The tensile strength of carbon fiber reinforced cloth is ≥3400Mpa, which is 10 times that of steel; the service life is more than 50 years, and it is not afraid of acid and alkali corrosion; the reinforced floor has high applicability and good economy.

Before sticking the carbon fiber cloth, you should first unload or remove the live load acting on the structure. If the load is not removed, the reinforced structure will bear the force of the concrete floor and live load. If it is attached to the carbon fiber cloth at this moment, the carbon fiber cloth does not bear the force, so its effect cannot be fully utilized. Only by sticking with carbon fiber cloth can it bear the strength to achieve the purpose of reinforcement, and the raw materials are consumed at a certain level. Therefore, the carbon fiber cloth can withstand the force immediately and give full play to its strong characteristics. The increase in bearing capacity of the floor slab reinforced with carbon fiber cloth should not exceed 40%.

When reinforced concrete structural members are reinforced by sticking steel or pasting carbon fiber cloth, the increase in the bending bearing capacity of the front section should not exceed 40%. The shear bearing capacity should be checked to avoid the shear failure of the component before the bending failure due to the increase in the bending bearing capacity. The purpose is to manipulate the crack width and deformation of the reinforced components, and also to focus on the necessity of the design principle of "strong shear and weak bending".

Assuming that the bending moment that the member can withstand before reinforcement is M0, the larger bending moment Mj that can be supplemented by carbon fiber reinforcement can be calculated in advance. In other words, if the error is small, the effect of flexural strength reinforcement of carbon fiber materials is relatively limited. Sticking a large amount of carbon fiber materials can not improve the flexural strength work ability, but only creates super-reinforced cross-sections that are not allowed by the standard.

There is a definition of structural seismic grade design scheme called "strong shear and weak bending". The implication is that the shear stress matching the bending bearing capacity of the normal cross-section of the concrete structural member is less than the design plan stipulating the shear bearing capacity of the oblique cross-section of the member. The structural component does not want to produce cutting damage before the bending damage occurs, so as to improve the seismic performance of the component itself. In layman's terms, bending damage is delayed damage, which first manifests as cracks and deflection with warning signs. The shear failure is brittle failure without warning, occurs instantaneously, and is more dangerous. Therefore, we need to artificially control the dangerous source of this greater damage.

From the perspective of engineering construction, the thickness of bonded steel or carbon fiber cloth is not suitable for being too thick. For the bonded steel, the reinforcement of the thick steel plate should not exceed 3 and 4 layers in the tension zone and the stress zone respectively, and the total thickness of the thick steel plate should not exceed 10 mm. As everyone knows, the reinforcement of the pasted carbon fiber cloth cannot exceed 2 layers for the preformed board, and it is not suitable to exceed 4 layers for the wet-molded textiles. When more than 4 floors, the use of carbon fiber materials for reinforcement should be considered, and reliable reinforcement reinforcement anchoring measures should be adopted.

Many construction units prefer to use carbon fiber reinforcement when choosing a reinforcement method. The construction process of carbon fiber cloth prestressing and carbon fiber cloth pasting is relatively simple. The method of selecting mechanical equipment and manual production is closely combined, and the actual operation is convenient and reliable. Carbon fiber reinforcement is basically carried out on the original components. The cross-sectional specifications of the original structure, the reinforcement diagram, and the strength level of the concrete limit the full performance level. Therefore, it is necessary to understand how much load-bearing capacity can be improved by carbon fiber reinforcement.