Year 11 – Bridges
Vocabulary for bridges
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include: Bridge, suspension bridge,
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Interesting articles: Past and future failures, Petroski, Henry American Scientist
Another article: Disaster Inspires Inventor. An excerpt : “The newly built suspension , which spanned a strait in Washington state, was insufficiently rigid and rippled like a clothesline in the breeze, a phenomenon called aeroelastic flutter”;
Yet another article: November 7 1940 . An excerpt: “It would appear from the meager evidence now available thai the long suspension over the of Puget Sound collapsed for the same reason that the walls of
World Wide Web Resources
Types of bridges. There are six basic bridge forms: the beam, the truss, the arch, the suspension, the cantilever, and the cable-stay.
engineers have designed three major types of bridges to withstand all forces of nature.
Great images and concise information
Types of Bridges
Truss Bridge Design. The history and principles of rational truss bridge design
How bridges work – mechanics, physics, mathematics
Major Types of Bridges.
Includes materials and construction
Technical information on
structures. Shape and forces
Technical information on structure – i.e. forces
How Bridges work
Physics of bridges. Power point. Norman Kwong
explore the different types of bridges and its characteristics such as the forces that keep them stable and factors that affect its construction
Bridge Construction – principles
of technology. Power
Point printouts. Looks at
Mechanics: Bridges. The mathematics
and geometry of building bridges
Design your own Truss bridge
Some consideration in the design of long span bridges against progressive collapse
Highway in the sky. Refer to the
Suspension and cable-stay bridges
Bridges. Power point presentation
Oscillations and the
Narrows Bridge collapse
The Tacoma Narrows Bridge collapse showed engineers and the world the importance of dampening, vertical rigidity, and torsional resistance in all suspension bridges
Scroll down to information on the first
Causes of the collapse are explained. There is also footage of the incident
Resonance, Energy in vibrations
physics of bridges
A disadvantage to a suspension bridge is its reaction to the wind. This was discovered during the collapse of the
collapse of the
Bridges over the
Some of the difficulties engineers and architects face in designing bridges are:
the uplift forces of wind. Brisbane is in a cyclone area, and, for tall structures, the wind forces pretty much dominate design decisions;
extreme temperature changes, which cause creep and shrinkage;
vibration frequency: resonance problems in low-frequency structures
About the Gateway
Monkey bar in pioneering use at
steel reinforcement bar connectors in a world first for civil engineering. http://www.monkeysteel.com/pressrelease/gateway_upgrade.html/context/24
Eleanor Schonell Bridge (Green
The cable stayed deck is 20m wide, 520m long (main span of 185 m + two back spans of 73 m), with two 70m-high H-shaped reinforced concrete towers in the river and a tie-down pier at end of each back-span.
Cable stay bridge wins award
The Jack Pesch Bicycle and
A key feature is the Austress Freyssinet multi-strand cable support system, comprising polyethylene sheathed multi-strand 15.2 milimetre strands enclosed in high density polyethylene protective casings
Bridge Projects world wide construction of bridges. May be useful
Detailed investigation shows
Indooroopilly Toll Bridge
Build a bridge