What are the protective measures for steel structure reinforcement?

Steel structure is a structure mainly composed of steel materials and is one of the main types of building structures. The structure is mainly composed of steel beams, steel columns, steel trusses and other components made of section steel and steel plates. The components or parts are usually connected by welds, bolts or rivets. Because the steel structure is relatively light, it is very easy to construct, and it is widely used in large-scale factories, stadiums, super high-rise buildings and other fields.

The steel structure will inevitably be damaged, so we need to conduct regular inspections to discover and solve problems in time. The main factors of steel structure damage are:

1. Due to changes in load, long-term use, and changes in specifications and regulations, the structural bearing capacity is insufficient.

2. Due to various accidents such as deformation, distortion, disability, and depression of steel components, the cross-section of the component is weakened, the rods are warped, and the connection is cracked.

3. Deformation, cracking and warping of components or connections caused by temperature difference.

4. Due to the corrosion of chemical substances, corrosion occurs and electrochemical corrosion causes the cross-section of steel structural members to weaken.

5. Others include errors in design, production, construction, and illegal use and operation during the service period.

There are mainly three types of reinforcement technical measures for steel structures:

1. Sectional reinforcement method: Reinforce with steel locally or along the full length of the member, and connect it into a whole to make it bear the force together.

2. Change the calculation diagram: add additional supports, adjust the load distribution, reduce the internal force level, force the displacement of the statically indeterminate structure support, and reduce the peak stress.

3. Prestressed cable method: Use high-strength cables to reinforce the weak links of the structure or improve the overall bearing capacity, rigidity and stability of the structure.