充填单节理岩体本构模型研究  

STUDY OF CONSTITUTIVE MODEL FOR SINGLE INFILLED JOINTED ROCK MASS

作　　者：肖卫国[1] 兑关锁[1] 朱玉萍[1] 陈铁林[1] 任青文[2] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]河海大学土木工程学院,江苏南京210098

出　　处：《岩石力学与工程学报》2010年第A02期3463-3468,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金资助项目(50539030);国家重点基础研究发展计划(973)项目(2010CB7321004)

摘　　要：根据以往充填节理的直剪试验结果,详细研究充填度对节理力学参数的影响。在分析几种充填节理岩体剪切强度模型的基础上,用经典的弹塑性理论提出充填节理岩体增量型应力与位移的本构模型,特别对节理剪切应力–位移曲线的硬化和软化特征进行研究。通过对比本文模型与已有试验点的剪切曲线,结果表明两者具有较好的吻合性,从而验证本文模型的正确性。According to the previous direct shear test results of infilled joint,the influence of the ratio of infilled thickness to asperity height on mechanical parameters of joint is detailly studied. On the basis of analyzing several kinds of shear strength models for jointed rock mass,the constitutive model for increment-type stress and displacement of infilled joint rock mass is proposed by using the elasto-plastic theory;and the hardening and softening characteristics of joint shear stress-displacement curve are especially studied. Through the comparison of shear curves of existing test sites,the results indicate that the proposed model curve agrees better with the experimental data,which identifies the correctness of the model.

关 键 词：岩石力学 充填节理 本构模型 剪胀 充填度 

分 类 号：TU45[建筑科学—岩土工程]