Reinforcement design principles

1. When the reliability appraisal confirms that the steel structure needs to be reinforced, the reinforcement design shall be carried out in accordance with the standards and regulations based on the appraisal conclusion and the requirements put forward by the property owner. The scope of the reinforcement design can be determined according to the entire building or an independent section of it, or according to the designated structure, component or connection, but the overall stability of the structure should be considered.

2. The safety level of the reinforced steel structure shall be determined by the property owner and the designer in accordance with the actual situation in accordance with the severity of the structural damage, the importance of the structure and the service life of the reinforcement design.

3. The reinforcement design of the steel structure warehouse should be closely integrated with the actual construction methods, and effective measures should be taken to ensure that the new components and components are reliably connected to the original structure, and the new section and the original section are firmly combined to form an overall joint work; Unreinforced parts, as well as related structures, components, and foundations cause adverse effects.

4. For damage to the original structure caused by factors such as high temperature, high humidity, low temperature, freezing and thawing, chemical corrosion, vibration, temperature stress, shrinkage stress, uneven foundation settlement, etc., effective prevention and control measures should be proposed in the reinforcement design, and should Governance and reinforcement shall be carried out in the order specified by the design.

5. The reinforcement design of steel structure warehouses should comprehensively consider its technical and economic effects, and should not reinforce structures with poor repairability, and should not lead to unnecessary dismantling or replacement.

6. For steel structures that may be inclined, unstable, excessively deformed or collapsed during the reinforcement process, effective temporary safety measures shall be proposed in the reinforcement design documents.

Reinforcement method and coordinated use technology

1. The reinforcement of steel structure warehouses can be divided into two types: direct reinforcement and indirect reinforcement. When designing, suitable reinforcement methods and technologies can be selected according to actual conditions and use requirements.

2. Direct reinforcement should be selected according to the actual situation of the project to increase the section reinforcement method, stick steel plate reinforcement method and combined reinforcement method.

3. Indirect reinforcement should be adopted to change the structural system reinforcement method and the pre-stressed reinforcement method according to the actual situation of the project.

4. The connection method for steel structure reinforcement should adopt welding seam connection and friction type high-strength bolt connection; it can also adopt the mixed connection of welding seam and friction type high-strength bolt.

5. The technology used in conjunction with the structural reinforcement method should adopt the connection technology and repair and repair technology that meet the requirements of this standard.