TIME-VARYING RELIABILITY ANALYSIS AND LIFE PREDICTION BASED ON LONG-TERM BRIDGE HEALTH MONITORING DATA
Considering the reliability analysis of time-varying characteristics of bridge structures as a current research focus,the Fuhua River Bridge is taken as the research object,and a bridge reliability analysis method based on time-varying characteristics is proposed.The stress index of concrete materials of bridge structures is monitored by field measurement,its distribution law is studied,and time-varying mean value and time-varying standard deviation parameters are solved.The variation trend of strength reliability of the material is obtained,and the remaining life of the bridge is predicted by Monte Carlo method.The results show that the monitored stress of the bridge structure follows normal distribution,and the monitoring data can be well distributed near the reference line.With the increase of time,the reliability index of compressive strength decreases linearly,while the reliability index of tensile strength decreases first and then increases and tends to be stable.The predicted remaining life of Bridges ranges from 65 to 85 years,with an average remaining life of 75.5 years.
万方数据
维普
