The invention belongs to the technical field of bridge structure damage identification, and particularly relates to a method for identifying bridge structure damage by using a test vehicle based on a synchronization theory, which comprises the following steps: step 1, two sensors are arranged between two shafts of the test vehicle, and the test vehicle can be various existing traffic vehicles or self-designed vehicles; step 2, the test vehicle passes through the to-be-tested bridge at a constant speed, and front and rear shaft acceleration response signals are synchronously collected until the test vehicle completely drives away from the bridge; 3, filtering the obtained signal to obtain an nth-order vibration mode component response signal; 4, clustering the acceleration signals of the front shaft and the rear shaft of the test vehicle by adopting a clustering method according to measuring point values required by a synchronization theory; 5, measuring point values obtained through clustering are calculated according to the synchronization theory, and a needed vibration mode is obtained; and 6, carrying out rigidity inversion on the obtained nth-order frequency and modal of the bridge by adopting an improved direct rigidity method so as to identify the section bending rigidity of each unit node.
本发明属于桥梁结构损伤识别技术领域,具体涉及一种利用测试车基于同步理论识别桥梁结构损伤的方法,包括以下步骤:步骤一、在一辆测试车两个轴中间上装两个传感器,该测试车可为现行的各类交通车辆或自行设计的车辆;步骤二、测试车匀速通过待测试桥梁,并同步采集前后轴加速度响应信号,直至测试车完全驶离桥梁;步骤三、对得到的信号滤波得到第n阶的振型分量响应信号;步骤四、通过将测试车前后轴加速度信号按照同步理论需要的测点值先采用聚类方法进行聚类;步骤五、将聚类得到的测点值按照同步理论进行计算得到所需要的振型模态;步骤六、对所得桥梁第n阶频率及模态,采用改进的直接刚度法进行刚度反演,以识别各单元节点的截面弯曲刚度。
Method for identifying bridge structure damage by using test vehicle based on synchronization theory
一种利用测试车基于同步理论识别桥梁结构损伤的方法
2023-06-23
Patent
Elektronische Ressource
Chinesisch
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