基于健康监测系统的非对称外倾蝴蝶拱桥健康状态评估方法研究

摘要

Based on statistical comparison diagnostic method for static identif ication,the bridge dead load state was assessed by using the data from a asymmetrical camber Butterfly arch bridge health monitoring system of Chengdu. Based on the direct evaluation method of monitoring data, the dynamic characteristics of bridge live load were evaluated.Based on the theories such as rain f low statistics and linear cumulative damage rule,the fatigue damages on the bridge suspender and tie bar were predicted and analyzed.Based on conventional statistical analysis method and grey relational analysis method, the sensor data loss, distortion, repetition and abnormal state were identif ied, the system operation was evaluated.Through evaluation and analysis,it is found that the bridge is in good operation.The effective evaluation of mechanical state of the bridge and the system itself at the initial stage of operation is realized.%通过分析成都市一座非对称外倾蝴蝶拱桥健康监测系统得到的监测数据,基于静力识别的统计对比诊断法对桥梁恒载工作状态进行评估;基于监测数据的直接评定法对桥梁活载动力特性进行评价;基于雨流统计法、线性累计损伤准则等理论对桥梁吊杆、系杆进行疲劳损伤预测分析;基于常规统计分析方法和灰色关联度分析方法判识传感器数据缺失、失真、重复等异常状态,评估系统运行情况.通过评估分析发现该桥运营状态良好,实现了对该桥运营初期力学状态及系统自身运行状态的有效评估.