CAJ | 학술논문

岩石非连续变形分析方法DDARF成功实现了模拟岩体裂纹萌生、扩展、贯通、破碎的全过程，但算法只考虑了岩体的线弹性本构模型，没有分析岩体的非线性应力-应变关系。为更符合真实岩体工程，同时扩展岩石非线性本构模型的应用范围，分别采用摩尔-库仑强度准则和最大拉应力强度准则对岩体进行剪切和拉伸破坏判断；对理想弹脆性本构模型进行算法分析，并在VC++平台下程序实现；对“自定义”的岩体非连续变形分析方法弹脆性本构模型与室内单轴压缩试验进行比较分析；将岩体非连续变形分析方法弹脆性本构模型应用于大型地下洞室开挖，并与线弹性本构模型进行对比。结果表明，非连续变形分析方法中自定义岩体弹脆性本构模型是可行的，它能够反映岩体变形的非线性特征，与室内试验吻合度较好；非连续变形分析方法弹脆性本构模型应用于大型地下工程，能更安全且真实地分析洞室围岩的稳定性，进而更好地指导地下洞室的防护措施。
암석비련속변형분석방법DDARF성공실현료모의암체렬문맹생、확전、관통、파쇄적전과정，단산법지고필료암체적선탄성본구모형，몰유분석암체적비선성응력-응변관계。위경부합진실암체공정，동시확전암석비선성본구모형적응용범위，분별채용마이-고륜강도준칙화최대랍응력강도준칙대암체진행전절화랍신파배판단；대이상탄취성본구모형진행산법분석，병재VC++평태하정서실현；대“자정의”적암체비련속변형분석방법탄취성본구모형여실내단축압축시험진행비교분석；장암체비련속변형분석방법탄취성본구모형응용우대형지하동실개알，병여선탄성본구모형진행대비。결과표명，비련속변형분석방법중자정의암체탄취성본구모형시가행적，타능구반영암체변형적비선성특정，여실내시험문합도교호；비련속변형분석방법탄취성본구모형응용우대형지하공정，능경안전차진실지분석동실위암적은정성，진이경호지지도지하동실적방호조시。
DDARF (discontinuous deformation analysis for rock failure) has successfully realized the simulation on crack initiation, propagation, penetration and crushing of rock mass;but this algorithm only considers the linear elastic constitutive model and doesn’t analyze the nonlinear stress-strain relationship of rock mass. For more accordding to the real rock engineering, and expanding the application scope of DDARF’s nonlinear constitutive model, Mohr-Coulomb strength criterion and the maximum tensile stress strength criterion are respectively used to judge shear and tensile damage for rock mass; the algorithm of ideal elastic brittle constitutive model is analyzed, and is programmed based on VC++platform. Custom DDARF elastic brittle constitutive model for rock mass is comparatively analyzed with the laboratory uniaxial compression test; DDARF elastic brittle constitutive model is applied to large underground cavern excavation, and compared with the linear elastic constitutive model. Results show that, custom elastic brittle constitutive model for rock mass of DDARF is feasible;this elastic brittle constitutive model can reflect the nonlinear deformation characteristics of rock mass, and coincides with the laboratory experiment well. DDARF elastic brittle constitutive model is applied to large underground engineering, the stability of the surrounding rock mass can be more safely and truly analyzed, and the protective measures of underground caverns can be well guided.