Fuzzy Comprehensive Evaluation Method of Masonry Structure Safety Based on Grey Clustering Theory

Table 8

Evaluation criteria of clustering indexes after dimensional normalization.

Safety grade	Bearing capacity	Deformation		Structure	Cracks		Subgrade stability
		Subgrade^①	Other clustering targets^②		Foundation	Other clustering targets^②
	≥1.0	≤0.125	≤0.111	≥1.0	≤0.4	≤0.111	≥1.0
	≥0.95	0.25	0.333	0.75	0.600	0.333	0.75
	≥0.90	0.625	0.667	0.50	0.800	0.667	0.50
	<0.85	>1.0	<1.0	<0.25	>1.0	>1.0	<0.25

Note. ^①Where the subgrade deformation refers to uneven settlement; ^②the other clustering targets here refer to the foundation, wall and column, beam, floor slab, and parapet.