Testing Loads on Reinforced Concrete Slabs at Curtin University

When Curtin University Western Australia were considering options for a new 'Reinforced concrete slab' load test system, they approached Moog Engineers for a flexible solution to utilise existing hardware.

The Challenge

Supply a highly flexible test system to meet wide ranging requirements:

  • 2 axes of closed loop servo hydraulic control, while maintaining the option of adding extra axes in the future.
  • Utilising a wide selection of existing 700bar rated double acting hydraulic cylinders (10 tonne to 500 tonne) and feedback elements.
  • Reconfigurable to suit a multitude of unique tests.
    Beams to be tested vary from 110 mm thick concrete slabs to 900 mm deep prestressed members with other materials such as timber, steel and composites.
  • Static tests: Position ramp rate 5mm/hr to 500mm/hr and Force ramp rate 5kN/hr to 60MN/hr.
  • Cyclic tests: Amplitudes up to 200mm for millions of cycles.

The Solution

Moog supplied and commissioned a system based on the Moog Portable Test Controller (PTC) and a 2 axis hydraulic service manifold.

The Moog Portable Test Controller (PTC) is a 4 axis stand alone desktop controller with LCD display designed to provide high performance closed loop control (position / force) of dynamic and static tests typically used in material and structural testing facilities. It can be networked with other Moog controllers to extend the axes count. The Moog PTC has a user friendly interface that allows configuration of axes for independent or master/slave control and to run tests.

The two axis Hydraulic Service Manifold (HSM) allowed for mounting and isolation of desired servovalves for each axis. Filtration to ensure longevity of the system was also provided.

Moog Engineers delivered hands on training during system commissioning so that Curtin University were confident in its operation before leaving site.

The Result

Curtin University were pleased that Moog met and exceeded their requirements on time. 

The capability to coordinate multiple axes in a single test impressed University staff. This allows them to implement classic beam analysis with two different loads at different points on the beam, or two deflections of a non uniform beam & measuring force to determine stiffness at the two points.