Project Overview 

In a multi-storey warehouse, the load increased due to changes in functions. The original 2-story partial beams would not meet the design requirements and needed strengthening. After program theory and economic and technical feasibility comparison, it was decided to use carbon fiber composite materials for strengthening.

The technology of reinforcing and repairing concrete structures with carbon fiber composite materials is a new type of strengthening technology that has emerged in recent years. The application in civil engineering mainly uses resin-like bonding materials to stick carbon fiber cloth on the surface of concrete to achieve the purpose of strengthening and reinforcement the structure and components. This technology has developed rapidly in recent years and has been widely used in many fields.

The rapid promotion of carbon fiber strengthening is due to the following technical advantages:

①High strength and high efficiency. Its axial tensile strength is 1 to 2 times that of ordinary steel;

②The construction is simple and convenient. No wet work, no large construction equipment, no on-site fixed equipment, and less construction space. The finished carbon fiber strengthening material is a fabric, which can be cut at will with scissors or blades;

③It has excellent corrosion resistance and durability, and can resist the corrosion of various acids, alkalis and salts frequently encountered in buildings;

④ Wide application. It can be widely used in the strengthening and repair of various structural types, various shapes, and various structural parts without changing the structural shape and without affecting the structural appearance;

⑤The construction quality is easy to guarantee. In terms of the material itself, since the carbon fiber material is flexible, even if the surface of the reinforced structure is not very flat, it basically guarantees an effective adhesion rate of nearly 100%;

⑥ After strengthening and repair, the weight of the original component shall not be increased. The carbon fiber material is light and thin. It weighs 1.0 kg (including resin weight) for 1 meter after pasting, and the thickness of one layer is only about 1.0 mm after pasting. Therefore, carbon fiber can also be applied to the strengthening and repair of decorative stone.

Carbon fiber structural strengthening to increase live loads in warehouses

3 layers of 300mm wide and 200g carbon fiber cloth on the bottom of the beam. The design value of the maximum bending moment of this beam has been increased by 15%.

Horse HM-20 carbon fiber wrap

Horse HM-180C3P carbon fiber adhesive

Construction effect

In the strengthening of concrete structures, carbon fiber cloth mainly shares the force of steel bars, that is, the main function of carbon fiber cloth is to improve the tensile strength and deformation resistance of structural members and reduce the development of cracks. The project took less than two months from design to completion and put into use. The construction was reinforced by carbon fiber. It only took 8 days from preparation to completion without any quality problems. The construction effect was good. The design unit and the supervision unit were awarded And praise from the owners. Practice shows that the advantages of carbon fiber material strengthening structure technology are obvious, and the application prospects are bright.