基于加卸载响应比理论的边坡动力稳定分析方法
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摘要
将加卸载响应比(LURR)理论引入边坡动力稳定分析研究中,建立边坡在地震作用下的加卸载响应模型,通过对边坡动力加卸载响应规律的研究,提出以代表边坡系统整体响应的加卸载响应度(LURD)代替边坡稳定分析传统方法中的安全系数,将边坡的变形分析和稳定性评价有机结合,探讨边坡动力稳定评价的新方法,并给出边坡在动荷载作用下的稳定性评价问题的解答。以马家岩水库右岸边坡为例,采用所提出的新方法进行计算,并与拟静力法、有限单元法和Newmark滑块法的计算结果进行对比,验证所提出方法的合理性及正确性,证明新方法可同时进行变形和稳定分析,较传统的动力分析方法精度更高。
The theory of load-unload response ratio(LURR)is introduced to analyze dynamic slope stability.The LURR model of slope is established by studying laws of load-unload response ratio of slope under seismic load;and a concept of load-unload response degree(LURD)is suggested to substitute the factor of safety.With this concept,a new method of dynamic slope stability is explored;and deformation analysis and stability evaluation are well combined.Taking the right bank of Majiayan reservoir for example,a dynamic analysis is performed using the suggested method.Compared the calculating results with pseudo-static method,finite element method and Newmark sliding block method,it is verified that the presented method is reasonable.The new method has priority to traditional dynamic analysis method in precision;and it can carry out deformation and stability analysis at the same time.
The theory of load-unload response ratio(LURR)is introduced to analyze dynamic slope stability.The LURR model of slope is established by studying laws of load-unload response ratio of slope under seismic load;and a concept of load-unload response degree(LURD)is suggested to substitute the factor of safety.With this concept,a new method of dynamic slope stability is explored;and deformation analysis and stability evaluation are well combined.Taking the right bank of Majiayan reservoir for example,a dynamic analysis is performed using the suggested method.Compared the calculating results with pseudo-static method,finite element method and Newmark sliding block method,it is verified that the presented method is reasonable.The new method has priority to traditional dynamic analysis method in precision;and it can carry out deformation and stability analysis at the same time.
引文
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[2]许强,黄润秋.用加卸载响应比理论探讨斜坡失稳前兆[J].中地质灾害与防治学报,1995,6(2):25-31.(XU Qiang,HUANG Runqiu.Studies on the precursor of slope instability applying to the load unload response ratio theory[J].The Chinese Journal of Geological Hazard and Control,1995,6(2):25-31.(in Chinese))
[3]贺可强,周敦云,王思敬.降雨型堆积层滑坡的加卸载响应比特征及其预测作用与意义[J].岩石力学与工程学报,2004,23(16):2665-2670.(HE Keqiang,ZHOU Dunyun,WANG Sijing.Features of load-unload response ratio and its significance in prediction of colluvial landslide induced by rainfall[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(16):2665-2670.(in Chinese))
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[6]尹祥础,尹灿.非线性系统的失稳与前兆——响应比理论及其应用[J].中科学(B辑),1991,21(5):512-518.(YIN Xiangchu,YIN Can.Instability and precursor of nonlinear system—response ratio theory and its application[J].Science in China(Series B),1991,21(5):512-518.(in Chinese))
[7]姜彤.边坡在地震作用力下的加卸载响应规律及非线性稳定分析[博士学位论文][D].北京:中地震局地质研究所,2004.(JIANG Tong.Load-unload responses of slopes under seismic load and nonlinear stability analysis[Ph.D.Thesis][D].Beijing:Institute of Geology,China Earthquake Administration,2004.(in Chinese))
[8]王裕仓,尹祥础,王海涛.地震预测的加卸载响应比岩石实验模拟[J].中地震,1998,14(2):126-130.(WANG Yucang,YIN Xiangchu,WANG Haitao.The simulation of rock experiment on load/unload response ratio on earthquake prediction[J].Earthquake Research in China,1998,14(2):126-130.(in Chinese))
[9]尹祥础,张晖辉.加卸载响应比的新进展[J].际地震动态,2005,(5):98-102.(YIN Xiangchu,ZHANG Huihui.New development of the load-unload response ratio(LURR)theory[J].Recent Developments in World Seismology,2005,(5):98-102.(in Chinese))
[10]周健,白冰,徐建平.土动力学理论与计算[M].北京:中建筑工业出版社,2001.(ZHOU Jian,BAI Bing,XU Jianping.Theory and calculation of soil dynamics[M].Beijing:China Architecture and Building Press,2001.(in Chinese))
[11]毛彦龙,胡广韬,毛新虎,等.地震滑坡启程剧动的机制研究及离散元模拟[J].工程地质学报,2001,9(1):74-80.(MAO Yanlong,HU Guangtao,MAO Xinhu,et al.Mechanism of set-out violent-slide of slope mass during earthquake and its simulation by using discrete element method[J].Journal of Engineering Geology,2001,9(1):74-80.(in Chinese))
[2]许强,黄润秋.用加卸载响应比理论探讨斜坡失稳前兆[J].中地质灾害与防治学报,1995,6(2):25-31.(XU Qiang,HUANG Runqiu.Studies on the precursor of slope instability applying to the load unload response ratio theory[J].The Chinese Journal of Geological Hazard and Control,1995,6(2):25-31.(in Chinese))
[3]贺可强,周敦云,王思敬.降雨型堆积层滑坡的加卸载响应比特征及其预测作用与意义[J].岩石力学与工程学报,2004,23(16):2665-2670.(HE Keqiang,ZHOU Dunyun,WANG Sijing.Features of load-unload response ratio and its significance in prediction of colluvial landslide induced by rainfall[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(16):2665-2670.(in Chinese))
[4]贺可强.堆积层滑坡位移信息分析与失稳趋势判据的研究[博士学位论文][D].北京:中科学院地质与地球物理研究所,2003.(HE Keqiang.Displacement information analysis and destabilized trend criterion of colluvial landslide[Ph.D.Thesis][D].Beijing:Institute of Geology and Geophysics,Chinese Academy of Sciences,2003.(in Chinese))
[5]姜彤,马莎,许兵,等.边坡在地震作用下的加卸载响应规律研究[J].岩石力学与工程学报,2004,23(22):3803-3807.(JIANG Tong,MA Sha,XU Bing,et al.Study on laws of load-unload response of slope under seismic load[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(22):3803-3807.(in Chinese))
[6]尹祥础,尹灿.非线性系统的失稳与前兆——响应比理论及其应用[J].中科学(B辑),1991,21(5):512-518.(YIN Xiangchu,YIN Can.Instability and precursor of nonlinear system—response ratio theory and its application[J].Science in China(Series B),1991,21(5):512-518.(in Chinese))
[7]姜彤.边坡在地震作用力下的加卸载响应规律及非线性稳定分析[博士学位论文][D].北京:中地震局地质研究所,2004.(JIANG Tong.Load-unload responses of slopes under seismic load and nonlinear stability analysis[Ph.D.Thesis][D].Beijing:Institute of Geology,China Earthquake Administration,2004.(in Chinese))
[8]王裕仓,尹祥础,王海涛.地震预测的加卸载响应比岩石实验模拟[J].中地震,1998,14(2):126-130.(WANG Yucang,YIN Xiangchu,WANG Haitao.The simulation of rock experiment on load/unload response ratio on earthquake prediction[J].Earthquake Research in China,1998,14(2):126-130.(in Chinese))
[9]尹祥础,张晖辉.加卸载响应比的新进展[J].际地震动态,2005,(5):98-102.(YIN Xiangchu,ZHANG Huihui.New development of the load-unload response ratio(LURR)theory[J].Recent Developments in World Seismology,2005,(5):98-102.(in Chinese))
[10]周健,白冰,徐建平.土动力学理论与计算[M].北京:中建筑工业出版社,2001.(ZHOU Jian,BAI Bing,XU Jianping.Theory and calculation of soil dynamics[M].Beijing:China Architecture and Building Press,2001.(in Chinese))
[11]毛彦龙,胡广韬,毛新虎,等.地震滑坡启程剧动的机制研究及离散元模拟[J].工程地质学报,2001,9(1):74-80.(MAO Yanlong,HU Guangtao,MAO Xinhu,et al.Mechanism of set-out violent-slide of slope mass during earthquake and its simulation by using discrete element method[J].Journal of Engineering Geology,2001,9(1):74-80.(in Chinese))
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