基于广义自洽理论的岩石统计损伤模型研究  

On Statistical Damage Constitutive Model for Rock Based on General Self-consistent Theory

作　　者：文建华[1] 周翠英[1] 彭苗[2] 

机构地区：[1]中山大学工学院,广州510275 [2]厦门理工学院土木工程与建筑系,福建厦门361024

出　　处：《路基工程》2011年第4期1-3,共3页Subgrade Engineering

基　　金：国家863高技术研究发展计划(No.2007AA11Z112);国家自然科学基金(No.40672194);高等学校博士学科点基金(No.20060558060);广东省自然科学基金重点项目(No.06104932);广东省科技计划项目(No.2004B10101002)

摘　　要：为考虑岩石内微裂纹间相互作用对岩石损伤的影响,基于广义自洽理论研究岩石材料的损伤效应,建立了反映荷载作用下的岩石微裂纹发展变化损伤本构模型;采用概率统计理论,对岩石损伤模型中微裂纹密度演变过程进行探讨;以模式分层优化算法反分析确定模型参数,并结合工程实例对岩石微裂纹统计损伤模型及参数确定方法进行了验证。研究结果表明,基于广义自洽理论的岩石微裂纹统计损伤本构模型能够反应岩石内微裂纹间的相互影响的工程实际,模式分层优化算法确定的模型参数真实可信,在工程应用中具有一定适用价值。To disclose the influence of micro-crack interaction on rock damage,based on the general self-consistent theory of rock material damage effects,a rock damage constitutive model is established to reflect the full process of rock failure under loads.According to probability and statistics theory,the development of micro-crack density is explored in rock damage model.Then,the hierarchical pattern search,an effective parameter inversion analysis method,is used to determine the rock damage model parameters.And rock damage model and parameters determination method are verified combined with engineering examples.The results showed that the proposed damage constitutive model can reflect the actual interaction among micro-cracks based on general self-consistent theory in engineering.Model parameters determined by hierarchical pattern search are authentic and reliable,which can be applied in practical engineering.

关 键 词：广义自洽理论 损伤本构模型 微裂纹密度 模式分层优化算法 

分 类 号：TU751.6[建筑科学—建筑技术科学]