Computer · Prestressed Concrete
A prestressed concrete simply supported rectangular beam having cross-sectional area 'A' and section modulus 'Zb' at the bottom fibre has a span 'S' and is subjected to a bending moment 'M' at the mid-span section. The prestressing tendons are located at an eccentricity 'e' from the centroidal axis and provide an effective prestress of 'P'. The extreme bottom fibre stress at the mid-span section is given as:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1P/A - Pe/Zb + M/Zb
- 2P/A + Pe/Zb - M/Zb✓
- 3P/A + Pe/Zb + M / (2Zb)
- 4P/A - Pe/Zb - M/Zb
Correct answer
P/A + Pe/Zb - M/Zb
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