Although steel structure engineering buildings have the advantages of sturdiness and durability, they will also be aged and damaged over a long time, which involves the problem of maintenance and reinforcement. Hebei Tongchuang steel structure sorted out the relevant introduction on the damage causes and reinforcement measures of steel structure.

钢结构工程建筑损坏的主要因素有：

The main factors of building damage of steel structure engineering include:

1、由于化学物质的侵蚀而产生腐蚀以及电化学腐蚀致使钢结构构件截面削弱；

1. Corrosion and electrochemical corrosion caused by chemical erosion weaken the section of steel structural members;

2、其它包括设计、生产、施工中的失误及服役期中的违规使用和操作等。

2. Others include mistakes in design, production and construction, and illegal use and operation during service.

3、由荷载变化，超期服役，规范和规程改变导致结构承载力不足；

3. The structural bearing capacity is insufficient due to the change of load, extended service and the change of codes and regulations;

4、钢结构工程构件由于各种意外产生变形、扭曲、伤残、凹陷等，致使构件截面削弱，杆件翘曲，连接开裂等；

4. Deformation, distortion, disability and depression of steel structure engineering components due to various accidents, resulting in weakening of component section, warping of members, connection cracking, etc;

5、温差作用下引起构件或连接变形、开裂和翘曲。

5. Deformation, cracking and warpage of components or connections caused by temperature difference.

钢结构工程建筑加固技术措施主要有三种：

There are three main technical measures for building reinforcement of steel structure engineering:

1、截面补强法：在局部或沿构件全长以钢材补强，连成整体使之共同受力；

1. Section reinforcement method: steel is used for reinforcement locally or along the whole length of the member, which is connected as a whole to make it bear force together;

2、改变计算简图：增设附加支承，调整荷载分布情况，降低内力水平，对超静定结构支座进行强迫位移，降低应力峰值；

2. Change the calculation diagram: add additional support, adjust the load distribution, reduce the internal force level, force the displacement of the statically indeterminate structural support and reduce the peak stress;

3、预应力拉索法：利用高强拉索加固结构薄弱环节或提高结构整体承载力、刚度和稳度。

3. Prestressed cable method: use high-strength cable to strengthen the weak links of the structure or improve the overall bearing capacity, stiffness and stability of the structure.

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