| 岩石破坏非连续变形分析弹脆性本构模型的二次开发 |
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| 引用本文： | 李术才,陈云娟,朱维申,赵成龙,李利平,尹福强.岩石破坏非连续变形分析弹脆性本构模型的二次开发[J].岩土力学,2014,35(8):2144-2149. |
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| 作者姓名： | 李术才 陈云娟 朱维申 赵成龙 李利平 尹福强 |
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| 作者单位： | 1.山东大学 岩土与结构工程研究中心，济南 250061；2.山东省国土测绘院，济南 250102 |
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| 基金项目： | 国家自然科学基金重点项目（No. 51139004）；教育部博士点基金（No. 20110131110030）；中国博士后科学基金面上项目（No. 2012M521339）；山东省自然科学基金资助项目（No. ZR2011EL049）。 |
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| 摘 要： | 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。
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| 关 键 词： | 岩石非连续变形分析 弹脆性本构 强度准则 程序编制 室内试验 |
| 收稿时间： | 2014-03-26 |
Secondary development of elastic brittle constitutive model of discontinuous deformation analysis for rock failure |
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| LI Shu-cai,CHEN Yun-juan,ZHU Wei-shen,ZHAO Cheng-long,LI Li-ping,YIN Fu-qiang.Secondary development of elastic brittle constitutive model of discontinuous deformation analysis for rock failure[J].Rock and Soil Mechanics,2014,35(8):2144-2149. |
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| Authors: | LI Shu-cai CHEN Yun-juan ZHU Wei-shen ZHAO Cheng-long LI Li-ping YIN Fu-qiang |
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| Institution: | 1. Geotechnical and Structural Engineering Research Center, Shandong University, Jinan 250061, China; 2. Shandong Provincial Institute of Land Surveying and Mapping, Jinan 250102, China |
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| Abstract: | 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. |
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| Keywords: | discontinuous deformation analysis for rock failure(DDARF) elastic brittle constitutive strength criterion programming laboratory test |
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