Behaviour of concrete confined by both steel spirals and fiber-reinforced polymer under axial load

Wei, Yang; Zhang, Xi; Wu, Gang; Zhou, Yongfeng

doi:10.1016/j.compstruct.2018.03.041

Cited by 73 publications

(30 citation statements)

References 42 publications

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“…However, the cause of tunnel damage is not easily identified due to various complex influencing factors [5,6]. In view of previous studies, tunnel structures are mainly suffered from harsh geological or topographical environments around the tunnel site [7][8][9], insufficient bearing capacity [10], unexpected external load [11,12], and degraded material properties [13,14]. Especially, the studies performed by authors have demonstrated that the construction deficiency of cavities around surrounding rocks can also induce landslides during tunneling as well as damages in tunnel lining [15,16], which are resulted from tunneling without timely backfilling.…”

Section: Introductionmentioning

confidence: 99%

Performance Investigation of Tunnel Lining with Cavities around Surrounding Rocks

Fang

Cheng

et al. 2020

Advances in Civil Engineering

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This paper presents a systematical numerical investigation into the lining performance of a tunnel with cavities around surrounding rocks, focusing on the influences of cavity size and multicavity distribution. The study demonstrates that the cavities around surrounding rocks have much influence on tunnel stability and may induce damages in tunnel structures, in which cavity width has a more severe effect on the stress state of tunnel structures than cavity depth. Moreover, the numerical investigation also illustrates that the nonadjacent distribution of multicavities has more serious influence on tunnel structures than that from adjacent distribution of multicavities as well as that from a single cavity.

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Section: Introductionmentioning

confidence: 99%

Performance Investigation of Tunnel Lining with Cavities around Surrounding Rocks

Fang

Cheng

et al. 2020

Advances in Civil Engineering

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“…The compared results are shown in Figure 7e,f, in which the error index AV values were 0.24 and 0.22 for ultimate strain and stress, respectively, and IAE values were 0.24 and 0.22 for ultimate strain and stress, respectively. The error indexes AV and IAE [2,9,[31][32][33] are defined in Equations (3) and (4), respectively. It can be seen that there is an error between the theoretical value and the experimental value.…”

Section: The Ultimate Conditionmentioning

confidence: 99%

Effect of Strain Rates on the Stress–Strain Behavior of FRP-Confined Pre-Damaged Concrete

et al. 2020

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There are many studies on fiber-reinforced polymer (FRP)-confined pre-damaged concrete under quasi-static strain rates. However, few studies have focused on FRP-confined pre-damaged concrete under high strain rates. Thus, an experimental and analytical investigation was conducted to obtain the mechanical behavior of FRP-confined pre-damaged concrete under different strain rates. The results show that the stress–strain curves, ultimate stress, and strain values were affected by strain rate and the extent of concrete damage. A stress–strain model of FRP-confined pre-damaged concrete considering the strain rate was developed by modifying a stress–strain model of FRP-confined pre-damaged concrete under quasi-static loading. The proposed model was evaluated by using test data. The evaluation results show that the proposed model can predict the stress–strain behavior of FRP-confined pre-damaged concrete under different strain rates.

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“…More recently, fiber-reinforced polymer (FRP) composites have been increasingly used in civil engineering because of their high strength-to-weight ratios, good design flexibility, and excellent corrosion resistance even under harsh environment [10][11][12][13][14][15][16][17][18][19][20][21][22]. In the 1990s, Mirmiran and Shahawy [23] proposed concrete-filled FRP tubular (CFFT) columns.…”

Section: Introductionmentioning

confidence: 99%

Compressive Behavior of Circular Sawdust-Reinforced Ice-Filled Flax FRP Tubular Short Columns

et al. 2020

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Sawdust-reinforced ice-filled flax fiber-reinforced polymer (FRP) tubular (SIFFT) columns are newly proposed to be used as structural components in cold areas. A SIFFT column is composed of an external flax FRP tube filled with sawdust-reinforced ice. The compressive behavior of circular SIFFT short columns was systematically investigated. Four types of short columns with circular sections, including three plain ice specimens, three sawdust-reinforced ice specimens (a mixture of 14% sawdust and 86% ice in weight), nine plain ice-filled flax FRP tubular (PIFFT) specimens and nine SIFFT specimens, were tested to assess the concept of the innovative composite columns. The test variables were the thickness of flax FRP tubes and the type of ice cores. The test results indicated that the lateral dilation and the development of cracks of the ice cores were effectively suppressed by outer flax FRP tubes, thus causing a considerable enhancement in the compressive strength. Moreover, the compressive behavior, energy-absorption capacity, and anti-melting property of sawdust-reinforced ice cores were better than those of plain ice cores confined by flax FRP tubes with the same thicknesses. The proposed equations for estimating ultimate bearing capacities of PIFFT and SIFFT short columns were shown to provide reasonable and accurate predictions.

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Behaviour of concrete confined by both steel spirals and fiber-reinforced polymer under axial load

Cited by 73 publications

References 42 publications

Performance Investigation of Tunnel Lining with Cavities around Surrounding Rocks

Performance Investigation of Tunnel Lining with Cavities around Surrounding Rocks

Effect of Strain Rates on the Stress–Strain Behavior of FRP-Confined Pre-Damaged Concrete

Compressive Behavior of Circular Sawdust-Reinforced Ice-Filled Flax FRP Tubular Short Columns

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