Steel structure is mainly composed of steel materials, which is one of the main types of building structure. 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 of its light weight and simple construction, it is widely used in large factories, stadiums, super high-rise buildings and other fields.
When the steel structure is also damaged, we need to find immediate solutions. The main factors of steel structure damage introduced by steel structure net are: 1) insufficient bearing capacity of the structure caused by load change, overdue service, change of codes and regulations; 2) deformation, distortion, disability, depression of the component due to various accidents, resulting in weakening of the component section, warping of the member, cracking of the connection, etc. 3) deformation, cracking and warping of components or connections under the action of temperature difference; 4) corrosion caused by chemical substances and electrochemical corrosion, resulting in weakening of steel structure components section; 5) other errors in design, production and construction, as well as illegal use and operation during the service period, etc.
There are three kinds of strengthening technical measures for steel structure: 1) section reinforcement method: steel reinforcement method is used in part or along the whole length of the component to make it bear the force together; 2) change the calculation diagram: add additional support, adjust the load distribution, reduce the internal force level, carry out forced displacement for the support of statically indeterminate structure and reduce the stress peak; 3) prestressed cable method: use high-strength cable Strengthen the weak link of the structure or improve the overall bearing capacity, stiffness and stability of the structure.