强震作用下边坡屈服加速度计算方法的改进

doi:10.13722/j.cnki.jrme.2017.1495

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Abstract Newmark rigid-block analysis is a permanent displacement calculation method which has been widely used in practice. However，the traditional method can only apply to the shallow linear slip surfaces which slip directions are close to the slope angle. In order to extend this method to circle slip surface and deep linear slip surface，the functions to calculate the seismic yield coefficient are improved based on the traditional methods. Then the permanent displacements of different slip surfaces are analyzed and compared with other Newmark methods including slices method and finite element decoupled method and the influences of slope height，angle and the form of slip surface on seismic yield coefficient are studied. Finally the proposed method is compared with large shaking table test. The results show that，when the slip surface is large，the traditional Newmark method is underestimated the permanent displacement of circle and deep linear slip surface. The improved Newmark method shows the great agreement with slicing methods and finite element decoupled method. The yield acceleration is related with stability coefficient，the range of slip surface and slope angle. The relationship between different levels of earthquake intensities and permanent displacement shows a good agreement with large shaking table test，which confirms that the modified Newmark method inherits the traditional method′s advantages and has better precision and wider application.

Key words： slope engineering seismic slope permanent displacement Newmark method shaking table test

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	Articles by authors
	QIN Yuqiao1
	2
	TANG Hua1
	DENG Qin1
	YIN Xiaotao1
	DAN Luzhao3

Cite this article:

QIN Yuqiao1,2,TANG Hua1, et al. Improvement on the calculation method of slope critical acceleration under strong earthquake[J]. , 2019, 38(S2): 3439-3447.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2017.1495 OR https://rockmech.whrsm.ac.cn/EN/Y2019/V38/IS2/3439

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