Concrete, Prestressed
Prestressed concrete involves introducing internal stresses using tensioned tendons to enhance the strength and load-bearing capacity of concrete structures.
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Definition
Prestressed concrete is concrete in which internal stresses are introduced to counteract tensile stresses from loads, typically using tendons (cables) that are tensioned and then grouted in place.
Purpose
The purpose of prestressed concrete is to improve the performance of concrete structures under working loads by enhancing their strength, reducing deflection, and increasing their load-bearing capacity.
Examples of Use
- Prestressed concrete beams and girders in bridge construction provide long spans and support heavy loads.
- High-rise buildings use prestressed concrete floors and columns to achieve greater heights and open floor plans.
- Parking structures utilize prestressed concrete slabs for durable and load-resistant flooring systems.
Related Terms
- Tendon: A high-strength steel cable or rod used in prestressed concrete to introduce internal stresses.
- Post-Tensioning: A method of prestressing where tendons are tensioned after the concrete has been cast.
- Pre-Tensioning: A method of prestressing where tendons are tensioned before the concrete is cast.
Notes
Prestressed concrete requires precise engineering and construction techniques to ensure the desired performance. Proper tensioning and anchorage of tendons are critical to achieving the intended benefits.
Related Terms
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