Principles for Assessing Fracture and Lodging Risks in Ancient Trees and Protective Design
Strength defects and wind and snow load are the two major factors leading to fracture and lodging of ancient trees.Risk as-sessment for ancient trees is to find out safety risks,spot the location and size of defects,analyze the damage mode suffered by ancient trees and measure the residual strength and stability through observation,detection,diagnosis in the roots and mapping.Safety protec-tion for ancient trees is to design and install necessary supporting structures and backstay cable structures to prevent such damages.In this paper,an elaboration was made on the principles and methods for assessing risk in ancient trees with an introduction to the design and application of different types of supporting and backstay cable structures.
Ancient treesFracture and lodgingRisk assessmentSupporting deviceBackstay cable
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