There are many ways to reinforce and retrofitting structural members, but they abide by the following principles.

Structural Strengthening strength and selection principle

1.The material strength of the original structure is used as follows: the material types and properties of the original structure are in accordance with the original design, and are used according to the original design (or standard) values; when the original structure has no material strength data, the measured material strength grade should be calculated according to the current specification.

2.Structural Strengthening material selection:

Reinforcing materials should be selected as lightweight and high-strength materials with good working properties.

The overall effect of program development

When formulating a reinforcement plan, the overall effect of the reinforced structure should also be considered in addition to the reliability assessment conclusions and reinforcement contents and items. For example, the reinforcement of a pillar or wall of a house sometimes alters the dynamic characteristics of the entire structure, creating a weak layer and adversely affecting the earthquake. Therefore, when formulating the reinforcement plan, it is necessary to fully analyze the stress of the entire building structure.