Posts tagged with "Earthquakes":

Placeholder Alt Text

Video: Chinese Hotel Climbs Fifteen Stories in Six Days

Would you stay in a 15-story structure built in six days?  Through the magic of prefabrication, one new hotel in Changsha, China was built erector-set-style at just such a fantastic pace and recorded through time-lapse photography. The better term might be constructed in six days, however, as the building's foundation and the factory-made pieces were already finished at the beginning of this architectural ballet, but the feat proves rather amazing nonetheless. While you might have never heard of Changsha, China, home to the new Ark Hotel, the country's 19th largest city mirrors the building's rapid growth.  Changsha tripled in size between the 1940s and 1980s and today contains an estimated population of 6.6 million. While such a quickly constructed building might seem prone to shoddy construction, the Ark Hotel is reportedly built to withstand a magnitude 9 earthquake, meaning a quake over 1,000 times more powerful than January's quake in Haiti.  Call us skeptical, but we'd opt to be out of the building when disaster strikes. Prefabrication, architecture's "oldest new idea," can have its green benefits. The Ark Hotel is thermally insulated and boasts only one percent construction waste. [ Via Gizmodo. ]
Placeholder Alt Text

California Universities Fail Seismic Test

Since the recent earthquakes in Haiti and Chile, a lot of attention has been focused on the preparedness of the United States to absorb such massive tremors. Nowhere is this more true than in California, the state that is perhaps the most poised in the country to deal with such disasters, as well as the most prone to suffer them. A recent report last week from California Watch—a consortium of investigative journalists who relish tackling the tough issues—found that the state's public universities have been particularly remiss in earthquake-proofing their facilities. The report identified 108 buildings owned by state universities that engineers say would suffer serious structural damage in the event of a major quake. UC Berkeley topped this list with 71 occupied buildings that failed to make the grade. California is expected to feel one or more magnitude 7.5 or greater earthquakes in the next 30 years.
Placeholder Alt Text

Do Not Let Me Down

Engineering News Record brings us the news that the U.S. Embassy in Port-au-Prince is one of the few major buildings to survive the January 12th earthquake with only minor damage. According to the report, the facility remained functional during and after the earthquake: the electricity stayed on, communications systems continued to function, and water and air kept operating. As a result the building has become an important center for relief efforts. The reason that the 134,000-square-foot structure escaped the general devastation seems to be that it was built recently in accordance with the International Building Code and the State Department's Overseas Building Operations requirements. The building was constructed between 2005 and 2008 as a design-build project by New York City-based Fluor Corp, was bolstered by reinforced concrete shear walls, and had mechanical and electrical systems built to withstand seismic events.
Placeholder Alt Text

Green Tremors

Icarus. The Tower of Babel. We all know what can happen when humans reach too high. Well, apparently reaching too low can also have some negative side effects. In mid-August, a geothermal power plant under construction in Germany set off a trembler that registered at 2.7 on the Richter scale. A similar project in Basel, Switzerland, set off successive earthquakes in 2006 and 2007, one registering as high as 3.4. While some seismic activity has always resulted from geothermal installations, a new process which digs deeper and involves fracturing solid rock, rather than harvesting existing steam beds, both promises to increase power production and, evidently, earthquakes. The news is disheartening, considering that a report from the Department of Energy that came out earlier this year cast geothermal energy as real possibility for significantly reducing our reliance on fossil fuels in a relatively short time frame.
Placeholder Alt Text

Not Just Invisible, Earthquake Invisible

Architects have, for obvious reasons, been fascinated with earthquakes for as long as they have been knocking over buildings. Lots of structural systems and building materials have been explored, but what about invisibility? Capitalizing on recent advances in invisible cloak technology, scientists in France and Britain think they can hide buildings from those damning shockwaves coursing through the earth. New Scientist explains the tech thusly:
The new theoretical cloak comprises a number of large, concentric rings made of plastic fixed to the Earth's surface. The stiffness and elasticity of the rings must be precisely controlled to ensure that any surface waves pass smoothly into the material, rather than reflecting or scattering at the material's surface. When waves travel through the cloak they are compressed into tiny fluctuations in pressure and density that travel along the fastest path available. By tuning the cloak's properties, that path can be made to be an arc that directs surface waves away from an area inside the cloak. When the waves exit the cloak, they return to their previous, larger size. [...] When it comes to installing them into buildings, they could be built into the foundations, Guenneau suggests. It should be possible to make concrete structures with the right properties. To protect a building 10 metres across, each ring would have to be about 1 to 10 metres in diameter and 10 centimetres thick. The concentric ring design can also be scaled down, and could offer a way to control vibration in cars or other machinery, he adds.
Now if only we could perfect fire-proof buildings. (Via Twitter, where BLDG BLOG also pointed us to what looks like a failed attempt at an earthquake-proof building--those tubes certainly look like what's described above. Which leads us to wonder if the old jibe that "Made in China" is a sign of inferior quality no longer stands.)