系杆拱桥的损伤识别与诊断研究

桥梁结构损伤识别是对既有桥梁结构进行损伤检测的重要一步.理论分析表明结构损伤前后的固有频率的变化包含了结构损伤信息.对兰州市某黄河公路大桥系杆拱结构进行了损伤数值模拟,提取其固有频率作为BP神经网络的输入参数来训练网络,对结构的损伤进行了模拟诊断分析,并在与实桥的损伤结果基础上提出了基于BP网络的系杆拱损伤诊断的方法.

Study of Damage Identification and Diagnosis of Tied Arch Bridge

Damage identification of bridge structure is an important step in structural damage detection. It is indicated in theory that the changes of natural frequencies before and after damage include some information about structural damage. In this paper, the damage of tied arch structure of some bridge in Lanzhou over Yellow River is simulated with numerical method and the natural frequencies are extracted to train BP network as the network input parameters and to diagnose the bridge damage. The damage diagnosis method in tied arch structure is presented in this paper according to the result of damage diagnosis.