Dapeng Town Industrial Park, Tongshan District, Xuzhou City, Jiangsu Province, China
As a form of space structure widely used in large-span buildings, such as stadiums, exhibition halls, airport terminals, etc., mesh frame structure is favoured for its good mechanical properties and spatial adaptability. However, with the increase of use time and the influence of environmental factors, the mesh frame structure may have various damages and performance degradation, which will not only affect the normal use of the building, but may even lead to safety accidents. Therefore, effective maintenance and inspection of grid structure is the key to ensure its long-term safe and reliable operation.
1.Maintenance Technology of Net Frame Structure
Regular Appearance Inspection
Regular inspection of the net frame structure, including the inspection of rods, nodes, welds, coatings, etc., to find and deal with potential problems, so as to ensure the stability and safety of the structure.
Cleaning and Maintenance
Keeping the net frame structure clean is crucial to its durability. Regular cleaning and maintenance of the mesh frame structure should be carried out to remove dust and debris from the surface of the structure to avoid corrosion and damage to the structure. At the same time, regular repair and maintenance is required for grid structures painted with coatings or paints to ensure the integrity and protective effect of the coating.
Anti-corrosion and Anti-rust Measures
According to the material of the mesh frame structure and the use environment, make a reasonable anti-corrosion plan. The net frame structure may be affected by the natural environment and industrial environment during operation, and corrosion damage occurs. Therefore, effective measures should be taken to prevent the occurrence of corrosion damage in the process of maintenance and upkeep. For example, for metal components, technical measures such as coating protection and cathodic protection can be adopted; for non-metallic components, measures such as corrosion-resistant materials or anti-corrosion coatings can be adopted.
Inspection and Maintenance of Connection Parts
Regularly check the rods and nodes in the grid structure, including the fastening inspection of connection bolts, high-strength bolts and so on. Rods and nodes found to be loose or falling off should be fastened in time to ensure the stability and reliability of the structure.
2.Detection Technology of Net Frame Structure
Deformation Detection
Use measuring instruments such as level, total station, etc., to regularly detect the overall deformation of the net frame structure. Measure the vertical displacement, horizontal displacement and bending deformation of the bars. By comparing with the design allowable value, judge whether the structure is in a safe state.
Stress Test
Strain gauges or stress sensors are installed on the key rods of the net frame structure to monitor the stress changes of the rods in real time during use. Through stress analysis, it can understand whether the stress state of the structure is normal or not, and whether there is any local excessive stress.
Material Performance Testing
Regular performance testing of the materials of the net frame structure, including the testing of the strength, hardness, toughness and other indicators of steel. A small number of samples can be intercepted from the structure for laboratory testing, and portable testing equipment can also be used to carry out rapid testing of some of the properties on site.
Application of Non-Destructive Testing Technology
Non-destructive testing technology has an important role in the detection of network structure. For example, ultrasonic testing can be used to detect defects inside the weld, such as porosity, slag entrapment, unwelded penetration, etc.; magnetic particle testing can be used to detect surface and near-surface cracks; and radiographic testing can be used to check the quality of the weld and the inside of the rod in more detail.
In conclusion, regular inspection, cleaning, fastening and deformation monitoring, as well as effective measures to prevent the occurrence of corrosion damage. In this way, problems in the mesh frame structure can be detected in time, ensuring the safe and reliable operation of the mesh frame structure within its designed service life, and safeguarding the safety of people and property.
