Abstract
A comprehensive method for quantitatively appraising the safety rating of masonry structure is proposed which is able to reflect the difference in the same safety level. The analytic hierarchy process (AHP), fuzzy theory, and the grey clustering theory were applied based on the fuzzy-grey characteristics and the structural safety factors of the building system. A four-layer safety evaluation model of masonry structure considering its structural features was established by using AHP method and a three-level fuzzy comprehensive evaluation model was elaborated. Then, the weight coefficient vector of each layer was calculated according to the expert experience and existing research results. Based on the grey clustering method and the fuzzy evaluation model, the evaluation matrix of every layer was established. Finally, this method was applied to a practical masonry structure. Not only the result was in agreement with the appraisal result according to Chinese standard method, but also it quantitatively evaluates the safety grade of every factor in every layer.
Highlights
Despite the huge technological improvement, innovative materials, and building systems used all over the world, the masonry structure still represent one of the most widely used building systems worldwide
Based on papers of Lin et al [10] and Qiu [22], this paper proposed a modified method which applied grey clustering theory to process the field data obtained from any existing masonry building and combines analytic hierarchy process (AHP) to assess the masonry structural safety in a more objective and accurate way
The clustering coefficients calculated by the grey clustering method can reflect the membership degree of clustering targets to a certain security level
Summary
Despite the huge technological improvement, innovative materials, and building systems used all over the world, the masonry structure still represent one of the most widely used building systems worldwide. In Europe, masonry arches and barrel vaults are quite used for centuries in different kinds of constructions, such as monuments and in common residential buildings and bridges [1]. In 2016, a method based on fuzzy analytic hierarchy process was put forward by Lin et al [10] This method is able to quantitatively evaluate the safety level ranging from the basic factor to the whole structure. Based on papers of Lin et al [10] and Qiu [22], this paper proposed a modified method which applied grey clustering theory to process the field data obtained from any existing masonry building and combines AHP to assess the masonry structural safety in a more objective and accurate way
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