| 考虑变形模量劣化的应变软化模型在FLAC3D中的开发与验证 |
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| 引用本文： | 李英杰,张顶立,刘保国. 考虑变形模量劣化的应变软化模型在FLAC3D中的开发与验证[J]. 岩土力学, 2011, 32(Z2): 647-652 |
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| 作者姓名： | 李英杰 张顶立 刘保国 |
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| 作者单位： | 北京交通大学土木建筑工程学院;辽宁工程技术大学力学与工程学院; |
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| 基金项目： | 铁道部重大项目(No.2009G005-B); 国家重点基础研究发展计划(973)项目(No.2010CB732100) |
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| 摘 要： | FLAC3D软件中的应变软化本构模型是通过抗剪强度参数劣化来实现的,没有考虑变形模量劣化造成的影响。针对这一问题,采用了变形模量劣化的损伤本构模型,详细推导了劣化损伤本构模型的差分格式,研究该模型在FLAC3D中二次开发的流程,在VC++环境下实现了劣化损伤本构模型在FLAC3D中的二次开发;通过与深埋圆形洞室应变软化数值解算例对比,进一步验证了该模型弹塑性和损伤的力学性质,分析了变形模量劣化对围岩变形特性的影响。由于该模型能够反映围岩的劣化损伤特性和大变形特点,因此在工程应用中有一定的实用价值。
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| 关 键 词： | 变形模量劣化 应变软化 FLAC3D二次开发 深部圆形隧洞 |
| 收稿时间： | 2011-03-31 |
Development and verification of strain-softening model considering deformation modulus degradation in FLAC~(3D) |
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| LI Ying-jie,,ZHANG Ding-li,LIU Bao-guo. Development and verification of strain-softening model considering deformation modulus degradation in FLAC~(3D)[J]. Rock and Soil Mechanics, 2011, 32(Z2): 647-652 |
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| Authors: | LI Ying-jie ZHANG Ding-li LIU Bao-guo |
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| Affiliation: | 1.School of Civil Engineering and Architecture, Beijing Jiaotong University, Beijing 100044, China; 2. Institute of Mechanics and Engineering, Liaoning Technical University, Fuxin, Liaoning 123000, China |
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| Abstract: | The strain-softening constitutive model in the fast Lagrangian analysis of continua in three dimensions(FLAC3D) implemented by shear strength parameters degrading and neglecting the influences of deformation-modulus degradation.For this case,based on the damage constitutive model of deformation modulus degradation,the difference scheme is deduced in detail;and the flow diagram of the model in FLAC3D as well as the secondary developed degradation damage constitutive model in FLAC3D with VC++ environment are ... |
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| Keywords: | deformation modulus degradation strain-softening FLAC3D secondary development deep circular tunnel |
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