EUCENTRE shaking table & bearing tester

The 3-D reaction system for structural testing at EUCENTRE

The activities of the EUCENTRE benefit from one of the most advanced laboratories in the world (TREES Lab – Laboratory for Training and Research in Earthquake Engineering and Seismology). The testing facilities available at the EUCENTRE TREES Lab consist of a large unidirectional high performance shake table, a reaction system composed of two L-shaped reaction walls and a strong floor and an advanced high performance bearing tester system.

The main specifications of the experimental facilities to which access will be offered are as follows:

  • Shake table: Single degrees-of-freedom (uniaxial); 5.6mx7.0m in plan; payload range 70 to 140 tonnes, peak displacement ±500 mm; peak velocity 2.2m/sec; peak acceleration with maximum payload 1.8g; maximum force 2100 kN; maximum overturning moment capacity 4000 kNm (1000 kN at 4 m from the base); digital control, reaction mass of 2350 tonnes.
  • Bearing Tester System: composed of a reaction frame, 4 degrees-of-freedom table and 11 actuators to control dynamically the table. Main performance characteristics are: force capacity 2100kN horizontal and 5000kN vertical and displacement capacity ±580mm horizontal and ±75mm vertical, digital customized control. The bearing tester system shares part of the hydraulic system with the ST and can be physically connected with the shaking table to enhance its dynamic performance.
  • Hydraulic Power System: propulsion of actuators is provided by a mixed system comprising eight pumps for a total continuous flow of 1360 lt/min and by seven groups of accumulators capable of increasing the total flow to 11000 lit/min when running dynamic tests on the shake table and up to 27000 lit/min when used with the BTS.
  • Outdoor flat concrete plate: (11mx28m) for specimen fabrication and demolition after testing and transportation system (customised steel crane) with 110 ton payload capacity.
  • Data Acquisition System: it includes a 250-channel system based on 18 bit hardware and an advanced wireless system based on 8 high definition digital cameras.

Access to the shaking table will be given to projects focused on seismic risk reduction involving dynamic studies on scaled or real scale structures, using concrete, masonry, steel or wooden prototypes. Alternatively, tests can be performed on subassemblies or parts of structures whose behaviour can be conveniently and separately investigated from the whole structure. Users interested in shake table control issues may submit proposals for software implementation, development and testing.

Access to the Bearing Tester System will be given for cyclic static or dynamic seismic tests on bearings and seismic isolation devices, performance assessment and prototype study and development. User activities can be oriented to traditional devices (rubber bearings, dampers, pots, etc.) or to innovative devices, such as those based on pendulum (FPS, friction pendulum system with single and double curvature), magneto-rheological, etc.

Highlights

What's next

Series logo small   SERIES Concluding Workshop
  Joint with US-NEES "Earthquake Engineering Research Infrastructures

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