PT Slab Process 3D animation | Rebar 360

Описание: A post-tensioned (PT) slab, also known as a post-tensioned concrete slab, is a type of concrete floor or slab that is reinforced with high-strength steel tendons. The technique of post-tensioning involves tensioning the steel tendons after the concrete has been cast and cured.

Here's how a post-tensioned slab is constructed:

Formwork: The formwork is set up to define the shape and dimensions of the slab.

Steel tendons: High-strength steel tendons, typically made of individual strands or bars, are positioned within the formwork in a predetermined pattern. These tendons run in both the longitudinal and transverse directions of the slab.

Pouring concrete: Concrete is poured into the formwork, encapsulating the steel tendons. The concrete is allowed to cure and gain sufficient strength.

Tensioning: Once the concrete has achieved adequate strength, the steel tendons are tensioned. This process involves applying a significant force to the tendons, typically using hydraulic jacks, which elongates and stresses the steel.

Anchoring: Once the tendons are tensioned, they are anchored to the concrete. Specialized anchorages or wedges are used to secure the tendons in place, transferring the tension force to the concrete.

The purpose of post-tensioning is to introduce compressive forces into the concrete, effectively counteracting the tensile forces that the slab would experience during its service life. This technique enhances the structural performance of the slab, allowing for larger spans, thinner sections, and reduced cracking compared to conventionally reinforced concrete slabs.

Post-tensioned slabs are commonly used in various structures, including bridges, parking garages, high-rise buildings, and industrial facilities, where the ability to span longer distances or support heavier loads is required.

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