The Study Of Ultimate Bearing Capacity Of Light Aluminum Alloy Mobile House With Initial Imperfections

Comparing with the traditional fixed house, the moving house can be assembled and dismantled repeatedly, its shows the characteristics of the most is to being assembled convenient rapidly, small after dismantling, convenience to transports and stores, used repeatedly, having low request to the field and simple base setting, therefore in such as life, military fields the structures has extensive applications. The moving house studied in this paper, is developed by constructional engineering research institute of the Liberation Army's logistics department.It's the first time to bedeveloped in the nation and there are no special design computing methods and rules, relevant research is less too. Therefore the research on the moving aluminum alloy house takes on very important significance in theory and application.According to the material, manufacture, installment and the service condition of the light aluminum metal alloy mobile home, system and comprehensive discussing the influence of initial imperfections to the structural ultimate bearing capacity, then certain initial geometry imperfections is the structural main initial imperfections, as well as the way how to confirm the value of initial imperfections. Based on the basic principle of finite element method, established the analysis model of the framework structure and whole structure of light aluminum metal alloy mobile home, using consistent imperfect buckling analysis method, analysised the influence degree of initial geometric imperfection in the framework structure and whole structure under wind load condition and snow load. From the above, we can get that the influence of geometric imperfection to the structural ultimate bearing capacity is great, especially under the horizontal load, this influence can not be ignored in structure design.