It is understood that at present, the number of bridges in China has exceeded 800,000, and the cumulative length is more than 10,000 kilometers. The bridge has obviously become a business card of the city to some extent, and with the continuous use and the rapid increase of traffic volume, a large number of bridges are under high-load operation. Many bridges have structural cracking. Their bearing capacity is reduced, and the degree of danger is greatly deepened. Especially for long-span bridges, the situation is more serious. How to improve this situation?
In recent years, the prestressed carbon sheet reinforcement technology has achieved good reinforcement effects on long-span bridge structures. As a strong promoter of prestressed carbon sheet reinforcement technology, Nanjing Mankate has successfully applied this technology on many high-speed bridges in China in recent years. Why can Mankate prestressed carbon board technology succeed in large-span structures such as bridges?
What are the advantages of Mankate prestressed carbon sheet technology?
1.It is a more effective reinforcement method than ordinary carbon fiber carbon plate reinforcement.
The bending experiments conducted by the University of Fribourg in Switzerland on the same set of concrete beams proved that ordinary concrete beams and concrete beams reinforced with ordinary carbon fiber carbon sheets are prone to yield failure and peeling damage of steel bars under strong external force. The bearing capacity of concrete beams reinforced with prestressed carbon fiber carbon sheets is greatly improved. It can be seen that the prestressed carbon fiber carbon plate reinforced concrete structure has obvious advantages.
Prestressed carbon fiber carbon board, change passive reinforcement for active reinforcement:
1. Let the new and old components work together
2. Give full play to the high strength performance of carbon fiber carbon board
3. Solve the phenomenon of stress lag
2.It is a more stable prestressing system than ordinary carbon fiber carbon plate reinforcement.
The elastic modulus of carbon fiber material is similar to that of steel bar, but the strength is 5 times that of steel bar. Therefore, when carbon fiber material exerts its strength, the deformation is large. When the steel plate yields or concrete breaks, the strength of carbon fiber has not been fully exerted; and the prestressed carbon fiber reinforcement technology can solve this problem better and greatly improve the utilization rate of carbon fiber materials. The Mankate prestressed carbon fiber carbon board anchoring system can reduce the deflection of the structure and reduce and seal the crack while increasing the strength and rigidity of the structure.
3.It is a more durable prestressing system than ordinary carbon fiber carbon board reinforcement.
Compared with prestressed steel strands and other defects such as rust corrosion, electrode corrosion, thermal expansion and contraction, bending stress loss, and complicated construction, the prestressed carbon fiber carbon board system exhibits strong reinforcement advantages, and it has acid and alkali resistance. It is a more durable prestressed reinforcement system with stable performance of salt and carbon fiber, good long-term performance of glue, low stress loss and convenient construction.
The correct method has been successful to some extent. Nanjing Mankate prestressed carbon fiber carbon board technology has been widely used in Chongqing Yuzhong District overpass, Nanjing Dabaoen Temple Millennium Stone Monument, Gongzhuling Bridge prestressed carbon board reinforcement project, etc. It has been widely praised by the companies. Nanjing Mankate, the guardian of the long-span bridge, the intimate butler around you ~ Mankate one-stop service hotline: 400-894-5118
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(Editor: Nanjing Mankate, if you need to reprint, please indicate the source)
