Types of Bridges/ Parts

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25 Νοε 2013 (πριν από 3 χρόνια και 9 μήνες)

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By

Mr. Yersak

Types of Bridges/ Parts

Objectives



Gain an understanding of the different types of bridges
and structures.



Understand and apply how to design a bridge that may
become successful and efficient.



Apply common bridge knowledge when designing and
constructing a full scale prototype bridge to scale the
pond.

Review with Peer

1.
What is the purpose of a bridge?


2.
What types of bridges are there out
around the world?


3.
Name a bridge anywhere around the
world. Explain its overall structure.






What is a bridge?

What is a bridge?


A bridge is a structure built to
span a road, valley, body of
water or obstacle that may
block passage.









What types of bridges are
there?

Types of Bridges

1.
Beam

2.
Arch

3.
Truss

4.
Suspension

5.
Cantilever

6.
Cable
-
Stayed









Beam Bridge

Beam Bridge


A firm horizontal structure that rests on two
piers, one at each end.


The weight of the bridge and any traffic on it is
directly supported by the piers with a downward
force.









Span Range:
Short

Arch Bridge

Arch Bridge


A semi
-
circular structure with
abutments

on each of the two
ends.


The semicircle diverts the weight from the bridge deck to the
abutments
.










Span Range:
Short

Abutments


Points where two
structures or objects
meet.








Arch Bridge

Truss Bridge

Truss Bridge


A connected bridge with a solid deck and a lattice
of pin
-
jointed or gusset
-
joined girders for the
sides.


These sides are composed of triangular units that
are connected at joints, called nodes.









Span Range:
Short
to Medium

Truss Bridge

Gusset Plates

Suspension Bridge

Suspension Bridge


A suspension bridge is one
when cables are strung across
the span and the deck is
suspended from these cables.



These cables are strung along
by two tall towers which help
to support most of the weight
.








Span Range:
Medium to Long

Suspension Bridge

Cable Stayed Bridge

Cable Stayed Bridge

HARP DESIGN

FAN DESIGN

Span Range:
Medium

Cantilever Bridge

Cantilever Bridge


Horizontal beams supported on only
one end.


Most cantilever bridges use a pair of
continuous spans that extend from
opposite sides of the supporting piers
to meet at the center of the obstacle
the bridge crosses.


Cantilever bridges are constructed
using much the same materials &
techniques as beam bridges. The
difference comes in the action of the
forces through the bridge.








Span Range:
Medium

Cantilever


A beam anchored at only one end.







1
-
minute Drawing Review

Directions
:
Now you will be passed out a sheet to go along with this
activity. When this occurs, you will have one minute to sketch the
designated style or part in the appropriate box on the “
Bridge Styles”
worksheet. Add key features and label parts that best describes the style
or part of the bridge.