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.
|1||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.|
|2||This method is developed due to the bonding between the concrete and steel tendons.||This method is developed due to bearing.|
|3||Pre-tensioning is preferred when the structure element is small and easy to transport.||Post-tensioning is preferred when the structure element is heavy.|
|4||In this method, similar prestressed members are prepared.||In this method, products are changed according to the structure.|
|5||Prestressed members are produced in mould and then transported.||Cables are used in place of wire and jacks are used for stretching.|
|6||Its size is limited.||Its size is not limited.|
|7||It is cheaper to construct.||It is costlier.|
|8||It is more durable.||It depends on their construction mechanism.|
|9||In this process, Members are tensioned at first and then cast.||In this process, Members are cast first and then tensioned.|
|10||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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