Mathematical Methods of Glazing Designing

Alexander G. Chesnokov, Stanislav A. Tchesnokov

System for mathematical modeling of glazing functioning during operation is considered in the paper. This system takes into account operational loads, climatic effects and influence of building structures. It is destined for calculation of glazing performance and generating of glazing variant which meets prescribed requirements.

Large number of effects acts together on glazing of building or installation during their operation, especially in regions with inclement climate. These factors must be considered during projection of glazing. There are snow and wind loads, possible impacts of mans or objects, low and high temperatures, oscillations of temperature and humidity, chemical substances, variations of atmospheric
pressure, solar radiation. Effect of these factors results in fluctuation of glazing performance in comparison with normal conditions. Moreover, fluctuations of glazing characteristics influence on each over. For example, high atmospheric pressure or wind load can cause sag of glass and this sag leads to heat transfer resistance lowering. As a consequence, sag can increase more because of lowering of temperature in inner gas space. Therefore it is necessary to discover glazing characteristics in all range of actions. Strength and security properties must be determined under the most unfavorable combination of extreme action values.

Developed mathematical models of glazing and software system on their basis allow solving such problems. This system is successfully used in the Glass Research Institute.

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