CAJ | 학술논문

岩石材料是一种非均质材料，而破裂岩是指岩体内部含有大量的裂隙、空洞、界面等缺陷，在荷载作用下其微元体破坏更具有随机性。在损伤理论的基础上，从微元体的强度随机分布的角度出发，在微元体强度度量方法上考虑损伤阈值的影响，假设破裂岩的微元体强度服从Weibull分布，结合考虑中主应力的SMP准则，建立破裂岩统计损伤软化本构模型，运用多种计算方法对模型参数m和F0进行确定。通过对小官庄铁矿2种破裂岩闪长玢岩以及矽卡岩的验证表明：在不同围压下，全应力-应变试验曲线与预测曲线吻合良好，能够反映损伤阈值的影响，且在较低围压下更为理想。同时，此模型能够反映随着围压的增加岩石的峰值强度增加而延性增大的性质，进一步验证模型的适用性及较强的应用价值。
암석재료시일충비균질재료，이파렬암시지암체내부함유대량적렬극、공동、계면등결함，재하재작용하기미원체파배경구유수궤성。재손상이론적기출상，종미원체적강도수궤분포적각도출발，재미원체강도도량방법상고필손상역치적영향，가설파렬암적미원체강도복종Weibull분포，결합고필중주응력적SMP준칙，건립파렬암통계손상연화본구모형，운용다충계산방법대모형삼수m화F0진행학정。통과대소관장철광2충파렬암섬장분암이급석잡암적험증표명：재불동위압하，전응력-응변시험곡선여예측곡선문합량호，능구반영손상역치적영향，차재교저위압하경위이상。동시，차모형능구반영수착위압적증가암석적봉치강도증가이연성증대적성질，진일보험증모형적괄용성급교강적응용개치。
The rock material is a kind of non-homogeneous material and there are a large number of defects such as fissures,voids,interfaces in the broken rock. Its micro units damage more randomness under the loads. Starting from micro units strength are random distribution on the basis of damage theory,a method for measuring microcosmic element strength of rock is presented with consideration of damage threshold. Assuming the micro units strength of broken rock obey Weibull distribution,combined with the SMP criterion,which considers the intermediate principal stress,the statistical damage softening constitutive model is built. And the model parameters m and F0 are computed using some methods. Through the calculation results of two kinds of broken rock in Xiaoguanzhuang indicate that:the predicted stress-strain curves under different confining pressures agree well with the test data,and it can reflect not only the influence of damage threshold but also more desirable in the lower confining pressures. At the same time,this model can reflect the characteristic that the peak strength increases and ductility increases with the confining pressure increase,which further shows that the applicability of the model and a strong application value.