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Introduction to Engineering and Technology Concepts

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Introduction to Engineering and Technology Concepts Unit Eight Chapter One Introduction to the Bridge Instructions for Success: Each chapter of every unit will ... – PowerPoint PPT presentation

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Title: Introduction to Engineering and Technology Concepts


1
Introduction to Engineering and Technology
Concepts
  • Unit Eight
  • Chapter One
  • Introduction to the Bridge

2
Instructions for Success
  • Each chapter of every unit will begin with a
    Mindjog. This is a warm up question that you
    should answer in your workbook in the proper
    chapter.
  • Please take notes as you move through the
    presentations in the notebook that has been
    provided.
  • Sections will come up in each presentation with
    an assignment notice. Turn to the section
    detailed on the slide in your workbook and
    complete the assignment before proceeding.
  • Good luck!

3
Objective
  • Students will review general bridge design,
    build, and then compare types of bridges.

4
Mindjog!
  • On your worksheet, please respond to the
    following question 
  • What are some things that you, as an engineer,
    might take into consideration when building a
    bridge?

5
Your Assignment
  • All of the Chapters in this course have been
    leading up to an assignment where you will be
    moved into the Technology Education Lab to
    produce an artifact.
  • The theme of this assignment is an amusement
    park is being built on a island in the Chesapeake
    Bay and we need to build a bridge to connect the
    island to the mainland.
  • Completing this task and the associated
    assignments will require you to recall knowledge
    from previous units as well as this current one.

6
Bridges
  • We have said that construction activities do not
    always produce buildings.
  • In regards to transportation technologies, a
    bridge is vital to provide a path to move over
    obstacles.
  • These obstacles include marshy areas, ravines,
    other roads, and bodies of water.
  • Bridges can carry a number of transportation
    systems that include highways, railroads, canals,
    pipelines, and footpaths (Wright, 2004).

7
Bridges (continued)
  • Generally, there are two types of bridges fixed
    and movable.
  • A fixed bridge does not move. Once it is set in
    place, it stays there.
  • Movable bridges can change their position to
    accommodate traffic below it. This type of
    bridge is used to span ship channels and rivers.
    The bridge can be drawn up or swung out of the
    way so that ships can pass (Wright, 2004).

8
Bridges (continued)
  • Bridges have two major parts the superstructure
    and the substructure.
  • The superstructure includes the abutment and
    piers. It carries the loads of the deck to the
    substructure. The deck is the part used for the
    movement of vehicles and people across the
    bridge. The kind of superstructure indicates the
    type of bridge.
  • The substructure spreads the load of the bridge
    into the soil.

Deck
Abutment
Piles
Pier
Span
Earth
Water
Earth
(Wright, 2004)
Earth
9
Types of Bridges
  • Beam Bridges use concrete or steel beams to
    support the deck. This is a bridge that you
    would commonly see on interstate highways.
  • Truss Bridges Use small parts arranged in
    triangles to support the deck. These bridges
    carry heavier loads over longer spans than the
    Beam Bridges.
  • Arch Bridges use curved members to support the
    deck. Arch bridges are used for longer spans.
    (Wright, 2004).

Suspension
Arch
Truss
Cantilever
10
Types of Bridges (continued)
  • Cantilever Bridges use trusses that extend out
    like arms. The ends of the arms can carry small
    span or hook up to each other. The load is
    transmitted by the arms to the center. None of
    the load is carried by the ends of the arms.
  • Suspension Bridges use cables to carry the
    loads. A large cable is suspended from towers.
    From the large cable, smaller cables drop down to
    support the deck. (Wright, 2004).

Suspension
Arch
Truss
Cantilever
11
Assignment 1
  • Please turn to the section in your workbook
    entitled, Unit Eight, Chapter One Introduction
    to the Bridge.
  • Complete the extension questions under the
    Assignment 1 header before moving onto the
    next section of slides.

12
BEFORE MOVING ON
  • Did you complete the Assignment 1 Section
    under the Unit Eight, Chapter One Introduction
    to the Bridge section of your workbook?
  • If you have, please proceed to the next slide.

13
Final Assignment Parts
  • Your assignment is going to be completed in two
    portions that must be signed off by your current
    teacher.
  • This work is to be completed in teams of two.
    Therefore, you and another student should be
    working together on the same PC for the rest of
    this assignment. Make sure your instructor knows
    who is working together!
  • Only when these portions are signed off will you
    and a partner be able to go into the Technology
    Education Lab
  • Virtual Bridge Design
  • Engineers Sketch of Bridge

14
BEFORE MOVING ON
  • Make sure that your computer has a copy of the
    West Point Bridge Designer 2007 Program installed
    on it.
  • If it does not, ask your instructor to install
    it.
  • Only after this is installed, may you proceed to
    Chapter 2 Virtual Bridge Design

15
Chapter One Completed!
  • Please close this presentation and launch the
    file entitled, Chapter Two Virtual Bridge
    Design.

16
References
  • Wright, R. (2004) Technology The
    Goodheart-Willcox Company, Inc.
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