👉How tensile stress is developed in reinforced concrete section?

🚧Tensile stress in a reinforced concrete (RC) section develops mainly due to bending and external loads.

⭐️Here is the clear step-by-step mechanism

💫1. Concrete behavior under load

⏺Concrete is strong in compression but weak in tension. When loads act on an RC member (beam, slab, etc.), internal stresses are created.

💫2. Bending action causes tension

⏺When a beam is subjected to bending (for example, a simply supported beam with load from above):

⏺The top fibers of the section shorten:- compression
⏺The bottom fibers elongate :-tension

💫3. Development of tensile stress in concrete

⏺As bending increases:
The bottom part of the concrete is stretched
⏺Tensile stress develops in that zone Concrete cannot resist high tension

💫4. Cracking of concrete

⏺When tensile stress exceeds the tensile strength of concrete: Cracks form in the tension stops carrying tension effectively

💫5. Role of steel reinforcement

⏺Steel bars are placed in the tension zone because:
Steel has high tensile strength
Steel and concrete bond together After cracking, steel carries almost all tensile stress

💫6. Final stress condition in RC section

⏺Concrete:-carries compression
⏺Steel reinforcements carries :- tension
⏺Both act together as a composite section

📜Summary

Tensile stress in reinforced concrete develops due to bending caused by external loads. The tension zone stretches, concrete cracks, and the steel reinforcement takes over the tensile forces.

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