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Sliding element simulating the response of slip surfaces and its application for the prediction of earthquake-induced landslide movement using one-dimensional dynamic analyses
Landslides ( IF 6.7 ) Pub Date : 2021-02-01 , DOI: 10.1007/s10346-020-01615-z
Baofeng Di , Loukas Katsenis , Constantine A. Stamatopoulos , Vassilis P. Panoskaltsis

Earthquake-induced landslides involve excessive movement of slopes, usually along slip surfaces. This seismic movement of slopes may depend crucially on (a) the soil response along the slip surface, which may include strain softening; (b) the rotation of the sliding mass with displacement towards a gentler configuration; and (c) the dynamic response of the soil profile above the underlying bedrock. Ordinary finite element methods cannot be applied to predict large localized movement along slip surfaces. Even though effects (a)–(c) above have been studied in the bibliography, a cost-effective method for simultaneous simulation to predict the seismic displacement along slip surfaces has not been found in the bibliography. The present work proposes such a cost-effective method. For this purpose, first a new sliding element is introduced which simulates effects (a) and (b) above. For effect (b), a new empirical expression is proposed and validated, while effect (a) is simulated by a previously proposed constitutive model. Then, this element replaces the slip-stick constant resistance element at a previously proposed one-dimensional non-linear dynamic model. A numerical solution of the new model is developed and applied at the well-documented Nikawa landslide. The application illustrated that the method is able to predict the displacement of the landslide, as well as the manner that (i) the stiffness of the soil profile, (ii) the shear stress–displacement response along the slip surface, and (iii) the rotation of the sliding mass affect this displacement.



中文翻译:

模拟滑动面响应的滑动元及其在一维动力分析中预测地震诱发滑坡运动中的应用

地震诱发的滑坡涉及坡度的过度运动,通常沿着滑坡面。斜坡的这种地震运动可能主要取决于(a)沿滑动面的土壤响应,其中可能包括应变软化;(b)滑动块的旋转,其位移朝着更平缓的方向移动;(c)下层基岩上方土壤剖面的动态响应。普通的有限元方法不能应用于预测沿滑移面的大局部运动。尽管在书目中已经研究了上述效应(a)-(c),但在书目中却没有找到一种经济有效的方法来同时模拟以预测沿滑动面的地震位移。本工作提出了一种成本有效的方法。以此目的,首先,引入一个新的滑动元素,该元素可模拟上述效果(a)和(b)。对于效果(b),提出并验证了新的经验表达式,而效果(a)由先前提出的本构模型模拟。然后,该元件在先前提出的一维非线性动力学模型中代替了滑动恒定电阻元件。开发了新模型的数值解,并将其应用在有据可查的Nikawa滑坡上。该应用说明,该方法能够预测滑坡的位移,以及(i)土壤剖面的刚度,(ii)沿滑动面的切应力-位移响应和(iii)位移的方式。滑动块的旋转会影响该位移。提出并验证了一种新的经验表达式,而效果(a)由先前提出的本构模型模拟。然后,该元件在先前提出的一维非线性动力学模型中代替了滑动恒定电阻元件。开发了新模型的数值解,并将其应用在有据可查的Nikawa滑坡上。该应用说明,该方法能够预测滑坡的位移,以及(i)土壤剖面的刚度,(ii)沿滑动面的切应力-位移响应和(iii)的方式。滑动块的旋转会影响该位移。提出并验证了一种新的经验表达式,而效果(a)由先前提出的本构模型模拟。然后,该元件在先前提出的一维非线性动力学模型中代替了滑动固定电阻元件。开发了新模型的数值解,并将其应用在有据可查的Nikawa滑坡上。该应用说明,该方法能够预测滑坡的位移,以及(i)土壤剖面的刚度,(ii)沿滑动面的切应力-位移响应和(iii)位移的方式。滑动块的旋转会影响该位移。该元件在先前提出的一维非线性动力学模型中代替了滑动固定电阻元件。开发了新模型的数值解,并将其应用在有据可查的Nikawa滑坡上。该应用说明,该方法能够预测滑坡的位移,以及(i)土壤剖面的刚度,(ii)沿滑动面的切应力-位移响应和(iii)位移的方式。滑动块的旋转会影响该位移。该元件在先前提出的一维非线性动力学模型中代替了滑动固定电阻元件。开发了新模型的数值解,并将其应用在有据可查的Nikawa滑坡上。该应用说明,该方法能够预测滑坡的位移,以及(i)土壤剖面的刚度,(ii)沿滑动面的切应力-位移响应和(iii)位移的方式。滑动块的旋转会影响该位移。

更新日期:2021-02-01
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