Question
Download Solution PDFAccording to Whitney's theory, depth of stress block for a balanced section of a concrete beam is limited to
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
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According to Whitney’s stress block theory and IS 456, the depth of the neutral axis for a balanced section (where steel yields just as concrete reaches its ultimate strain) is limited to about 0.53 to 0.537 times the effective depth .
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This ensures the maximum permissible depth of the stress block for safe design before concrete crushing dominates.
Additional Information
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Whitney simplified the actual nonlinear stress distribution in concrete to an equivalent rectangular block.
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The factor 0.53d is key in limiting the depth of compression zone in design calculations.
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It helps distinguish between under-reinforced, balanced, and over-reinforced sections in concrete beam design.
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