Characteristics of Ground Vibration Caused by Blasting Demolition Collapse of Zhuanyang Viaduct
Based on the measured results, ground vibration acceleration characteristics caused by blasting demolition collapse of the viaduct is analyzed, the conclusions are as follows: the peak of ground vibration acceleration decreased with increment of distance; the acceleration peak of vertical component is greater than the horizontal component, but the differences become smaller in the far field; the peak frequency of the ground vibration acceleration measured by line 1 is in exponential attenuation with the increasing of the distance, but the law is not found in measuring line 2 and line 3; the peak frequency of tangential component ground vibration acceleration is highest in line 1, there in turn from high to low are line 2 and line 3; the duration of ground vibration acceleration is increases with the distance, and the horizontal component is longer than the vertical component; vibration reduction measures reduce the peak value of ground vibration acceleration at the same time also can reduce the peak frequency and extend the duration of ground vibration acceleration; vibration superposition effect of continuous multiple bridge spans collapse increase the peak value of ground vibration acceleration and reduce the peak frequency, that is adverse to the building security.
1. Key Laboratory of Earthquake Engineering and Engineering Vibration，Institute of Engineering Mechanics, CEA, Harbin 150080 China;
2. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090 China
Abstract：Based on the measured results, ground vibration acceleration characteristics caused by blasting demolition collapse of the viaduct is analyzed, the conclusions are as follows: the peak of ground vibration acceleration decreased with increment of distance; the acceleration peak of vertical component is greater than the horizontal component, but the differences become smaller in the far field; the peak frequency of the ground vibration acceleration measured by line 1 is in exponential attenuation with the increasing of the distance, but the law is not found in measuring line 2 and line 3; the peak frequency of tangential component ground vibration acceleration is highest in line 1, there in turn from high to low are line 2 and line 3; the duration of ground vibration acceleration is increases with the distance, and the horizontal component is longer than the vertical component; vibration reduction measures reduce the peak value of ground vibration acceleration at the same time also can reduce the peak frequency and extend the duration of ground vibration acceleration; vibration superposition effect of continuous multiple bridge spans collapse increase the peak value of ground vibration acceleration and reduce the peak frequency, that is adverse to the building security.
收稿日期: 2013-12-05
出版日期: 2015-03-15
引用本文:
杨永强1，胡进军1，谢礼立1, 2，戴君武1，吴兴和1. 沌阳高架桥爆破拆除塌落引起的地面振动特征[J]. 振动与冲击, 2015, 34(5): 110-114.
Yang Yongqiang1, Hu Jinjun1, Xie Lili1, 2, Dai Junwu1, Wu Xinghe1. Characteristics of Ground Vibration Caused by Blasting Demolition Collapse of Zhuanyang Viaduct. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(5): 110-114.
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