At present, there are two advanced structural strengthening methods widely used, bonded steel plate reinforcement and FRP composite strengthening. The reinforcing principles of the two are similar: the structural glue is used to as a reinforcing material, externally bonded on the structure to form an integral structure, and work together. force. Although the two reinforcement methods are similar, but there are differences, we have to choose different reinforcement methods according to different situations.

1. The status of structural deformation

The elastic modulus of carbon fiber cloth and steel plate adhesive is the same, the tensile strength of Horse Construction's carbon fiber fabric is 8 times that of steel plate. If the structure of the building has a greater deformation, you need to use high strength carbon fiber fabric for structural strengthening. However, if the deformation is small and the load of the building components is greater, in order to reduce the stress hysteresis and ensure the material fully exert its performance, it is preferable to use the bonding steel plate reinforcement.

(strengthening with carbon FRP fabric)

2. According to the strength requirements

The elastic modulus of carbon fiber cloth and steel plate adhesive is the same. If they all have the same force, and bonded steel plate reinforcement section is relatively large. For structural rigidity enhancement, bonded steel plate reinforcement is more than carbon fiber cloth. If the bending strength is the same, steel plate reinforcement deflection and crack width is less than the CFRP reinforced;.

(steel plate bonding reinfocement)

3. Anchor

Carbon fiber reinforced cloth can not use the anchor bolt, also can not be welded, so if there is pre-installed anchor or welding needs, bonding steel plate reinforcement is more suitable.

(concrete strengthening with CFRP sheet)

4. The reinforcement environment

If the environment is harsh, such as wet and corrosion, it is recommended to use carbon fiber cloth, because the carbon fiber cloth's corrosion resistance is very good. The environment is poor, we recommended carbon fiber wrap for strengthening.

(structural strengthening adhesive for steel jacketing)

5. Reinforced structure

If the reinforcement structure is too complicated, it is recommended to use carbon fiber cloth. Carbon fiber fabric have a best feature: flexible, can be wrapped around complex shapes.

(column strengthening used carbon fiber reinfroced polymer)