CAJ | 학술논문

提出了考虑宏微观损伤耦合的节理岩体本构模型,其中微观损伤模型采用基于应变强度准则和岩石微元强度服从Weibull分布的统计损伤模型,把其应用于被节理切割而成岩块.节理岩体损伤张量计算是该模型的一个关键问题,在已有的二维问题损伤张量计算方法的基础上对三维问题损伤张量计算方法进行了讨论.结果表明,所提出的本构模型能够较好地反映宏、微观两类损伤对岩体力学性能的影响.也能够较好地反映试件强度随围压的变化规律,因而较为合理.
제출료고필굉미관손상우합적절리암체본구모형,기중미관손상모형채용기우응변강도준칙화암석미원강도복종Weibull분포적통계손상모형,파기응용우피절리절할이성암괴.절리암체손상장량계산시해모형적일개관건문제,재이유적이유문제손상장량계산방법적기출상대삼유문제손상장량계산방법진행료토론.결과표명,소제출적본구모형능구교호지반영굉、미관량류손상대암체역학성능적영향.야능구교호지반영시건강도수위압적변화규률,인이교위합리.
@@@@The constitutive model of jointed rock mass is proposed here by coupling macroscopic and microscopic damage . The microscopic damage model adopts the statistical model based on strain strength criterion and Weibull distribution of rock-element’s strength ,which is used for rock blocks cut by joints .The calculation for the damage tensor of jointed rock mass is a key issue to this model .Therefore ,the calculation method for the damage tensor in 3-dimensional space is dis-cussed based on that in 2-dimensional space .The calculation results show that the constitutive model proposed here could better reflect the effect of macroscopic and microscopic damage on the mechanical proper of rock mass ,and perfectly re-flect the change law of specimen’s strength with confining pressure ,which is rather reasonable .