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断层-围岩系统
相关语句
  fault band and elastic rock system
     Numerical simulation of formation process and snap-back for a fault band and elastic rock system
     断层-围岩系统的形成过程及快速回跳数值模拟
短句来源
     Numerical simulation of influence of loading rate on deformation characteristics and snap-back for fault band and elastic rock system
     加载速度对断层-围岩系统变形及快速回跳的影响
短句来源
  “断层-围岩系统”译为未确定词的双语例句
     Influences of loading rate on the stress level when a system composed of fault band and elastic rock was formed,the size of plastic zones,the patterns of localized shear band,the maximum load-carrying capability of the system,and on the stress level when the snap-back of the system occurred were modeled numerically by FLAC(Fast Lagrangian Analysis of Continua).
     在平面应变状态下,采用拉格朗日元法模拟了加载速度对断层-围岩系统形成时的应力水平、塑性区尺寸及剪切带图案、系统的最大承载能力以及快速回跳发生时的应力水平的影响。
短句来源
  相似匹配句对
     Numerical simulation of formation process and snap-back for a fault band and elastic rock system
     断层-系统的形成过程及快速回跳数值模拟
短句来源
     Numerical simulation of influence of loading rate on deformation characteristics and snap-back for fault band and elastic rock system
     加载速度对断层-系统变形及快速回跳的影响
短句来源
     Research of Forecasting Deformation of the Roadway Rock System
     巷道系统变形预测研究
短句来源
     AN EXPERT SYSTEM FOR ROCK MASSES CLASSIFICATION OF RAILROAD TUNNELING ENGINEERING
     铁路隧道分类的专家系统
短句来源
     Hierachical analogy system metlmd for the classifiction of surrounding rocks of tunnel
     隧道分类的层次类比系统方法
短句来源
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Stability analysis is made on the system composed of fault band and surrounding elastic rockmasses considering water weakening and strain gradient. The deformation of ductile fault after rock burst is investigated. It is found from experimental measurement that the shear strength and the absolute value of the slope of stress and strain curve are decreased with water content. Considering the deterioration of strength,the distribution rules of plastic shear strain and total plastic shear strain in shear band are...

Stability analysis is made on the system composed of fault band and surrounding elastic rockmasses considering water weakening and strain gradient. The deformation of ductile fault after rock burst is investigated. It is found from experimental measurement that the shear strength and the absolute value of the slope of stress and strain curve are decreased with water content. Considering the deterioration of strength,the distribution rules of plastic shear strain and total plastic shear strain in shear band are proposed based on gradient-dependent plasticity. Besides,the relation between shear force and relative plastic shear displacement is also presented. The analytical result shows that the plastic shear strain and the plastic shear displacement decrease with water content. Larger water content leads to shorter elastic stage,lower dissipated potential energy and lower external force work. In addition,the released elastic strain energy increases as water content decreases. According to the analytical solution of axial stress-axial strain curve of rock specimen in uniaxial compression proposed by authors and experimental results,water content affects the softening modulus. The post-peak slope of shear stress and shear displacement curve of the system is presented considering the influence of water content on the softening modulus. It is shown that increment of water content reduces the possibility of instability.

研究了岩石含水量对断层-围岩系统稳定性及岩爆(冲击地压)对韧性断层变形的影响。含水量不仅影响岩石强度,也对应力-应变曲线应变软化阶段斜率有影响。基于梯度塑性理论和水致弱化函数,得到了剪切带内部的塑性剪切应变、总剪切应变及塑性剪切位移的分布规律。此外,还得到了不同含水量时剪力-塑性剪切位移的关系。研究结果表明:随着岩石含水量的增加,塑性剪应变降低,塑性剪切位移降低;含水量越大,则弹性阶段越短,耗散势能越小,外力功越小,断层岩爆释放的弹性能量也越小;岩石的含水量增加,则断层-围岩系统不容易发生失稳。

The formation process of the system composed of fault band and elastic rock block and the shear displacement distribution across a fault band were modeled numerically by FLAC.The adopted failure criterion was a composite Mohr-Coulomb criterion with tension cut-off and the post-peak constitutive rela- tion of rock was linear strain-softening.Once two shear bands combine to form a fault band,the system is formed,subsequently leading to the decrease in load-carrying capacity of the system.On one side of the fault...

The formation process of the system composed of fault band and elastic rock block and the shear displacement distribution across a fault band were modeled numerically by FLAC.The adopted failure criterion was a composite Mohr-Coulomb criterion with tension cut-off and the post-peak constitutive rela- tion of rock was linear strain-softening.Once two shear bands combine to form a fault band,the system is formed,subsequently leading to the decrease in load-carrying capacity of the system.On one side of the fault band,snap-back occurs due to the sharp recovery of elastic strain in strain-softening process,indicat- ing the unstable failure.Nearly uniform displacement distribution is observed outside the fault band.A higher displacement gradient exists within the band and increases with the decrease in load-carrying capacity of the system.Snap-back of the zone far away from the loading end is the earliest.Then,the size of the snap-back zone propagating towards the loading end increases until snap-back of the entire system takes place.The process only needs a few time steps,reflecting the abrupt occurrence of instability of the sys- tem.Snap-back of the entire system occurs in the strain-softening stage of a stress-strain curve.

采用 FLAC 模拟了断层-围岩系统的形成过程及位移的分布规律.计算中采用了莫尔-库仑与拉破坏复合的破坏准则,峰后岩石本构关系为线性应变软化.两条断层带(或剪切带)汇交时系统形成,之后其承载能力下降.在断层带左侧,由于在系统承载能力降低的过程中,弹性应变的快速恢复,出现了快速回跳现象(系统失稳).在断层带之外,位移分布是均匀的.在断层带位置, 存在较大的位移梯度.系统承载能力越低,位移梯度越大.远离加载端的区域先回跳,然后回跳区域逐渐扩大,向加载端传播,直到整个系统都回跳.上述过程持续的时间步数较少,说明了系统失稳的突发性.系统整体回跳发生于应变软化阶段.

Influences of loading rate on the stress level when a system composed of fault band and elastic rock was formed,the size of plastic zones,the patterns of localized shear band,the maximum load-carrying capability of the system,and on the stress level when the snap-back of the system occurred were modeled numerically by FLAC(Fast Lagrangian Analysis of Continua).The adopted failure criterion was a composite Mohr-Coulomb criterion with tension cut-off;and a linear strain-softening post-peak constitutive relation...

Influences of loading rate on the stress level when a system composed of fault band and elastic rock was formed,the size of plastic zones,the patterns of localized shear band,the maximum load-carrying capability of the system,and on the stress level when the snap-back of the system occurred were modeled numerically by FLAC(Fast Lagrangian Analysis of Continua).The adopted failure criterion was a composite Mohr-Coulomb criterion with tension cut-off;and a linear strain-softening post-peak constitutive relation of rock was adopted.In general,after fault band-elastic body system is generated,the load-carrying capability of the system reaches its maximum value.Thereafter,it begins to decrease so that the system is in strain-softening stage.If the post-peak stiffness of compressive stress-compressive displacement curve for the monitored element at loading end of plane strain specimen is high enough,the snap-back(unstable failure) of the system occurs.As loading rate increases,the stress level corresponding to the formation of the system and the corresponding displacement increase;the maximum load-carrying capability of the system and the corresponding displacement increase;the stress level when the snap-back of the system occurs and the corresponding displacement increase.As loading rate increases,the number of yielded elements increases and the thickness of fault band no loner remains a constant,leading to an increase in deformation resistant of the system.For higher loading rate,it is possible that higher shear strain rates are concentrated into both fault band and some elements remaining elastic outside the band.

在平面应变状态下,采用拉格朗日元法模拟了加载速度对断层-围岩系统形成时的应力水平、塑性区尺寸及剪切带图案、系统的最大承载能力以及快速回跳发生时的应力水平的影响。在数值计算中,采用了莫尔-库仑与拉破坏复合的破坏准则。峰后岩石的本构关系为线性应变软化。通常断层带-围岩系统形成之后系统的承载能力达到最大,之后系统的承载能力开始下降处于应变软化状态。当位于试样加载端上的单元的压缩应力-压缩位移曲线的峰后刚度足够大时,系统就会发生弹性回跳现象,即失稳破坏。随着加载速度的增加,断层带-围岩系统形成时的应力水平、断层带-围岩系统的最大承载能力、快速回跳发生时的应力水平及上述三者所对应的加载端部位移都增加,屈服单元数目增多,塑性区域不再保持平直,这都将大大增加系统的变形阻力。当加载速度较大时,较高的剪切应变率集中在断层带位置及断层带之外的弹性体的某些区域都是可能的。

 
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