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Earthquake testing on natural structures.

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On the 8th of October 2005, Pakistan experienced a 7.6 magnitude earthquake. More than 74,000 people were killed, and over 3 million were left homeless.

   
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Back in September 2004, a full year before the devastating earthquake in Pakestan, tests were performed at the University of British Columbia. A cob building was given a 2 g force shake, something closer to a 9 richter and at its epicenter. Amazingly, despite such a violent shake, the cob building remained standing, though large chunks of cob had fallen away from the building. Anyone inside would have survived. Here you can see the structure after the violent testing. You can see more details on The Stanley Park Earthen Architecture Project  


The devistation in Pakestan inspired engineer Darcey Donovan to put her expertise to work in poor rural areas using straw bales to build homes in Pakistan.

 
In 2007, in a similar vain to the earlier test at the University of British Columbia, the Pakistan Straw Bale and Appropriate Building (PAKSBAB) was awarded a research grant from the Earthquake Engineering Research Institute (EERI). The project’s objective was to determine the performance of earth plastered, load bearing, straw bale walls of a small full-scale straw bale house using an earthquake simulation shake table. Darcey Donovan, the founder of PAKSBAB, talks here about the earthquake tests done at the University of Nevada, Reno on the 27th of March 2009.
 
Builders Without Borders is supporting PAKSBAB with educational materials and has donated books and training materials for PAKSBAB. PAKSBAB are revising and translating their publication "Strawbale Construction Curriculum" into Urdu for use in their training courses.
 
Read the research paper Seismic Performance of Innovative Straw Bale Wall Systems (PDF 890Kb) and the Nevada University's "Straw bale house survives shaking" article about the tests. You can also read Andrew C. Revkin interview with Darcey Donovan in the New York Times: "Straw + Simplicity = Quake Resistance" and an article in the New Scientist: "Straw house beats the shakes in earthquake test"
 
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