考虑膨胀效应的UH模型及其有限元实现

罗汀; 张盼盼; 姚仰平; 刘月妙; 陈亮; 曹胜飞

doi:10.13700/j.bh.1001-5965.2015.0069

考虑膨胀效应的UH模型及其有限元实现

doi: 10.13700/j.bh.1001-5965.2015.0069

1.
北京航空航天大学交通科学与工程学院, 北京 100083
2. 核工业北京地质研究院环境工程研究所, 北京 100029

基金项目: 国家"973"计划(2014CB047001);国家自然科学基金(51179003,11272031,51579005)

详细信息

作者简介:
罗汀女,博士,教授,博士生导师。主要研究方向:土的基本特性和本构模型研究。Tel.:13671128963E-mail:tluo@buaa.edu.cn

通讯作者:
罗汀,Tel.:13671128963E-mail:tluo@buaa.edu.cn

中图分类号: TU43
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- 被引次数: 0
出版历程
- 收稿日期: 2015-01-31
- 网络出版日期: 2016-01-20

UH model considering expansion of soils and its finite element implementation

1.
School of Transportation Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
2. Division of Environment Engineering, Beijing Research Institute of Uranium Geology, Beijing 100029, China

Funds: National Basic Research Program of China (2014CB047001); National Natural Science Foundation of China (51179003,11272031,51579005)

摘要

摘要: 超固结非饱和土统一硬化(UH)模型在分析超固结非饱和土问题中有广泛的适用性,其不仅可以使超固结状态下的湿化模拟更为合理,也能够反映超固结非饱和土的硬化、软化等特性。在超固结非饱和土本构模型的基础上,考虑土体团粒的吸水膨胀作用,提出了考虑膨胀效应的UH模型。该模型只比超固结非饱和土UH模型增加了一个参数,不仅能够描述普通加载路径下超固结膨润土的应力应变特性,还能反映其在湿化路径下的膨胀效应。基于有限元软件的二次开发平台,进行了考虑膨润土膨胀效应UH模型的有限元实现,并通过对三轴试验和膨胀力试验的数值模拟,验证了模型子程序的合理性。
- 高庙子(GMZ)膨润土 /
- 吸力 /
- 超固结 /
- 膨胀效应 /
- 有限元
Abstract: The unified hardening model (UH model) for overconsolidated unsaturated soils is applicable to problems involving unsaturated soils. The wetting behaviors of unsaturated soils in overconsolidated condition can be described more reasonably using this model. It can also describe strain-hardening and softening behaviors of the unsaturated soils better. Based on the UH model for unsaturated soils, a new UH model for bentonite was proposed by considering the expansion of the soil aggregates. With just one more parameter, the proposed model can not only describe the stress-strain behaviors of the bentonite under general loading paths,but also describe the expansion of the bentonite under wetting paths. Based on the secondary development platform of finite element software, the UH model considering the expansion of the bentonite has been implemented. The subroutine was proved to be reasonable through the simulation of the triaxial test and the swelling pressure test using the proposed model.
- Gaomiaozi (GMZ) bentonite /
- suction /
- overconsolidation /
- inflation /
- finite element

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参考文献(16)

[1]	王驹,陈伟明,苏锐,等.高放废物地质处置及其若干关键科学问题[J].岩石力学与工程学报,2006,25(4):801-812. WANG J,CHEN W M,SU R,et al.Geological disposal of high-level radioactive waste and its key scientific issues[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(4):801-812(in Chinese).
[2]	马利科,刘月妙,曹胜飞.高庙子膨润土膨胀力影响因素研究[C]//第三届废物地下处置学术研讨会论文集.北京:中国原子能出版社,2010:423-429. MA L K,LIU Y M,CAO S F.Studies on the influence factors of GMZ bentonite's swelling pressure[C]//The Third Academic Seminar on Underground Waste Disposal.Beijing:China Atomic Energy Press,2010:423-429(in Chinese).
[3]	姚仰平,周安楠,侯伟.砂土硬化特征的描述及其试验验证[J].北京航空航天大学学报,2006,32(10):1186-1192. YAO Y P,ZHOU A N,HOU W.Description of hardening characteristics of sand and its confirmation[J].Journal of Beijing University of Aeronautics and Astronautics,2006,32(10):1186-1192(in Chinese).
[4]	姚仰平,牛雷,崔文杰,等.超固结非饱和土的本构关系[J].岩土工程学报,2011,33(6):834-839. YAO Y P,NIU L,CUI W J,et al.UH model for unsaturated soils[J].Chinese Journal of Geotechnical Engineering,2011,33(6):834-839(in Chinese).
[5]	罗汀,郭敏.K₀固结黏土的渐近状态模拟[J].工业建筑,2011,41(9):35-37. LUO T,GUO M.Asymptotic state modelling for K₀ consolidated clay[J].Industrial Construction,2011,41(9):35-37(in Chinese).
[6]	罗汀,田新国.考虑土渐进状态特性的应力应变关系[J].北京航空航天大学学报,2010,36(3):315-332. LUO T,TIAN X G.Stress-strain in incremental law in asymptotic state for soils[J].Journal of Beijing University of Aeronautics and Astronautics,2010,36(3):315-332(in Chinese).
[7]	侯伟,姚仰平.统一硬化模型在复杂加载条件下的应用[J].北京航空航天大学学报,2008,34(9):1105-1108. HOU W,YAO Y P.Application of unified hardening model under complex loading[J].Journal of Beijing University of Aeronautics and Astronautics,2008,34(9):1105-1108(in Chinese).
[8]	刘月妙,王驹,谢敬礼,等.微机控制高温高压膨胀渗透仪的研制和应用[C]//第四届废物地下处置学术研讨会论文集.北京:中国原子能出版社,2012:73-78. LIU Y M,WANG J,XIE J L,et al.High temperature and high pressure apparatus for swelling pressure and permeability of buffer material and its application[C]//The Forth Academic Eeminar on Underground Waste Disposal.Beijing:China Atomic Energy Press,2012:73-78(in Chinese).
[9]	CUI Y J,TANG A M,QIAN L X,et al.Thermal-mechanical behavior of compacted GMZ bentonite[J].Soils and Foundation,2011,51(6):1065-1074.
[10]	叶为民,SCHANZ T,钱丽鑫,等.高压实高庙子膨润土GMZ01的膨胀力特征[J].岩石力学与工程学报,2007,26(S2):3861-3865. YE W M,SCHANZ T,QIAN L X,et al.Characteristics of swelling pressure of densely compacted Gaomiaozi bentonite GMZ01[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(S2):3861-3865(in Chinese).
[11]	秦冰,陈正汉,刘月妙,等.高庙子膨润土GMZ001三向膨胀力特性研究[J].岩土工程学报,2009,31(5):756-763. QIN B,CHEN Z H,LIU Y M,et al.Characteristics of 3D swelling pressure of GMZ001 bentonite[J].Chinese Journal of Geotechnical Engineering,2009,31(5):756-763(in Chinese).
[12]	王乃东,姚仰平.广义非线性强度与广义滑动面[J].北京航空航天大学学报,2011,37(1):101-105. WANG N D,YAO Y P.Generalized nonlinear strength and general mobilized plane[J].Journal of Beijing University of Aeronautics and Astronautics,2011,37(1):101-105 (in Chinese).
[13]	罗汀,张盼盼,姚仰平,等.超固结非饱和土UH模型的有限元实现[J].世界核地质科学,2014,31(S1):322-326. LUO T,ZHANG P P,YAO Y P,et al.Finite element realization of the UH model for unsaturated soils[J].World Nuclear Geoscience,2014,31(S1):322-326(in Chinese).
[14]	YAO Y P,HOU W,ZHOU A N.UH model:Three-dimensional unified hardening model for overconsolidated clays[J].Geotechnique,2009,59(5):451-469.
[15]	罗汀,秦振华,姚仰平,等.UH模型切线刚度矩阵对称化及其应用[J].力学学报,2011,43(6):1186-1190. LUO T,QIN Z H,YAO Y P,et al.Symmetrization and application of tangent stiffness matrix for UH model[J].Chinese Journal of Theoretical and Applied Mechanics,2011,43(6):1186-1190(in Chinese).
[16]	姚仰平,冯兴,黄祥,等.UH模型在有限元分析中的应用[J].岩土力学,2010,31(1):237-245. YAO Y P,FENG X,HUANG X,et al.Application of UH model to finite element analysis[J].Rock and Soil Mechanics,2010,31(1):237-245(in Chinese).