in seismic design?
Answer - Because structures usually have considerable reserve for dealing with
additional vertical loads.


Define Base Shear. Answer - Base shear:
Minimum design value for the total lateral seismic force (assumed to act in any
horizontal direction)


Define the following: Collinear Forces, Concurrent Forces, Nonconcurrent
Forces. Answer - Collinear Forces:
Occur along straight line. Vector sum= sum of magnitude of forces acting along
same line of action.


Concurrent Forces:
Lines of action intersecting at common point. Vector sum=equivalent to, and
produces same effect on rigid body as the application of the vectors of the
several forces.

,Nonconcurrent Forces:
Lines of action that do not intersect at common point. Vector sum=single force
that would cause the same translation and rotation of a body as the set of
original forces.


What is a moment (structural forces)? Answer - Moment:
The tendency of a force to produce rotation of a body about a point or line


What is a Couple (structural forces)? Answer - Couple:
Force system of 2 equal parallel forces acting in opposite directions tending to
produce rotation but not translation


What are beams designed to do? Answer - Designed to carry and transfer
transverse loads across to supporting elements.


Define Deflection Answer - Deflection:
perp distance a spanning member deviates from true course under transverse
loading


What is the difference between a simple beam and a Fixed-End Beam? Answer
- Simple Beam:
Rests on supports at both ends - no moment resistance (ends free to rotate)


Fixed-end beam:
Both ends fixed against translation and rotation (reduced max deflection,
transferred bending stresses, increased rigidity)

, Distinguish between the following three frame types:
-Fixed Frame
-Hinged Frame
-Three Hinged Frame Answer - Fixed Frame
rigid frame connected to its supports with fixed joints (more resistant to
deflection than hinged from but also more sensitive to settlements and
thermal expansion/contraction)


Hinged Frame -
Rigid frame connected to its joints with pinned connections (pinned
connections prevent high bending stresses by allowing rotation)


Three-hinged Frame - structural assembly of 2 rigid sections connected to each
other and to its supports with pin joints (more sensitive to deflection than fixed
or hinged, 3-hinged system is least affected by support settlements and
thermal stresses - can also be analyzed as a statically determinate structure


Name 1 kind of beam for each wood, steel, and concrete, that can span >60'
(18m). Answer - Wood:
Laminated Beams (Timber)
Trusses (Timber)


Steel:
OWSJ


Concrete:
Precast Tees

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