Civil Engineering - RCC Structures Design - Discussion

(c) is the correct one. Because for larger span bridge post-tensioning system is widely used.

I think the answer will be "C".

Post-tensioning is a form of prestressing. Prestressing simply means that the steel is stressed (pulled or tensioned) before the concrete has to support the service loads. Most precast, prestressed concrete is actually pre-tensioned-the steel is pulled before the concrete is poured. Post-tensioned concrete means that the concrete is poured and then the tension is applied but it is still stressed before the loads are applied so it is still prestressed.

How to do post-tensioning? Is this method is applicable for all RCC elements. Please, anyone, explain me.

@Tekalin & @Ashok you both are contradicting each other. Anybody please which one is Post-Tensioning.

After hardening of concrete, the stretched tendons are released. Hence it will try to regain its position and the hardened concrete will not allow tendons to its original position. This whole setup is known as post-tensioned prestress concrete.

Also there is no contact with tendon and concrete.

Post-tensioning is a method of reinforcing concrete or other materials with high strength steel bars. Post-tensioning applications include office and apartment buildings, parking structures, sports stadiums, rock and soil anchors & water tanks.

Anybody knows about interaction diagram? Please explain.

Post tensioning is economical for large spans and it reduces the size of section and as well reduction in deadweight. So load on the structural member is reduced due to its self weight reduction.

Option C is correct. Post tensioning is one methods of prestressing concrete. It is casting concrete first by providing conduit in it, after the concrete is cure enough providing tendons through the conduit and tensioning by using anchor at the two ends abutments.