NUMERICAL ANALYSIS OF SUBSOIL WITH THREE DIFFERENT CONSTITUTIVE MODELS

Abstract The paper presents results of numerical calculations of a diaphragm wall model executed in Poznań clay formation. Two selected FEM codes were applied, Plaxis and Abaqus. Geological description of Poznań clay formation in Poland as well as geotechnical conditions on construction site in Warsaw city area were presented. The constitutive models of clay implemented both in Plaxis and Abaqus were discussed. The parameters of the Poznań clay constitutive models were assumed based on authors’ experimental tests. The results of numerical analysis were compared taking into account the measured values of horizontal displacements.

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Numerical analysis of settlement of a high-rise building using two constitutive soil models

MATEC Web of Conferences ◽

10.1051/matecconf/201926204002 ◽

2019 ◽

Vol 262 ◽

pp. 04002

Author(s):

Leszek Chomacki

Keyword(s):

Numerical Analysis ◽

Constitutive Models ◽

Soil Parameters ◽

Geotechnical Parameters ◽

High Rise ◽

High Rise Building ◽

Perfectly Plastic ◽

Calculation Process ◽

Elastic Perfectly Plastic ◽

Key Parameter

One of the basic roles of foundations is to safely transfer loads from the structure to the subsoil in a controlled manner. Often a key parameter in deciding whether the foundation was designed correctly is the value of settlement of the building and the ground around it. This paper attempts to numerically reproduce the measured settlement of a high-rise building using geotechnical parameters already available. For this purpose, numerical calculations were carried out using two constitutive soil models: the elastic-perfectly plastic model with Mohr-Coulomb plastic criteria (MC) model and the Hardening Soil (HS) model. The resulting settlement values were compared with surveying measurements taken during and after the building’s construction. In the summary the results obtained with the use of different constitutive models, the calculation process and the adopted soil parameters are analysed and discussed.

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Numerical analysis for viscoelastic fluid flow with distributed/variable order time fractional Maxwell constitutive models

Applied Mathematics and Mechanics ◽

10.1007/s10483-021-2796-8 ◽

2021 ◽

Vol 42 (12) ◽

pp. 1771-1786

Author(s):

Yanli Qiao ◽

Xiaoping Wang ◽

Huanying Xu ◽

Haitao Qi

Keyword(s):

Fluid Flow ◽

Numerical Analysis ◽

Viscoelastic Fluid ◽

Constitutive Models ◽

Variable Order

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An Overview of the Impact of Constitutive Models for Unbound Materials on Pavement Elastic Response Through Numerical Analysis

Transportation Infrastructure Geotechnology ◽

10.1007/s40515-021-00187-2 ◽

2021 ◽

Author(s):

Brad Cliatt ◽

Andreas Loizos ◽

Christina Plati

Keyword(s):

Numerical Analysis ◽

Constitutive Models ◽

Elastic Response ◽

The Impact

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Parameter Analysis on Hardening Soil Model of Soft Soil for Foundation Pits Based on Shear Rates in Shenzhen Bay, China

Advances in Materials Science and Engineering ◽

10.1155/2020/7810918 ◽

2020 ◽

Vol 2020 ◽

pp. 1-11 ◽

Cited By ~ 1

Author(s):

Yanbin Fu ◽

Siyue He ◽

Sizhan Zhang ◽

Yong Yang

Keyword(s):

Numerical Analysis ◽

Analytical Methods ◽

Soft Soil ◽

Constitutive Models ◽

Parameter Analysis ◽

Shear Rates ◽

Secant Stiffness ◽

The Stability ◽

The Relationship ◽

Hardening Soil Model

The hardening soil (HS) model is the most commonly used constitutive models of soft soil of foundation pits of PLAXIS software in numerical analysis, and its parameters are prerequisite for accurate calculation. In this paper, relevant parameters of the HS model in Shenzhen Bay in China were studied through one-dimensional consolidation tests and triaxial shear tests. Analytical methods of reference secant stiffness and failure ratio of soft soil were systematically studied, the influence of shear rates on reference secant stiffness and failure ratio of soft soil was analyzed, and the relationship between stiffness parameters and compressive modulus of soft soil was established. The results showed that reference secant stiffness and failure ratio of soft soil obtained by different analytical methods were quite different, and the errors of reference secant stiffness and failure ratio of soft soil obtained by stress-strain curves were the smallest and the stability was the best; at the same time, with increase of shear rates, the peak deviator stress and reference secant stiffness of soft soil increased, but failure ratio did not change much. The research results could provide a reference of parameter analysis of soft soil for the HS model in the numerical analysis and similar working conditions of foundation pits.

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Numerical analysis and monitoring of Pappadai dam

Canadian Geotechnical Journal ◽

10.1139/t05-079 ◽

2005 ◽

Vol 42 (6) ◽

pp. 1631-1643 ◽

Cited By ~ 18

Author(s):

Piernicola Lollino ◽

Federica Cotecchia ◽

Lidija Zdravkovic ◽

David M Potts

Keyword(s):

Numerical Analysis ◽

Soil Structure ◽

Pore Water Pressure ◽

Water Pressure ◽

Constitutive Models ◽

Foundation Soil ◽

Reservoir Impoundment ◽

Stiff Clay ◽

Pressure Changes ◽

Deformation Patterns

This paper presents a case history for the construction of the Pappadai dam in Italy. The dam is constructed from rockfill, with an upstream bituminous membrane, and is built on stiff clay foundations. The instrumentation of the dam and of the foundation soil provides detailed insight into the deformation patterns and pore-water pressure changes during dam construction and for the subsequent 7 years. Two-dimensional plane-strain finite element analyses, using fairly simple constitutive models for soil and rockfill behaviour, were performed to reproduce the soilstructure interaction so that the effects of reservoir impoundment, which has yet to be carried out, could be investigated. The paper shows that a careful choice of parameters and an understanding of the mechanical behaviour of the in situ soils can result in satisfactory predictions of the overall soilstructure interaction.Key words: rockfill, stiff clay, dam, field data, numerical analysis.

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