中文摘要：

为了研究危桥车辆振动对邻近景观石窟的影响,以宜昌市三游洞摩崖石窟为工程依托,设置了石窟主体区动态信号采集系统,采用重型车辆作为振动源,现场测试跳车、急刹车和自然极限车辆状况时石窟穹顶、题刻岩石处、危桥桥台以及振动源路面处的振动波速和频率,分析石窟在各种车辆振动源作用下的振动波速及传播规律,并与理论计算结果对比分析。结果表明：车辆在危桥运行时,振动源到石窟穹顶的振动波速在50m范围内呈非线性衰减趋势;桥面跳车引起的石窟振动效应大于急刹车和自然极限车流状况;30km/h时急刹车、跳车以及自然极限车辆状况下,三游洞石窟穹顶最大竖向振动速度为分别为0.088、0.115和0.100mm/s,但振动速度均小于规范值;古石窟特征振动频率为49.805Hz。实测值与理论值吻合较好,现场实测数据有效、可信。

英文摘要：

In order to evaluate the vibration response of grottoes named Three Travelers Cave under heavy traffic loading, the dy-namic signal acquisition system was installed in grottoes. The heavy loading vehicle was industrial vibration source. The vibration velocity of grottoes was tested under different vehicle condition, such as jump car, emergency brake and natural limit condition The vibration velocity and propagation law of the grottoes ancient architecture was analyzed. The test results were verified and compared with the theoretical calculation results. The test results showed that the vibration wave velocity have prominent nonlin-ear attenuation trend from the vibration velocity vibration source to the dome of the grottoes in the range of 50 m. The vibration effect of the bump is greater than the limited vehicle braking and natural condition Under 30 km/h jump car, braking, and a nat-ural vehicle conditions？ maximum vertical vibration velocity of grottoes were 0. 115, 0. 111 and 0. 100 mm/s, respectively, all of which was less than the standard value of the grotto. The characteristic vibration frequency of the grotto is 49. 805 Hz. The measured value matched well with the theoretical value, which proved that the measured value was reliable.