中文摘要：

论述了拱肋混凝土和钢管的脱空会导致钢管混凝土拱桥承载力降低，同时界面脱空的位置和程度是无法通过外观检查确定，因而存在很大的隐患．现役几百座钢管混凝土拱桥尚无有效界面脱空监测技术．通过以界面脱空处的钢管局部振动为对象，采用振动测试方法，以分布式加速度传感器列阵采集信号，对界面脱空进行定性识别．

英文摘要：

The interface separation of concrete-filled steel tube can decrease the bearing capacity of the arch bridge. Meanwhile, the location and the degree of the interface separation can not be found by visual inspection. Thus the potential risk is big. Recently, there is no effective method for the several hundreds existing arch bridge to find the interface separation. Based on the vibration testing principle, a method is introduced, which takes the local vibration of the interface separation area as the study object and gets the signals by accelerometer array to identify the interface separation.