The safety and quality inspection and identification of steel structures mainly includes the following steps:
Visual inspection: Judge whether there are quality problems in the steel structure by directly observing the appearance and surface conditions of the steel structure, such as checking whether there are problems such as rust, deformation, cracks, etc.
Non-destructive testing: the use of sound waves, electromagnetic waves, ultrasonic waves and other methods to detect the quality of steel structures, does not affect the use of steel structures. For example, ultrasonic testing can detect cracks, porosity and other problems inside the steel structure to determine the quality of the structure.
Physical test: Through the load test, the bearing capacity, deformation and other issues of the steel structure can be determined, and its safety and stability can be evaluated.
Steel quality inspection: test the composition, mechanical properties, surface quality and other aspects of the steel to ensure that the quality of raw materials meets the standard requirements.
Weld quality inspection: Weld quality inspection of steel structures, including welding quality, carbon equivalent, etc.
Bolt joint detection: The bolted connection of the steel structure is tested to ensure the reliability and safety of the connection.
Structural dynamic characteristics testing: The dynamic characteristics of steel structures are tested, including the natural frequency of the structure, the damping ratio, etc.
Structural damage detection: Damage detection of steel structures is carried out through vibration testing, acoustic emission technology and other methods to determine whether the structure is damaged.
Structural stability testing: testing the stability of the steel structure, including overall stability, local stability, etc.
Structural fatigue testing: Fatigue testing is carried out on steel structures to determine the fatigue performance of the structure under cyclic loading.
Anti-corrosion coating inspection: Detect the anti-corrosion coating of the steel structure, including the thickness and adhesion of the coating.
Lightning protection detection: Detect the lightning protection facilities of the steel structure, including lightning rods, lightning belts, etc.
After completing the above steps, it is necessary to evaluate the safety of the steel structure according to the relevant standards and specifications, and put forward corresponding reinforcement or maintenance suggestions.