Through a series of experiments of dynamic deformation and destruction under time series loading on an indoor real model bridge, Ground-based real-aperture radar interferometry (GB-InRAR) discovered that before the structure of the bridge was damaged, its amplitude and acceleration increased with the increase of load; After its structure was damaged or cracked, such dynamic characteristics as natural frequency, damping ratio, stiffness and bearing capacity decreased obviously. Moreover, GB-InRAR dynamic load monitoring of Xiangtan Railway Bridge and Inter-city Railway Bridge. In the process of vehicle dynamic load, such important parameters as bridge deflection, natural frequency and damping ratio conform to the bridge loading procedures and dynamic characteristics. The results show that the GB-InRAR can accurately measure the deflection changes, natural vibration frequency and spectrum characteristics of bridges, and it can be used as effective means of the dynamic characteristics analysis in the safety detection and health evaluation of bridges.

地基实孔径雷达干涉仪（GB-InRAR）通过对室内真实模型桥梁在时间序列加载下的一系列动态变形和破坏实验发现，在桥梁结构受损之前，其振幅和加速度增加随着负荷的增加；其结构损坏或开裂后，其固有频率、阻尼比、刚度和承载力等动力特性明显下降。此外，湘潭铁路桥和城际铁路桥的GB-InRAR动态荷载监测。在车辆动载过程中，桥梁挠度、固有频率和阻尼比等重要参数符合桥梁加载程序和动力特性。结果表明，GB-InRAR可以准确测量挠度变化，