基于灰色关联度的平原水库地震动力响应敏感性分析
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摘要
针对平原水库地震动力响应敏感性分析缺乏定量评价的问题,以某平原水库土石坝为例,选取坝体弹性模量、粘聚力、内摩擦角、水位、地震持时、地震振幅为影响参数,采用灰色关联分析法,定量分析了各项参数对地震动力响应的影响程度。结果表明,各项参数影响平原水库土石坝地震动力响应的敏感性从大到小依次为地震振幅、水位、地震持时、粘聚力、弹性模量、内摩擦角,定量敏感性分析结果符合平原水库土石坝地震动力响应一般规律。说明灰关联分析法简便、有效,可直观准确地获取主要因素和次要因素,能够广泛应用于平原水库地震动力响应的敏感性分析,为平原水库的抗震研究提供了一种有效方法。
Based on the lack of quantitative assessment of seismic dynamic response sensitivity analysis on the plain reservoir,taking an earth rockfill dam of plain reservoir as an example,the elastic modulus,cohesion,internal friction angle,water level,earthquake duration and seismic amplitude were selected as influencing parameters.The influence degree of various parameters on seismic dynamic response was quantitatively analyzed by means of grey correlation analysis.The results show that the descending order for sensitivity of various parameters affecting the seismic dynamic response of plain reservoirs is seismic amplitude,water level,earthquake duration,cohesion,elastic modulus and internal friction angle.The quantitative sensitivity analysis is consistent with the general rule of seismic dynamic response of plain reservoirs.It shows that gray correlation analysis method is simple and effective,and can obtain the main factors and secondary factors intuitively and accurately,which can be widely applied to the sensitivity analysis of seismic dynamic response of plain reservoirs,providing an effective basis for the seismic research on plain reservoirs.
Based on the lack of quantitative assessment of seismic dynamic response sensitivity analysis on the plain reservoir,taking an earth rockfill dam of plain reservoir as an example,the elastic modulus,cohesion,internal friction angle,water level,earthquake duration and seismic amplitude were selected as influencing parameters.The influence degree of various parameters on seismic dynamic response was quantitatively analyzed by means of grey correlation analysis.The results show that the descending order for sensitivity of various parameters affecting the seismic dynamic response of plain reservoirs is seismic amplitude,water level,earthquake duration,cohesion,elastic modulus and internal friction angle.The quantitative sensitivity analysis is consistent with the general rule of seismic dynamic response of plain reservoirs.It shows that gray correlation analysis method is simple and effective,and can obtain the main factors and secondary factors intuitively and accurately,which can be widely applied to the sensitivity analysis of seismic dynamic response of plain reservoirs,providing an effective basis for the seismic research on plain reservoirs.
引文
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[3]李荣彬,王刚.不同参数对土石坝地震动力响应影响[J].云南水力发电,2012,28(2):23-27.
[4]邹德高,徐斌,孔宪京.边界条件对土石坝地震反应的影响研究[J].岩土力学,2008(S1):101-106.
[5]张大鹏,马震岳.深厚覆盖层高土石坝地震加速度响应分析[J].水利与建筑工程学报,2012,10(5):161-164.
[6]张楚楚,孙少锐,王帅,等.马河崩塌体边坡稳定程度敏感性分析[J].河北工程大学学报:自然科学版,2016,33(3):52-56.
[7]栾茂田,李湛,范庆来.土石坝拟静力抗震稳定性分析与坝坡地震滑移量估算[J].岩土力学,2007,28(2):224-230.
[8]邓聚龙.灰理论基础[M].武汉:华中科技大学出版社,2002.
[9]陈志波,简文彬.边坡稳定性影响因素敏感性灰色关联分析[J].防灾减灾工程学报,2006,26(4):473-477.
[10]赵永虎,刘高,毛举,等.基于灰色关联度的黄土边坡稳定性因素敏感性分析[J].长江科学院院报,2015,32(7):94-98.
[11]陈育民,徐鼎平.FLAC/FLAC3D基础与工程实例(第2版)[M].北京:中国水利水电出版社,2013.
[12]朱亚林,孔宪京,邹德高,等.高土石坝地震反应和破坏机理分析[J].岩土工程学报,2010,32(9):1 362-1 367.
[13]邹烨,郭明伟,王水林,等.地震荷载下三维边坡动力稳定性分析[J].岩石力学与工程学报,2017,36(5):1 174-1 184.