Stabilizing Structures - Kilby

Urban and Civil

Nov 25, 2013 (5 years and 4 months ago)

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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

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

Long beams

Hollow
rectangular
prisms

Curved structure

Can support a lot
of weight

Weight is
distributed over
the supports

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
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