Language: English
Beam crack repair
carbon fiber strengthening
Carbon fiber reinforced concrete is widely used in repair and reinforcement of concrete structures, and its effect is obvious. Because the reinforcing material is thin and light, it hardly increases the size and quality of the original structure.
Project
A residential district has been built and used for many years, but recently found that there is a main beam in the basement of the negative floor. There are long cracks at the bottom of the beam along the width direction and extend to the 30mm height of the beam, and there are signs of continued expansion.
Cause analysis
Through investigation and analysis, it is found that the district management office leased the first floor berth to others for steel business, and the lessee piled a large amount of steel on the first floor. Obviously, the main reason for the cracking of the beam is that the actual load applied on the beam is far beyond its design load, resulting in structural cracks due to insufficient bearing capacity.
Carbon fiber reinforcement technology features
The reinforcing material is thin and light, hardly increasing the original structure size and its own quality.
Construction is simple and fast.
The corrosion of acid and alkali salt medium has wide application.
It can effectively seal the cracks in the concrete structure and extend the service life of the structure.
It is easy to keep the structure intact.
The carbon fiber sheet has good durability.
Effect
After the completion of the reinforcement project, after three months of continuous deformation observation, no deformation beyond the requirements of the code and no new cracks were found in the normal service state.
From the practical application of the structural reinforcement project, the use of carbon fiber reinforcement technology to achieve the purpose of structural reinforcement, while having little impact on the floor net height, does not affect the use function of the building, and achieves good results.
Summary
Carbon fiber reinforced concrete is widely used in repair and reinforcement of concrete structures, and its effect is obvious. Because the reinforcing material is thin and light, it hardly increases the size and quality of the original structure. In many cases, it can achieve special results, which is worthy of vigorous research and application.
