by Due to the poor fire resistance of steel structure, the yield strength and elastic modulus of steel decrease rapidly due to the increase of temperature.
In recent years, large-scale fires have caused serious losses to people’s life and property.
Therefore, the damage of steel structure after fire must be scientifically inspected and identified.
So, what tests should be carried out on steel structure components after fire? 1.
Appearance inspection of steel structure components: inspect the appearance of main components of steel structure on site, and observe whether there are phenomena such as coating falling off and component bending deformation.
2.
The lateral displacement of steel column is measured by theodolite and the deflection of beam is measured by total station.
3.
The mechanical properties of components are tested.
The samples of components damaged after the fire are randomly selected at the site and brought back to the laboratory for the mechanical properties of components to judge whether they meet the mechanical properties standards.
4.
Structural calculation and component check according to the field measurement and design drawings, considering the dead load, live load, wind load, snow load and seismic load, the main structure model of the plant is constructed and checked.
5.
According to the test results of steel structure after fire and combined with mechanics, the bearing capacity of steel members after fire is analyzed, and the grade evaluation of steel members after fire is carried out.
6.
Issue the main appraisal conclusions, formulate the post disaster treatment plan for the damaged components as soon as possible, repair the main structures in the affected areas, and do a good job in fire prevention in the subsequent use process.
Guangdong Fangshi house inspection and appraisal house safety appraisal and inspection Zhang Gong: 16620023371..
