Tests of a 100-ft Continuous Prestressed Concrete Beam

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DOIResolve DOI: http://doi.org/10.4224/20378175
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TypeTechnical Report
Series titleTechnical Paper, Division of Building Research, National Research Council Canada; Issue 184
Physical description63 p.
Subjectcomposite beams; prestressed concrete; loads; strain; purlins; rigid joint fillers; Roofs
AbstractThis report describes the testing of a 100-ft, continuous ( two 50-ft spans), I-shaped concrete beam, prestressed with 56 high-tensile steel wires anchored by the Magnel-Blaton system. One hundred and fifty-two such prestressed beams constituted the main roof beams for four large Army Ordnance warehouses at Cobourg, Ontario. The test load was applied at the purlin points by eleven 50-ton hydraulic jacks operating against a Bailey bridge reaction frame. The details of the design and construction of the beam, the method of test, the instruments used, the observations recorded and an interpretation of the results are given. The loads applied to the beam were symmetrical and asymmetrical loadings of both spans, the National Building Code (1941) test, a 28-day long-term load test and the final load of dead load plus 5.5 live load. The beam was taken to have failed under about six times the design load. The load- carrying capacity of the beam's purlin brackets was also determined by testing.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number8106
NPARC number20378175
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Record identifier8b45674e-36a4-42c1-9c30-a10320df0fce
Record created2012-07-24
Record modified2016-10-03
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