Study On Thermal Stress Of Energy-Saving Glass Curtain Wall

The newly developed glass-curtain wall is very different from the old one in its temperature fields and thermal stresses distribution. The evenly distributed temperature fields of common glass curtain walls greatly simplifies the calculation of thermal stress, while the temperature gradient of energy-saving glass curtain walls makes the solution procedure much more complicated. Much more researches have been done about the temperature fields of the energy-saving glass curtain wall than its thermal stresses distribution. So it is significant for both theory and engineering practice to study on the latter aspect.This dissertation, supported by the KGE Foundation (No.200803 ), is concerned with the temperature field as well as thermal stresses of insulating glasses and laminated glasses. The main research and achievements of this thesis are as follows.This paper analyzed the thermal field of insulating and laminated glass plates with CFX. The paper provided theory temperature solutions by solving second order partial differential equations and classifying boundary conditions into Z-Boundary and X-Y-Boundary. Numerical temperature solution equations can be achieved by Finite Difference Method. The FEA solutions show well consistency with theory results, which justified the practicability of theory results.Experiments were designed to study on the distribution of thermal stresses. The experiment data showed the temperature difference between insulating glasses and laminated glasses. It is also concluded from the experiments the influence of glass plate thickness and insulating layer on the distribution of temperature field and thermal stress. The birth & death element and the ideal-gas equation were used to simulate the press in insulating layer and the temperature correction coefficient were specified by experiments and used to make the FEA methods more comprehensive application. The equivalent thermal expansion coefficient of laminated glasses and the pressure of insulating glasses were calculated according to the FEA methods.