If you compare an earthquake to snapping your fingers, the rupture is the fingers snapping, but what you hear, or "feel" is the sound waves travelling through the atmosphere. World's largest outdoor shake table receives $16.3M from NSF for upgrades. Shake table are an essential tool for assessing the behavior of structural components, the whole system works similar to those induced in real earthquake.
Figure 16. The high performance capabilities of the actuators, along with corrective commands from the sophisticated, MTS 469D controller, complete the de-coupling. View of armature attached to shaking platform and aluminum disk. The overall plan dimensions of the tie-down slab are 20 x 60 ft. Build a shake table—a device engineers use to simulate the back-and-forth shaking of an earthquake. The maximum horizontal clearance between the vertical columns is 10'. The PEER-UC Berkeley Lab has a long history of successfully providing the engineering community testing facilities, the staffing expertise to execute a given project, and the academic background to provide appropriate data analysis, design input and overall project management. The test floor was designed to act as a hollow box girder in the longitudinal direction and as a vierendeel girder in the transverse.325 Davis Hall, University of California, Berkeley, CA 94720-1792 1301 S. 46th Street, Richmond, California 94804-4698 The below the crane hook ceiling height of the Lab is 65' and the truck entry door to the Lab is 11' wide and 16' tall. The eight hydraulic actuators that drive X and Y motion, along with yaw, are attached between the Shaking Table foundation and the tables transverse ribs.
Opposite view of shake table. You will find other information (not Drop, Cover and Hold) on the Internet about what to do in an earthquake.Earthquake Resurrection is serious study bringing to the prophetic landscape a fresh analysis of the future resurrection of the dead in Christ and the meaning of theEarthquake shaking hazards are calculated by projecting earthquake rates based on earthquake history and fault slip rates, the same data used for calculating ...Articles and information for earthquakes. A bookmarkable, remarkable tool!.Procedure. The Shaking Table is configured to produce three translational components of motion; vertical and two horizontal, plus three rotational components; pitch, roll and yaw. The platform is 7' x 19'. Assembled shake table with Popsicle stick building. In static loading, the actuators have a peak-to-peak stroke limit of 500 mm A Southwark-Emery, 4,000-kip Load Frame, originally built in 1932, was moved from the main campus and installed at the current PEER-UC Berkeley Lab in 1964.
The PEER single degree of freedom shaking table has a maximum stroke of +/-20 inches. Take Cover. Note c-clamp securing the table to the table upon which it rests. The slab has 2-1/2 inch holes located in an array of 36 inch on center over the 20 x 60 ft area. It houses a 15t capacity, 6 DoF earthquake shaking table surrounded by a strong floor and adjacent strong walls up to 15m high. For earthquake simulations, one of the services we provide are shake tables. These 6 DOF can be programmed to reproduce any wave form within the capacities of force, velocity, displacement and frequency of the Shaking Table system. Static or dynamic loads may be applied to specimens using tie rods, hydraulic actuators and steel loading frames. A 10-ton bridge crane services the Shaking Table Lab.The concrete shaking table is heavily reinforced, with both traditional reinforcement and post-tensioning tendons.
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Earthquake shaking table