ARTIFICIAL STRUCTURES: TYPES, STRUCTURAL ELEMENTS AND EFFORTS THAT SUPPORT.

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Tacoma Bridge Collapse

Tacoma Bridge Collapse. Was this the wobbliest bridge in the world? Amazing footage of the collapse of the world's third largest suspension bridge (at the time),Tacoma Narrows Bridge, Washington, in 1940. The only casualty was a dog who had been left in a stalled car by its owner. 

Some Greetings for our lastest classes

GeoGreeting is an application that allows you get pictures of letters based on buildings´ plans, which can be located via Google Maps.

We simply have to enter the text you want, and it appears automatically. Then, you can copy and paste each letter, or get your code to be inserted into any blog or website.

Information extracted from http://tecnoaulatic.blogspot.com.es/search/label/biling%C3%BCismo

Some of your GeoGreetings:

http://www.geogreeting.com/view.html?yGodmkBvyCUvyBoxDo#t
http://www.geogreeting.com/view.html?yvEmskUIUkvo
http://www.geogreeting.com/view.html?ysUvsuoUryvsnkI

CLIL activity: Resistant Structures and Triangulation

Your Platform Bridges!

Profiles

Profiles are used in many structures, especially metal ones.

They are bars that have different cross-sections.

By using profiles we can make lighter structures that can bear greater weights as well as using less material.

Famous structures

Thanks to: http://www.technologystudent.com

Efforts

An effort is a force that appears when a structure receives an external force.

The forces that act on a structure are calle loads.

These are the main efforts that a structure can receive:

Traction is an effort that makes an object longer.

Compression this is the effort which squeezes or buckles an element.
When we “squeeze” and element, it becomes shorter and thicker.
When an “element” bends in the middle due to the compression forces, it “buckles”

Bending: a structure which is subjected to bending is being stretched and squeezed at the same time.

Shear: shear forces act across a material; one part of the element slides over the other.

Torsion is the name given to a turning or a twisting force.

http://contenidos.educarex.es/med/2005/15/estructuras/pagina2.htm
Thanks to: http://contenidos.educarex.es