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With the developed countries, the transfer of the manufacturing base and the rapid development of China's manufacturing industry, the increasing scale of the construction of light steel plant. Especially in the eastern coastal areas, light steel plant due to its light weight, steel Province, low cost across a larger span, manufacture and installation of simple, short construction period, almost completely replaced the other structures in the form of the plant. In recent years, the climate extremes in most parts of the world more and more frequently occurred, caused by various disasters, to the socio-economic, ecological environment and even human health many adverse effects. To buildings caused by one of the most adversely affected by the snowstorm more repeated occurrence, been seriously interfere with the normal life of the masses, causing huge losses to the agricultural and industrial production, severely restricted the national social and economic development. In view of the above climate change, particularly in the frequency of heavy snow, heavy snow increased significantly, so give more sensitive to light snow load of portal frame structure endanger the safety of the structure, and some have led to a serious collapse incidents , resulting in significant economic losses. This paper proposed a new solution to change the past to increase the amount of material to enhance the overall strength of the method, the use of reasonable uninstall mechanism to achieve the purpose of relieved overweight loads. Light of portal frame structure that minimizes disruption in blizzard conditions, use of the repair as soon as possible, as much as possible to reduce the economic losses. The light damage snowstorms portal frame plant, for example, already Lingo software to calculate the reliability of the the light portal frame structure, analyze the cause of the collapse of the light portal frame. Using the finite element software abaqus simulation of the bearing capacity of the light portal frame plant, taking into account the specification snow load with the investigation of the actual load situation, summed up the structure of the internal forces variation with the destruction of the reasons. And installed in the the light portal frame structure snow load overload protection device simulation analysis using finite element software abaqus snow load overload protection device light portal frame structure, in order to evaluate the snow load overload protection device reliability. and the matlab software snow load overload protection device reliability, to ensure the reliability of the structure and snow load overload protection device reliability. The use of the snow load overload protection device greatest degree of control against the extent of the damage, significant economic benefits, reference and guiding significance for the engineering practice.
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