Computer · Concrete Technology
The neutral axis depth factor (k) of balanced reinforced concrete sections in the working stress method depends on the permissible stresses in concrete (σcbc), steel (σst) and the modular ratio (m). The value of k can be evaluated by which standard simplified expression for M20 concrete and Fe415 steel?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1k = mm + (σcbc / σst)
- 2k = 280280 - 3σst
- 3k = 280280 + 3σst✓
- 4k = 11 - (σcbc / mσst)
Correct answer
k = 280280 + 3σst
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