In order to evaluate the damage state of bridge structure,the fuzzy membership function is intro-duced to construct the damage state evaluation model of bridge structure based on fuzzy theory.Based on a project example of a prestressed concrete beam bridge,various factors determined in the bridge structure are quantitatively represented in the form of normal distribution function,and then the membership degree corresponding to each factor is calculated respectively,and then combined into the overall membership de-gree of the structure the damage state is graded.The proposed method is consistent with the condition rat-ing obtained by the condition assessment method in the Maintenance Code for Highway Bridges and Cul-verts,and verifies the reliability of the damage state assessment method based on fuzzy membership func-tion.This method can partially alleviate the influence of subjective human factors on the assessment of structural damage in bridges and is applicable for analyzing the evaluation of structural damage state in bridges with similar characteristics.
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