【摘要】 城市桥梁是城市交通网络的关键枢纽，预防性养护有助于延长桥梁使用寿命。基于此，系统梳理了城市桥梁预防性养护的理论体系及养护关键技术。以武汉市某5跨变截面连续箱梁桥为案例，采用规范法、层次分析法(AHP)进行风险评估，对上部结构、下部结构、桥面系的健康状况进行打分，根据评估结果给出养护方案。更多还原

【Abstract】 Urban bridges serve as critical hubs in the urban transportation network, and preventive maintenance contributes to extending their service life.Based on this, a systematic review has been conducted on the theoretical framework and key maintenance technologies for preventive maintenance of urban bridges.Taking a five-span continuous box girder bridge with variable cross-sections in Wuhan as a case study, both normative methods and the Analytic Hierarchy Process(AHP) were employed for risk assessment.The health conditions of the superstructure, substructure, and bridge deck system were scored, and maintenance plans were proposed based on the assessment results.更多还原