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Finite Element Analysis of Tempreture and Stress Field of External Wall Insulation Bolt

Author: FengHuiHui
Tutor: ChenSiLiï¼›AnYueJun
School: Shenyang University of Technology
Course: Solid Mechanics
Keywords: Exterior insulation Insulation Anchor Temperature field Stress field Finite Element Method
CLC: TU761.12
Type: Master's thesis
Year: 2010
Downloads: 88
Quote: 1
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Abstract


In recent years, for the consideration of building energy-saving insulation , domestic housing use of exterior insulation system has many advantages . However, throughout the process promote the use of a variety of exterior insulation and finish systems technologies and products in the building wall more or less the phenomenon of hollowing, deflection , crack and fall off , a direct impact on building energy conservation effect. In order to ensure the safety and reliability of the exterior insulation and finish systems , on the basis of the bond fixed by mechanical anchor reinforcement is necessary . However , Anchor External Insulation System also has negative effects : Anchor thermal bridges ; the Anchor disk surrounding easier Konggu . Therefore, the thermal bridge effect of expansion bolts , the temperature difference between the role of the new expansion bolt strength , exterior insulation board anchored hollowing, cracking and external wall insulation systems expand comprehensive finite element analysis of new expansion application and improvement of the promotion of the bolt and the exterior insulation technology has important significance . In this paper, the finite element method, analyze the the temperature loads expansion bolts , hollow bricks , mortar and insulation board temperature distribution , and thermal - structural coupling analysis , the displacement field, the strain and stress field . Also, the calculation results with the corresponding theoretical knowledge test, the results show that the practical problems using the finite element calculation works . The main work of this paper are: expansion bolt anchor and expansion bolts anchoring system is not appropriate simplifications and assumptions based on temperature distribution law in contrast to the heat transfer increase the value of the single anchor system ; calculated and depicted a single anchor on the relationship between the density of heat and the added value of Anchor , Anchor diameter curve , the best distribution of density and anchor bolt diameter range of engineering applications ; outdoor warming and cooling at two temperatures loads displacement , strain and stress , to draw thermal stress within the scope of the conclusions in its strength allows expansion bolts ; the insulation board hollowing , cracking , exterior insulation system layers properties layer-by-layer gradient and to improve mortar flexibility suggestions for improvement ; and recommended anchor anchoring depth , the thickness of the insulation board and other parameters should be cool to outdoor conditions as a basis to design .

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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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