Wobble Friction

Definition

Wobble Friction in prestressed concrete is friction caused by unintended deviation of the prestressing sheath or duct from its specified profile.

Purpose

The purpose of understanding and managing wobble friction is to ensure the effectiveness of prestressing forces in concrete structures, maintaining structural integrity and performance.

Examples of Use

• Prestressed Beams: Ensuring accurate tensioning in beams to prevent structural issues.
• Bridges: Managing friction to maintain the strength and stability of prestressed bridge components.
• Concrete Slabs: Ensuring uniform distribution of prestressing forces in large slabs.

Related Terms

• Prestressed Concrete: Concrete in which internal stresses are introduced to counteract tensile stresses.
• Sheath: A protective covering around a prestressing tendon.
• Duct: A conduit through which prestressing tendons are placed.

Notes

Wobble friction can impact the performance of prestressed concrete if not properly accounted for during design and construction. Accurate placement and tensioning are critical to minimizing its effects.