Repair Failed Shear Connections in Concrete Parking Structures

V2 Composites, a provider of Carbon Fiber Reinforced Polymer (CFRP) repair solutions in precast concrete, introduces the new and improved T-Biscuit, a go-to solution for the repair of failed shear connections in concrete parking structures.                               

The next generation product, fabricated from custom-engineered CFRP laminate, meets or exceeds all the demanding capacities of the original T-Biscuit, and it accommodates the loads and fatigue increasingly associated with shear connection failure.

V2’s proprietary carbon fiber T-Biscuit has proven to be the simplest and most economical solution on the market today to repair failed flange-to-flange shear connectors of pre-cast double tee beams, which often fail as a result of fatigue and/or corrosion.

Over the last four years, V2’s engineers and composite experts have been in constant contact with customers, listening to their recommendations and their needs. The result is a new and improved product that will not only remedy shear connection failures in existing structures but the new T-Biscuit can be utilized in new construction projects as well.

The next generation product, fabricated from custom-engineered CFRP laminate, meets or exceeds all the demanding capacities of the original T-Biscuit, and it accommodates the loads and fatigue increasingly associated with shear connection failure.

Understanding the additional specifications dictated by the newer, thinner, and wider double tee beam designs, company engineers consulted with V2 customers to ensure the redesigned T-Biscuit met the new requirements and was more user-friendly for installers.

The New and Improved T-Biscuit

  • Meets or exceeds precast concrete code requirements published by ACI and PCI.
  • Increases in-plane bending capacity by 330 percent over the previous product.
  • Closely mirrors the joint deflection characteristics of a standard welded connection.
  • Significantly reduces stress in the tee flange during reverse bending and in-plane movements resulting from thermal volume change.
  • Sports a new geometry that allows for the installation in all currently produced double tee beam thicknesses, and accommodates a deeper depression for the backer rod and joint sealant.

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