Study on probability and statistics characteristics of excitation signal at rupture of perilous rock
1. College of Hydraulic & environmental engineering, China Three Gorges University, Yichang, Hubei, 443002, China
2. Institute of Geotechnical Engineering, Chongqing Jiaotong University, Chongqing, 400074, China
Abstract：The perilous rock aggregates with complex genetic relations are the basic conditions to trigger large and giant collapse disasters, the sudden destruction of any rock block in the aggregates will release energy which spread to the surrounding and produce excitation effect. The excitation signal is reasonable to be characterized by excitation acceleration. For the falling perilous rock, the probability statistical features are analyzed through the indoor model test. The results show that the energy released at rupture of perilous rock has point load characteristics and autocorrelation at a certain extent. The probability density of excitation signal showing a single peak approximates a normal distribution, as well as, the peak intensity in the horizontal is greater than that in the vertical. At the moment for perilous rock to rupture, the closer to excitation source, the average value, the valid value and the standard deviation of excitation signals are greater, especially the measuring value at the vertical direction is greater than that at the horizontal direction. the completeness of the interface between perilous rock blocks significantly affect excitation signal transmission, the peak of the statistical characteristics and the probability density of excitation signal is greater as the completeness gets better, and the transfer effect of the excitation signal is better as the attenuation time gets longer. The study has a positive meaning to make the model test of excitation effect at rupture of perilous rock under similar conditions.
陈洪凯1,2 杨 铭1 唐红梅2 王 智2 胡 丹1 张景昱1. 危岩破坏激振信号概率统计特征研究[J]. 振动与冲击, 2015, 34(8): 139-143.
CHEN Hong-kai1, 2, YANG Ming1, TANG Hong-mei2, Wang Zhi2, HU Dan1, ZHANG Jing-yu1. Study on probability and statistics characteristics of excitation signal at rupture of perilous rock. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(8): 139-143.
[1] 陈洪凯.三峡库区危岩链式规律的地貌学解译[J].重庆交通大学学报(自然科学版),2008,27(1):91-95.(CHEN Hong-kai. Geomorphology Research on Chained Regularity of Perilous Rock in the Area of the Three Gorges Reservoir [J]. Journal of Chongqing Jiaotong University (Natural science), 2008,27(1):91-95.)
[2] B. Palma, M. Parise, P. Reichenbach, and F. Guzzetti. Rockfall hazard assessment along a road in the Sorrento Peninsula, Campania, southern Italy [J]. Nat Hazards, 2012, 61:187-201
[3] Claudia Mignelli, Stefano Lo Russo, and Daniele Peila. Rockfall risk management assessment: the RO.MA.approach [J]. Nat Hazards, 2012, 62:1109-1123
[4] 许强,黄润秋,殷跃平,候圣山,董秀军,范宣梅,汤明高.2009年6.5重庆武隆鸡尾山崩滑灾害基本特征与成因机理初步研究[J].工程地质学报,2009,17(4):433-444.( XU Qiang, HUANG Runqiu, YIN Yueping,et al. The JIWEISHAN landslide of June 5, 2009 in Wulong Chongqing:Characteristics and Failure Mechanism [J]. Journal of Engineering Geology2009,17(4):433-444.)
[5] 张永兴,卢黎,张四平,胡岱文.差异风化型危岩形成和破坏机理[J].土木建筑与环境工程,2010,32(2):1-6. (ZHANG Yong-xing,LU Li,ZHANG Si-ping, et al. Development and Failure Principle of Differential Weathering Overhanging Rock [J]. Journal of Chongqing Jianzhu University, 2010,32(2):1-6.)
[6] Frayssines, M. and Hantz, D. Modelling and back-analysing failures in steep limestone cliffs. International Journal of Rock Mechanics and Mining Sciences, 2009, 46(7):1115-1123.
[7] 陈洪凯,唐红梅,王林峰,鲜学福.缓倾角岩质陡坡后退演化的力学机制[J].岩土工程学报,2010,32(3): 468-47.(CHEN Hong-kai, TANG Hong-mei, WANG Lin-feng, XIAN Xue-fu. Mechanical mechanism for retreat evolution of steep rock slopes with gentle dip [J]. Chinese Journal of Geotechnical Engineering, 2010,32(3): 468-473.)
[8] 唐红梅,王智,陈洪凯,鲜学福.坠落式危岩崩落的激振效应与求解[J].振动与冲击, 2012,31(20):32-37(TANG Hong-mei, WANG Zhi, CHEN Hong-kai, XIAN Xue-fu. Contribution ratio of excitation action triggered by collapse of perilous rock to stability of perilous rock [J], Journal of Vibration and Shock, 2012, 31(20):32-37)
[9] 唐红梅,陈洪凯,王智,何晓英,朱绣竹.危岩破坏激振效应试验研究[J].岩土工程学报,2013,35(11):2117-2122. (TANG Hong-mei, CHEN Hong-kai, WANG Zhi, HE Xiao-ying, ZHU Xiu-zhu. Experimental study on excitation effect for perilous rock [J], Chinese Journal of Geotechnical Engineering, 2013, 35(11):2117-2122.)
[10] 陈洪凯,张瑞刚,唐红梅,赵先涛.压剪型危岩破坏弹冲动力参数研究[J].振动与冲击,2012,31(24):33-36. (CHEN Hong-kai, ZHANG Rui-gang, TANG Hong-mei, ZHAO Xian-tao. Elastic & Impulsive Dynamic Parameters of a Ruptured Compression-shear Perilous Rock [J]. Journal of Vibration and Shock, 2012,31(24):33-36.)
