What are the common methods for reinforcing steel structures?

The steel structure reinforcement method can also be divided into direct reinforcement method and indirect reinforcement method. The direct reinforcement method mainly includes: increasing the cross-section, pasting steel plates, pasting fiber composite materials, etc. The indirect reinforcement methods mainly include: reducing the load, changing the calculation graphics, preventing crack expansion, and adding support points for reinforcement. In the design process, appropriate reinforcement methods can be selected based on the actual situation before and after the renovation, technical and economic indicators, construction feasibility, and functional use. In addition, the steel reinforcement method for steel structures can be selected according to the actual situation of the project, taking into account structural safety, convenient construction, and economic aesthetics. The main reinforcement methods are as follows: 1) Increasing the cross-section reinforcement method 2) Paste steel plate reinforcement method 3) Outsourcing reinforced concrete reinforcement method 4) Filling concrete inside steel pipe components reinforcement method 5) Pre stressing reinforcement method 6) Changing the structural system reinforcement method 7) Changing the transmission path reinforcement method Compared with concrete structure reinforcement, steel structure reinforcement has more methods and techniques, and the cost of reinforcement may differ by several times between good and bad schemes. The selection of structural reinforcement scheme is very important. A reasonable reinforcement plan should have advantages such as structural safety, technical reliability, and cost-effectiveness. There are relatively few actual cases of steel structure reinforcement. This article provides the following suggestions through analysis and discussion of actual engineering reinforcement: a. When selecting reinforcement design schemes, comprehensive analysis and comparison should be conducted, rather than reinforcing individual components one by one based on calculation results, simplifying construction and reducing costs. b. Optimize the anchoring of some beam column nodes, reduce the amount of planted reinforcement, and improve structural safety. c. To provide reference for relevant technical and engineering personnel, precautions for steel structure reinforcement construction have been summarized.