介绍了重庆忠县长江大桥斜拉桥动力荷载试验方法和过程,并且对动载固有频率、控制截面影响线、动应变等参数实测值和计算值进行了对比。结果表明,控制截面测点实测基频跟计算值也比较吻合,实测影响线与计算值规律完全符合,结构动力性能良好,结果可为同类桥梁检测评定提供参考。
Zhongxian Yangtze River Bridge introduced suspension bridge dynamic load test methods and procedures,and the natural frequency of the dynamic load control section of influence lines,parameters measured and calculated values of dynamic strain were compared. The results show that the control section of the measuring point measured fundamental frequency is also more consistent with the calculated values,the measured and calculated values influence line in full compliance with the law,well-structured dynamic performance,the results can provide a reference for similar bridge inspection rating.