3D modelling of concrete tunnel segmental joints and the development of a new bolt-spring model

Wang, Fei; Huang, Hongwei; Soga, Kenichi; Li, Zili

3D modelling of concrete tunnel segmental joints and the development of a new bolt-spring model

dc.contributor.author	Wang, Fei
dc.contributor.author	Huang, Hongwei
dc.contributor.author	Soga, Kenichi
dc.contributor.author	Li, Zili
dc.contributor.funder	National Natural Science Foundation of China	en
dc.date.accessioned	2021-02-16T10:19:32Z
dc.date.available	2021-02-16T10:19:32Z
dc.date.issued	2021-01-21
dc.date.updated	2021-02-16T09:56:37Z
dc.description.abstract	In a segmental metro tunnel, it is widely observed that cracks, water leakage and other structural defects usually appear at segmental joint section of a smaller stiffness than main tunnel segment section. In this study, a 3D finite element analysis was conducted to simulate a typical concrete segmental joint explicitly using 3D continuum elements, and the performance of 3D continuum model was validated against laboratory tests available in literature. Since such continuum model may cost excessive computational time when a large-scale tunnel structure is analysed, a new bolt-spring model was developed to simplify the structural features of concrete segmental joint. In the bolt-spring model, the interaction between bolt and segment was modelled by a set of normal springs and shear springs: the stiffness of the normal springs is mainly determined by the bolt itself, whilst the shear springs take account of bolt-segment friction, interaction and shear resistance of the bolt. In the meanwhile, the interaction between two adjoining tunnel segments is explicitly modelled using contact elements. The proposed bolt-spring model is able to simulate the details of joint deformation and contact pressure between segments more realistically than previously available by conventional methods (e.g. continuous ring, beam-spring model (BSM)), where segment-segment interaction is not explicated modelled. Compared to the continuum model, the bolt-spring model saves up to 90% computational time without compromising numerical accuracy. Furthermore, this paper compared the mechanical behaviour of a concrete joint against that of a cast-iron one with particular emphasis on the development of different bolt-spring models.	en
dc.description.sponsorship	National Natural Science Foundation of China (No. 5150080691; No. 51708564; No. 51608539)	en
dc.description.status	Peer reviewed	en
dc.description.version	Accepted Version	en
dc.format.mimetype	application/pdf	en
dc.identifier.articleid	103835	en
dc.identifier.citation	Wang, F., Huang, H., Soga, K. and Li, Z. (2021) '3D modelling of concrete tunnel segmental joints and the development of a new bolt-spring model', Tunnelling and Underground Space Technology, 110, 103835 (15pp). doi: 10.1016/j.tust.2021.103835	en
dc.identifier.doi	10.1016/j.tust.2021.103835	en
dc.identifier.endpage	15	en
dc.identifier.issn	0886-7798
dc.identifier.journaltitle	Tunnelling and Underground Space Technology	en
dc.identifier.startpage	1	en
dc.identifier.uri	https://hdl.handle.net/10468/11067
dc.identifier.volume	110	en
dc.language.iso	en	en
dc.publisher	Elsevier Ltd.	en
dc.rights	© 2021, Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC BY-NC-ND 4.0 license.	en
dc.rights.uri	https://creativecommons.org/licenses/by-nc-nd/4.0/	en
dc.subject	3D continuum model	en
dc.subject	Bolt-spring model	en
dc.subject	Computational cost	en
dc.subject	Concrete segmental joint	en
dc.subject	Joint distortion	en
dc.title	3D modelling of concrete tunnel segmental joints and the development of a new bolt-spring model	en
dc.type	Article (peer-reviewed)	en