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Q: For a balanced beam section, the limit state is reached when:
  • A. there is the simultaneous crushing of concrete and breaking of steel
  • B. there is the simultaneous yielding of both concrete and steel
  • C. there is the simultaneous crushing of concrete and yielding of steel
  • D. there is the simultaneous yielding of concrete and breaking of steel
Correct Answer: Option C - For a balanced beam section, the limit state is reached when there is the simultaneous crushing of concrete and yielding of steel. Balanced sections–A balanced section is that in which stress in concrete and steel reach their permissible value at the same time and the actual Neutral axis is also equal to the critical neutral axis.
C. For a balanced beam section, the limit state is reached when there is the simultaneous crushing of concrete and yielding of steel. Balanced sections–A balanced section is that in which stress in concrete and steel reach their permissible value at the same time and the actual Neutral axis is also equal to the critical neutral axis.

Explanations:

For a balanced beam section, the limit state is reached when there is the simultaneous crushing of concrete and yielding of steel. Balanced sections–A balanced section is that in which stress in concrete and steel reach their permissible value at the same time and the actual Neutral axis is also equal to the critical neutral axis.