Question
Download Solution PDFA concrete beam is post-tensioned by a cable carrying an initial stress of 1000 N/mm2. The slip at the jacking end was observed to be 5 mm. The modulus of elasticity of steel is 210 kN/mm2. What is the percentage loss of stress due to anchorage slip if the length of the beam is 30 m ?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcepts:
Loss in pre-stress = Strain due to anchorage × Modulus of elasticity of steel
Calculation
Given
Anchorage slip = 5 mm; Beam length = 30 m; Modulus of Elasticity of steel = 2.1 × 105 N/mm2,
Initial pre-stress = 1000 N/mm2
Loss of pre- stress = 1.67 × 10-4 × 2.1 × 105 =35.07 MPa
∴ Loss in pre-stress = 3.51 %
Last updated on Jul 2, 2025
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