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How to strengthening the opening of beam
If it is determined that only part of the main reinforcement is broken, then it can be strengthened by bonding carbon fiber cloth or steel plate. Specific parameters of carbon cloth and steel plate need to be calculated by professional design institute. However, it should be noted that the earlier the reinforcement is, the more advantageous it is for the structure to bear force.
When the house is installed with air-conditioning or other equipment, the builder often opens holes in the beams, which causes the owner's inner panic. So how to deal with this situation?
After this happens, we should first determine whether to break the main reinforcement. If the main reinforcement is not broken during the opening process, only individual stirrups are broken, and the opening is small, so that no reinforcement treatment can be carried out.
But the reinforcement treatment does not have no effect on the structure at all, but the hole is relatively small, and the impact on the structure is relatively small. Considering that the structure will have a certain safety factor in design, it can not be reinforced.
If it is determined that only part of the main reinforcement is broken, then it can be strengthened by bonding carbon fiber cloth or steel plate. Specific parameters of carbon cloth and steel plate need to be calculated by professional design institute. However, it should be noted that the earlier the reinforcement is, the more advantageous it is for the structure to bear force.
If all the reinforcing bars are broken in the opening, this situation is more dangerous. Because the lower reinforcement mainly plays the role of bending resistance and the main reinforcement is broken, there is a great hidden danger in this beam. Because the bonded steel sheet and carbon fiber sheet are not suitable for plain concrete and members with a reinforcement ratio of less than 0.2% on one side of the longitudinal reinforced bar, it is also not suitable for the bonded carbon fiber sheet and the bonded steel sheet when all the main bars are interrupted. In this case, it is more appropriate to increase the cross-section reinforcement. The concrete reinforcement force calculation should be carried out by a professional design unit.
Under no circumstances should the structure be destroyed privately. If you want to reform the structure, you need to follow a formal procedure, find professional design institutes, formal construction units, quality-oriented material manufacturers in order to ensure the safety of the structure.
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High strength, unidirectional carbon fiber fabric pre-saturated to form a carbon fiber reinforced polymer (CFRP) fabric used to strengthen structural concrete elements.
High strength, unidirectional carbon fiber sheet pre-saturated to form a carbon fiber reinforced polymer (CFRP) sheet used to strengthen structural concrete elements.
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