基于事件树的混凝土桥梁全寿命检测维修策略  

OPTIMUM INSPECTION AND REPAIR STRATEGY FOR RC BRIDGE BASED ON EVENT TREE MODEL

作　　者：周祝兵 ZHOU Zhubing(Jiangsu Fasten Steel Cable Co.,Ltd.,Jiangsu Wuxi 214400,China;Harbin Institute of Technology,Harbin 150090,China)

机构地区：[1]江苏法尔胜缆索有限公司,江苏无锡214400 [2]哈尔滨工业大学,哈尔滨150090

出　　处：《低温建筑技术》2020年第2期114-117,133,共5页Low Temperature Architecture Technology

摘　　要：文中采用事件树模型以桥梁全寿命总成本最小为目标,采用可靠指标限值作为约束,建立钢筋混凝土桥梁全寿命最优决策方法。研究抗力退化、检测精度和失效造成的损失等对结构全寿命总成本的影响,进一步确定对检测与维修策略的影响。研究表明,随着检测次数的增加,桥梁全寿命周期总成本先减小并达到最优而后增加,可靠指标一直增大;抗力退化严重时需要更多的检测和维修确保总成本达到最优;检测精度和失效造成的损失影响总成本更显著。In this paper,the Event Tree model is used to minimize the total cost of the whole life of the bridge,and the limit value of reliability index is used as the constraint to establish the optimal decision-making method of the whole life of the reinforced concrete bridge.The influence of resistance degradation,detection accuracy and loss caused by failure on the total life cycle cost of the structure is studied,and the influence on detection and maintenance strategy is further determined.The resluts show that with the increase of the number of tests,the total cost of the whole life cycle of the bridge firstly decreases and reaches the optimum and then increases,and the reliability index keeps increasing.When the resistance degradation is serious,more tests and maintenance are needed to ensure that the total cost reaches the optimum.In addition,the total cost of the loss caused by the test accuracy and failure is more significant.

关 键 词：桥梁工程 全寿命成本 事件树模型 抗力衰减 检测维修策略 

分 类 号：TU746[建筑科学—建筑技术科学]