A Study On The Freeze Injury Of Wooden System Construction In Heritage Buildings

In ancient and recent times, wood is the main construction material in our country; until the 20 th century, due to the use of new materials and the emergence of new architectural forms, wood gradually regress becoming an auxiliary building materials. In the third survey on cultural relics of our country, the heritage buildings with wooden systems occupy a larger proportion. However, Over time, a large number of heritage building with wooden systems, affected by own property, geographic and climatic environment, and so on, their existing situation is not optimistic.China is one of the more obvious monsoon climate. As effects of its unique landscape environment and other factors, led to a wide range of geographical F rigid and the long and cold winter, through the review of the information obtained that twothirds of Frigid range up land area of our country. Based on the freezing injury formation of the external influence above, materials in heritage building wooden system(wood, metal, plaster etc.) and its interaction between material were analyzed, understand the impact of the cold climate environment on the building.In order to accurately find the mechanism of freeze injury to wooden system of heritage buildings. Paper adopted the field research method, investigating more than 1000 buildings,649 unit, in 17 Frigid region, numbered them, registered them and documented them. According to the different types of lists, induction, found that in the freezing environment in different or same parts showing a crack, efflorescence, heeling damage form. In order to accurately analyze the relationship between the morphology and distribution of the damage, the whole system is divided into bridgesystem, wooden wall system and non main structure system, respectively summarize the relationship between the type of form and architectural form, the site of injury, to find the law.Comprehensing data information above concluded that the formation of cold damage cultural relics timberwork system is an infinite loop and long process, but the damage form of timberwork system can be roughly grasp the damage development process.Through the comprehensive analysis of materials, environment a nd the construction of the cold wood system of heritage buildings that water plays an important role in the whole process of freezing injury. It plays the main role by frost in wood system failure, cracking and deformation of surface layer, to play a secon dary cause of wooden parts damage in the form of a solution, causing Timberwork System deformation, efflorescence and decay phenomenon, to play an indirect role, and comprehensive combination of the above effects and surface thaw, eventually led to the system of heritage buildings appeared in wooden side phenomenon.In summary, the article based on climate environment and material properties of Frigid region wooden structure system,And according to Data and information of survey, analysised between the shape and location of the damage rule, finding out mechanism of heritage buildings in Frigid region...