When the steel structure is also damaged, we need to find the immediate solution to the problem. The main factors that describe the damage of the steel structure 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 errors in design, production, construction, and illegal use and operation during service.
There are three main technical measures for reinforcement of steel structures: 1) Reinforcement of section: reinforcement of steel in part or along the entire length of the member, and jointing into the whole to make force together; 2) Change calculation sketch: add additional support, adjust Load distribution, reduce internal force level, force displacement of statically indeterminate structural support, reduce stress peak; 3) Prestressed cable method: use high-strength cable to strengthen structural weak link or improve overall bearing capacity, stiffness and stability of structure .
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