陡倾互层斜坡动力损伤能量特征识别方法研究

doi:10.13722/j.cnki.jrme.2020.0441

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Abstract For studying the damage evolution features of the interbedded slopes during the process of destruction under strong earthquake，and providing technical support for the slope seismic stability assessment，a centrifuge shaking table is conducted. The monitored acceleration data collected in model test is denoised，signal reconstruction and processed by HHT transformation. The relationships between the peak value of marginal spectrum，the entropy value and the development of slope damage are analyzed. A new method for identifying dynamic damage of steep interbedded slope by using the cumulative entropy of marginal spectrum is proposed. The results show that：(1) the deformation and failure mode of interbedded slope under strong earthquake is dynamic sliding-bending type，and the failure area of this kind of slope is shallow under strong earthquake. Its dynamic response presents significant near-slope effect. (2) The peak value and entropy value of marginal- spectrum of the damaged parts in a slope will change suddenly with increased seismic motion；however，only the entropy of marginal spectrum can quantify the damage degree of slope. (3) Compared with the two methods of the peak value variation and entropy value of marginal spectrum，the cumulative-entropy field chart of marginal spectrum can directly reflect the development process of damage and failure in slope，the damage degree of slope at different positions，the location of locking section and failure plane.

Key words： slope engineering interbedded rock slope centrifugal shaking table test marginal spectrum marginal spectral entropy damage identification

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	Articles by authors
	LI Longqi
	HE Chuan
	ZHAO Haoqiu
	WANG Mengyun
	JU Nengpan

Cite this article:

LI Longqi,HE Chuan,ZHAO Haoqiu, et al. Study on the characteristic identification method of dynamic damage energy of steeply inclined interbedded slopes[J]. , 2020, 39(S2): 3306-3315.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2020.0441 OR https://rockmech.whrsm.ac.cn/EN/Y2020/V39/IS2/3306

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