首页|Dynamic damage evolution of bank slopes with serrated structural planes considering the deteriorated rock mass and frequent reservoir-induced earthquakes

Dynamic damage evolution of bank slopes with serrated structural planes considering the deteriorated rock mass and frequent reservoir-induced earthquakes

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To investigate the dynamic damage evolution characteristics of bank slopes with serrated structural planes,the shaking table model test and the numerical simulation were utilized.The main findings indi-cate that under continuous seismic loads,the deformation of the bank slope increased,particularly around the hydro-fluctuation belt,accompanying by the pore water pressure rising.The soil pressure increased and then decreased showed dynamic variation characteristics.As the undulation angle of the serrated structural planes increased(30°,45°,and 60°),the failure modes were climbing,climbing-gnawing,and gnawing respectively.The first-order natural frequency was used to calculate the damage degree(Dd)of the bank slope.During microseisms and small earthquakes,it was discovered that the evo-lution of Dd followed the"S"shape,which was fitted by a logic function.Additionally,the quadratic func-tion was used to fit the Dd during moderately strong earthquakes.Through the numerical simulation,the variation characteristics of safety factors(Sf)for slopes with serrated structural planes and slopes with straight structural planes were compared.Under continuous seismic loads,the Sf of slopes with straight structural planes reduce stalely,whereas the Sf for slopes with serrated structural planes was greater than the former and the reduction rate was increasing.

Rock bedded slopeSerrated structural planesReservoir-induced earthquakesHydro-fluctuation beltDamage evolution

Xinrong Liu、Yan Wang、Bin Xu、Xiaohan Zhou、Xueyan Guo、Luli Miao

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School of Civil Engineering,Chongqing University,Chongqing 400045,China

State Key Laboratory of Coal Mine Disaster Dynamic and Control,Chongqing University,Chongqing 400044,China

School of River and Ocean Engineering,Chongqing Jiaotong University,Chongqing 400045,China

国家自然科学基金中国博士后科学基金Special Funding for Chongqing Postdoctoral Research ProjectChongqing Postdoctoral Science Foundation

419722662023M7304322022CQBSHTB1010CSTB2023NSCQ-BHX0223

2023

10.1016/j.ijmst.2023.07.004

矿业科学技术学报(英文版)
中国矿业大学

矿业科学技术学报(英文版)

CSTPCDCSCDEI
影响因子：1.222
ISSN：2095-2686
年,卷(期)：2023.33(9)
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