Stressing Calculation for Pre Stress concrete
Required details Revised Extension for cable length :
As per Design :
- Diameter of strands
- Area of Strand
- Modulus of Elasticity
- Design Extension for Cable
As per Third party Result or as per Practical :
- Diameter of strands
- Area of Strand
- Modulus of Elasticity
Other Requird data :
- Designed jacking Force
- Ram Area of Jack
- Jack Efficiency
Calculation Revised Extension for cable :
Modify Pressure = (Jacking force x Design jack efficiency / Jack ram Area x Actual efficiency )
Allowable Toterance = +- 5 %
Revised Extension for cable = Design Extention x (design area of strand / Actual Area of strands ) x (Design Modulus of Elasticity / Modulus of Elasticity as per Test )
Allowable Toterance = +- 5 %
Example :
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