Experimental and analytical study of the structural response of segmental tunnel linings based on an in situ loading test. Part 2: Numerical simulation

Arnau, Oriol; Molins, Climent

doi:10.1016/j.tust.2011.04.005

Cited by 118 publications

(38 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Concrete segmental linings, which are continuously placed side-by-side as tunnel boring machine (TBM) advances, are commonly used in shield-driven tunnels. One of the most important factors in designing a segmental tunnel lining is the influence of longitudinal joints on structural overall behavior [25,4,12,14,24,2,3,21,22,23,8]. During the tunnel operation, the structural behavior of concrete segmental linings may be further influenced by external factors, such as nearby deep excavations, a new cross-over tunnel, differential settlement in soft ground, and unexpected loading at the ground surface [20,1,11].…”

Section: Introductionmentioning

confidence: 99%

A progressive model to simulate the full mechanical behavior of concrete segmental lining longitudinal joints

Yan

Wang

Zhu

2015

Engineering Structures

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

A progressive model to simulate the full mechanical behavior of concrete segmental lining longitudinal joints

Yan

Wang

Zhu

2015

Engineering Structures

View full text Add to dashboard Cite

“…So far, this is probably one of the most studied TBM-bored tunnels and this is still under construction. In this sense, experimental and numerical analysis related with the FRC were extensively performed [34][35][36][37]. Likewise, particular numerical studies concerning the concentrated load induced by the jacks were also developed to explain some of the cracks observed during the construction of the tunnel [38].…”

Section: Metro L9 Of Barcelonamentioning

confidence: 99%

Design of FRC tunnel segments considering the ductility requirements of the Model Code 2010

Fuente

Cavalaro

et al. 2015

Tunnelling and Underground Space Technology

View full text Add to dashboard Cite

Fibre reinforced concrete (FRC) is used to improve the mechanical response of precast segments for tunnels. The structural use of the material has been regulated by national codes and, recently, by the Model Code 2010 (MC 2010, hereinafter). In this regard, it is necessary to update the philosophy applied to the design of tunnel segments in compliance with the most recent guidelines, evaluating their applicability and repercussion. The objective of this paper is to present a critical analysis of the design of FRC segments according to the ductility requirements from the MC 2010; an alternative approach is proposed that is compatible with the condition found in some tunnels. The repercussions of both approaches are evaluated for the Metro Line 9 from Barcelona using results obtained in an experimental program with full-scale segments. The study suggests that the alternative approach may be applied under certain conditions, leading to a reduction in the fibre consumption. Keywords: Barcelona Metro Line, Cracking bending moment, design, ductility, FRC, precast segments.Tunnelling and Underground Space Technology 2 INTRODUCTIONFibre reinforced concrete (FRC) is a composite material used to improve the mechanical response of precast segments for tunnels [1][2][3][4], enhancing their ductility and fire resistance as well as their mechanical performance during transient load stages. Due to these advantages, the use of structural fibres contributes to the replacement of traditional passive reinforcement, accelerating the production process and increasing the competitiveness of the FRC. Proof of this are the numerous experiences in which precast FRC segments have been used in highway (RT), railway (RWT), metro (MT), water supply (WTT), gas transport (GPT) and service (ST) tunnels. Table 1 [4][5][6] summarizes some of the main applications already in service or under construction.The structural use of fibres has been regulated by the national codes in Germany in 1992 [7], Italy in 2006 [8] and Spain in 2008 [9], for instance. More recently, recommendations about the design of FRC structures were also included in the MC 2010 [10], with constitutive equations [11][12] and models for the Service Limit State and Ultimate Limit State (SLS and the ULS, respectively). An increase in the use of FRC in tunnels segments has been observed as a result of that [13]. In this regard, it is necessary to update the philosophy applied to the design of tunnel segments in compliance with the particular requirements proposed in the MC 2010, evaluating its applicability and repercussions.The objective of this paper is to present a critical analysis of the design of FRC segments according to the ductility requirements from the MC 2010 and to propose an alternative approach more compatible with the conditions found in practice. First, the design procedure from the MC 2010 is analysed and adapted to FRC segmented linings. Then, the alternative approach is presented. The applicability and repercussion of both approaches in terms of fibre ...

show abstract

“…The ground structure interaction is considered by means of three different sets of spring elements placed in radial, tangential and longitudinal directions (Blomet al, 1999;Plizzari and Tiberti, 2006;Arnau and Molins, 2011). Unilateral response is adopted in radial springs in order to avoid tensile forces between the ground and the structure.…”

Section: Ground-structure Interactionmentioning

confidence: 99%

Theoretical and numerical analysis of the three-dimensional response of segmental tunnel linings subjected to localized loads

Arnau

Molins

2015

Tunnelling and Underground Space Technology

Self Cite

View full text Add to dashboard Cite

Segmental tunnel linings present a significant 3D response when they are subjected to localized loads or to other scenarios that produce different deformations of adjacent rings. The present paper analyzes the interaction mechanisms mobilized in such conditions, determining the most influence parameters and their repercussion on the structural response of the lining. A complete set of numerical analyses is carried out on a complex 3D numerical model that accurately reproduces a real tunnel section on multiple scenarios. Numerical results show the structural benefits of the lining three-dimensional response when subjected to localized loads, allowing the determination of the influence presented by the main involved parameters. The surrounding ground stiffness determines the interaction degree achievable between adjacent rings, whilst lining longitudinal compression determines the maximum load for which a complete interaction is produced.

show abstract

Experimental and analytical study of the structural response of segmental tunnel linings based on an in situ loading test. Part 2: Numerical simulation

Cited by 118 publications

References 16 publications

A progressive model to simulate the full mechanical behavior of concrete segmental lining longitudinal joints

A progressive model to simulate the full mechanical behavior of concrete segmental lining longitudinal joints

Design of FRC tunnel segments considering the ductility requirements of the Model Code 2010

Theoretical and numerical analysis of the three-dimensional response of segmental tunnel linings subjected to localized loads

Contact Info

Product

Resources

About