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A cylindrical concrete tank, 30 m external diameter, is to be prestressed circumferentially by means of high-strength steel wire (E, = 2 x 105 N/mm2) jacked at 4 points, 900 apart. If the minimum stress in the wire immediately after tensioning is to be 450 N/mm2 and coefficient of friction is 0.5, calculate :
(a) The maximum stress to be applied to the wires at the jack, and
(b) The expected extension at the jack.
What is the meaning of term -Slip in Anchorage In the case of post-tensioned concrete, when the tendons are anchored at the ends of concrete members, a slip of tendons takes
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Permissible Stresses in Steel As per the Indian code, the permissible stresses in the tendons at the time of initial prestressing should not exceed 80% of the characteristic t
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