In recent years, with the increase of bridge vehicles and tonnage, and weathering and erosion, natural aging and other factors, the damage of bridges is serious. In the field of reinforcement, the new method of strengthening the prestressed FRP laminate is a very effective method, which can achieve twice the result with half the effort.

Prestressed FRP strip is suitable for reinforcement of reinforced concrete members subjected to bending, tension and large eccentricity with small section or insufficient reinforcement.

Prestressed FRP strip supporting bridge

1. good crack resistance and large stiffness. Due to the application of prestress to the component, the emergence of cracks is greatly delayed. Under the use of load, the component can not appear cracks or delay the cracks. Therefore, the stiffness of the component is improved and the durability of the structure is increased.

2., the vertical shear force and principal tensile stress of concrete beams can be reduced. The curved steel bar of the prestressed concrete beam can reduce the vertical shear force near the support of the beam, and the main tensile stress of the concrete section decreases as the prestress exists in the concrete section.

3. improve the fatigue resistance of the component. Because of the strong prestressed reinforcement, the stress variation caused by loading or unloading in the use stage is relatively small, so it can improve the anti fatigue strength, which is very favorable for the structure bearing the dynamic load.

Shanghai Horse Construction Co., Ltd. have 4 types prestressed FRP laminate