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Structures Quiz 2

Terms in this set (27)

BATS
Bending, Axial, Torsion, Shear
Monolithic
One Piece
Sketch the cross section of a beam system.
Either a wood, steel, or concrete system.
What is spacing determined by?
The functionality of whats above it.
What does stiffness come from?
Shape.
Deeper beams are...?
Stiffer
Identify and sketch the most simple framing system.
Flat concrete slab. (Sketch should look like flush cross)
2-Way systems want to be...?
Square.
Formula for stress?
F=p/a
Sketch a member under axial stress and shear stress.
Axial: tube being pulled up or down
Shear: Tube w/horizontal force over top.
What prevents LTB?
Bracing, thickness, or above surface.
LTB
Lateral Torsional Buckling - when a load causes a beam to behave under torsion.
What do vectors have?
Magnitude and Direction
What are BATS?
Internal forces caused by external loads.
Draw a BSDD for a rectangular wood beam, wide flange beam, and t-shape beam.
See notes.
BSDD
Bending Stress Distribution Diagram
Allowable Stress Design
Method to design structures so that they are not over stressed. (See flow chart in notes)
Load resulted from Buckling
Load resulted from Bending
Axial Compressive Load
Transverse Load
Sketch three load patterns
Direct load, distributed load, built up distributed load
Analysis
Something that already exists and questions whether or not its safe.
Design
Something not existing - configuring a structure so that it is safe.
ASD -what does it apply to?
Allowable stress design - wood and steel.
USD - what does it apply to?
Ultimate strength design - concrete.
LRFD - what does it apply to?
Load resistance factor design - steel.
Three equations of equilibrium?
Fx=0
Fy=0
M=0
Beam Reactions
Externally applied loads > results in reactions at support connections > which results in equilibrium (three equations). Supports undergo internal forces (bending, shear)(Axial, torsion) which > Internal stresses (applies to above stresses) Based on Geometry > results in deformation i.e. deflection.
Allowable stress?
2/3 the yield.
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