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| 1 | Slope stability analysis under seismic load by vector sum analysis method显示文摘The vibration characteristics and dynamic responses of rock and soil under seismic load can be estimated with dynamic finite element method(DFEM).Combining with the DFEM,the vector sum analysis method(VSAM) is employed in seismic stability analysis of a slope in this paper.Different from other conventional methods,the VSAM is proposed based on the vector characteristic of force and current stress state of the slope.The dynamic stress state of the slope at any moment under seismic load can be obtained by the DFEM,thus the factor of safety of the slope at any moment during earthquake can be easily obtained with the VSAM in consideration of the DFEM.Then,the global stability of the slope can be estimated on the basis of time-history curve of factor of safety and reliability theory.The VSAM is applied to a homogeneous slope under seismic load.The factor of safety of the slope is 1.30 under gravity only and the dynamic factor of safety under seismic load is 1.21.The calculating results show that the dynamic characteristics and stability state of the slope with input ground motion can be actually analyzed.It is believed that the VSAM is a feasible and practical approach to estimate the dynamic stability of slopes under seismic load. | Mingwei Guo Xiurun Ge Shuilin Wang | 2011 | Journal of Rock Mechanics and Geotechnical Engineering2011，3，3： | 14 |
| 2 | Principle of in-situ 3D rock stress measurement with borehole wall stress relief method and its preliminary applications to determination of in-situ rock stress orientation and magnitude in Jinping hydropower station显示文摘As a main constituent of geological body, the rock masses have distinct differences from other materials, one of which is that rock masses are initially stressed in their natural states. Hence, it is an extremely challenging and significant research project to know the present residual stress of the rock masses in the earth's crust. Although some regularities of distribution of in-situ rock stresses can be deduced, the basic means to study the state of rock stress is in-situ stress measurement. After a brief review of several measuring methods of in-situ 3D rock stress, a new one, borehole wall stress relief method (BWSRM) to determine the in-situ 3D rock stress tensor in a single drilled borehole was proposed. Based on the principle of in-situ rock stress measurement with BWSRM, an original geostress measuring instrument was designed and manufactured. Preliminary experiments for determination of in-situ stress orientation and magnitude were carried out at an experimental tunnel in Jinping Ⅱ hydropower station in China, where the buried depth of overburden was about 2430 m. The results showed that it was feasible to measure the in-situ 3D rock stresses with BWSRM presented in this paper. The BWSRM has a broad prospect for in-situ 3D rock stress measurements in practical rock engineering. | GE XiuRun HOU MingXun | 2012 | Science China(Technological Sciences)2012，55，4： | 12 |
| 3 | A MULTISCALE MECHANICAL MODEL FOR MATERIALS BASED ON VIRTUAL INTERNAL BOND THEORY显示文摘仅仅二个宏观的参数被需要描述线性有弹性的固体的机械性质,即泊松的比率和幼仔是模量。相应地,应该有二个显微镜的参数如果线性有弹性的固体的宏观的机械性质从显微镜的水平被导出,决定材料的机械性质。由这个想法照亮了,为材料的一个多尺度的机械模型,虚拟 multi-dimensionalinternal 契约(VMIB ) 模型,被把一张 shear 契约合并到虚拟内部契约(VIB ) 建议模型。由这修正, VMIB 模型联系宏有分离结构和相应关系在之间的显微镜的机械性质的材料的机械性质微并且宏参数被导出。精力密度功能的张肌质量,包含并列向量,算术地被证明。从观点 ofVMIB,材料的宏观的非线性的行为能被归因于强加的变丑导致的虚拟契约分发密度的进化。与这个理论假设,作为一个申请例子,易碎的材料的单轴的压缩失败被模仿。在试验性的结果和模仿的之间的好同意被发现。 | Zhang Zhennan Ge Xiurun Li Yonghe | 2006 | Acta Mechanica Solida Sinica2006，19，3： | 6 |
| 4 | Modified Mohr-Coulomb strength criterion considering rock mass intrinsic material strength factorization显示文摘With the increase of mining depth of mineral resources,the rock mass stress state is being more and more complex.The rock mass show different features,namely,with the increase of hydrostatic pressure,rock mass failure mode turns from brittle tension failure to structure ductile failure and its limit strength also increases.The restriction of minimal principal stress on the initiation and development of microcrack and the change of micro-unit stress state by the intermediate principal stress play a decisive role in the increase of rock mass limit strength.Based on the rock mass failure behavior law under complex stress state and the σ2-dependence on the rock mass strength,we proposed a Modified Mohr-Coulomb(M-MC) strength criterion which is smooth and convex.Finally,the M-MC criterion is validated by multiaxial test data of eight kinds of rock mass.We also compared the fitting results with Mohr-Coulomb criterion(MC).It shows that the new criterion fits the test data better than the Mohr-Coulomb criterion.So the M-MC strength criterion well reveals the rock mass bearing behavior and can be widely used in the rock mass strength analysis.The results can provide theoretical foundations for stability analysis and reinforcement design of complex underground engineering. | ZHANG Qiang,WANG Shuilin,GE Xiurun,WANG Hongying State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China | 2010 | Mining Science and Technology2010，20，5： | 4 |
| 5 | Triangular element partition method with consideration of crack tip显示文摘In fracture simulation,how to model the pre-existing cracks and simulate their propagation without remeshing is an important topic.The newly developed triangular element partition method(TEPM)provides an efficient approach to this problem.It firstly meshes the cracked body regardless of the geometry integrity of the interesting object with triangular elements.After the meshing procedure is completed,some elements are intersected by cracks.For the element intersected by a crack,the TEPM takes the element partition technique to incorporate the discontinuity into the numerical model without any interpolation enrichment.By this approach,the TEPM can simulate fracture without mesh modification.In the TEPM,all the cracked elements are treated as the usual partitioned elements in which the crack runs through.The virtual node pairs(the intersection points of crack faces and elements)at the opposite faces of the crack move independently.Their displacements are respectively determined by their neighbor real nodes(nodes formatted in the original mesh scheme)at the same side of the crack.However,among these cracked elements,the element containing a crack tip,referred to as the crack tip element thereafter,behaves differently from those cut through by the crack.Its influence on the singular field at the vicinity of the fracture tip becomes increasingly significant with the element size increasing.In the crack tip element,the virtual node pair at the crack tip move consistently before fracture occurs while the virtual node pair separate and each virtual node moves independently after the fracture propagates.Accordingly,the crack tip element is automatically transformed into the usual partitioned element.In the present paper,the crack tip element is introduced into the TEPM to account for the effect of the crack tip.Validation examples indicate that the present method is almost free from the element size effect.It can reach the same precision as the conventional finite element method under the same meshing scheme.But the TEPM is much more efficient and convenient than the conventional finite element method because the TEPM avoids the troubles that the conventional finite element method suffers,e.g.,the meshing problem of cracked body,modification of mesh scheme,etc.Though the extended finite element method can also avoid these troubles,it introduces extra degrees of freedom due to node interpolation enrichment.Due to the simplicity of the present TEPM,it is believed that its perspective should be highly inspiring. | ZHANG ZhenNan ZHENG Hong GE XiuRun | 2013 | Science China(Technological Sciences)2013，56，8： | 1 |
| 6 | An Improved PSO Based ANN with Simulated Annealing Technique 显示文摘 | Yi Da Ge Xiurun | 2005 | Neurocomputing2005，63，1： | 1 |
| 7 | Laboratory model tests and field investigations of EPB shield machine tunnelling in soft ground in Shanghai显示文摘 | Qianwei Xu Hehua Zhu Wenqi Ding Xiurun Ge | 2010 | Tunnelling and Underground Space Technology incorporating Trenchless Technology Research2010，，1： | 1 |
| 8 | An Improved PSO-based ANN with Simulated Annealing Technique显示文摘 | Yi Da Ge Xiurun | 2005 | Neurocomputing2005，63，11： | 1 |
| 9 | An improved PSO-based ANN with simulated annealing technique 显示文摘 | Yi Da Ge Xiurun | 2005 | Neurocomputing2005，63，： | 1 |
| 10 | A new approach for analyzing circular tunnel in strain-softening rock masses显示文摘 | Shuilin Wang Xiaotao Yin Hua Tang Xiurun Ge | 2009 | International Journal of Rock Mechanics and Mining Sciences2009，，1： | 1 |
| 11 | An improved PSO-based ANN with simulated annealing technique显示文摘 | YI Da GE Xiurun | 2005 | Neurocomputing2005，63，： | 1 |
| 12 | An improved PSO-based ANN with simulated annealing technique 显示文摘 | YI Da GE Xiurun | 2005 | Neurocomput- ing2005，63，： | 1 |
| 13 | An Improved PSO Based ANN with SimulatedAnnealing Technique显示文摘 | Yi Da Ge Xiurun | 2005 | Neurocomputing2005，63，11： | 1 |
| 14 | Numerical manifold space of Hermitian form and application to Kirchhoff’s thin plate problems显示文摘 | Hong Zheng Zhijun Liu Xiurun Ge | 2013 | Int J Numer Meth Engng2013，，9： | 1 |
| 15 | An improved PSO-based ANN with simula- ted annealing technique 显示文摘 | Yi Da Ge Xiurun | 2005 | Neurocomputing2005，63，： | 1 |
| 16 | An Improved PSO-based ANN with Simulated an Nealing Technique 显示文摘 | DA Y XIURUN G | 2005 | Neuro Computing2005，63，2： | 1 |
| 17 | Research on characteristics of the lateral settlement trough caused by shield construction显示文摘 | Qu Jili Ge Xiurun | | 0，，04： | 1 |
| 18 | An improved PSO-based ANN with simulated annealing technique显示文摘 | Yi Da Ge Xiurun | | 0，，： | 1 |
| 19 | An improved PSO-based ANN with simulated annealing technique显示文摘 | Yi Da Ge Xiurun | 2005 | Neurocomputing2005，63，： | 1 |
| 20 | Model of regularly Jointed rockmass with consideration of the influence of couple stresses显示文摘 | Ge Xiurun Feng Shuren | 1991 | computer Methods and Advances In eomechanics1991，，6： | 1 |
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