Numerical-aided design of fiber reinforced concrete tunnel segment joints subjected to seismic loads

Avanaki, Mohammad Jamshidi; Hoseini, Abdollah; Vahdani, Shahram; Fuente, Albert de la

doi:10.1016/j.conbuildmat.2018.02.219

Cited by 39 publications

(6 citation statements)

References 37 publications

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“…13 Jamshidi et al established a 3D numerical model to simulate a full-scale test, the numerical results agreed well with the experimental data, but the joint surface was simple in the numerical model and the test. 14 Feng et al simulated full-scale tests with a 3D numerical model, and the obtained calculation results agreed well with test results, the bolts in the model were simulated by beam elements, and the contact between the bolts and segments was not considered. 9 Previous studies indicate that it is feasible to investigate the compression-bending mechanical properties of segmental joints via numerical simulation.…”

Section: Introductionmentioning

confidence: 68%

“…Majdi et al analyzed the forces and deformation of a segmental joint under positive and negative moments using a 3D numerical model, in which the connected bolt was straight 13 . Jamshidi et al established a 3D numerical model to simulate a full‐scale test, the numerical results agreed well with the experimental data, but the joint surface was simple in the numerical model and the test 14 . Feng et al simulated full‐scale tests with a 3D numerical model, and the obtained calculation results agreed well with test results, the bolts in the model were simulated by beam elements, and the contact between the bolts and segments was not considered 9 .…”

Section: Introductionmentioning

confidence: 99%

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Refined three‐dimensional numerical model for segmental joint and its application

Zhang

Feng

et al. 2020

Structural Concrete

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Previous research of segmental joints are mainly based on experimental and theoretical methods; few studies have focused on refined numerical model. Therefore, a refined numerical model is established in which eight‐node solid element and three‐dimensional beam element are adopted to simulate joint structures and reinforcement, respectively, and bolt preload is considered. Then, the numerical model is verified with full‐scale tests and applied to analyze the influence of joint deformation and bolt preload. It is confirmed that (a) the numerical model can reproduce joint deformation process with good accuracy; (b) bolt stress are controlled by tensile action caused by joint opening and bending action caused by joint vertical displacement; (c) the changes of joint deformation with bending moment can be divided into three stages; bolt preload has no effect on the change of joint deformation with bending moment but has significant impact on the value of joint deformation in each stage.

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Section: Introductionmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Refined three‐dimensional numerical model for segmental joint and its application

Zhang

Feng

et al. 2020

Structural Concrete

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“…rough shaking table test, it is found that polypropylene fiber concrete as lining can reduce the stress and strain of a tunnel under earthquake action [10]. Steel fiber reinforced concrete has better antiseismic performance than ordinary reinforced concrete [11,12]. Although there are many research studies on fiber reinforced concrete, the application of fiber reinforced concrete in engineering is less, and its antiseismic effect in specific projects is not clear, so further research is needed.…”

Section: Introductionmentioning

confidence: 99%

Study on Antiseismic Effect of Different Thicknesses of Shock Absorption Layer on Urban Shallow Buried Double Arch Rectangular Tunnel

Wang

et al. 2022

Shock and Vibration

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With the development of urban tunnels, more and more studies focus on the antiseismic design of tunnels. Setting up a shock absorption layer is a very effective means in the earthquake resistance of an urban tunnel. In this paper, in order to study the influence of the thickness of a shock absorption layer on the antiseismic effect of the urban shallow buried double arch rectangular tunnel, the Tengzhou–Fenghuang tunnel is used as the research background. Firstly, the model is established by finite element software to analyze the tunnel with 50 mm, 100 mm, and 150 mm thick shock absorption layers, and analyze the tunnel displacement, stress, and safety factors of different models under the action of a seismic wave. Finally, the calculation results are compared and analyzed with those of the model without the shock absorption layer to summarize the thickness of the shock absorption layer suitable for urban shallow buried rectangular tunnels. The results show that the displacement and stress of tunnel lining are significantly reduced, and the safety factor is significantly improved after setting the shock absorption layer. Among them, the tunnel with a 100 mm thick shock absorption layer has the greatest reduction in principal stresses, the greatest increase in safety factor, and the best antiseismic effect, while the construction costs are not high. It is recommended that the urban shallow buried double arch rectangular tunnel be constructed with a 100 mm thick shock absorption layer.

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“…FRC production is particularly increasing in segmental linings for TBM‐constructed tunnels since FRC has been proven to enhance the mechanical behavior of the segments when these are subjected to both transient loading situations (handling, transport, and assembling) and service loads during operation phase, even for extreme load events such as earthquakes, fire or explosion . Besides, the damage reduction during the TBM jack thrust operation is of paramount importance due to the potential consequences of cracking for the infrastructure serviceability, especially in aggressive environments …”

Section: Introductionmentioning

confidence: 99%

Effects of hybrid steel fiber reinforced composites on structural performance of segmental linings subjected to TBM jacks

Avanaki

2019

Structural Concrete

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In recent years, incorporating fibers as the main reinforcement in segmental lined tunnels has gained significant interest. Damage to segmental linings due to the thrust force of TBM jacks is one of the main problems that arises in the assembly phase, reducing serviceability and durability of tunnels. The aim of this paper is to experimentally and numerically investigate the effects of fiber size, content, and hybridization on the performance of steel fiber reinforced concrete (SFRC) tunnel segments under TBM jack forces compared to conventionally reinforced concrete (RC) segments. In this regard, different scenarios of segment support conditions and eccentricity of the applied TBM jack loads are investigated in a particular real tunnel. The results showed that under various configurations of segment support and load eccentricity, SFRC composites show better performance over RC in both SLS and ULS conditions under TBM jack loads in terms of cracking strength and damage propagation.

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Numerical-aided design of fiber reinforced concrete tunnel segment joints subjected to seismic loads

Cited by 39 publications

References 37 publications

Refined three‐dimensional numerical model for segmental joint and its application

Refined three‐dimensional numerical model for segmental joint and its application

Study on Antiseismic Effect of Different Thicknesses of Shock Absorption Layer on Urban Shallow Buried Double Arch Rectangular Tunnel

Effects of hybrid steel fiber reinforced composites on structural performance of segmental linings subjected to TBM jacks

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