Language: English
Strengthening Bridges
Prestressed Carbon Plate Circular Anchorages
During the long-term use of the bridge, due to factors such as increased traffic flow and natural environmental impact, some beams have developed cracks and deflection, requiring reinforcement treatment to improve their bearing capacity and durability.
1、 Engineering background
During the long-term use of the bridge, due to factors such as increased traffic flow and natural environmental impact, some beams have developed cracks and deflection, requiring reinforcement treatment to improve their bearing capacity and durability.
2、 Reinforcement scheme selection
After technical demonstration and economic comparison, it has been decided to adopt the circular anchor prestressed carbon fiber laminate reinforcement technology. This technology has the following advantages:
High strength: Carbon fiber laminate has high strength and can significantly improve the load-bearing capacity of the structure.
Lightweight: Carbon fiber materials are lightweight and do not increase the self weight burden of the structure.
Corrosion resistance: It has good corrosion resistance and is suitable for various harsh environments.
Convenient construction: Circular anchors are easy to install and can quickly complete reinforcement construction.
3、 Construction process
Surface treatment: Clean and polish the surface of the beam to remove loose concrete and oil stains, ensuring the bonding strength between the carbon fiber laminate and the beam.
Installation of Anchors: Install circular anchors at both ends of the beam, which are connected to the beam through bolts to ensure firmness and reliability.
Laying carbon fiber laminate: Thread the carbon fiber laminate through the anchor and lay and position it according to the design requirements.
Apply prestress: Use specialized tensioning equipment to apply prestress to the carbon fiber laminate, so that the carbon fiber laminate and the beam are jointly stressed.
Anchor treatment: After the prestressing is applied, anchor the anchorage device to ensure the long-term stability of the prestressing of the carbon fiber laminate.
4、 Reinforcement effect
After reinforcement, the bearing capacity of the bridge has been significantly improved, cracks have been effectively controlled, and the phenomenon of deflection has been significantly improved. Meanwhile, due to the corrosion resistance of carbon fiber laminate, the service life of the bridge has been extended.
