Leonardo's Arched Bridge
Channel: Kids Fun Science
Date: 2020-02-24

Leonardo's Arched Bridge 

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Chapters
0:00 Kids Fun Science Intro
0:06 What you need
0:13 Set up
0:50 Science behind Leonardo's Arched Bridge

What's cool about this experiment is doesn't use nails, screws, rope, glues, notches, or other fasteners are holding the bridge in place. Just friction and gravity. 

Leonardo da Vinci although he's best known for iconic works such as "Mona Lisa" and "Last Supper," in the early 16th century, da Vinci designed a lesser-known structure: a bridge for the Ottoman Empire that would have been the longest bridge of its time. Had it been built, the bridge would have been incredibly sturdy, according to a new study.

Interestingly, Norway's da Vinci Bridge—a pedestrian overpass opened in 2001—is loosely based on the 1502 sketch but uses steel and wood instead of masonry blocks. The prototype of the bridge is a walkway of 4 meters (13 feet) long and can hold a weight of up to 500 kilograms (1102 pounds)

SCIENCE BEHIND IT!
Modern bridges are built with high-strength materials and carefully selected fasteners. Designs considerations include the weight of the bridge and the load it carries as well as stresses caused by wind and earthquakes. Bridge components are subject to tension, compression, torsion, and shear 

Leonardo’s arched bridge is amazing in that the design is self-supporting, requiring no fasters. Leonardo envisioned using nothing but large logs to build his bridge. The bridge’s own weight holds it together. As weight is added to the bridge. Its structural elements are forced more tightly together, making it even stronger.