考虑振动装置影响的斜拉桥拉索索力评估方法研究

针对斜拉桥在运营过程中的实际索力标定问题,本文在原有的频谱法测试索力原理的基础上,通过考虑拉索减振器的位置,引入修正的等效索长,建立考虑减振器位置的斜拉桥索力测试方法。该方法既能满足索力测试过程中通过采集拉索振动基频便捷性,同时又能考虑拉索减振器布置带来的偏差影响,因此具有很好的理论意义和工程使用价值。最后,通过三水大桥的斜拉索实际索力测试,说明本文提出方法的适用性和工程实用价值。

Study on Cable Force Evaluation Method of Cable-stayed Bridge Considering Influence of Vibration Device

In view of the actual cable force calibration problem of cable-stayed bridges in operation, the modified equivalent cable length is introduced and the cable force testing method of cable-stayed bridge considering the position of the damper is established on the basis of the cable force principle tested by the original frequency spectrum method. This method can not only meet the convenience of collecting the cable vibration fundamental frequency during the cable force testing, but also consider the deviation effect caused by the arrangement of cable vibration dampers. Therefore, this method has the good theoretical significance and engineering value in use. Finally, through the actual cable force test of Sanshui Bridge, the mentioned method has the good applicability in the projects.