Finite Element Analysis of Static Loading on Urban Tunnels

Zaid, Mohammad; Mishra, Swapnil; Rao, K. Seshagiri

doi:10.1007/978-981-15-6086-6_64

Cited by 23 publications

(5 citation statements)

References 13 publications

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“…The use of coherent units in XFEM simulations can lead to unreliable results due to the interface effects described by the coherent interface model [ 36 ]. These effects can cause oscillations in the results and reduce the accuracy of the simulation [ 37 ]. Furthermore, the use of cohesive elements with force correction has been shown to improve the accuracy of XFEM simulations with coherent units [ 38 ].…”

Section: Extended Finite Element Methods Xfemmentioning

confidence: 99%

Fracture Toughness and Fatigue Crack Growth Analyses on a Biomedical Ti-27Nb Alloy under Constant Amplitude Loading Using Extended Finite Element Modelling

Abdellah

Alharthi

2023

Materials

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The human body normally uses alternative materials such as implants to replace injured or damaged bone. Fatigue fracture is a common and serious type of damage in implant materials. Therefore, a deep understanding and estimation or prediction of such loading modes, which are influenced by many factors, is of great importance and attractiveness. In this study, the fracture toughness of Ti-27Nb, a well-known implant titanium alloy biomaterial, was simulated using an advanced finite element subroutine. Furthermore, a robust direct cyclic finite element fatigue model based on a fatigue failure criterion derived from Paris’ law is used in conjunction with an advanced finite element model to estimate the initiation of fatigue crack growth in such materials under ambient conditions. The R-curve was fully predicted, yielding a minimum percent error of less than 2% for fracture toughness and less than 5% for fracture separation energy. This provides a valuable technique and data for fracture and fatigue performance of such bio-implant materials. Fatigue crack growth was predicted with a minimum percent difference of less than nine for compact tensile test standard specimens. The shape and mode of material behaviour have a significant effect on the Paris law constant. The fracture modes showed that the crack path is in two directions. The finite element direct cycle fatigue method was recommended to determine the fatigue crack growth of biomaterials.

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Section: Extended Finite Element Methods Xfemmentioning

confidence: 99%

Fracture Toughness and Fatigue Crack Growth Analyses on a Biomedical Ti-27Nb Alloy under Constant Amplitude Loading Using Extended Finite Element Modelling

Abdellah

Alharthi

2023

Materials

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“…Recently it is regarded as a common tool for modeling laboratory testing. Numerous studies have been realized on the use of the finite element method for tunneling [54][55][56][57][58][59][60]. Examples of the deformation analyses and design of external support system by FEM is given in Figures 2 and 3, respectively.…”

Section: Methodsmentioning

confidence: 99%

Introductory Chapter: Tunnel Engineering – Rock Load Estimation and Support Design Methods

Tosun¹

2022

Theory and Practice of Tunnel Engineering

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“…This paper examines the challenges faced during the station's construction, emphasizing the role of detailed geotechnical analysis, cutting-edge construction methods, and strategic soil stabilization techniques [2]. Central to the project's suc-cess was the application of grouting to reinforce the soil structure and mitigate settlement risks [3], alongside a bilateral roadway tunneling method that upheld structural integrity and minimized urban disturbance.…”

Section: Introductionmentioning

confidence: 99%

Integrating Geotechnical Engineering and Finite Element Analysis in Urban Tunnel Construction: Case Study of Zhongshan Road Station on Hohhot Metro Line 2

Wang

2024

Atlantis Highlights in Engineering

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The expansion of Metro Line 2 with the addition of Zhongshan Road Station in Hohhot presents a paradigm of urban engineering that merges infrastructure growth with the conservation of extant utility systems. This study examines the station's construction, located at a critical junction, which includes a novel straight-wall arch tunnel in close proximity to essential gas pipelines. The core of this paper explores the geotechnical challenges, the application of advanced construction techniques, and particularly the strategic use of grouting for soil stabilization. The employment of Midas GTS NX (2020) for finite element numerical simulation analysis facilitated a thorough investigation of soil dynamics and the interaction with gas pipelines, utilizing the Mohr-Coulomb model. This research also evaluates the impact of different grouting reinforcement approaches on pipeline settlement through a series of controlled simulations. The results demonstrate the significance of grouting methods and their scope in reducing pipeline settlement, where full-section grouting is most effective, but semi-section grouting within a 2.0 m range provides a viable, resource-efficient alternative. The findings of this study offer practical guidance for urban tunnel construction near sensitive infrastructure and emphasize adaptable grouting techniques to ensure the integrity of new and existing structures.

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Finite Element Analysis of Static Loading on Urban Tunnels

Cited by 23 publications

References 13 publications

Fracture Toughness and Fatigue Crack Growth Analyses on a Biomedical Ti-27Nb Alloy under Constant Amplitude Loading Using Extended Finite Element Modelling

Fracture Toughness and Fatigue Crack Growth Analyses on a Biomedical Ti-27Nb Alloy under Constant Amplitude Loading Using Extended Finite Element Modelling

Introductory Chapter: Tunnel Engineering – Rock Load Estimation and Support Design Methods

Integrating Geotechnical Engineering and Finite Element Analysis in Urban Tunnel Construction: Case Study of Zhongshan Road Station on Hohhot Metro Line 2

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