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Structural Testing Laboratories
The Structural Testing Laboratories in the Department of Civil Engineering are among the top few such centres in North America and have received numerous awards for the quality of research performed. One example is the American Concrete Institute (ACI) Charles S. Whitney Medal received in 1989 "for distinguished experimental research and interpretation of the response of structural concrete to load combinations". The main laboratory facilities include both the Mark Huggins Structures Laboratory and the Sandford Fleming Structures Laboratory, as well as numerous ancillary areas such as a concrete mixing laboratory, machine shop and a woodworking shop.
Main Laboratories
Major Equipment
- Baldwin Universal Testing Machine
- MTS Mobile Testing Machine
- MTS Stiff Frame Testing Machine
- MTS 1000 kN Testing Machine
- MTS 245 kN Testing Machine
- MTS Portable Actuators
- Shell Element Tester
- Shear Panel Tester
- Column Testing Frame
- Hydraulic Testing Facility
- Riehle 60 kip Testing Machine
- Instron 10 kip Testing Machine
- Strong Floor / Reaction Wall
- Full-Scale Meccano Set
Ancillary Facilities
Mark Huggins Structures Laboratory
The Mark Huggins Structures Laboratory, constructed in 1960, provided the Department with one of the best such facilities in North America at that time. Experiments conducted in the laboratory have contributed significantly to the development of Canadian structural engineering codes and practice. The Mark Huggins Structures Laboratory was basically designed and equipped to test individual structural elements, (primarily individual beams and columns - i.e. bar-like specimens), under simple loading conditions.
Approximately one-half of the floor area in this laboratory serves as a tributary area to the 5,400 kN capacity Baldwin-Lima-Hamilton Universal Testing Machine. This machine, dating from 1960/61, was upgraded with a new control console in 1974 and underwent major repairs and improvements as a result of an NSERC Equipment Grant in 1986.
In addition to the Baldwin Testing Machine, the Mark Huggins Laboratory contains a strip of strong floor 21 m long by 4 m wide which, when combined with a set of portable universal reaction frames, enables large "beam-like" structures to be tested.
The laboratory and its neighbouring rooms also contain several MTS electro-hydraulic testing systems including a 4,500 kN capacity very stiff frame, a 250 kN capacity testing frame, a 1,000 kN capacity cyclic testing frame and a 20 gpm pump and controllers for the servo-controlled machines.
Another major item of equipment in the Mark Huggins Structures Laboratory is the Shell Element Tester, utilized for studying the behaviour of very large reinforced concrete elements subjected to in-plane and out-of-plane forces. This piece of equipment, housing 60 hydraulic jacks, was constructed in 1984 and was sponsored by NSERC, the University of Toronto, Ontario Hydro, the Canadian Portland Cement Association and Norsk Hydro.
In 1991, as part of a continuing program of Offshore Structures research, the Hydraulic Testing Facility was commissioned. This facility basically consists of a 2.6 m diameter, 4.3 m high pressure vessel (maximum sustainable pressure is 300 psi which equates to approximately a 200 metre water depth) and ancillary accessories (pump, water reservoir, etc.) which can be used to carry out tests on model offshore structures under high water pressure.
The Mark Huggins Structures Laboratory is also serviced by a ten ton overhead crane and houses a diverse range of minor testing apparatus, including hydraulic jacks and load cells.
Sandford Fleming Structures Laboratory
The Sandford Fleming Structures Laboratory, which has approximately 700 m2 of floor area and an 18 m x 12 m strong floor as well as a 5 m high by 5 m wide reaction wall, was constructed following a fire in 1977 and was officially opened in 1982. With the aid of an NSERC Major Installation Grant, this laboratory was then outfitted with world-class, "state-of-the-art" testing equipment for research on large scale structural specimens.
A major feature of this laboratory is a computer-controlled electro-hydraulic, closed-loop testing system, which includes a purpose-built 2,700 kN capacity moveable MTS dynamic loading frame. The main loading frame, when combined with four 350 kN capacity portable MTS actuators, the strong floor, the reaction wall and a number of portable universal steel reaction frames, provide a system capable of loading large, "three-dimensional", structural sub-assemblies in an infinitely variable format.
Another major piece of equipment in this laboratory is the Shear Panel Tester which is used to apply arbitrary in-plane stresses to thin reinforced (or prestressed) concrete panels in order to determine realistic constitutive models which can later be used by nonlinear finite element programs. This tester which includes 38 - 10,000 psi hydraulic jacks and its own control apparatus was the first of its kind in the world (first used in 1979) and has since been emulated by various research laboratories in the United States, Japan and England.
One item of equipment currently on extended loan from the University of Houston is the Beam-Column Testing Frame. This consists of a specially constructed frame which houses a 4500 kN hydraulic jack for the application of axial loads and a 1000 kN servo-controlled actuator for the application of transverse loads. This frame is capable of testing specimens that are up to 4 m long while the transverse dimensions are limited by laboratory space and the strength of the materials used in the specimen. A major upgrade of this frame is currently underway which will increase the axial load capacity to 9,000 kN.
The Sandford Fleming laboratory is serviced by a ten ton capacity overhead crane, used to facilitate placement of large specimens, and also contains a modern welding bay capable of flux-cored, gas-shielded and submerged arc welding processes. This welding bay is serviced by its own five ton capacity overhead crane.
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