Developing Earthquake-Proof Buildings
March 4, 2010
Destructive earthquakes in Haiti and Chile recently highlight the importance of engineering and testing earthquake-proof systems.
"Since the turn of the century, earthquakes have directly or indirectly (including tsunami) claimed the lives of more than 640,000 people, four times more than in the preceding two decades, and proportionately more than the global increase in population would anticipate," according to a recent paper in the journal Nature.
"If buildings are not made earthquake resistant, the toll is likely to continue to rise as cities grow in population," Roger Bilham, a professor of geological sciences at the University of Colorado and one of the first seismologists to visit Haiti after the recent earthquake there, writes.
Earthquakes generate forces that a building's structure may not be designed to endure. During a quake, the ground moves while the building resists the shaking. "Although most of the ground movement usually is horizontal, a quake can also rock a building up and down, like a rodeo rider on an angry bull," TLC's Tremor Tech says.
Hinging on the idea that building to withstand natural forces is not a losing battle, plenty of engineers and architects believe it is possible to design and construct an earthquake-proof building. At study centers throughout the country, many experts are working to develop new technologies that could minimize the dire costs of a major quake.
"Technology designed to keep buildings from collapsing works essentially in two ways," a CNN Tech report this week explains: "By making buildings stronger, or by making them more flexible, so they sway and slide above the shaking ground rather than crumbling."
These videos introduce a range of earthquake labs where engineers and scientists model earthquakes and the architectural damage such natural disasters can cause, while highlighting sites for testing systems and technologies to make manmade structures more earthquake-resistant, perhaps even earthquake-proof.
Additional: How Engineers and Designers Can Help Haiti
Lessons From the Haiti Earthquake by Roger Bilham Nature, Feb. 17, 2010
Earthquakes: Tremor Tech TLC (Discovery), 2008
In Search of an Earthquake-Proof Building by John D. Sutter CNN, March 2, 2010
The Lab That Could Save Us All From Earthquake Destruction The Infrastructurist, March 3, 2010
How Earthquake-Proof Buildings Work
by Marshall Brain
BrainStuff (HowStuffWorks), Oct. 29, 2008