Study on the lap-splice behavior of post-yield deformed steel bars in ultra high performance concrete

Ma, Fei; Deng, Mingke; Fan, Hongkan; Yang, Yong; Sun, Hongzhe

doi:10.1016/j.conbuildmat.2020.120611

Cited by 31 publications

(13 citation statements)

References 16 publications

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“…This shows that the bond strength is reduced when the reinforcement yields [52]. When the rebar yields, the Poisson effect induces a radial contraction of the rebar, reducing the external pressure surrounding the rebar and causing a reduction in the bond strength [53]. However, with the yield strength of 680 MPa steel bars compared to 422 MPa steel bars, the post-peak toughness of A 80 and A 50 was 17.8% and 18.0% lower, respectively.…”

Section: Rebar Yield Strengthmentioning

confidence: 93%

Experimental and Analytical Investigation of Bond Behavior of Deformed Steel Bar and Ultra-High Performance Concrete

Liang

Yuan

2022

Buildings

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Ultra-high performance concrete (UHPC) has been demonstrated to be a realistic alternative to less maintenance and significantly longer service life due to its better mechanical properties and low permeability. The bond performance of the deformed steel bar embedded in UHPC is critically important for the safety of the UHPC structures. This paper conducted an experimental investigation on the bond behavior of deformed steel bars and UHPC. The impacts of loading method, UHPC strength, steel fiber type and content, rebar diameter, and cover thickness were studied. The testing results revealed that the specimens failed in three modes: pull-out, splitting + pull-out, and cone failure. The main factors affecting the bond strength are UHPC compressive strength, cover thickness, and fiber characteristics. The peak slip of rebar-UHPC increases with cover thickness and rebar diameter. Finally, an analytical model of the bond stress-slip relationship between the UHPC and deformed steel bar is obtained, which is in suitable agreement with the test results.

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Section: Rebar Yield Strengthmentioning

confidence: 93%

Experimental and Analytical Investigation of Bond Behavior of Deformed Steel Bar and Ultra-High Performance Concrete

Liang

Yuan

2022

Buildings

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“…The composition of bond stress is very complex. To simplify the calculation of bond stress, some scholars [4][5][6][7][8] use the concept of average bond stress to describe the bond strength between deformed rebar and concrete. When the bond length is short, it can be assumed that the bond stress is evenly distributed in the bond section.…”

Section: Definition Of Bond Stressmentioning

confidence: 99%

A Review of the Bond Behavior between Concrete and Deformed Rebar

Fan

2022

JERR

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As a composite structure, the most important performance of the reinforced concrete structure is the bond behavior between them. Good bond behavior is the key to ensuring the service performance of reinforced concrete structures, which affects the performance of the structure at various stages in its life cycle. However, in the actual structural analysis, it is generally believed that the two do not produce relative slips, resulting in some differences between the analyzed structure and the actual engineering situation. At present, many scholars all over the world have used different test methods, comprehensively considered various factors affecting the bond behavior between deformed rebar and concrete, and obtained many conclusions. In this paper, based on the relevant research results of many scholars, starting from the bond mechanism, the experimental research method of the bond behavior, and the influencing factors of the bond behavior, a detailed review of the research status of the bonding performance of reinforced concrete is carried out. It is hoped that it can provide a reference to scholars that will study the bond behavior of reinforced concrete in the future.

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“…High‐performance poly(vinyl alcohol) (PVA) fibers have a high elastic modulus and tensile strength, making them potentially high‐performance fiber materials. Combined with concrete, it does not experience the same shrinkage and corrosion resistance concerns as steel reinforcement 1–9 . Additionally, the PVA fiber exhibits excellent cement affinity, alkali resistance, and weather resistance 10,11 .…”

Section: Introductionmentioning

confidence: 99%

Preparation of high‐strength, high‐modulus PVA fiber by synthesis of syndiotacticity‐rich high molecular weight PVA polymers with VAc and VBz via emulsifier‐free emulsion polymerization

Wang

Zou

et al. 2023

Polymers for Advanced Techs

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Different vinyl acetate (VAc) and vinyl benzoate (VBz) monomer ratios have been chosen as monomers to create high polymerization degree (Pn) and high syndiotacticity‐diad content (S‐diad) poly(vinyl alcohol) (PVA) polymers via emulsifier‐free polymerization in order to address the problem of limited mechanical capabilities of PVA fibers prepared with low Pn and low S‐diad polymer. The variations in hydrogen bonding, Pn, S‐diad, and viscosity of different PVA polymers were investigated and evaluated using Fourier transform infrared spectroscopy, proton nuclear magnetic resonance, gel permeation chromatography, and a viscosity tester. Moreover, various PVA fibers with high strength and modulus have been manufactured using a synthetic polymer as the raw material for dry‐wet spinning. The effect of Pn and S‐diad on the mechanical and thermal characteristics of PVA fibers is evaluated using a variety of characterization techniques, such as the scanning electron microscope, differential scanning calorimetry, thermogravimetric analyzer, X‐ray diffraction, and tensile tester. As the ratio of VBz monomer increased, the results suggested that VBz may have a considerable impact on the Pn and S‐diad of PVA polymers, the OH vibration absorption peak reduced from 3491 to 3442 cm−1; the Pn increased from 2112 to 17,704; and the S‐diad rose from 51.2% to 60.1%. In addition to the fact that Pn and S‐diad significantly increased the fibers' strength and modulus, the crystallinity increased from 41.8% to 51.7%, and the orientation degree rose from 87.5% to 91.7%, as Pn and S‐diad increased; the tensile strength and highest elastic modulus increased from 9.71 ± 0.3 cN/dtex to 12.74 ± 0.5 cN/dtex (increased of 31.2%) and 264.52 ± 9.3 cN/dtex to 338.41 ± 8.6 cN/dtex (increased of 27.9%); the elongation at break decreased from 5.63 ± 0.3% to 2.92 ± 0.2%.

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Study on the lap-splice behavior of post-yield deformed steel bars in ultra high performance concrete

Cited by 31 publications

References 16 publications

Experimental and Analytical Investigation of Bond Behavior of Deformed Steel Bar and Ultra-High Performance Concrete

Experimental and Analytical Investigation of Bond Behavior of Deformed Steel Bar and Ultra-High Performance Concrete

A Review of the Bond Behavior between Concrete and Deformed Rebar

Preparation of high‐strength, high‐modulus PVA fiber by synthesis of syndiotacticity‐rich high molecular weight PVA polymers with VAc and VBz via emulsifier‐free emulsion polymerization

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