大跨径桥梁的动态监控模型研究

考虑到大跨径桥梁的安全监控模型应结合其动态特性而建立，探讨了把风速、温度、车流量等外界影响因素作为大桥变形的状态参数，采用自适应卡尔曼滤波，建立大跨径桥梁的动态监控模型，并对大桥变形速率分量进行分析．通过对南京长江第二大桥的分析，表明动态监控模型具有较好的效果和应用价值．

Dynamic monitoring model for long-span bridges

In consideration of the dynamic characteristics of long-span bridges, a dynamic monitoring model is developed for long-span bridges by use of the self-adaptive Kalman filtering, with some affecting factors, such as the wind velocity, temperature, and vehicle flow, taken as the state parameters of bridge deformation, and the velocity component of bridge deformation is analyzed. The application of the model to the analysis of the Second Nanjing Yangtze River Bridge shows that the dynamic monitoring model is of good effectiveness and high value of application.