Civil Engineering - RCC Structures Design - Discussion

5. 

Post tensioning system

[A]. was widely used in earlier days
[B]. is not economical and hence not generally used
[C]. is economical for large spans and is adopted now a days
[D]. none of these.

Answer: Option C

Explanation:

No answer description available for this question.

Vikash Kumar said: (Jun 13, 2013)  
Post tensioning is economical for large span and is adopted now a days.

Mohd Atif said: (Mar 22, 2014)  
As it it economical for large span also it reduces dead load of structure thereby reduces stress.

P.Ayub said: (Aug 8, 2014)  
What is meant by post tensioning?

Mohit said: (Aug 12, 2014)  
A method of prestressing concrete by tensioning the tendons against hardened concrete.

Miss Rupali said: (Aug 19, 2014)  
For post tensioning, while concreting any member ducts are provided intentionally through which the tendons are kept in tension will give to the member after hardening of concrete.

Chithra T.M said: (Dec 5, 2014)  
Post tensioning is how useful are economical?

Umamahesh.D said: (Dec 25, 2014)  
Now a days prestressing by post tensioning method is most economical for large spans especially for bridges. Lesser the dead load more the resisting capacity.

Avijit Kumar Maji said: (Jan 30, 2015)  
Now a day Pre stress are not use.

Mani Deepak Grandhi said: (Mar 21, 2015)  
It reduces self weight there by reducing bending moment and shear force, increase gap between moment of resistance and bending moment, the research is being carried out still on this process.

Gayatri said: (Jul 3, 2015)  
Yes we are use the prestress concrete for box girder in bridge.

Ramesh said: (Jul 25, 2015)  
It is economical for long span.

Nazish Khan said: (Aug 31, 2015)  
It is economical for larger span and increased tensile strength of concrete and to reduced sectional area.

Srinivas said: (Oct 11, 2015)  
Generally used in T-beam girder bridges if any loading.

Tekalign said: (Jan 18, 2016)  
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.

Dileeep said: (Feb 9, 2016)  
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.

Flint said: (Jun 9, 2016)  
Anybody knows about interaction diagram? Please explain.

Samyukta said: (Jun 28, 2016)  
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.

Ashok said: (Jul 9, 2016)  
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.

Abhishek Raj said: (Jul 16, 2016)  
@Tekalin & @Ashok you both are contradicting each other. Anybody please which one is Post-Tensioning.

Sahana said: (Aug 14, 2016)  
How to do post-tensioning? Is this method is applicable for all RCC elements. Please, anyone, explain me.

Divyanshu said: (Sep 11, 2016)  
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.

Samim said: (Nov 2, 2016)  
I think the answer will be "C".

Deep said: (Nov 16, 2016)  
(c) is the correct one. Because for larger span bridge post-tensioning system is widely used.

Hossein said: (Nov 23, 2016)  
I too think the answer will be "C".

Amresh Kumar Meena said: (Dec 17, 2016)  
As per my knowledge the correct answer is "C".

Nikhil Jinde said: (Dec 23, 2016)  
Yes, answer C is correct.

Amol Tandle said: (Jan 23, 2017)  
I think the correct answer is C.

Neeraj said: (Feb 28, 2017)  
The correct answer is "is economical for large spans and is adopted now a days".

Divyang said: (Mar 13, 2017)  
Option C is right answer.

K.Adinarayana said: (Mar 23, 2017)  
Post-tensioning is a technique for reinforcing concrete. Post-tensioning tendons, which are prestressing steel cables inside plastic ducts or sleeves, are positioned in the forms before the concrete is placed.

Thotisie said: (Jun 22, 2017)  
Post-tensioning is very economical and hence it is used in construction long span overbridge. And it can support load effectively in all section.

Ghanshyam Sharma said: (Sep 23, 2017)  
Is economical of construction and more strength provided after constructed day?

Jivan Shrestha said: (Nov 14, 2017)  
Is economical for large spans and is adopted now a days.

Anshul Shakya said: (Nov 20, 2017)  
I think C is the correct answer.

Kasthuri said: (Dec 30, 2017)  
Yes, C is the exact answer.

Uday Shankar said: (Jul 13, 2018)  
Yes, I think C is the appropriate answer.

Anil said: (Jul 16, 2018)  
It is economical against structural form.

Dhanaraj said: (Jul 18, 2018)  
The correct answer is C.

Vasanth said: (Jul 30, 2018)  
I think option C is correct.

Vinay Kumar said: (Sep 13, 2018)  
Yes, answer C is the most appropriate answer.

Vk18 said: (Nov 1, 2018)  
The correct option should be C.

Saan said: (Mar 3, 2019)  
Option C is the correct answer.

Lahari said: (May 28, 2019)  
Yeah, the answer is option C. Because in post-tensioning any shape of cable can be provided Hence it is structurally advantageous for Longer spans to resist the loads Also the losses are less and is economical for large span structures like Flyovers and Bridges.

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