大型振动台阵的振动影响实测研究大型振动台阵的振动影响实测研究.pdf

Hans Journal of Civil Engineering 土木工程, 2014, 3, 196-206 Published Online November 2014 in Hans. /journal/hjce /10.12677/hjce.2014.36024 Site Test on Vibration Influence Induced by Large Scale Shaking Table Array Xun He, Guangzhen Li, Xiaosong Ren, Gang Zong Research Institute of Structural Engineering and Disaster Reduction in College of Civil Engineering, Tongji University, Shanghai Email: hexun215@126.com th th th Received: Oct. 4 , 2014; revised: Nov. 5 , 2014; accepted: Nov. 14 , 2014 Copyright © 2014 by authors and Hans Publishers Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). /licenses/by/4.0/ Abstract In order to evaluate the effect of vibration induced by large scale shaking table array, site test on the ground vibration acceleration was done inside and outside the civil lab. Two conditions, as no table working and 2 tables working with sines input of different frequencies from 1 to 40 Hz and peak acceleration of 0.5 g are included. By vibration attenuation curve from the test result, the damping ratio of different frequency is got and the effectiveness of the large mass stiffness is also verified for vibration reduction. Keywords Shaking Table Array, Ground Borne Vibration Test, Attenuation Rate of Ground Vibration, Damping Ratio 大型振动台阵的振动影响实测研究 何 汛，李广振，任晓崧，宗 刚 同济大学，土木工程学院结构工程与防灾研究所，上海 Email: hexun215@126.com 收稿日期：2014年10月4 日；修回日期：2014年11月5 日；录用日期：2014年11月14 日 196 大型振动台阵的振动影响实测研究 摘 要 为研究某大型土木实验室内四点振动台阵正常运行所致的振动影响，对实验室内部和外部进行表面加速 度的实地测试。测试内容主要分为两个时段，一是设备静止时段，二是设备运行时段，两个振动台满布 刚性质量，最大加载质量接近60 T，施加1~40