Abstract
To study the cumulative damage evolution law of multi-anchor circular piles (MACP) under earthquake action, data such as acceleration and axial force of anchor cables of MACP were obtained by shaking table tests. An index of plastic effect coefficient (PEC) was proposed to quantitatively analyze the damage degree of MACP. The influence of multi-factor coupling on the cumulative damage evolution law of MACP was clarified. A landslide deformation prediction method with the axial force of anchor cable as a monitoring index was established. The results confirmed that PEC fully considered the plastic deformation characteristics of concrete materials and was more effective than the pile peak displacement (PPD) in evaluating the seismic cumulative damage effect of MACP. The cumulative damage of MACP was a result of multi-factor coupling, and multiple earthquakes led to a nonlinear increase in the damage degree of MACP. The axial force-ground motion intensity curve of the anchor cable was similar to the landslide deformation curve. The use of the axial force of the anchor cable to predict the deformation of MACP-reinforced landslides was recommended based on the idea of monitoring landslide deformation by Newton force.
Highlights
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The shaking table test of multi-anchor circular piles (MACP) reinforced landslide was carried out.
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A plastic effect coefficient (PEC) was proposed to quantitatively analyze the damage degree of MACP.
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The influence of multi-factor coupling on the cumulative damage evolution law of MACP was elucidated.
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A landslide deformation prediction method using the axial force of the anchor cable as a monitoring index was proposed.
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Acknowledgements
The authors gratefully acknowledge the financial support by the Gansu Provincial Youth Science and Technology Fund Project (No. 22JR5RA777), National natural science foundation(No. 42377154), Science and Technology Research and Development Plan of China Railway Co., Ltd. (2022-Major Project-07), Gansu Province Technology Innovation Guidance Plan-Enterprise R & D Institutions Capacity Building Special Funding (No. 23CXJA0011).
Funding
Gansu Provincial Youth Science and Technology Fund Project, 22JR5RA777,Hong Wei,National natural science foundation, 42377154,Zhigang Tao, Science and Technology Research and Development Plan of China Railway Co.,Ltd.,2022-Major Project-07, Honggang Wu,Gansu Province Technology Innovation Guidance Plan-Enterprise R & D Institutions Capacity Building Special Funding,23CXJA0011, Honggang Wu
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Wei, H., Tao, Z., He, M. et al. The Cumulative Damage Evolution Law Of Multi-Anchor Circular Piles Reinforced Landslide Under Earthquake Action. Rock Mech Rock Eng (2024). https://doi.org/10.1007/s00603-024-03857-y
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DOI: https://doi.org/10.1007/s00603-024-03857-y