1. Misconceptions in Reinforcement and Reconstruction of Building Structures

Because of the lack of overall checking calculation in the reinforcement and reconstruction design, the part of the building that has been strengthened and reconstructed is too strong and the part that has not been strengthened is very weak. The whole building can not coordinate its work and can not meet the requirements of seismic bearing capacity. Therefore, it is suggested that the whole calculation design should be done for the reinforced and reconstructed buildings.

2. Errors in Reinforcement and Reconstruction of Building Structures II

Without considering the stiffness requirement, new damage will occur due to insufficient stiffness and large deformation after reinforcement. Especially for some structural modifications, such as insufficient beam height when supporting beam and pulling out column, continuous beam and slab have become simply supported beam and slab when partial beam and slab are dismantled. It is very dangerous to dismantle without considering structural reinforcement.

3. Misconceptions in Reinforcement and Reconstruction of Building Structures 3

In the design of rebuilding brick-concrete structure into inner frame, the method of adding foundation, beam, slab and column, and then dismantling inner wall and each layer of slab is not adopted, but the inner wall and slab are dismantled first in construction, resulting in instability of external wall. Despite the addition of temporary support, its support will affect the construction space and the deformation will be difficult, and there will be unsafe factors in the reconstruction construction.

4. Misconceptions in Reinforcement and Reconstruction of Building Structures 4

When the outer steel is used for reinforcement, the bonding glue is used in the outer steel and then welded, which results in the burning of the bonding glue or neglect of the bonding glue, the unqualified glue is used, and the cement mortar is used instead of the bonding glue.

5. Misconceptions in Reinforcement and Reconstruction of Building Structures 5

It is believed that the effect of adhesives without anchorage measures, or even though anchorage measures are added, the shear capacity of reinforced concrete is low because the strength of reinforced concrete is not taken into account. The hidden danger caused by the low bonding ability and other factors still exists, which leads to the failure of bonding after bonding and reinforcement, separation and shear, and new hidden danger or sudden damage in the process of structure use.

6. Misconceptions in the Reinforcement and Reconstruction of Building Structures 6

It is emphasized that it is necessary to implement the provisions that should not be violated in the new construction codes so that they can not be reinforced or laissez-faire, and that there are no scientific treatment measures to make the reinforced joints and structures unreliable and so on, to two extremes.

Building reinforcement and reconstruction projects need professional construction team and high quality reinforcement materials. Otherwise, it will lead to lax process control, chaotic process, no unloading measures, no monitoring behavior and so on. As a result, there are potential safety hazards in construction or after construction, unqualified inspection and material performance requirements can not meet the corresponding specifications.