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News and Events

Test Schedule Update, Friday Jan 10 10:56AM PST: The plan for Phase-2 (Precast Hybrid Rocking Wall system both directions in eccentric layout) is posted on website. The testing is planned to start in 1 hour.
Test Schedule Update, Thursday Jan 9 05:00PM PST: The plan for Phase-2 (Precast Hybrid Rocking Wall system both directions in eccentric layout) is for tomorrow Fri Jan 10 late morning (10-noon PST). The testing program will be Seattle and Berkeley service and design earthquakes.

Test Schedule Update, Thursday Dec 19 11:10AM PST: Phase-1 testing under Berkeley DBE and MCE with high Post Tensioning levels in walls (0.6 PT Ratio) will start today sometime around noon. Further updates will be posted soon.

Official press release for the shake table test can be downloaded from here

Test Schedule Update, Monday Dec 16 6:00PM PST: Phase-1 testing under Berkeley MCE with high Post Tensioning levels in walls (0.6 PT Ratio) is planned for Thursday Dec 19. Final words on the testing will be given out on the day of test.

Test Schedule Update, Friday Dec 13 12:20PM PST: The structure was tested  under the Berkeley MCE yesterday for the low wall Post Tensioning case and low damper slip load. No testing today to replace some energy dissipators at the base of wall. The last sequence of Phase-1 testing (High wall Post Tensioning) is planned for Monday morning, Dec 16.

Test Schedule Update, Thursday Dec 12 12:00PM PST: The structure has been tested under DBE with low post tension. Next test ETA is about 1:00PM PST.
Test Schedule Update, Thursday Dec 12 10:20AM PST: The structure will be tested for same DBE earthquake with low post tension of the walls. Expected to start testing at around 11:00AM PST.

Test Schedule Update, Wednesday Dec 11 05:55PM PST: The structure was successfully tested under Seattle and Berkeley DBE. 

Test Schedule Update, Wednesday Dec 11 03:45PM PST: Pumps are on. After charging the accumulators, testing will commence.

Test Schedule Update, Wednesday Dec 11 03:00PM PST: Final checks are being done and we will start the testing in approximately 45mins. The latest test sequence is updated in the hyperlink of schedule. We plan to do three tests today.


Test Schedule Update, Wednesday Dec 11 11:00AM PST: A white noise and service level earthquake were tested last night.Currently the structure is being inspected and data being reviewed. Next earthquake is expected around lunch.

Test Schedule Update, Tuesday Dec 10 7:50PM PST: Pumps are on. We expect to start the white noise and service level earthquake test at 8:30PM today. You can watch the live test by going through the link below. Even though its night, many of the cameras have visibility including several close-ups.

Test Schedule Update, Tuesday Dec 10 6:45PM PSTPhase 1 test final preparation is occurring at the NEES@UCSD  site today Tue Dec 10 for the NEESR project Inertial Force-Limiting Floor Anchorage Systems for Seismic Resistant Building. Final bolt tightening is undergoing and a white noise and service level earthquake test are currently planned for tonight.The major earthquake Phase 1 testing will begin Wed 12/11. We will update the website with latest test matrix shortly.

Shake Testing Schedule

Phase 1

Structure with Inertial Force-Limiting Floor Anchorage System 

Mon-Tue Dec 9-10, 2013 

Phase 2

Precast Hybrid Rocking Wall System 

Mon-Wed Dec 16-18, 2013 

Phase 3

Precast Emulative Shear Wall with High Strength Reinforcement 

Mon-Wed Jan 13-15, 2014 

Remote observation of the tests will be available for each experiment at:  http://nees.ucsd.edu/video/ 

Informational and updates/alert emails will be sent in the days and hours before the test.

Each Phase will have a testing day event for in-person observation, as different groups may have interest in one or more phases. Shake Table Test Event DatesTue Dec 10 and Wed Dec 18, 2013; and Wed Jan 15, 2014

Test Phase Summary:

In Phase 1, the floors are connected using the special anchorage system. The LFRS is unbonded post-tensioned (PT) bar precast hybrid rocking walls. The structure is expected to experience reduced seismic response due to relative motion (“sliding”) of the floors. The ground motion sequence will proceed from a service to a design to a maximum considered earthquake at Berkeley CA.

In Phase 2, the special floor anchorage system will be replaced by a traditional diaphragm connection (JVI PSA). The structure will be subjected to same sequence of earthquakes to provide a direct comparison to Phase I. The structure should experience the normal seismic demands anticipated at each seismic hazard level, which are expected to be significantly larger than in Phase I. The three precast hybrid walls are in an eccentric C-shaped layout and thus should undergo bi-directional drift and yaw.

In Phase 3, the PT will be removed and the walls will be grouted into pocket foundations to create Precast Emulative Shear Walls. The shear walls are reinforced with Grade 100 reinforcement to allow the examination of a RC wall structure with high strength reinforcement under strong intensity ground motions up to or exceeding the MCE. The eccentric layout will again induce twisting of the structure in plan, causing simultaneous bi-directional motion and yaw of the walls.