Experimental and numerical-based design of hybrid steel fibre-reinforced concrete tunnels

Avanaki, Mohammad Jamshidi; Abedi, Mohammad; Hoseini, Abdollah

doi:10.1680/jmacr.18.00279

Cited by 6 publications

(5 citation statements)

References 22 publications

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“…Moreover, the high-performance concrete has been gradually applied as shotcrete in building the tunnel lining for enhancing the tunnel performance in recent years [14][15][16]. The fiber-reinforced concrete (FRC) is adopted in tunnel lining for increasing the stability and bearing capacity of surrounding rocks [17][18][19], the functional cementitious composite (FCC) and fiberreinforced plastics (FRP) are utilized to increase the deformation ability and damage tolerance of lining structure [20][21][22], and steel plate is used for resisting the explosion impact on tunnel lining [23]. This application of the high-performance materials provides the opportunity of developing new-type lining structure without the shortages in the aforementioned composite lining structure, in which the single-layer tunnel lining using shotcrete is developed for supporting the tunnel construction [15].…”

Section: Introductionmentioning

confidence: 99%

Performance of Single-Layer Lining Using Shotcrete and Reinforcement Ribs Employed for Supporting Large-Span Tunnel

Li,

Diao,

et al. 2023

Materials

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Single-layer tunnel lining using shotcrete has the significant advantages of reducing the tunnel excavation volume and saving construction materials, which has been gradually applied in tunnel construction. The high-performance concretes are generally adopted in single-layer tunnel lining for enhancing the bearing capacity of the tunnel lining, whereas the single-layer tunnel lining may still induce damages due to the adverse conditions such as shallow buried depth of the tunnel, and further study related to its application condition is thus required. This paper presents a study of the single-layer tunnel lining with shotcrete employed for supporting the large-span tunnel, in which the reinforcement ribs are also adopted in the single-layer lining for improving the lining stiffness and strength. The study is implemented using numerical simulation, focusing on the safety and performance variation of the single-layer tunnel lining influenced from the varied lining thicknesses and shallow buried depths of the tunnel. The results shows that the single-layer tunnel lining has the obvious advantage of toughness in significantly absorbing large deformation of surrounding rocks and improving the ability to resist lining cracking. The results also demonstrate that the single-layer tunnel lining with shotcrete and reinforcement ribs can safely support the large-span tunnel, in which the stability and safety of the large-span tunnel are confirmed from both the tunnel deformation and lining stresses. Moreover, the factors related to both the lining thickness and shallow buried depth of the tunnel have great influence on the single-layer tunnel lining with shotcrete and reinforcement ribs, in which the insufficient lining thickness and excessive shallow buried depth of the tunnel can induce the damages of the single-layer tunnel lining due to shotcrete stresses exceeding its strength. This study provides some references of employing the single-layer tunnel lining with shotcrete and reinforcement ribs for supporting large-span tunnel.

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Section: Introductionmentioning

confidence: 99%

Performance of Single-Layer Lining Using Shotcrete and Reinforcement Ribs Employed for Supporting Large-Span Tunnel

Li,

Diao,

et al. 2023

Materials

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“…Steel FRC (SFRC) segments, has been investigated in various research efforts [12][13][14] and practiced in numerous projects worldwide [14]. It has been shown that fibers improve both structural [15][16][17] and durability [18] of the segmental tunnel. Studies on the performance of FRC tunnels are mainly focused on loading conditions normally experienced from the tunnel assembly phase (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies on hybrid composites were mainly focused on cement paste or mortar. However, research on developing exact proportions and methods for combining various fibers to produce and maximize synergistic response is on the agenda [17,23,24].…”

Section: Introductionmentioning

confidence: 99%

Stress-Strain Constitutive Material Models for Hybrid Steel Fiber Reinforced Concrete

Avanaki¹,

Abedi²,

Hoseini³

2020

J. Civ. Eng. Constr.

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Recent advancements in fiber reinforced concrete (FRC) technology has led to the development of fibrous concrete composites, comprised of fibers with different material and/or geometry, commonly known as hybrid FRC. In one type of hybrid FRC composites, advantageous behaviors of fibers of the same material but with different geometries are gathered in a single FRC mix. The aim of this paper is to develop and validate stress-strain relationships for hybrid steel FRC composites. Six different steel FRC mixes are produced and characterization tests are conducted. Cube, cylindrical and beam specimens are produced for each characterization test corresponding to each of the Steel FRC (SFRC) composites. In this regard, an experimental program is performed to determine the basic engineering properties of SFRC composites using standard compressive, splitting tensile and three-point bending tests. The prescribed procedure of the RILEM guideline, originally developed for non-hybrid FRC, is followed using the obtained experimental results to develop stress-strain behavior models for the SFRC mixes. To validate results for the hybrid SFRC composites, numerical simulations of the 3-point bending tests were performed and compared to that of corresponding experimental results. The results indicated that the proposed stress-strain relationships yield acceptable results for characterizing the behavior of hybrid SFRC composites.

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“…The idea to use fibers as the main reinforcement mechanism in replacement of reinforcing bars in concrete segmental tunnels has been investigated in various research efforts [7][8][9] and practiced in numerous projects worldwide [9]. It has been shown that fibers improve both structural [10][11][12] and durability [13] of the segmental tunnel. Studies on the performance of FRC tunnels are mainly focused on loading conditions normally experienced from the tunnel assembly phase (e.g.…”

mentioning

confidence: 99%

“…They initially conducted an experimental program to characterize various SFRC composites and obtain their mechanical properties. A macro and micro steel fiber was used to produce both hybrid [12,19,20] and non-hybrid SFRC mixes. The mechanical properties of the SFRC composites to develop a soil-tunnel finite element model.…”

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confidence: 99%

Fiber Reinforced Concrete Segmental Tunnels in Seismic Regions

Avanaki

2019

CERJ

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The ever-growing construction sector is considered as one of the main propellers of economy, especially in developing countries. Tunnels are one of the vastly developed infrastructures in which public and private sectors build and invest for various purposes, e.g. transport, water supply, and so on. In this regard, approaches to increase feasibility and performance of tunnels are developed to meet specific requirements. Introduction and usage of fibrous materials to strengthen mortar matrix, i.e. primarily decrease crack development and propagation, dates back to centuries ago [1]. In modern construction practice, fibers of different materials (steel, carbon, glass, polypropylene, …) are used to increase the post-crack tensile strength and flexural properties of the concrete mortar [1-3], known as Fiber Reinforced Concrete (FRC). The design framework for fiber reinforced concrete structural elements are standardized and introduced in recent design codes and regulations [4][5][6].

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Experimental and numerical-based design of hybrid steel fibre-reinforced concrete tunnels

Cited by 6 publications

References 22 publications

Performance of Single-Layer Lining Using Shotcrete and Reinforcement Ribs Employed for Supporting Large-Span Tunnel

Performance of Single-Layer Lining Using Shotcrete and Reinforcement Ribs Employed for Supporting Large-Span Tunnel

Stress-Strain Constitutive Material Models for Hybrid Steel Fiber Reinforced Concrete

Fiber Reinforced Concrete Segmental Tunnels in Seismic Regions

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