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The loss in pre-stress in pre-tensioning system is primarily due to
- a)Elastic deformation of concrete and cable slippage
- b)Creep and elastic deformation
- c)Shrinkage and creep
- d)Shrinkage and elastic deformation
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
The loss in pre-stress in pre-tensioning system is primarily due toa)E...
Understanding Pre-Stress Loss in Pre-Tensioning Systems
Pre-stressing is a technique used in concrete construction to enhance the strength and durability of structures. In pre-tensioning systems, the loss of pre-stress is a critical factor that needs to be understood to ensure structural integrity.
Causes of Pre-Stress Loss
The loss in pre-stress primarily occurs due to two main factors:
- Shrinkage
- As concrete cures, it undergoes hydration which leads to shrinkage. This reduction in volume results in a decrease in the tension within the tendons, causing a loss of pre-stress.
- Creep
- Creep refers to the gradual deformation of concrete under sustained load over time. As the concrete continues to deform, the tension in the tendons relaxes, leading to additional loss of pre-stress.
Why Option C is Correct
Option C, which highlights "Shrinkage and Creep," accurately identifies the primary causes of pre-stress loss in pre-tensioning systems:
- Impact of Shrinkage
- The concrete shrinks as it dries, pulling away from the tendons and reducing the effective tension.
- Impact of Creep
- Ongoing deformation under load compromises the initial tension that was established during the pre-tensioning process.
Understanding these factors is essential for civil engineers to design structures that compensate for pre-stress losses, ensuring long-term performance and safety.
Pre-stressing is a technique used in concrete construction to enhance the strength and durability of structures. In pre-tensioning systems, the loss of pre-stress is a critical factor that needs to be understood to ensure structural integrity.
Causes of Pre-Stress Loss
The loss in pre-stress primarily occurs due to two main factors:
- Shrinkage
- As concrete cures, it undergoes hydration which leads to shrinkage. This reduction in volume results in a decrease in the tension within the tendons, causing a loss of pre-stress.
- Creep
- Creep refers to the gradual deformation of concrete under sustained load over time. As the concrete continues to deform, the tension in the tendons relaxes, leading to additional loss of pre-stress.
Why Option C is Correct
Option C, which highlights "Shrinkage and Creep," accurately identifies the primary causes of pre-stress loss in pre-tensioning systems:
- Impact of Shrinkage
- The concrete shrinks as it dries, pulling away from the tendons and reducing the effective tension.
- Impact of Creep
- Ongoing deformation under load compromises the initial tension that was established during the pre-tensioning process.
Understanding these factors is essential for civil engineers to design structures that compensate for pre-stress losses, ensuring long-term performance and safety.
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The loss in pre-stress in pre-tensioning system is primarily due toa)E...
Losses of prestressing:
Since the loss of priestess depends on several factors such as properties of concrete and steel, method of curing, degree of prestressing, and method of prestressing, it is difficult to analyze the exact loss in prestressing forces. However, typical values of losses encountered under normal conditions of work are recommended by Lin as outlined below:
∴ The loss in pre-tensioning is primarily due to shrinkage and creep with 7 and 8 percent respectively.
Since the loss of priestess depends on several factors such as properties of concrete and steel, method of curing, degree of prestressing, and method of prestressing, it is difficult to analyze the exact loss in prestressing forces. However, typical values of losses encountered under normal conditions of work are recommended by Lin as outlined below:
∴ The loss in pre-tensioning is primarily due to shrinkage and creep with 7 and 8 percent respectively.
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The loss in pre-stress in pre-tensioning system is primarily due toa)Elastic deformation of concrete and cable slippageb)Creep and elastic deformationc)Shrinkage and creepd)Shrinkage and elastic deformationCorrect answer is option 'C'. Can you explain this answer?
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