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Published byReginald Carr Modified over 8 years ago
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I can’t sit still….I got the hippy hippy shakes!
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Earthquakes are damaging!
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Engineers have been designing materials and structures that can better withstand earthquakes! They put their designs to the test on shake tables.
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There are several rules that we use when building our cities and homes to withstand earthquakes. A lot of this research is done where earthquakes are common. Japan California
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Putting weight near the bottom of a tall object makes it harder to push over!
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BUOYS!!!
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Mass at the bottom is the best way to ensure a strong foundation!
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Deep foundations and pilings anchor the buildings to the ground!
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…maybe a little too much
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If a building cannot sway slightly, it may snap like a brittle twig. Swaying allows the building to ABSORB energy! Concrete crumbles… Steel is the best thing for this! Swaying buildings in Japan! Swaying buildings in Japan!
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http://www.youtube.com/wa tch?v=o1mPXOi5thk&noredi rect=1 http://www.youtube.com/wa tch?v=o1mPXOi5thk&noredi rect=1 What is the strongest structural shape?? TRIANGLES
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How it works! How it works!
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It works in a bridge too!? It works in a bridge too!? Model without damper Model without damper Model with damper! Model with damper! Taipei 101 (the tallest building in the world)
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Action during an earthquake! Action during an earthquake!
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Museum shake table http://www.youtube.com/watch?feature=pla yer_detailpage&v=FTb9Mbx0DwQ http://www.youtube.com/watch?feature=pla yer_detailpage&v=FTb9Mbx0DwQ Elastic Bearing http://www.youtube.com/watch?v=phgdkqn9 aTI (1 min) http://www.youtube.com/watch?v=phgdkqn9 aTI
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