Dynamic finite element model updating of prestressed concrete continuous box-girder bridge

动态有限元素模型(女性) 一座对的具体连续盒子系结桥，把 Tongyang 称为运河桥牌，用一个真实代码的加速的基因算法(RAGA ) 基于周围的颤动测试的结果(AVT ) 被造并且更新。客观功能基于自然频率和形式的保证标准(MAC ) 度量标准被定义评估更新女性。二个客观函数被定义充分说明在 AVT 结果和更新的女性的预言之间的自然频率和 MAC 的相对错误和标准差。动态地更新了桥罐头女性更好代表它的结构的动力学并且在长期的健康在桥的服务生活上监视，条件评价和损坏鉴定用作一条基线。

The dynamic finite element model （FEM） of a prestressed concrete continuous box-girder bridge, called the Tongyang Canal Bridge, is built and updated based on the results of ambient vibration testing （AVT） using a real-coded accelerating genetic algorithm （RAGA）. The objective functions are defined based on natural frequency and modal assurance criterion （MAC） metrics to evaluate the updated FEM. Two objective functions are defined to fully account for the relative errors and standard deviations of the natural frequencies and MAC between the AVT results and the updated FEM predictions. The dynamically updated FEM of the bridge can better represent its structural dynamics and serve as a baseline in long-term health monitoring, condition assessment and damage identification over the service life of the bridge .