定法向刚度下结构面剪切力学行为数值分析
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摘要
研究岩体结构面的力学性质对评价岩体工程的稳定性具有重要意义。根据Patton剪胀公式并结合ABAQUS软件中接触面滑动判定法则推导出定法向刚度下规则锯齿刚性结构面的剪胀公式,同时建立了相应的数值模型,两者计算结果一致。按锯齿倾角和法向刚度建立了16种结构面剪切模型,对各种模型的剪切位移曲线进行了分析,提出了一个参数:变形影响比。结果表明,变形影响比越大,锯齿变形承担的剪切位移越多。根据Seidel和Haberfield的试验建立相应的数值模型,计算结果与试验数据有较好的一致性,验证了ABAQUS在模拟粗糙结构面剪切方面的适用性。
It is important to study the mechanical properties of rock joint to evaluate the stability of rock mass engineering.According to Patton shear dilatancy formula and contact surface sliding judgement rule with ABAQUS software,the shear dilatancy formula of regular serrated rigid joint subjected to constant normal stiffness is derived and the corresponding numerical models are established.The calculation results of numerical models and theoretical formula are in agreement.The 16 different shear models are established based on the different serrated angle and normal stiffness.Shear stress—displacement curves are analyzed and influence ratio of deformation is presented.The results show that the larger the ratio is,the more shear displacement the serrated deformation will subject to.On the basis of Seidel and Haberfield test,the corresponding numerical models are established and the calculation results are in agreement too,which prove that ABAQUS software in simulating the shear behavior of rough joint is feasible.
It is important to study the mechanical properties of rock joint to evaluate the stability of rock mass engineering.According to Patton shear dilatancy formula and contact surface sliding judgement rule with ABAQUS software,the shear dilatancy formula of regular serrated rigid joint subjected to constant normal stiffness is derived and the corresponding numerical models are established.The calculation results of numerical models and theoretical formula are in agreement.The 16 different shear models are established based on the different serrated angle and normal stiffness.Shear stress—displacement curves are analyzed and influence ratio of deformation is presented.The results show that the larger the ratio is,the more shear displacement the serrated deformation will subject to.On the basis of Seidel and Haberfield test,the corresponding numerical models are established and the calculation results are in agreement too,which prove that ABAQUS software in simulating the shear behavior of rough joint is feasible.
引文
1杜时贵.岩体结构面的工程性质.北京:地震出版社,1999
2 Davis R O,Salt G.Strength of undulating shear surfaces in rock. G eotechnique 1986;(36):503 - 509
3 Kveldsvik V,Nilsen B,Einstein H H,et al..Alternative approaches for analyzes ofa 100,000m~3 rock slide based on Barton -Bandis shear strength criterion.Landslides 2008;(5):161 - 176
4 Armand G,Boulon M J,Papadopoulos C,et al..Mechanical behaviour of Dionysos marble smooth joints:I.Experiments.In: Mechanics of jointed and faulted rock:Proceedings of the 3rd international conference,MJFR-3,1998.159 - 164
5 Haberfield C M,Johnson I W.A mechanistically-based model for rough rock joints.Int.J.Rock Mech Min.Sci.Geomech.Abstr. 1994;31:279 - 292
6丁增志.齿形节理渐近破坏直剪试验研究.西部探矿工程,2007,19(3):1-4
7高文龙,姜耀东,湛川.软弱结构面表面形态与充填度的力学特性研究.工程地质学报,2010,18(1):127-131
8 Goodman R E,Taylor R L,Brekke T L.A model for the mechanics of jointed rock.Soil Mech Found.Div.,Proc ASCE,1968; 94:637 - 659
9易成,王长军,刘晋艳,等.两体接触面剪切力学行为的三维数值分析.岩土力学,2008,29(8):2149-2156
10 Goodman R E,Dubois J.Duplication of dilatancy in analysis of jointed rocks.J.Soil Mech.Fourd Div.,Proc ASCE,1972;98: 399 - 422
11 Heuze F E,Barbour T G.New models for rock joints and interfaces. J.Geotech.Eng.Div.,Proc ASCE,1982;108:757 - 776
12 Leichnitz W.Mechanical properties of rock joints.Int.J.Rock Mech.Min.Sci.Geomech.Abstr.1985;22:313 - 321
13 Seidel J P,Haberfield C M.A theoretical model for rock joints subjected to constant normal stiffness direct shear.Int.Rock Mech.Min.Sci.2002;39:539 - 553
2 Davis R O,Salt G.Strength of undulating shear surfaces in rock. G eotechnique 1986;(36):503 - 509
3 Kveldsvik V,Nilsen B,Einstein H H,et al..Alternative approaches for analyzes ofa 100,000m~3 rock slide based on Barton -Bandis shear strength criterion.Landslides 2008;(5):161 - 176
4 Armand G,Boulon M J,Papadopoulos C,et al..Mechanical behaviour of Dionysos marble smooth joints:I.Experiments.In: Mechanics of jointed and faulted rock:Proceedings of the 3rd international conference,MJFR-3,1998.159 - 164
5 Haberfield C M,Johnson I W.A mechanistically-based model for rough rock joints.Int.J.Rock Mech Min.Sci.Geomech.Abstr. 1994;31:279 - 292
6丁增志.齿形节理渐近破坏直剪试验研究.西部探矿工程,2007,19(3):1-4
7高文龙,姜耀东,湛川.软弱结构面表面形态与充填度的力学特性研究.工程地质学报,2010,18(1):127-131
8 Goodman R E,Taylor R L,Brekke T L.A model for the mechanics of jointed rock.Soil Mech Found.Div.,Proc ASCE,1968; 94:637 - 659
9易成,王长军,刘晋艳,等.两体接触面剪切力学行为的三维数值分析.岩土力学,2008,29(8):2149-2156
10 Goodman R E,Dubois J.Duplication of dilatancy in analysis of jointed rocks.J.Soil Mech.Fourd Div.,Proc ASCE,1972;98: 399 - 422
11 Heuze F E,Barbour T G.New models for rock joints and interfaces. J.Geotech.Eng.Div.,Proc ASCE,1982;108:757 - 776
12 Leichnitz W.Mechanical properties of rock joints.Int.J.Rock Mech.Min.Sci.Geomech.Abstr.1985;22:313 - 321
13 Seidel J P,Haberfield C M.A theoretical model for rock joints subjected to constant normal stiffness direct shear.Int.Rock Mech.Min.Sci.2002;39:539 - 553
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