Main Factors of Steel Structure Damage and Its Reinforcing Technical Measures

 The main factors of steel structure damage are:

(1) Insufficient bearing capacity of the structure caused by load changes, extended service, and changes in codes and regulations;

(2) The component is deformed, twisted, disabled, dented, etc. due to various accidents, resulting in weakening of the section of the component, warping of the rod, cracking of the connection, etc.;

(3) Deformation, cracking and warping of components or connections caused by temperature difference;

(4) The cross-section of steel structural members is weakened due to corrosion caused by chemical corrosion and electrochemical corrosion;

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

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

(1) Cross-section reinforcement method: Reinforce with steel in part or along the whole length of the member, and connect them into a whole to make them bear common force;

(2) Change the calculation diagram: add additional supports, adjust the load distribution, reduce the level of internal force, and force the displacement of the statically indeterminate structural supports to reduce the stress peak;

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