Different between pre-tensioning and post-tensioning members
These methods are used under the pre-stressing process which has few edges over the orthodox non-stressed structures like greater span to depth ratio, higher moment, and shear capacity. These methods are generally adopted in the making of PSC girders, sleepers, etc.
|In this method, the concrete is prestressed with tendons before it is placing in position.
|In this method prestressing is done after the concrete attains sufficient strength.
|This method is developed due to the bonding between the concrete and steel tendons.
|This method is developed due to bearing.
|Pre-tensioning is preferred when the structure element is small and easy to transport.
|Post-tensioning is preferred when the structure element is heavy.
|In this method, similar prestressed members are prepared.
|In this method, products are changed according to the structure.
|Prestressed members are produced in mould and then transported.
|Cables are used in place of wire and jacks are used for stretching.
|Its size is limited.
|Its size is not limited.
|It is cheaper to construct.
|It is costlier.
|It is more durable.
|It depends on their construction mechanism.
|In this process, Members are tensioned at first and then cast.
|In this process, Members are cast first and then tensioned.
|Culverts, girders are constructed.
|Long bridge, buildings with long-span beam are constructed.
1) Concept, Place
2) Size, Members, Suitability
3) Durability, Loss in Prestress, Cost
I hope this article on “Different between pre tensioning and post tensioning of concrete Structure” remains helpful for you.
Happy Learning – Civil Concept
Civil Engineer – Ranjeet Sahani
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