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Seismic dynamic response characteristics and failure mechanisms of an accumulation body slope

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Abstract

In order to study the dynamic characteristics and destabilisation damage mode of the accumulation body slope under the action of ground vibration, and to provide theoretical guidance and technical support for the optimization design of reinforcement of similar slopes, a large shaking table model (scale 1:16) test with a specific accumulation body slope was conducted as a prototype. The dynamic response and deformation characteristics of the model slopes were observed by inputting sine, Wolong, and EI Centro waves to the bottom of the model slopes, respectively. The test results showed that in the vertical direction and on the slope surface, the acceleration amplification factor (AAF) increased with the increasing of altitude, and presented a nonlinear change. In the horizontal direction, the AAF increased with distance from the slope surface. There was also a slope surface amplification effect with the AAF reaching its maximum at the slope shoulder. Similar laws were obtained after numerical simulation of the prototype slope by FLAC3D software. Different types of seismic waves exhibited different effects on the AAF. Sine waves showed the largest effect, followed by Wolong waves, and EI centro waves exhibited the smallest effect. The AAF of the modelled slope was different for different input wave frequencies. As the input frequency of Sine waves increased, the AAF increased first and then decreased. This change coincided with the AAF reaching its maximum value at 25–30 Hz. The AAF of the modelled slope varied when the input wave amplitude values were different. When the AAF reached its maximum value, the input amplitude was 0.4 g. By analysing the slope failure progression, it showed that the slope of an accumulation body began with local sliding at the front edge, followed by internal sliding of it, and the overall sliding.

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Acknowledgements

We thanked Sev Kender, PhD, from Liwen Bianji (Edanz) (www.liwenbianji.cn/) for editing the English text of a draft of this manuscript.

Funding

This research was sponsored by the National Key Research and Development Project of China (Grant No. 2019YFC1509704), the National Natural Science Foundation of China (Grant Nos. U1704243, 41741019, 41977249 and 42090052), Central Plains Science and Technology Innovation Leader Project (Grant No. 214200510030), the Henan Province Science and Technology Research Project (Grant No. 192102310006 and 232102320035). And the Doctoral Candidate Innovation Fund of the North China University of Water Resources and Electric Power.

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Correspondence to Dong Jinyu.

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The authors certify that this manuscript is original and has not been published and will not be submitted elsewhere for publication while being considered by Natural Hazards. And the study is not split up into several parts to increase the quantity of submissions and submitted to various journals or to one journal over time. No data have been fabricated or manipulated (including images) to support the conclusions. No data, text, or theories by others are presented as if they were our own.

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Xinglong, Y., Jinyu, D., Handong, L. et al. Seismic dynamic response characteristics and failure mechanisms of an accumulation body slope. Nat Hazards (2024). https://doi.org/10.1007/s11069-024-06451-1

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  • DOI: https://doi.org/10.1007/s11069-024-06451-1

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