With the aging of buildings and frequent disasters, traditional reinforcement methods (such as increasing the cross-section and pasting steel plates) are gradually unable to meet the needs of modern building repair due to long construction periods and large space occupation. Carbon fiber tubes have shown significant advantages in the field of building structure reinforcement due to their high strength, light weight, and corrosion resistance.
This century-old brick and wood structure building has insufficient seismic performance due to the degradation of wall mortar strength and water seepage in the brick wall. Carbon fiber tubes are used to replace traditional steel mesh, and epoxy resin is pasted to the wall to form a tie system, avoiding the damage of the concrete reinforcement method to the appearance of the building. In the project, carbon fiber tubes are arranged along the diagonal of the wall with a diameter of 20mm and a wall thickness of 2mm, which significantly improves the integrity of the structure and saves 80% of the construction space.
In response to the problem of insufficient bearing capacity of the floor slab, the project adopts a composite reinforcement solution of carbon fiber tubes and carbon fiber cloth. Carbon fiber tubes are used as longitudinal load-bearing components, and work together with carbon fiber cloth through U-shaped hoops to form a "tube-cloth" composite system. Experimental data show that this scheme increases the bearing capacity of the floor by 40% and shortens the construction period by 60%, avoiding the impact of wet work on residents' lives.
The steel truss of the gymnasium has exceeded the limit of mid-span deflection due to long-term corrosion. Carbon fiber tubes with a diameter of 100mm are used to replace some damaged steel components, and are connected with the original structure through bolts to form a whole. The high modulus characteristics of carbon fiber tubes effectively limit structural deformation, while reducing the self-weight by 30%, reducing the secondary load on the lower structure.
The original wood structure has insufficient bearing capacity due to cracks in the top of the column, and the project uses carbon fiber tubes to reinforce the beam-column nodes. Two layers of carbon fiber cloth are pasted longitudinally, and U-shaped carbon fiber tubes are wrapped horizontally to form a constraint system. After the transformation, the shear bearing capacity of the node is increased by 2.5 times, and the original style of the wooden structure is retained, verifying the feasibility of carbon fiber tubes in the restoration of ancient buildings.
The subway tunnel has peeling lining concrete due to water leakage, and carbon fiber tubes and carbon fiber grids are used for composite reinforcement. The carbon fiber tube is arranged along the tunnel longitudinally to form an "arch skeleton", which is combined with carbon fiber grid to fill cracks, significantly improving the durability of the structure. This solution avoids tunnel shutdown and improves construction efficiency by 5 times compared to traditional methods.
The curved wall has stress concentration problems due to design defects, so the project uses customized carbon fiber tubes for reinforcement. The geometric data of the wall is obtained through 3D scanning technology, and a carbon fiber tube that fits the curved surface is processed. The vacuum infusion process is used to ensure that the resin is fully infiltrated. After the transformation, the wall stiffness is increased by 30%, and the artistic shape of the building is retained.
After the earthquake, many cracks appeared in the school building, and carbon fiber tubes were used for rapid emergency reinforcement. The construction workers cut the carbon fiber tubes on site and pasted them on the surface of the damaged components through rapid curing resin, completing the main structure reinforcement within 48 hours. This solution avoids demolition and reconstruction, and gains precious time for the resumption of classes after the disaster.
The innovative application of carbon fiber tubes in building structure reinforcement not only breaks through the limitations of traditional methods, but also shows unique value in the fields of historical building protection and emergency reinforcement. With the improvement of material performance and the optimization of construction technology, carbon fiber tube is expected to become one of the mainstream technologies for building restoration in the future, promoting the construction industry to develop in a green, efficient and sustainable direction.
