Common reinforcement method for steel structure workshop

1, steel structure workshop welding and bolt connection reinforcement

In the process of welding reinforcement, high temperature will reduce the performance of the base material at the welding site, and the internal defects of the weld will also cause new cracks in the structure, and the residual stress in the welding structure will accelerate the development of cracks. In the bolted connection reinforcement, the holes in the steel will weaken the section, form a new stress concentration area, reduce the effect of structural reinforcement.

2. Increase the stiffness of the structure or components

1) add support to form a space structure and check according to the space structure;

2) Add support to increase the structural stiffness or adjust the natural vibration frequency of the structure to improve the bearing capacity and dynamic characteristics of the structure;

3) Add support or auxiliary rod to reduce the slenderness ratio of the component to improve its stability;

4) In the frame structure, focus on strengthening the stiffness of a column, so that it can bear most of the horizontal force, so as to reduce the load of other columns

03, stick steel reinforcement

The steel plate is pasted on the surface of the structure and the structural adhesive makes the two work together to improve the bearing capacity of the steel structure. Because the steel plate should not be processed into a complex structure and poor corrosion resistance, the later maintenance cost is high.

04, paste composite material reinforcement

The damage part of steel structure is pasted with composite material by binder, which bears partial load, so as to reduce the stress of the damage part. The change of dead weight and size of the reinforced structure is small, the fatigue resistance and corrosion resistance of the composite material are good, and the construction is relatively simple, suitable for site repair.