Abstract:

Objective: To realize the on-site identification of wood species in wooden ancient buildings, the micro-destructive curves of common wood species of wooden components were quantitatively studied, and the relevant comparison method based on micro-destructive curves was also discussed. Method: In this paper, the commonly used wood species, larch, Chinese fir, pine and poplar in wooden components of ancient buildings were taken as the research objects. The resistograph test curves of the related wood species were obtained by using resistograph detector. The identification method and idea of wood species information of wooden components in ancient buildings based on micro-destructive testing were proposed through quantitative research on mean value, ratio, trend of micro-destructive curves of relevant wood species. Result: The results indicated that the commonly used wood species, larch, Chinese fir, pine and poplar in wooden components of ancient buildings can be preliminarily identified through similarity comparison between on-site testing curves and multiple wood micro-destructive curves database. The next step research should be focused on improving the micro-destructive parameter design, basic database expansion and comparison method. The identification of wood species was carried out by the comparison the micro-destructive curves. When the density of wood species varies greatly, the identification can be obtained directly from the height of the curves. When the density of wood species is similar, but the peak and valley of curves have large differences, the identification can be obtained through curves ratio and curves trend. Furthermore, when the density of wood species and the curves ratio are similar, the identification should be confirmed through historical information of ancient buildings, wood sampling information and other features of the curves. At last, the identification accuracy in actual application can be improved by combining the traditional identification results and by adding the micro-destructive curves of wooden components to database. Conclusion: The wood species of on-site identification technology of wooden components in ancient buildings is a proper protection identification technology based on the characteristics of historical and cultural relics. The technology can be used to identify wood species by similarity comparison of wood micro-destructive curves under certain rules and constraints, which can be used as an effective complemental way to the traditional identification method.

Key words: ancient building, wooden components, wood species, micro-destructive testing, wood identification