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Maintenance and maintenance of steel structure

1. Regular rust and anti -corrosion protection
Generally, the steel structure is 5O-70 years in the design and use period. During the use of steel structure, the chances of damage due to super load are small. Most steel structure damage is caused by reduction of structural mechanics and physical properties caused by rust. The “Snueling of Steel Structure Design” has certain requirements for steel structure anticorrosion that has been used for more than 25 years. Therefore, it is required to meet the requirements of the steel structure outside the steel structure. Generally, the steel structure takes 3 years to maintain maintenance (cleaning the dust in the steel structure, the rust, and other dirt before brushing the coating). The varieties and specifications of the paint should be the same as the original coatings, otherwise the two coatings will not be compatible will bring greater harm, and users should be well maintained and maintained in a planned manner.
Preventing steel structure rust: In the later period of maintenance and maintenance, non -metal coating protection method is particularly commonly used. It is protected by coatings and plastic on the surface of the component, so that it does not contact the surrounding corrosive media to achieve the purpose of anticorrosion. This method has good effects, low prices, and many varieties of coatings. It is available for a wide range of selection, strong applicability, and restrictions on the shape and size of the component. The component is retracted and easy to use. You can also give the components a beautiful appearance.

2. Regular fire treatment protection
The temperature resistance of steel is poor, and many properties change with the temperature. When the temperature reaches 430-540 ° C, the yield point, tensile strength and elastic modulus of steel will drop sharply and lose the carrying capacity. It is necessary to use the refractory material to maintain the steel structure. It was not previously treated with fireproof coatings or fireproof paint. The refractory capacity of the building depends on the fire resistance of the building component. When the fire occurs, its carrying capacity should be able to continue for a certain period of time, so that people can safely evacuate, rescue materials and extinguish the fire.
The fire prevention measures are: so the exposed steel component brushing fire prevention coatings, the specific requirements are: the refractory time of the steel beam is 1.5h, and the refractory time of the steel column is 2.5h, which makes it meet the requirements of architectural specifications.

3. Regular deformation monitoring and maintenance
The destruction of the steel structure rust to the component is not only manifested as the thinning of the effective section of the component, but also the “rust pit” generated by the component surface. The former reduced the loading capacity of the component, which caused the overall bearing capacity of the steel structure to decrease, and the structure of thin -walled steel and light steel was particularly serious. The latter causes a “stress concentration” phenomenon of steel structure. When the steel structure may occur, the steel structure may suddenly occur suddenly. There is no deformation signs when this phenomenon occurs, and it is not easy to detect and prevent in advance. To this end, stress, deformation and crack monitoring of steel structures and major components are very important.
Deformation monitoring: If the steel structure is excessive deformation during the use stage, it indicates that the carrying capacity or stability of the steel structure can no longer meet the needs of the use. At this time, the owner should be attached enough to quickly organize relevant people in the industry to analyze the cause of deformation. The governance plan is proposed and implemented immediately to prevent greater damage to the steel structure engineering.

4. Regular examination and maintenance of other diseases
When performing daily management and maintenance of steel structure engineering, in addition to paying attention to the inspection of rust disease, you should also pay attention to the following aspects:
(1) Whether the connection of welds, bolts, rivets, etc. occurs at the connection of cracks, loosening, and fractures such as cracks.
(2) Whether the components such as each pole, the abdomen, the connection board, etc. have local deformation too much and whether there is any damage.
(3) Whether the entire structure deformation is abnormal and whether there is a normal deformation range.
Daily management inspection and maintenance: In order to timely discover the above -mentioned diseases and abnormal phenomena and avoid serious consequences, the owner must conduct a regular inspection of the steel structure regularly. While grasping its development and changes, the cause of the formation of disease and abnormal phenomena should be found. If necessary, through the correct theoretical analysis, it is obtained from the impact of the strength, stiffness, and stability of the steel structure.

Post time: Oct-26-2022