vertical stresses 2.0 Flashcards
When soil is subjected to a vertical load, such
as a foundation, ________ are created in the soil
stresses
The stresses spread _________ with depth
laterally
is the ratio of deformation
to length and has nothing to do with working out.
strain
Soil is considered ‘‘_______________or is described as
exhibiting ‘‘near-linear elastic behavior. * There is a limit to near-linear elastic behavior
quasi-elastic
__________developed an equation to model stress
distribution with depth for a homogeneous,
isotropic material (modulus of elasticity and
poissons ratio constant in all directions)
Boussinesq
(__________and
____________ constant in all directions)
modulus of elasticity and
poissons ratio
If you need the stress under a rectangular footing,
but you need it at a point other than the corner or
center, you would use __________
superposition
By creating a series of _______________shapes in the area
needed, you can sum the calculated stresses to
obtain the total stress at that point
rectangular
in line loads The strain at any point P in the Y-direction parallel to
the line load is assumed equal to _____
zero.
________ is the same at all sections and the shear stresses on
these sections are zero.
XZ-plane
is a line which connects all points of equal stress below
the ground surface.
isobar
In other words, an isobar is a _________.
sress contour
Since these isobars form closed figures and resemble the
form of a bulb, they are also termed b______________ or simply
the ____________. *
bulb of pressure or simply
the pressure bulb.
The depth of this stressed zone may be termed as the _______________________ which is responsible for the settlement of the structure.
significant
depth (Ds)
The depth Ds is approximately equal to ___ times the width of square
or circular footings
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