Development and Application of Ancient Timber Buildings Structural Condition Assessment Model Based on a Fuzzy Matter-Element Model that Includes Asymmetric Proximity

Table 2

Structural condition evaluation index system for ancient timber buildings.

Target	Criteria	Index	Index evaluation
Structure condition of ancient timber buildings	Soil and foundation	Bearing capacity of foundation soil
		Subbase deformation
		Foundation damage
		Column and foundation connection
Structure condition of ancient timber buildings	Superstructure	Bearing capacity of member
		Connection construction
		Member deformation
		Crack slope
		Crack depth
		Decayed/insect-attacked

Note: is the average compressive stress value of the foundation bed, is the characteristic value of the foundation soil bearing capacity. is the maximum differential settlement of plinths (mm), is the center distance between adjacent plinths (mm). V is the total volume of the damaged (corrosive, puffing, loose, spalling) area of foundation, is the total volume of the foundation before damage, is the actual bearing area between the bottom of the column base and foundation, is the original sectional area of the column at the bottom; R is the resistance of structural members, is the important structural coefficient, is the effect of actions. is the condition of the node construction, when the mode of the node and connection is correct, and there is no deficiency, takes 0~0.10; when the mode of the node and connection is correct, there is only local deficiency on the surface, takes 0.10~0.15; when the mode of the node and connection is improper, there is obvious deficiency in the construction, and has resulted in slight looseness and deformation of the connection, takes 0.15~0.20; when there is obvious looseness, deformation, slippage, and crack at the surface of shear, > 0.25. is the lateral bending arch rise of the column, or the maximum deflection of the main beam, truss, or roof truss; is the unbraced length of the column, or the calculated span (mm) of the truss, roof truss, or main beam. is the sine value of the angle between the cracks and the timber parallel to the grain; is the depth of the crack, is the section area of the members along the crack depth direction; is the total area of decay, aging deterioration, and insect-attack, is the overall section area of the members.