桥梁健康监测系统在线结构分析及状态评估方法

Online Structural Analysis and State Evaluation Method for Bridge Health Monitoring System

为实时在线评估桥梁结构实测荷载与响应状态的相关性,提出桥梁健康监测系统的在线结构分析及状态评估方法。编制有限元分析程序内核,在程序内核中内嵌桥梁结构有限元模型,通过授权的数据库接口,读取健康监测系统中的实时荷载数据,对荷载数据进行统计分析,然后计算结构的理论响应值,并与健康监测系统中的结构实测响应值进行对比,对结构行为进行评估。某桥主桥为主跨460m的五跨连续双塔双索面半飘浮体系斜拉桥,应用该方法对该桥进行在线分析和状态评估,评估结果显示,根据实测荷载分析得到的结构响应和实测结构响应吻合较好,结构荷载和响应具有线性相关性,结构运营正常。

To evaluate the relevance between the measured loads and response state of bridge structure in real time online, an online structural analysis and state evaluation method for bridge health monitoring system was put forward. In the method, the kernel of the finite element analy sis program was complied, the finite element models of bridge structure were built in the kernel and by way of the authorized interface to the database of the bridge health monitoring system, the realtime load data in the health monitoring system were read and statistically analyzed. The the oretic response values of the structure were then computed, the computed values were compared to the measured response values of the structure in the health monitoring system and finally the behavior of the structure was evaluated. On the main bridge of a bridge, the 5span semifloating system continuous cablestayed bridge with double pylons, double cable planes and with a main span 460 m, the method was used to implement the online structural analysis and state evaluation and the results of the evaluation demonstrated that the response of the structure acquired from a nalysis of the measured loads were coincident with the measured response, the loads and response of the structure had linear relation and the operation of the structure was normal.