A method of prestressing where the tendons (steel cables or rods) are stretched and anchored before the concrete is poured and cured.

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A method of prestressing where the tendons are installed in ducts within the concrete after it has been cast and cured, and then stressed to apply a compressive force.

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Steel cables, rods, or bars used in prestressing concrete. They are the components that are stretched and stressed to provide the compressive force.

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The device or system used to secure the ends of the tendons in both pre-tensioning and post-tensioning systems.

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Tubes or channels embedded in the concrete that contain the tendons during the post-tensioning process. They protect the tendons and allow for the application of prestress.

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The initial force applied to the tendons during the prestressing process, which is transferred to the concrete.

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The process of transferring the prestressing force from the tendons to the concrete, often done after the concrete has reached sufficient strength.

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The portion of the initial prestressing force that remains in the concrete member after accounting for losses due to factors such as elastic deformation, shrinkage, and relaxation.

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The reduction in the effective prestress force over time due to factors like creep, shrinkage, relaxation of the tendons, and other effects.

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The gradual increase in deformation under a constant load over time, which affects the amount of prestress that is retained in the concrete.

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The reduction in the volume of concrete as it dries and cures, affecting the prestressing force.

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The decrease in the stress within the tendons over time due to the gradual reduction in the tension they carry.

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The way in which the internal forces are spread throughout the concrete member, influenced by the prestressing forces.

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: A beam that has been prestressed to improve its load-carrying capacity and reduce deflection.

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A flat, horizontal structural element that has been prestressed, commonly used in floors and roofs.

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Devices or systems used to securely attach the ends of the tendons to the concrete structure.

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: The adhesion between the tendons and the surrounding concrete, which allows the transfer of stress.

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The condition where the strains in the prestressed concrete member are consistent with the stress-strain relationship of both the concrete and the tendons.

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the tendons are bonded to the concrete to ensure that the prestress force is effectively transferred.

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