GB/T 37784-2019 in English
VALIDIn-situ test method for detection of structural risk of the insulating glass
- Issued on:2019-08-30
- Implemented on:2020-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$214.00
《GB/T 37784-2019中空玻璃结构安全隐患现场检测方法》由TC255（全国建筑用玻璃标准化技术委员会）归口，主管部门为中国建筑材料联合会。
Introduction
GB/T 37784—2019 In-depth interpretation of on-site detection methods for safety hazards of insulating glass structures
Background of standard formulation and analysis of technological evolution
Insulating glass has been widely used in modern buildings due to its excellent thermal insulation performance. However, sealing failure may lead to safety hazards in the insulating glass structure, threatening building safety and the lives and property of users. The formulation of GB/T 37784—2019 fills the gap in on-site detection methods for the safety of insulating glass used in buildings and provides a scientific technical basis for the industry.
This standard is based on relevant research and technical accumulation at home and abroad, combined with actual engineering needs, to form a complete detection technology system. Its core is to evaluate the difference in the bearing deformation performance of insulating glass under different load conditions through the relative comparison method of deflection, so as to determine whether there are structural safety hazards.
Comparative analysis of standard frameworks
| Standard dimensions | GB/T 37784—2019 | International similar standards | Main differences |
|---|---|---|---|
| Detection principle | Relative comparison method of deflection | Pressure balance test method | Applicable to differentiated analysis of different seal failure states |
| Loading device | Lever-weight loading device | Hydraulic loading system | More suitable for on-site detection environment |
| Risk judgment criteria | Comparison of proximity values ($\eta_{\mathrm{hf}}$ and $\eta_{\mathrm{hp}}$) | Analysis of stress-strain curves | More suitable for rapid on-site assessment |
Interpretation of detection methods and technical details
Loading device installation steps:
- Install the concentrated load loading device as shown in Figure 1, ensuring that the elastic loading ball is aligned with the center of the plate on the direct load-bearing surface of the insulating glass.
- Measure and record the distances of $H$, $d$, $L$ and $S$, accurate to $1.0\mathrm{mm}$.
Loading and thickness measurement:
- Calculate the vertical load $P$ after applying the weight according to formula (3) to ensure that the maximum allowable mass $M_{\mathrm{max}}$ and the minimum allowable mass $M_{\mathrm{min}}$ meet the requirements.
- Measure the thickness of the spacer layer $h$ at point A of the insulating glass after loading, and calculate the proximity values $\eta_{\mathrm{hf}}$ and $\eta_{\mathrm{hp}}$.
Implementation suggestions and precautions
1. Before testing, ensure that the on-site environment is stable and the temperature and humidity conditions meet the standard requirements.
2. When selecting a suitable loading device, give priority to the lever-weight device because of its simple structure and strong adaptability.
3. In actual operation, it is recommended to combine the contents of Appendix A and Appendix B to carry out special treatment of special-shaped and curved insulating glass.
4. The test report should record the test results in detail and clearly mark the calculation process of the risk criterion.
Risk criterion summary
When $\eta_{\mathrm{hf}} < \eta_{\mathrm{hp}}$, there is a structural safety hazard in the insulating glass. This criterion combines the actual load conditions and theoretical calculation results to ensure the scientificity and reliability of the test results.
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