| Ground surface response induced by shallow buried explosions |
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| 作者姓名： | Wang Derong Wang Mingyang Li Jie and Feng Shufang |
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| 基金项目： | Science Fund for Creative Research Group of the National Natural Science Foundation of China under Grant No.51021001;China Postdoctoral Science Foundation under Grant No.2013M541675;National Natural Science Foundation of China under Grant No.51309233 |
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| 摘 要： | Based on the spherical cavity expansion theory in the elastic half space,the ground surface movement characteristics of shallowly buried explosions are analyzed.The results show that the induced seismic wave is a longitudinal wave in the near zone and a Rayleigh wave in the far zone.The maximum displacement(velocity) of the longitudinal wave and the Rayleigh wave are inversely proportional to the scaled distance,and can be described by exponential function with exponents equal to 1.4 and 0.5,respectively.The vibration frequencies of the waves have almost no change.The vibration frequency of the longitudinal wave approximates the natural vibration frequency of the cavity in the broken area,and the vibration frequency of the Rayleigh wave is about half that of the longitudinal wave.On the same reduced buried depth and reduced distance,the particle displacement is directly proportional to the product of the boundary loading and cavity radius,and is inversely proportional to the transversal wave velocity.Meanwhile,the particle velocity is directly proportional to the boundary loading and inversely proportional to the wave velocity ratio.In the far zone,the buried depth of the explosive only has a slight effect on the longitudinal wave,but has a larger effect on the Rayleigh wave.
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| 关 键 词： | shallowly buried explosions ground surface response theoretical analysis similarity relation effect of buried depth |
Ground surface response induced by shallow buried explosions |
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| Wang Derong,Wang Mingyang,Li Jie and Feng Shufang.Ground surface response induced by shallow buried explosions[J].Earthquake Engineering and Engineering Vibration,2014,13(1):163-169. |
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| Authors: | Derong Wang Mingyang Wang Jie Li Shufang Feng |
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| Institution: | 1. State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact, PLA University of Science and Technology, Nanjing, 210007, China
2. Engineering Institute of Engineering Corps, PLA University of Science & Technology, Nanjing, 210007, China
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| Abstract: | Based on the spherical cavity expansion theory in the elastic half space, the ground surface movement characteristics of shallowly buried explosions are analyzed. The results show that the induced seismic wave is a longitudinal wave in the near zone and a Rayleigh wave in the far zone. The maximum displacement (velocity) of the longitudinal wave and the Rayleigh wave are inversely proportional to the scaled distance, and can be described by exponential function with exponents equal to 1.4 and 0.5, respectively. The vibration frequencies of the waves have almost no change. The vibration frequency of the longitudinal wave approximates the natural vibration frequency of the cavity in the broken area, and the vibration frequency of the Rayleigh wave is about half that of the longitudinal wave. On the same reduced buried depth and reduced distance, the particle displacement is directly proportional to the product of the boundary loading and cavity radius, and is inversely proportional to the transversal wave velocity. Meanwhile, the particle velocity is directly proportional to the boundary loading and inversely proportional to the wave velocity ratio. In the far zone, the buried depth of the explosive only has a slight effect on the longitudinal wave, but has a larger effect on the Rayleigh wave. |
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| Keywords: | shallowly buried explosions ground surface response theoretical analysis similarity relation effect of buried depth |
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