位移数据分析在实桥监测中的应用

Application of Displacement Data Analysis in Real Bridge Monitoring

针对国内某实桥A四个伸缩缝位移测点监测数据不一致的问题,采用多测点数据融合分析方法,研究实桥A两岸位移监测数据的差异性及关联性,结果发现主桥B2岸桥头伸缩缝位移监测值波动剧烈的异常征兆。桥梁结构专家质疑是否因桥梁结构约束体系发生改变引起,现场复核后确认是由桥梁辅助墩支座损坏引起的。由此可见,多测点位移监测数据融合分析方法能从区域化、整体化上发现结构异常,可更加准确、有效地判断桥梁运营状态。

In view of the inconsistency of the monitoring data of four expansion joint displacement measuring points of a real bridge A in China,the multi-point data fusion analysis method is used to study the difference and correlation between the displacement monitoring data of the two banks of the real bridge A.The result shows that the displacement monitoring value of the expansion joint of main bridge B2 shore bridge head,fluctuates abnormally.The bridge structure experts suspect that this is caused by the change of the bridge structure restraint system.After the on-site review,it is confirmed that it is caused by the bridge auxiliary pier bearing damage.It can be seen that the multi-point displacement monitoring data fusion analysis method can find structural anomalies from the perspective of regionalization and integration,and can judge the operation status of the bridge more accurately and effectively.