Question

Yielding of steel in singly reinforced beam occurs in

Answer 1

Answer:

Reinforced concrete beam sections in which the steel reaches yield strain at loads lower than the load at which the concrete reaches failure strain are called under-reinforced sections. Every singly reinforced beam should be designed as under-reinforced sections because this section gives enough warning before failure

Answer 2

Answer:

Yielding of steel occurs before the crushing of concrete in Under reinforced section;

Explanation:

• Yielding of steel occurs before the crushing of concrete in Under reinforced section;
• In RCC structures it is advisable to make an under-reinforced structure rather than a balanced or over-reinforced section
• Because in case of failure of under reinforced section steel reaches its yield stress much earlier than concrete and the failure is ductile in nature with prior indication.

Important Points

• Over-reinforced sections are avoided because there the concrete reaches its permissible strain earlier than steel, hence the failure is brittle in nature without prior indication.