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Video and Photo Update
Two shake tests have already been performed, the first video is of the building being shaken at 140% Canoga Park. This is approximately 1.16 times the design-basis earthquake for Los Angeles. Damage was minimal and non-structural with some small drywall cracks near the windows at approximately 45 degrees.
Link to Video
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The second video is of the building being shaken to the Canoga Park recording of the Northridge earthquake. The steel frame was locked down providing a a rigid base for the six-story wood building. It was scaled to the Design Basis Earthquake for Los Angles, which is 120% of the original record. The building performed very well with minimal damage propagation. After 4 shakes the building is still within the range of continued occupancy.
Link to Video
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To view photos and timelapse video of the structure being lifted and moved to the shake table, please follow this link to an online photo album.
The Capstone test at E-Defense has three major objectives:
| Objective 1: |
To confirm that a representative mid-rise woodframe structure designed using the NEESWood PBSD philosophy satisfies the performance objectives, as pre-defined during the design process. These performance objectives are under development and seek to limit damage and losses while protecting life safety.
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| Objective 2: |
Provide a general understanding of the behavior of a mid-rise woodframe structure similar to those currently in place in the Western U.S.
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| Objective 3: |
Confirm a representative mixed-use seven-story woodframe building designed using the NEESWood design philosophy satisfies the performance objectives, as pre-defined during the design process.
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Lumber being stored for construction in the corner of the E-Defense shake table building in Miki, Japan. |
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The first container being lifted off a semi-truck for unloading at E-Defense. |
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One line of the horizontal actuators on the World's largest shake table (E-Defense) in Japan. Notice the ability to rotate vertically because the shake table is tri-axial, essentially reproducing the worlds strongest earthquakes such as the 1995 Kobe and 1994 Northridge earthquakes. |
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A view of the shake table surface from approximately 10 meters (33 ft) above. The shake table has dimensions of 15m x 20m (50ft x 65ft) with a 1200 metric ton payload. The full details on the shake table can be viewed at the E-defense web site: http://www.bosai.go.jp/hyogo/ehyogo/ |
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Photo of the building lifted onto the shake table, ready for its first test. |
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Full view of the building sitting on the shake table |
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