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Experiments with 17 spirally prestressed concrete cylinders; spiral prestressing wire volume was 0.6 to 1.2% of concrete volume; ultimate axial stress was increased 2.5 times but was independent of lateral prestress; axial stress at which Poisson's ratio deviated from constant, at 0.05% offset and at minimum volume were increased by factors of 1.5 to 2.0 by lateral prestressing; creep rupture occurred at 12.75 ksi axial stress but not at 5 ksi; 4 ksi axial compression might be working stress for materials and percentages investigated. (48571)
Experiments with 17 spirally prestressed concrete cylinders; spiral prestressing wire volume was 0.6 to 1.2% of concrete volume; ultimate axial stress was increased 2.5 times but was independent of lateral prestress; axial stress at which Poisson's ratio deviated from constant, at 0.05% offset and at minimum volume were increased by factors of 1.5 to 2.0 by lateral prestressing; creep rupture occurred at 12.75 ksi axial stress but not at 5 ksi; 4 ksi axial compression might be working stress for materials and percentages investigated. (48571)
Spirally prestressed concrete cylinders
J Amer Concrete Inst
Martin, C.W. (author)
1968
9 pages
Article (Journal)
English
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