Study on the bond properties between steel bar and fiber reinforced concrete after high temperatures

Li, Xiaodong; Lu, Chengdong; Cui, Yifei; Zhou, Lichen

doi:10.1016/j.istruc.2023.02.005

Cited by 9 publications

(1 citation statement)

References 25 publications

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“…Zhou et al [11] found that the bond-slip response was influenced by the anchorage length and the ratio of the steel tube diameter to steel bar diameter, and the constitutive model of non-linear bond stress-slip was devised. Li et al [12] performed the central pull-out test on 40 specimens, and they investigated the bond-slip performance between steel bar and normal concrete (NC) and steel fiber-reinforced concrete (SFRC) at high temperature. Their results showed that as the temperature increased, the bond strength decreased.…”

Section: Introductionmentioning

confidence: 99%

Study of the Tensile and Bonding Properties between Cement-Based Grout Materials and High-Strength Bolts

et al. 2023

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This study investigated the tensile and bonding properties between cement-based grouting materials (CBGM) and high-strength bolts. The associated failure mechanism, load-slip curve, ultimate pull-out load and bond stress were also studied. The effects of anchorage length and square steel tube restraint on the bonding properties were explored on the basis of 24 specimens used in central pull-out testing, and a bond stress–slip constitutive relationship model between high-strength bolts and CBGM was proposed. The results indicate that with the increase in the anchorage length of high-strength bolts, the failure modes of specimens can be divided into three types: the fracture failure of high-strength bolt that occurred when the anchorage lengths ranged from 18 d to 31 d, the specimens that experienced splitting failure with the constraint of square steel tube when the anchorage length was less than 15 d and the high-strength bolt that experienced pull-out failure without the constraint of square steel tubes. When the high-strength bolt experiences tensile failure, the ultimate pull-out load remains constant and the bond stress decreases as the anchorage length of high-strength bolts increases. Due to the lateral constrained effect of the square steel tube, the CBGM embodies a three-dimensional stress state, which can delay the generation and development of internal cracks and enhance the bond strength. A calculation formula was proposed to determine the bond strength between high-strength bolt and CBGM, and a constitutive model of the bond stress–slip constitutive relationship was modeled.

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Section: Introductionmentioning

confidence: 99%

Study of the Tensile and Bonding Properties between Cement-Based Grout Materials and High-Strength Bolts

et al. 2023

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Bond‐slip behavior between polypropylene fiber concrete and corroded reinforcement

Liu,

Song,

Wang

et al. 2024

Structural Concrete

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In this paper, the bond‐slip behavior and bond‐slip constitutive model of corroded reinforcement embedded in polypropylene fiber‐reinforced concrete (PFRC) were investigated. The central pullout test was conducted for 36 specimens. The effects of the corrosion level of reinforcement and the volume fraction of polypropylene (PP) fibers in concrete on the damage mode and bond‐slip process between reinforcement and concrete were studied. Based on the experimental data, a modified bond‐slip constitutive model considering the corrosion level of reinforcement and the volume fraction of PP fibers in concrete was proposed, and the proposed modified bond‐slip constitutive model was used in finite element analysis. The results showed that the addition of PP fibers effectively improved the ultimate bond strength, peak slip and bond toughness of reinforcement and concrete. The enhancement of the bonding properties of the specimens by the PP fibers remained significant after the reinforcement was corroded. The proposed modified bond‐slip constitutive model agreed well with the experimental results. The validity of the proposed model was further verified by finite element analysis.

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Experimental and theoretical study on shear behavior of HRB600 reinforced concrete beams after high temperature exposure

Zhao,

Deng,

Zhang

et al. 2023

Construction and Building Materials

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Study on the bond properties between steel bar and fiber reinforced concrete after high temperatures

Cited by 9 publications

References 25 publications

Study of the Tensile and Bonding Properties between Cement-Based Grout Materials and High-Strength Bolts

Study of the Tensile and Bonding Properties between Cement-Based Grout Materials and High-Strength Bolts

Bond‐slip behavior between polypropylene fiber concrete and corroded reinforcement

Experimental and theoretical study on shear behavior of HRB600 reinforced concrete beams after high temperature exposure

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