Elastoplastic Analysis for Circular Tunnel Based on Modified Lade Criterion considering Strain Softening and Dilatancy

Modified Lade criterion can not only describe the strength properties of many kinds of rocks well but also has simple and practical parameters. Although the elastoplastic solution of circular tunnel has been extensively investigated, the method based on modified Lade criterion considering the effect...

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Autores principales:	Yansheng Deng, Jianxiu Wang, Baoping Zou
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi Limited 2021
Materias:	Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/2d64e8559a4547cfb8bd4f616309917e
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spelling	oai:doaj.org-article:2d64e8559a4547cfb8bd4f616309917e2021-11-08T02:36:11ZElastoplastic Analysis for Circular Tunnel Based on Modified Lade Criterion considering Strain Softening and Dilatancy1687-809410.1155/2021/4872558https://doaj.org/article/2d64e8559a4547cfb8bd4f616309917e2021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/4872558https://doaj.org/toc/1687-8094Modified Lade criterion can not only describe the strength properties of many kinds of rocks well but also has simple and practical parameters. Although the elastoplastic solution of circular tunnel has been extensively investigated, the method based on modified Lade criterion considering the effect of the intermediate principal stress, strain-softening behavior, and dilatancy has not yet been studied. In this paper, a new numerical procedure based on modified Lade criterion is proposed to calculate the elastoplastic solutions for surrounding rock of the circular tunnel. The comparisons of stress, displacement, and plastic zone radius are carried out between the presented method and published literatures under axisymmetric and nonaxisymmetric original in situ stress field. Finally, a series of parametric analyses are executed and discussed. It can be concluded that the lateral pressure coefficient, λ, influences both the size of plastic zone and the development direction. The plastic zone radius shows a negative power function change with increasing critical deviatoric plastic strain and increases slightly with increasing dilation angle, ψ.Yansheng DengJianxiu WangBaoping ZouHindawi LimitedarticleEngineering (General). Civil engineering (General)TA1-2040ENAdvances in Civil Engineering, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Engineering (General). Civil engineering (General) TA1-2040 Yansheng Deng Jianxiu Wang Baoping Zou Elastoplastic Analysis for Circular Tunnel Based on Modified Lade Criterion considering Strain Softening and Dilatancy
description	Modified Lade criterion can not only describe the strength properties of many kinds of rocks well but also has simple and practical parameters. Although the elastoplastic solution of circular tunnel has been extensively investigated, the method based on modified Lade criterion considering the effect of the intermediate principal stress, strain-softening behavior, and dilatancy has not yet been studied. In this paper, a new numerical procedure based on modified Lade criterion is proposed to calculate the elastoplastic solutions for surrounding rock of the circular tunnel. The comparisons of stress, displacement, and plastic zone radius are carried out between the presented method and published literatures under axisymmetric and nonaxisymmetric original in situ stress field. Finally, a series of parametric analyses are executed and discussed. It can be concluded that the lateral pressure coefficient, λ, influences both the size of plastic zone and the development direction. The plastic zone radius shows a negative power function change with increasing critical deviatoric plastic strain and increases slightly with increasing dilation angle, ψ.
format	article
author	Yansheng Deng Jianxiu Wang Baoping Zou
author_facet	Yansheng Deng Jianxiu Wang Baoping Zou
author_sort	Yansheng Deng
title	Elastoplastic Analysis for Circular Tunnel Based on Modified Lade Criterion considering Strain Softening and Dilatancy
title_short	Elastoplastic Analysis for Circular Tunnel Based on Modified Lade Criterion considering Strain Softening and Dilatancy
title_full	Elastoplastic Analysis for Circular Tunnel Based on Modified Lade Criterion considering Strain Softening and Dilatancy
title_fullStr	Elastoplastic Analysis for Circular Tunnel Based on Modified Lade Criterion considering Strain Softening and Dilatancy
title_full_unstemmed	Elastoplastic Analysis for Circular Tunnel Based on Modified Lade Criterion considering Strain Softening and Dilatancy
title_sort	elastoplastic analysis for circular tunnel based on modified lade criterion considering strain softening and dilatancy
publisher	Hindawi Limited
publishDate	2021
url	https://doaj.org/article/2d64e8559a4547cfb8bd4f616309917e
work_keys_str_mv	AT yanshengdeng elastoplasticanalysisforcirculartunnelbasedonmodifiedladecriterionconsideringstrainsofteninganddilatancy AT jianxiuwang elastoplasticanalysisforcirculartunnelbasedonmodifiedladecriterionconsideringstrainsofteninganddilatancy AT baopingzou elastoplasticanalysisforcirculartunnelbasedonmodifiedladecriterionconsideringstrainsofteninganddilatancy
_version_	1718443076636114944

Elastoplastic Analysis for Circular Tunnel Based on Modified Lade Criterion considering Strain Softening and Dilatancy

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