Japan´s E-Defense Shaking Table Test

[faros3000]

[attachment=1017]E-DEFENSE

About JAPAN´s E-DEFENSE:

NIED has been constructing 3-D Full-Scale Earthquake Testing Facility, nicknamed "E-Defense" in the city of Miki, to the north of Kobe. Construction of this facility began in 1999 and will be completed in 2005. Therefore, this facility will begin to make its contribution ten years after the Hyogoken Nanbu (Kobe)Earthquake.
The world's largest shaking table, which can simulate high level ground motions, is taking shape in Japan. The opportunities and challenges provided through this facility are great. It will be a focus of full-scale testing of structures due to high-intensity earthquakes. It is a vehicle through which hope and optimism for improving the behavior of urban regions due to earthquakes will get an added boost.

Collection of videos of shaking table tests of a number of structures:

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The 4-story steel structure listed there was subject to a very interesting performance based engineering study by Deierlein et al, and the results just appeared in the latest issue of EERI´s Earthquake Spectra:

Abstract: A welded steel moment-frame building is used to assess performance-based engineering guidelines. The full-scale four-story building was shaken to collapse on the E-Defense shake table in Japan. The collapse mode was a side-sway mechanism in the first story, which occurred in spite of a strong-column and weak-beam design. Computer analyses were conducted to simulate the building response during the experiment. The building was then evaluated using the Seismic Rehabilitation of Existing Buildings (ASCE-41) and Seismic Evaluation and Upgrade Criteria for Existing Welded Steel Moment-Frame Buildings (FEMA-351) for the collapse prevention performance level via linear and nonlinear procedures. The guidelines had mixed results regarding the characterization of collapse, and no single approach was superior. They mostly erred on the safe side by predicting collapse at shaking intensities less than that in the experiment. Recommendations are made for guideline improvements. ©2009 Earthquake Engineering Research Institute.

(hope i can post later the full pdf paper)

Regards all,