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| 1 | Breach mechanism and numerical simulation for seepage failure of earth-rock dams显示文摘In this study,a numerical model,which can capture the full process of the development of seepage passages,the collapse of dams and the failure due to overtopping,is proposed for earth-rock dams.The critical incipient velocity for the occurrence of seepage failure is derived by analyzing the forces acting on soil particles in the seepage passage.The sediment transport formula is proposed to simulate the erosion process and the evolution of breach within the dam.In this model,the grain size distribution,the compaction density and the strength of dam materials are reasonably accounted for.Furthermore,the influences of the direction of seepage paths,the slope of the dam and the velocity of water flow on the amount of erosion are also taken into consideration.The proposed model and the corresponding numerical programs are employed to simulate the development of breaches and discharge of two typical cases due to seepage failure.The development of breaches,the history of discharge and the peak flood flux predicted by the numerical models are rather comparable to the measured data,which confirms the validity of the proposed model and the feasibility of applying the model in evaluating the disaster consequences and preparing the emergency counter measurements in the case of dam collapse. | CHEN ShengShui ZHONG QiMing CAO Wei | 2012 | Science China(Technological Sciences)2012，55，6： | 8 |
| 2 | Hypoplastic constitutive modelling of the wetting induced creep of rockfill materials显示文摘Discrete element simulations of one-dimensional compression of breakable granular assemblies were performed to investigate the capability of the exponential compression equation suggested by Bauer.The relationship between the so-called solid hardness and the particle strength was studied so as to provide a physical background for the introduction of a time-dependent solid hardness.A hyperbolic flow rule,describing the relationship between the inclination of the strain path and the stress ratio during wetting,was proposed based on typical triaxial wetting experiments on two different rockfill materials.The flow rule was then extended and incorporated into the transformed stress based hypoplastic model to capture the direction of creep strains.Meanwhile,a new density factor was introduced to the extended model to take into account the dependence of the magnitude of creep strains on the packing density.The stiffness tensor given by the extended model was discussed and the flowchart for the integration of the constitutive equation was designed.The extended model was then embedded into a finite element program and used to simulate the triaxial compression and wetting experiments performed on the aforementioned rockfill materials.Good agreement between the model predictions and the measured results lends sufficient credibility to the extended model in reproducing the stress-stain behaviour under loading and the creep behaviour during wetting.The extended model and the finite element program were also used to investigate the deformation behaviour of an earth-rock dam at the end of construction and during first impounding.The familiar phenomena such as the wetting induced settlement of the upstream shell and the movement of the dam crest towards the upstream were successfully captured by the numerical model,which confirms the feasibility of applying the extended model to dam engineering in the future. | FU ZhongZhi CHEN ShengShui LIU SiHong | 2012 | Science China(Technological Sciences)2012，55，7： | 6 |
| 3 | A generalized plasticity model for the stress-strain and creep behavior of rockfill materials显示文摘The generalized plasticity constitutive equations that simulate, in a unified manner, the stress-strain response and the creep behavior of rockfill materials are derived using the concept of elastoplasticity. A single yield surface is assumed to capture the onset of plastic strains with, however, two separate potential functions for the stress-induced plastic strains and the creep strains,respectively. The involved tensors and scalars are then specified directly, following the generalized plasticity method, to substantiate the constitutive equations. The model thus obtained is verified using triaxial compression experiments, true triaxial experiments and triaxial creep experiments. The effectiveness of the model is also demonstrated by a successful application in studying the behavior of a high concrete face rockfill dam(CFRD). It is found that for a high CFRD with a long construction period, neglecting the creep of rockfill materials during construction results in an underestimation of the deformation of the dam.The deformation and stress of the concrete slabs may also be considerably underestimated. | FU ZhongZhi CHEN ShengShui WEI KuangMin | 2019 | Science China(Technological Sciences)2019，62，4： | 5 |
| 4 | Simultaneous determination of dopamine and serotonin on the glassy carbon electrode coated with carbon nanotubes film显示文摘 | Kangbing Wu Junjie Fei Shengshui Hu | 2003 | Anal Bioehem2003，318，： | 1 |
| 5 | LiBOB as salt for lithium ion batteries 显示文摘 | Xu Kang Zhang Shengshui Richard Jow T | 2002 | Electrochemical and Solid - State Letters2002，5，1： | 1 |
| 6 | A review on the separators of liquidelectrolyte Li-ion batteries显示文摘 | ZHANG Shengshui | 2007 | Journal of PowerSources:2007，21，164： | 1 |
| 7 | Electrochemical study and selective determination of dopamine at muhi-wall carbon nanotube-Nafion film coated glassy carbon electrode 显示文摘 | Wu Kangbing Hu Shengshui | 2004 | Microchim Acta2004，144，： | 1 |
| 8 | The Effect of the Charging Protocol on the Cy- cle Life of a L-ion Battery 显示文摘 | Zhang Shengshui | 2006 | Journal of Power Source2006，161，： | 1 |
| 9 | Mercury-free simultaneous determination of cadmium and lead at a glassy carbon electrode modified with multi-wall carbon nanotubes显示文摘 | WU KANGBING HU SHENGSHUI FEI JUNJIE | 2003 | Analytiea Chimica Acta2003，489，： | 1 |
| 10 | Simultaneous determination of dopamine and serotonin on a glassy carbon electrode coated with a film of carbon nanotubes显示文摘 | WU KANGBING FEI JUNJIE SHENGSHUI HU | 2003 | Analytical Biochemistry2003，318，： | 1 |
| 11 | A review on the separators of liquid electrolyte Li-ion batteries 显示文摘 | ZHANG Shengshui | 2007 | Journal of Power Sources2007，164，： | 1 |
| 12 | Electrocatalytic oxidation of nitric oxide at nano-TiO2/Nafion composite film modified glassy carbon electrode显示文摘 | WANG Yazhen LI Chunya HU Shengshui | 2006 | J Solid State Electrochem2006，10，6： | 1 |
| 13 | A review on electrolyte additives for lithium-ion batteries显示文摘 | Zhang Shengshui | 2006 | Power Sources2006，162，： | 1 |
| 14 | Electrochemicai detectin of parathionat glassy carbon electrode modified with hexadecane显示文摘 | Xu Cuiling Wu Kangbing Hu Shengshui | 2002 | Anal Bioanal Chem2002，373，： | 1 |
| 15 | Chemical analysis of graphite/ electrolyte interface formed in LiBOB based electrolytes 显示文摘 | Xu Kang Lee U Zhang Shengshui | 2003 | Electrochemical and Solid-State Letters2003，6，7： | 1 |
| 16 | Direct electron-transfer of myo?globin within a new zwitterionic Gemini surfactant film and its analytical application for H202 detection显示文摘 | Wang Fang Hu Shengshui | 2008 | Colliods and Sur?faces B: Biointerfaces2008，63，2： | 1 |
| 17 | Voltammetric determination of diethylstilbestrol at carbon paste electrode using cetylpyridine bromide as medium显示文摘 | Shenghui Zhang Kangbing Wu Shengshui Hu | 2002 | Talanta2002，，58： | 1 |
| 18 | Study of the charging process of a licoo2-based li-ion battery显示文摘 | Zhang Shengshui Xu K Jow R T | 2006 | Power Sources2006，160，： | 1 |
| 19 | Simultaneous determination of dopamine and serotonin on the glassy carbon electrode coated with carbon nanotubes film显示文摘 | Kangbing Wu Junjie Fei Shengshui Hu | 2003 | Anal Biochem2003，318，： | 1 |
| 20 | A review on the separators of liquid electrolyte Li-ion batteries 显示文摘 | Zhang ShengShui | 2007 | Journal of Power Sources2007，164，1： | 1 |
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