Experimental Study on One-Way BFRP Bar-Reinforced UHPC Slabs under Concentrated Load

Xu, Xiaoqing; Hou, Zhujian

doi:10.3390/ma13143077

Cited by 14 publications

(4 citation statements)

References 17 publications

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“…Basalt-FRP bars have recently gained popularity among the many types of FRP materials due to their improved mechanical qualities, environmental sustainability, and costeffectiveness [10][11][12][13][14][15][16].There are still challenges associated with the use of basalt-FRP bars as reinforcement in RC slabs, such as the lack of design guidelines. Therefore, further research is needed to investigate the punching shear behavior of two-way RC slabs reinforced with basalt-FRP bars and to update design guidelines for their safe and reliable use [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…In a 2020 study, Wang et al highlighted the enhanced post-cracking rigidity and energy efficiency found in basalt-FRP grid-reinforced slabs [11]. In the same year, Xu and Hou proposed using basalt-FRP bars in ultra-high performance concrete (UHPC) slabs, which displayed better ductility despite a lower ultimate capacity compared to steel-reinforced slabs [14]. Most recently, in 2022, Shill et al compared slabs reinforced with basalt-FRP, CFRP, and steel, finding that basalt-FRP-reinforced slabs exhibited superior ductility and a more gradual decrease in load capacity beyond the peak load [15].…”

Section: Introductionmentioning

confidence: 99%

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Two-Way Slab Punching Shear Resistance: Experimental Insights into Basalt-FRP Bar as Flexural Reinforcement

Salihi,

Hamad

2023

Sustainability

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This study seeks to experimentally evaluate the punching shear performance of two-way concrete slabs reinforced with conventional steel and basalt fiber-reinforced polymer (basalt-FRP) bars subjected to punching loading condition. Basalt-FRP bars offer high tensile strength and corrosion resistance but are understudied in two-way concrete slabs concerning punching shear. This study aims to fill this gap, with key implications for future structural design considerations. To achieve the objectives of the study, six large-scale square slabs were fabricated and subjected to a concentric load until failure. The parameters of the experiment included are the type of reinforcement used (either basalt-FRP or steel), the percentage of basalt-FRP used (ranging from 0.88% to 1.77%), the size of the basalt-FRP bars used (either 16 or 12 mm), and the concrete’s compressive strength (25, 30, and 35 MPa). The findings from the tests showed that incorporating basalt-FRP bars with one-quarter equivalent axial stiffness (ρ(Ef/Es)) to that of steel significantly enhanced the punching shear resistance of flat slabs, achieving approximately 65% of the capacity observed in steel-reinforced control sample. Moreover, increasing the amount of basalt-FRP bar reinforcement to half of the equivalent axial stiffness of steel had a substantial effect in improving shear strength, reaching approximately 89% of the capacity observed in the steel-reinforced specimen and concurrently reducing deflection during the failure. Additionally, the reinforcement type and concrete compressive strength played a crucial role in determining the ultimate load, failure modes, and crack propagation patterns. The study reveals discrepancies between experimental results and existing models for punching shear in FRP-reinforced slabs. Certain prevalent models prove to be conservative in their estimates, while others offer more accurate predictions, indicating the need for comprehensive model refinement. The investigation found that one model, encompassing the majority of variables affecting punching shear, exhibited the highest level of precision, with a slight adjustment recommended to enhance its accuracy further. This study suggests a sustainable, more durable way to reinforce concrete in bridges and high-rise buildings, potentially improving construction efficiency, enhanced service life, and potential updates to building codes.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Two-Way Slab Punching Shear Resistance: Experimental Insights into Basalt-FRP Bar as Flexural Reinforcement

Salihi,

Hamad

2023

Sustainability

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“…BFRP bars are not only used in beams, slabs, columns, and other common components [19][20][21] but are also used in the construction of concrete arch structures [22]. Tang et al [23,24] used BFRP bars instead of steel bars to make concrete arch members and found that the concrete arch with BFRP bars had comparable resistance to the concrete arch with steel bars, under air-explosion.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Responses of Blast-Loaded Shallow Buried Concrete Arches Strengthened with BFRP Bars

Jian-qin

Zhou

et al. 2022

Materials

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This paper proposes a prefabricated basalt fiber reinforced polymer (BFRP) bars reinforcement of a concrete arch structure with superior performance in the field of protection engineering. To study the anti-blast performance of the shallow-buried BFRP bars concrete arch (BBCA), a multi-parameter comparative analysis was conducted employing the LS-DYNA numerical method, which was verified by the results of the field explosion experiments. By analyzing the pressure, displacement, acceleration of the arch, and the strain of the BFRP bars, the dynamic response of the arch was obtained. This study showed that BFRP bars could significantly optimize the dynamic responses of blast-loaded concrete arches. The damage of exploded BBCA was divided into five levels: no damage, slight damage, obvious damage, severe damage, and collapse. BFRP bars could effectively mitigate the degree of damage of shallow-buried underground protective arch structures under the explosive loads. According to the research results, it was feasible for BFRP bars to be used in the construction of shallow buried concrete protective arch structures, especially in the coastal environments.

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“…In terms of new structures, researchers have proposed numerous forms of FRP-UHPC composite members. For example, UHPC beams reinforced with FRP bars [35][36][37][38], one-way BFRP bar-reinforced UHPC slabs [39], FRP fabrics reinforced UHPC panels [40], UHPC composite plates reinforced with FRP grids [41], lightweight UHPC-FRP composite decks [42], FRP bars reinforced seawater sea-sand concrete beams with a prefabricated UHPC shell [43], seawater sea-sand coral concrete-UHPC composite beams reinforced with BFRP bars [44], and so on.…”

Section: Introductionmentioning

confidence: 99%

I-shaped ECC/UHPC composite beams reinforced with steel bars and BFRP sheets

Dong¹,

Ji²,

Liu³

et al. 2022

Sustain. Struct.

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This paper proposes a new type of small-sized I-shaped engineered cementitious composite (ECC)/ ultra-high performance concrete (UHPC) composite beam which has the potential to be suitable for corrosive environments. The lower tensile part of the beam was made of ECC material (2/3 of the height), and the top compressive part was made of UHPC material (1/3 of the height). Inner embedded steel bars and surface-bonded basalt fiber reinforced polymer (BFRP) sheets were adopted as the reinforcing materials in combination. A total of nine I-shaped beams were designed and tested under four-point bending test. The influence of parameters such as the ratio of the embedded tensile steel bars, the top UHPC flange, and the surface bonded tensile BFRP sheet on the behavior of the beams was investigated. The results showed that the I-shaped ECC/UHPC composite beams have excellent comprehensive performance, and thanks to the ultra-high durability of the component materials, they have ultra-high durability that ordinary I-steel beams do not have and thus have broad application prospects in corrosive environments. The shear resistance capacity of the thin-walled ECC web needs to be further improved, and UHPC is recommended for the web in the follow-up study.

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Experimental Study on One-Way BFRP Bar-Reinforced UHPC Slabs under Concentrated Load

Cited by 14 publications

References 17 publications

Two-Way Slab Punching Shear Resistance: Experimental Insights into Basalt-FRP Bar as Flexural Reinforcement

Two-Way Slab Punching Shear Resistance: Experimental Insights into Basalt-FRP Bar as Flexural Reinforcement

Dynamic Responses of Blast-Loaded Shallow Buried Concrete Arches Strengthened with BFRP Bars

I-shaped ECC/UHPC composite beams reinforced with steel bars and BFRP sheets

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