外白渡桥工作状态模拟与使用安全评估

3D Finite Element Model and Service Safety Assessment of Waibaidu Bridge

在对桥梁档案进行详细调查基础上,初步建立了外白渡桥工作模型,进而与1991年、2000年的实测结果进行对比来校正工作模型,最终建立了反映实际受力性能的三维力学模型。在实桥工作状态模拟的基础上,联合应用传统疲劳分析和工程断裂力学计算该桥剩余寿命,并给出确保外白渡桥使用安全的检测间隔和维修策略。

A 3-dimensional finite element model which can reflect the actual mechanic performance is established on the basis of the existing bridge archives and through the calibration with the in-situ measured values of 1991 and 2000. Then a combined approach with the conventional fatigue analysis and the fracture mechanics based concept is presented in this paper. With this method the remaining fatigue life and service safety of Waibaidu Bridge were calculated. According to the calculation results the inspection interval and maintenance management strategy were suggested.