Enhanced research on holographic flaw detection, representing the direction of non-destructive testing, to promote its early application in the current non-destructive testing field. Strengthened studies on the impact of various defect types and sizes on the bearing capacity of welds, preparing for the formulation of a grading evaluation standard for the quality of building steel structure welds. Established standards for the acceptance and evaluation of non-destructive testing of building steel structures.
Steel structure load-bearing inspection, structural inspection determination inspection, and routine inspection are all prepared by inspection personnel based on on-site practice. Routine inspection items include strength testing, reinforcement arrangement testing, building deformation testing, crack testing, and other inspections. Different structures have corresponding structural inspection methods with varying emphases, such as reinforced concrete structures should focus on concrete quality, reinforcement arrangement, cracks, and concrete durability; masonry structures should focus on masonry strength, mortar strength, structural cracks, and wall corrosion; steel structures should focus on overall and partial deformation testing, non-destructive testing of welds, section size, and structural investigation. The foundation and upper load-bearing parts should be inspected separately. The upper load-bearing section should ensure the suitability of on-site testing conditions to select non-destructive testing or inspection. Taking concrete testing methods as an example, the range of detection deviation of the commonly used concrete strength testing methods in our country is shown in Table 1. From the table above, it can be seen that in our country, the core drilling method is close to the actual strength grade in concrete strength testing, but due to the large impact range and construction volume of the test, the ultrasonic rebound method is usually preferred. However, when there is a dispute over the test values or legal determination, the core drilling method is often used. As an unpredictable random variable, the design load standard determined by the load is 50 years. During this period, not only the magnitude of the load.
Steel Structure Intermediate Layer Inspection and Certification Company - Key Seismic and Noise Inspection Items:
1) Field testing of concrete layout strength (ultrasonic rebound comprehensive method, rebound method, core drilling method, etc.).
2) Field masonry mortar strength testing (penetration method, rebound method, etc.)
3) Field Masonry Strength Testing (In-Situ Axial Compression Method)
4) Reinforcement sheath thickness inspection (non-destructive testing)
5) Static Load Test on Concrete Components (deflection, crack resistance, bearing capacity, crack width)
6) Concrete post-installed anchor pull-out capacity testing
7) Structural deformation detection (tilting, cracks, etc.)
8) Concrete Surface Quality and Defect Inspection (Ultrasonic Testing)
9) Masonry Layout Deformation and Defect Detection (cracks, weathering, spalling, verticality)
10) Structural Dynamic Testing
11) Chloride ion content testing
12) Reinforcement Steel Corrosion Electrochemical Inspection
The column with low梁stiffness is more severe when under compression, transitioning from initial shear deformation to shear-bending deformation. The bending moment within the column is a higher proportion of the actual bending moment of the beam. At the same time, the construction period is extended, affecting the magnitude of the participation factors for various vibration modes. The occurrence of the dynamic coefficient leads to the bending moment of the column, as the actual strength of the beam increases due to the artificial reinforcement design in the plan. This results in the bending moment within the column when the beam exhibits a plastic hinge. After the structural plastic hinge is formed, the aforementioned reasons still exist, and the subsequent inelastic process is the further development of the dynamic coefficient. The column bending moment varies with the dynamic coefficient. The overturning moment caused by the dynamic coefficient alters the actual axial force within the column.
Anshan Kindergarten Safety Inspection; Kindergarten Building Safety Assessment Plan
Xuzhou Factory Quality and Safety Inspection Company, Quality Requirements for Steel Structure Factory, Integrated Solution
Taizhou Factory Quality and Safety Inspection, Factory Warehouse Quality Inspection, On-Site Survey
Gannan Factory Load-Bearing Inspection, Post-Sale Assurance
Kunming Kindergarten Safety Assessment, Kindergarten Building Safety Assessment Criteria
Earthquake Resistance Testing for Buildings, On-Site Inspections, Fuzhou Factory Renting Safety Inspection Agency
