东南大学学报（自然科学版）2026，Vol.56Issue(4)：562-570,9.DOI:10.3969/j.issn.1001-0505.2026.04.009
斜拉桥状况评估拉索权重系数的能量法计算方法
Energy-based calculation method for cable weighting coefficients in cable-stayed bridge condition assessment
摘要
Abstract
To rationally assess the impacts of damages to individual stayed cable on the overall structural per-formance of cable-stayed bridges,an energy-based approach for determining cable weighting coefficients was proposed.Firstly,the weighting coefficient of the stayed cable was defined from the energy perspective as the weighted average of the total energy variation in the bridge system induced by cable damage.Subsequently,by analyzing the energy variations in the girder,cable,and pylon systems under cable rupture scenarios,the total system energy variation was obtained,and the changes in structural response before and after cable failure were quantified using finite element modeling,realizing the calculation of the weighting coefficients.Finally,a variable-weight synthesis method was introduced to incorporate these coefficients into the existing evaluation frameworks for cable-stayed bridges,thereby establishing a novel condition assessment methodology that ex-plicitly accounts for component-level weighting.The proposed method was applied in the evaluation of stayed cables of a certain cable-stayed bridge.The results show that this method can effectively quantify the contribu-tion of individual cable performance score and reflect the actual in-service condition of stayed cables.It ad-dresses the limitations of the stiffness matrix method and the strain energy-based sensitivity analysis method,both of which are often difficult to be applied to large and complex structures when determining component im-portance,thus providing a valuable theoretical reference for scientific maintenance and management of cable-stayed bridges.关键词
桥梁工程/状况评估/斜拉索评估/能量法/权重系数Key words
bridge engineering/condition assessment/evaluation of stayed cables/energy method/weight-ing coefficient分类
交通工程引用本文复制引用
贺志启,方瀛楷,王昆鹏,王连发..斜拉桥状况评估拉索权重系数的能量法计算方法[J].东南大学学报（自然科学版）,2026,56(4):562-570,9.基金项目
国家自然科学基金资助项目(52178116,52578181) （52178116,52578181）
江苏省自然科学基金资助项目(BK20220072) （BK20220072）
中交集团院士专项资助项目(YSZX-01-2023-01-A,YSZX-03-2024-04-A). （YSZX-01-2023-01-A,YSZX-03-2024-04-A）
