Abstract
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.
基金项目
国家自然科学基金(41972266)
中国博士后科学基金(2023M730432)
Special Funding for Chongqing Postdoctoral Research Project(2022CQBSHTB1010)
Chongqing Postdoctoral Science Foundation(CSTB2023NSCQ-BHX0223)
NETL
NSTL
万方数据