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 steel and steel plates, and the joints, bolts or rivets are usually connected between the components or components. Because of its light weight and simple construction, it is widely used in large factories, stadiums, super high-rises and other fields.
The steel is characterized by high strength, light weight, good overall rigidity and strong deformability. Therefore, it is especially suitable for building large-span and super-high and super-heavy buildings. The material is homogeneous and isotropic, and it is an ideal elastomer. It is most in line with the basic assumptions of general engineering mechanics; the material has good plasticity and toughness, can have large deformation, can withstand dynamic load well; construction period is short; its industrialization degree is high, and it can carry out specialized production with high degree of mechanization. Steel structures should be studied for high-strength steels, which greatly increase the strength of the yield point; in addition, new types of steels, such as H-beams (also known as wide-flange steels) and T-shaped steels and profiled steel sheets, are required to accommodate large-span structures and The need for super high-rise buildings.
In addition, there is no thermal bridge light steel structure system, the building itself is not energy-saving. This technology solves the problem of cold and hot bridge of the building with clever special joints; the small truss structure allows the cable and the upper and lower water pipes to pass through the wall, construction The decoration is convenient.
When the steel structure is also damaged, we need to find out the immediate solution to the problem. The main factors that describe the damage of the steel structure in the steel structure network are: 1) due to load changes, overtime service, changes in specifications and procedures, resulting in insufficient structural bearing capacity; 2) components Deformation, distortion, disability, depression, etc. due to various accidents, resulting in weakened section of the member, warpage of the member, joint cracking, etc.; 3) deformation or cracking of the member or joint under temperature difference; 4) due to chemical substances Corrosion caused by corrosion and electrochemical corrosion caused the structural section of steel structural members to weaken; 5) Others include design, production, construction errors and violations of use and operation during service.
There are three main technical measures for reinforcement of steel structures: 1) Reinforcement method: Reinforce steel in part or along the length of the member, and join them together to force them together; 2) Change the calculation diagram: add additional support, adjust Load distribution, reduce the internal force level, forcibly shift the statically indeterminate structure support, reduce the stress peak; 3) Prestressed cable method: use high-strength cable to strengthen the structural weak link or improve the overall bearing capacity, stiffness and stability of the structure .