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Studies on the Heat Insulation Performance and the Improvement of Construction Technologies of the Roof Open-web Sandwich Structure

Author: LiZhengZuo
Tutor: XiaoNan
School: Zhejiang University
Course: Structural Engineering
Keywords: Building energy Fasting sandwich structure Insulation Thermal Thermal Resistance Construction Technology Shear key Convection Boundary layer
CLC: TU761.12
Type: Master's thesis
Year: 2008
Downloads: 68
Quote: 3
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Abstract


This paper is to study the fasting sandwich insulation properties and construction process improvement . Unlike conventional roof insulation of the \in one. Therefore, this research project was initiated by the wake of the current national building energy theme, has practical significance . Flat wall thermal resistance calculated according to a complex theory, through appropriate simplification , general fasting sandwich structure deduced the basic unit of equivalent thermal resistance calculated for different sizes of fasting after calculating the thermal resistance of the sandwich structure provides a convenient . Combined with practical examples , the use of equivalent thermal resistance calculated specific project which fasting sandwich structure thermal resistance compared with solid board concluded that the decrease of the amount of the total thermal resistance of concrete has greatly improved , elaborated fasting sandwich structure in large span roof structure in which advantages. Fasting sandwich structure introduced traditional construction methods of operation, and pointed out its shortcomings. According fasting sandwich structure under load internal force distribution is proposed assembly used in the steel shear key construction feasibility . Elaborated fasting sandwich structure improved construction process , precautions and work characteristics of the method . Assembled using steel shear key , to overcome the past fasting reinforced concrete shear key structures of short formwork and steel banding difficulties , improve construction speed. The pipe hole on the shear key , after assembly , this time to consider the convective heat transfer problems . By analyzing the convective heat transfer coefficient shows that purports to convective heat transfer coefficient increases , you can try to increase the air flow rate. Through the corresponding ANSYS model analysis, the shear key hole is beneficial in a certain range increases air velocity and air layer thickness on an empty stomach between the thermal performance of the sandwich structure is beneficial .

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CLC: > Industrial Technology > Building Science > Construction > The project and the type of work > Technology of special construction works > Protection works > Insulation, insulation works
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