Finite element modelling of seismic performance of an excavation supported by propped diaphragm walls in a natural structured clay soil

Kateryna Oliynyk; Giulia Ferraro; Claudio Tamagnini

doi:10.1007/978-3-031-34761-0_66

Finite element modelling of seismic performance of an excavation supported by propped diaphragm walls in a natural structured clay soil

Kateryna Oliynyk, Giulia Ferraro, Claudio Tamagnini

Civil Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

A series of non-linear FE simulations of the behavior of excavations in natural structured clays supported by diaphragm walls under seismic loading conditions has been performed to investigate the effects of the initial degree of structure and of the destructuration rate on the performance of the structure, quantified in terms of permanent displacements and rotations of the walls. In order to reproduce the main characteristics of the cyclic/dynamic soil response at very small to medium-large strain levels, a recently proposed hypoplastic model for clay has been used to describe the soil behavior. In the model, an additional scalar state variable (sensitivity s) allows to incorporate the effects of soil structure. The results show that, while destructuration effects are almost negligible during the static excavation stage, the progressive degradation induced by the earthquake shaking may induce a significant increase in the accumulated permanent displacements, mostly controlled by the destructuration rate of the material.

Original language	English
Title of host publication	Geotechnical Engineering in the Digital and Technological Innovation Era
Editors	Alessio Ferrari, Marco Rosone, Maurizio Ziccarelli, Guido Gottardi
Publisher	Springer
Pages	544-552
Number of pages	9
ISBN (Electronic)	9783031347610
ISBN (Print)	9783031347603, 9783031347634
DOIs	https://doi.org/10.1007/978-3-031-34761-0_66
Publication status	Published - 17 Jun 2023
Event	VIII Convegno Nazionale dei Ricercatori di Ingegneria Geotecnica: 8th Italian Conference of Researchers in Geotechnical Engineering - Università degli Studi di Palermo, Palermo, Italy Duration: 5 Jul 2023 → 7 Jul 2023 https://www.cnrig23.community.unipa.it/

Publication series

Name	Springer Series in Geomechanics and Geoengineering
ISSN (Print)	1866-8755
ISSN (Electronic)	1866-8763

Conference

Conference	VIII Convegno Nazionale dei Ricercatori di Ingegneria Geotecnica
Abbreviated title	CNRIG 2023
Country/Territory	Italy
City	Palermo
Period	5/07/23 → 7/07/23
Internet address	https://www.cnrig23.community.unipa.it/

Keywords

Diaphragm Walls
Hypoplasticity
Performance-Based Design
Structured Clays

ASJC Scopus subject areas

Geotechnical Engineering and Engineering Geology
Mechanics of Materials

Access to Document

10.1007/978-3-031-34761-0_66

Cite this

Oliynyk, K., Ferraro, G., & Tamagnini, C. (2023). Finite element modelling of seismic performance of an excavation supported by propped diaphragm walls in a natural structured clay soil. In A. Ferrari, M. Rosone, M. Ziccarelli, & G. Gottardi (Eds.), Geotechnical Engineering in the Digital and Technological Innovation Era (pp. 544-552). (Springer Series in Geomechanics and Geoengineering). Springer . https://doi.org/10.1007/978-3-031-34761-0_66

Oliynyk, Kateryna ; Ferraro, Giulia ; Tamagnini, Claudio. / Finite element modelling of seismic performance of an excavation supported by propped diaphragm walls in a natural structured clay soil. Geotechnical Engineering in the Digital and Technological Innovation Era. editor / Alessio Ferrari ; Marco Rosone ; Maurizio Ziccarelli ; Guido Gottardi. Springer , 2023. pp. 544-552 (Springer Series in Geomechanics and Geoengineering).

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title = "Finite element modelling of seismic performance of an excavation supported by propped diaphragm walls in a natural structured clay soil",

abstract = "A series of non-linear FE simulations of the behavior of excavations in natural structured clays supported by diaphragm walls under seismic loading conditions has been performed to investigate the effects of the initial degree of structure and of the destructuration rate on the performance of the structure, quantified in terms of permanent displacements and rotations of the walls. In order to reproduce the main characteristics of the cyclic/dynamic soil response at very small to medium-large strain levels, a recently proposed hypoplastic model for clay has been used to describe the soil behavior. In the model, an additional scalar state variable (sensitivity s) allows to incorporate the effects of soil structure. The results show that, while destructuration effects are almost negligible during the static excavation stage, the progressive degradation induced by the earthquake shaking may induce a significant increase in the accumulated permanent displacements, mostly controlled by the destructuration rate of the material.",

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Oliynyk, K, Ferraro, G & Tamagnini, C 2023, Finite element modelling of seismic performance of an excavation supported by propped diaphragm walls in a natural structured clay soil. in A Ferrari, M Rosone, M Ziccarelli & G Gottardi (eds), Geotechnical Engineering in the Digital and Technological Innovation Era. Springer Series in Geomechanics and Geoengineering, Springer , pp. 544-552, VIII Convegno Nazionale dei Ricercatori di Ingegneria Geotecnica, Palermo, Italy, 5/07/23. https://doi.org/10.1007/978-3-031-34761-0_66

Finite element modelling of seismic performance of an excavation supported by propped diaphragm walls in a natural structured clay soil. / Oliynyk, Kateryna; Ferraro, Giulia; Tamagnini, Claudio.
Geotechnical Engineering in the Digital and Technological Innovation Era. ed. / Alessio Ferrari; Marco Rosone; Maurizio Ziccarelli; Guido Gottardi. Springer , 2023. p. 544-552 (Springer Series in Geomechanics and Geoengineering).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Finite element modelling of seismic performance of an excavation supported by propped diaphragm walls in a natural structured clay soil

AU - Oliynyk, Kateryna

AU - Ferraro, Giulia

AU - Tamagnini, Claudio

PY - 2023/6/17

Y1 - 2023/6/17

N2 - A series of non-linear FE simulations of the behavior of excavations in natural structured clays supported by diaphragm walls under seismic loading conditions has been performed to investigate the effects of the initial degree of structure and of the destructuration rate on the performance of the structure, quantified in terms of permanent displacements and rotations of the walls. In order to reproduce the main characteristics of the cyclic/dynamic soil response at very small to medium-large strain levels, a recently proposed hypoplastic model for clay has been used to describe the soil behavior. In the model, an additional scalar state variable (sensitivity s) allows to incorporate the effects of soil structure. The results show that, while destructuration effects are almost negligible during the static excavation stage, the progressive degradation induced by the earthquake shaking may induce a significant increase in the accumulated permanent displacements, mostly controlled by the destructuration rate of the material.

AB - A series of non-linear FE simulations of the behavior of excavations in natural structured clays supported by diaphragm walls under seismic loading conditions has been performed to investigate the effects of the initial degree of structure and of the destructuration rate on the performance of the structure, quantified in terms of permanent displacements and rotations of the walls. In order to reproduce the main characteristics of the cyclic/dynamic soil response at very small to medium-large strain levels, a recently proposed hypoplastic model for clay has been used to describe the soil behavior. In the model, an additional scalar state variable (sensitivity s) allows to incorporate the effects of soil structure. The results show that, while destructuration effects are almost negligible during the static excavation stage, the progressive degradation induced by the earthquake shaking may induce a significant increase in the accumulated permanent displacements, mostly controlled by the destructuration rate of the material.

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ER -

Oliynyk K, Ferraro G, Tamagnini C. Finite element modelling of seismic performance of an excavation supported by propped diaphragm walls in a natural structured clay soil. In Ferrari A, Rosone M, Ziccarelli M, Gottardi G, editors, Geotechnical Engineering in the Digital and Technological Innovation Era. Springer . 2023. p. 544-552. (Springer Series in Geomechanics and Geoengineering). doi: 10.1007/978-3-031-34761-0_66

Finite element modelling of seismic performance of an excavation supported by propped diaphragm walls in a natural structured clay soil

Abstract

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Keywords

ASJC Scopus subject areas

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