Basic principles to be followed in the strengthening of reinforced concrete structures

The strengthening of reinforced concrete structures is highly technical. To ensure the effectiveness of strengthening and improve the stability of the building structure, the strengthening of the building structure must be carried out in accordance with the basic principles. The following is a detailed analysis of the basic principles that need to be followed in the strengthening of reinforced concrete structures:

1) The original components need to be reasonably used in the strengthening of reinforced concrete structures

In the strengthening of reinforced concrete structures, it is necessary to make rational use of the original components, which can increase the bearing capacity of the components and strengthen the entire structure. In particular, the bearing capacity of the building structure can be significantly improved to meet the needs of building safety. For a certain building component, if it does not meet the safety requirements, the entire building structure system needs to be reinforced with strengthening methods. After the residual bearing capacity of the original building structure is fully utilized, its due performance can be fully utilized. Moreover, through technological retrofittingation, the structural safety performance of the building is higher, and the construction cost will also be reduced.

2) strengthening of reinforced concrete structures needs to deal with the relationship between the overall structure and the layout

In the process of strengthening the reinforced concrete structure, the relationship between the overall structure and the layout should be dealt with. If the reinforced concrete structure has insufficient bearing capacity, in order to improve the bearing capacity of the building structure, strengthening technology must be used to deal with it. When the strengthening is completed, the system of the building structure will change, and the rigidity and strength of the building structure will also change accordingly. When carrying out structural strengthening, it is necessary to analyze the overall structure of the building from a safety point of view, and then use reasonable technical methods to reinforce the building structure. In this way, not only the bearing capacity of the building can be improved, but the stress condition of the building structure will not be affected.

In the process of strengthening the reinforced concrete structure, local strengthening can also be adopted. If the overall result of the building cannot meet the demand, it is necessary to strengthen the building structure as a whole to reduce the requirements for temporary strengthening of the structure. In this case, the permanent strengthening of the building structure requires relatively high technical requirements.

3) Reinforced concrete structures need to adopt mature technological retrofittingation methods

strengthening of reinforced concrete structures needs to adopt mature technological retrofittingation methods, that is, actively adopt new materials and new technology, and apply mature new technologies in technological retrofittingation. Make the strengthening and retrofittingation design meet the relevant requirements and meet the stress requirements of the building structure.

4) In the strengthening of reinforced concrete structures, it is necessary to eliminate the component stress after structural strengthening

During the strengthening of reinforced concrete structures, the components will generate stress, which needs to be eliminated. In the process of strengthening the reinforced concrete structure, the original building structure must have a bearing function. When the strengthening technology is completed, the force of the building structure will be redistributed, realizing the secondary force. In order to reduce the degree of strengthening of the original structure and reduce the occurrence of strain lag, it is necessary to ensure that the performance of the reinforced concrete structure during and after strengthening can meet the requirements.

Design ideas used in strengthening and retrofitting of reinforced concrete structures

1) Reinforce the concrete frame columns in the strengthening and retrofittingation of reinforced concrete structures

In the strengthening of reinforced concrete structures, the strengthening of concrete frame columns needs to focus on the problem of insufficient strengthening. During the strengthening process, relevant factors need to be fully considered, including the space occupied by the reinforced concrete structure and the axial compression ratio. In addition, the selection of design strengthening methods should also be carried out according to construction conditions.

For example, in the process of strengthening and reforming the longitudinal strengthening of the podium corner column in the construction project, there will be a relatively large axial compression ratio margin. In this case, the technical method of outsourcing angle steel can be used. The use of this strengthening construction method can not only speed up the construction progress and ensure the quality of the construction, but also will not affect the original building concrete structure or the shape of the original building structure. The structural space of the building is not affected, and construction will not be hindered.

However, in the specific construction, the space of the building structure will not be affected. However, during the construction process, it is necessary to pay attention to the height of the core area of the beam and column. In particular, the horizontal stirrups must be reasonably controlled, and the viscose process must be controlled to ensure that the diameter of the stirrups used in the core area of the beam and column is large enough. In addition, it is necessary to drill through the beam and weld the stirrup to the outer angle steel. If the axial compression ratio of the atrium of the frame column has exceeded the prescribed limit, the section can be increased. Through modeling and continuous calculation, the section is effectively adjusted, which not only reasonably regulates the axial compression ratio and meets the limited standard, but also avoids the problem of large number of steel bars and disorderly arrangement, and avoids the frame beams from being penetrated.

2) Concrete beams need to be reinforced in the strengthening of reinforced concrete structures

In the strengthening of reinforced concrete structures, the strengthening of concrete beams is to fully consider the issue of strengthening from the secondary beam. In the process of strengthening construction, it is necessary to consider not only the technical method of increasing the section height, but also the technical method of sticking steel plates. Both of these two strengthening and retrofittingation technical methods are relatively simple in construction. For the problem of insufficient strengthening of frame beams, other methods should be adopted. For example, increase the beam height, add haunches to the beam end, adjust the amplitude of the negative bending moment at the beam end, etc., to avoid insufficient supporting force of the frame column, resulting in insufficient supporting force at the support position, resulting in the negative bending moment strengthening sticking to the steel Strong. The original support steel bars of the building are calculated to meet the relevant regulations during the configuration process, and the lower part of the beam can be reinforced to improve the bearing capacity of the beam.

In the strengthening of reinforced concrete structures, the application of bottom steel bar planting technology will be restricted by certain conditions. If the section heightening method is still used, part of the steel bar implantation treatment is required. When implanting steel bars, the key consideration is that the amount of strengthening implantation must meet the relevant technical requirements.

Conclusion

In summary, in the construction of construction projects, construction of building structures is an important content. As the pace of urban retrofittingation accelerates, the retrofittingation of building structures has become a major concern. In the process of building renovation, it is necessary to consider the bearing capacity of the building structure and strengthen the original building structure. In the process of making full use of the original building's reinforced concrete structure, it is necessary to make full use of the original bearing capacity of the building structure. Starting from the needs of building use, the building structure is reinforced and retrofittinged, which can improve the safety and reliability of the building, and the construction cost will also be reduced, which will better promote the development of the construction industry.