Stabilizing Structures - Kilby

closedlavenderUrban and Civil

Nov 25, 2013 (3 years and 11 months ago)

134 views

Chapter 5.1


A structure is stable is forces are
balanced


Unbalanced forces
cause stress
and
fatigue

in structures


Proper materials can be used to
stabilize structures


Building techniques can be used to
stabilize structures


Squares and
Rectangles are
NOT
AS STRONG AS
TRIANGLES



3
-
dimensional

triangular prisms
and pyramid shapes
are also stringer
than

3
-
dimensional
rectangular prisms



A flat structure that
is supported at each
end



If too much weight
is put on the beam,
it will bend in a
U
-
SHAPE

or even
BREAK


The shape
gives it
strength


Less weight
than solid
beams


Can support
large loads


Solid structure
that can stand
by itself


Used to
support beams
and I
-
beams


Rigid framework of
beams joined
together



Trusses are usually
in the form of
interlocking
triangles


Flat structure that
is supported at
only one end



When weight is
placed on the
other end of the
cantilever, it will
bend in an N
-
shape
to resist load



Long beams



Hollow
rectangular
prisms


Curved structure


Can support a lot
of weight


Weight is
distributed over
the supports


Spreads out the
weight


Sheets of metal
are shaped into a
series of pleats
or triangles


Corrugated is
stronger than a
flat sheet of
metal


The point at which a
body’s mass is
concentrated


Equally balanced in
all directions



Ex. Football players
spread their feet
shoulder width
apart and squat for
a 3 point stance

Depends on the



Materials


Construction


Centre of gravity



Permanent
changes to a
structure due to
the
internal

and
external forces
acting on it



Ex.
wind


A
breakdown
of a structure
due to the
internal

and
external forces
acting on it


The effect of all
the internal and
external forces
acting on a
structure over a
long period of
time


Causes the
structure to
weaken