Hydraulic Power Unit and Servo control System for an Existing Actuator

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Funds are requested to purchase a 90-gallon per minute hydraulic power unit and a servo control system. They will replace the existing hydraulic power unit, which has an inadequate capacity (10 gallons per minute), and an outdated servo control system. The requested equipments will allow utilizing the full capabilities of an existing actuator, creating an adequate loading system that can: (1) achieve a maximum compressive load of 1459 kN and a maximum tensile load of 960 kN, (2) maintain a constant load while making observations and taking measurements, (3) apply dynamic loads, and (4) conduct load-control and displacement-control tests. The limitations of the current testing system are a major hurdle for the research programs of the four applicants. The load requirements for their tests require utilizing the actuator to its full capacity. The new control system allows conducting displacement-control tests, thus providing a critical safety measure for the expected level of loads. The ability to carry out dynamic testing is essential for several research projects, for instance on Shape Memory Alloys (SMAs) since their behaviour is affected by the rate of loading. The immediate research programs that require the new loading system include: (1) utilizing the unique properties of SMAs to achieve sustainable structures that need minor repair following exposure to earthquakes, (2) assessing the effect of corrosion on the local buckling stability of steel bridge members, (3) developing a new precast shear wall system that is easier and cheaper to construct, and (4) conducting research on concrete pipes reinforced using hybrid schemes of composite fibre-reinforced polymers and novel alloys, and on ductile ultra-high performance concrete. Technical support and replacement parts are not available for the existing loading system, which puts the research studies of a large number of HQP (listed in Forms 100 of the applicants) at a great risk. The applicants have the necessary funds for the operation and maintenance of the requested equipments. A full-time technician is available to operate, maintain, and manage this critically needed loading system.