Bonding Structured UH Model

被引：0

作者：

Zhu, En-yang ^{[1
,2
]}

Li, Xiao-qiang ^{[2
,3
]}

Yao, Yang-ping ^{[4
]}

机构：

[1] Beihang Univ, Sch Aeronaut Sci & Engn, Beijing 100191, Peoples R China

[2] North China Univ Technol, Sch Civil Engn, Beijing 100144, Peoples R China

[3] Beijing Univ Technol, Minist Educ, Key Lab Urban Secur & Disaster Engn, Beijing 100124, Peoples R China

[4] Beihang Univ, Sch Transportat Sci & Engn, Beijing 100191, Peoples R China

来源：

PROCEEDINGS OF GEOSHANGHAI 2018 INTERNATIONAL CONFERENCE: FUNDAMENTALS OF SOIL BEHAVIOURS | 2018年

关键词：

Bonding; Structured soil; Constitutive model; Moving normal compression line; Moving critical state line; UNIFIED HARDENING MODEL; SANICLAY;

D O I：

10.1007/978-981-13-0125-4_24

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Bonding in structured soil limits the relative motion between soil particles as deformation develops with loading. This makes the structured soil behave differently from the reconstituted soil. Based on the unified hardening (UH) model for overconsolidated soils, a new model is proposed to describe the stress-strain relations of structured soil. The new model is developed from the following aspects: (a) a moving normal compression line (MNCL) paralleling to the traditional normal compression line (NCL) in e-lnp plane is proposed by introducing a structure potential parameter to describe soil structure collapse in isotropic compression; (b) a moving critical state line (MCSL) paralleling to the traditional critical state line (CSL) in p-q plane is proposed by introducing a bonding parameter to describe stress ratio evolution influenced by bonding in shear. This parameter is adopted in the dilatancy equation to consider the bonding-dependent dilatancy of structured soil. Both of the above 2 structure parameters have clear physical meanings and can be determined or estimated by conventional tests. It has been analyzed that the proposed model is able to smoothly and continuously reflect the positive/negative dilatancy and strain hardening/softening of structured soil influenced by bonding and its decay.

引用

页码：218 / 225

页数：8

共 20 条

[1]

Adachi Toshihisa., 1995, Soils and Foundations, V35, P1

[2]

Anagnostopoulos A.G., 1991, Geotechnical and Geological Engineering, V9, P1, DOI [10.1007/BF00880981, DOI 10.1007/BF00880981]

[3]

Balasubramanian A. S., 1980, Soils and Foundations, V20, P1

[4]

Chen GS, 2006, PROCEEDINGS OF THE SECOND IASTED INTERNATIONAL CONFERENCE ON ENVIRONMENTAL MODELLING AND SIMULATION, P65

[5] SANICLAY: simple anisotropic clay plasticity model [J].

Dafalias, Yannis F. ;

Manzari, Majid T. ;

Papadimitriou, Achilleas G. .

INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS, 2006, 30 (12) :1231-1257

[6] Behaviour of cemented clay simulated via the theoretical framework of the Structured Cam Clay model [J].

Horpibulsuk, Suksun ;

Liu, Martin D. ;

Liyanapathirana, Deepa S. ;

Suebsuk, Jirayut .

COMPUTERS AND GEOTECHNICS, 2010, 37 (1-2) :1-9

[7] Mechanical behavior of artificially cemented clay with open structure: Cell and physical model analyses [J].

Jiang, Mingjing ;

Li, Tao ;

Cui, Yujun ;

Zhu, Hehua .

ENGINEERING GEOLOGY, 2017, 221 :133-142

[8] A constitutive model for structured soils [J].

Kavvadas, M ;

Amorosi, A .

GEOTECHNIQUE, 2000, 50 (03) :263-273

[9] A constitutive model for cemented clays capturing cementation degradation [J].

Lam Dinh Nguyen ;

Fatahi, Behzad ;

Khabbaz, Hadi .

INTERNATIONAL JOURNAL OF PLASTICITY, 2014, 56 :1-18

[10] Asymptotic state behaviour and its modeling for saturated sand [J].

Luo Ting ;

Yao YangPing ;

Chu Jian .

SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES, 2009, 52 (08) :2350-2358

← 1 2 →