钢结构工程加固的主要措施有：
The main reinforcement measures for steel structural engineering include:
(1)减轻荷载、改变钢结构设计图形、加大原结构构件截面和连接强度、阻止钢结构链接裂纹扩展等不利条件的产生。当有成熟经验时，也可采用其他的加固方法。经鉴定需要加固的钢结构工程，根据损害范围一般分为局部加固和全面加固。
(1) The occurrence of unfavorable conditions such as reducing loads, changing the design graphics of steel structures, increasing the cross-sectional area and connection strength of original structural components, and preventing the expansion of steel structure connection cracks. When there is mature experience, other reinforcement methods can also be used. According to the damage scope, the steel structural engineering identified to need reinforcement can be generally divided into local reinforcement and comprehensive reinforcement.
(2)局部加固是对某承载能力不足的杆件或连接节点处进行加固，有增加杆件截面法、减小杆件自由长度法和连接节点加固法。
(2) Local reinforcement refers to the reinforcement of a member or connection node with insufficient load-bearing capacity. There are methods such as increasing the section of the member, reducing the free length of the member, and strengthening the connection node.
(3)全面加固是对整体结构进行加固，有不改变结构静力计算图形加固法和改变结构静力计算图形加固法两类。
(3) Comprehensive reinforcement refers to the reinforcement of the overall structure, which can be divided into two types: reinforcement without changing the static calculation pattern of the structure and reinforcement with changing the static calculation pattern of the structure.
(4)增加或加强支撑体系，也是对结构体系加固的有效方法。
(4) Adding or strengthening support systems is also an effective method for strengthening structural systems.