Seismic degradation behavior of steel-FRP composite bar reinforced concrete beams in marine environment based on experimental and numerical investigation

Su, Chang; Wang, Xin; Ding, Lining; Wu, Zhishen

doi:10.1016/j.compstruct.2023.116949

Cited by 12 publications

(3 citation statements)

References 26 publications

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“…The formula in ACI 440.1R-06 has been adopted as the reference for this paper, and the calculation formula of the bond strength, which is more effective and suitable for the consideration of environmental factors, is proposed according to the results of the discussion of the influence parameters above. See Equation (3), where K 1 is the influence coefficient of the surface of the bars. When the surface of the bars is ordinarily helically wrapped, K 1 is 1.0; when the surface is helically wrapped-sandblasted, K 1 is 1.8; when surface is helically wrapped-thread-wrapped, K 1 is 2.2; when surface is thread-wrapped, K 1 is 0.7; when surface is sandblasted, K 1 is 0.75.…”

Section: Bond Strength Modelmentioning

confidence: 99%

“…In the use of a reinforced concrete structure, concrete plays a certain role in protecting the steel bars, but due to the external temperature, it is not stable; moreover, corrosive media intrusion, the concrete cover being too small, and other reasons, result in the destruction of the surface protective film of the steel bars. As the corrosion of steel bars occurs, the mechanical properties decrease [1][2][3]. The main advantages of fiber-reinforced polymer (FRP) bars are their low density, light weight, ease of construction, and corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Study on the Bond Performance between Glass-Fiber-Reinforced Polymer (GFRP) Bars and Concrete

Wang,

Liu,

Miao

2023

Buildings

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By investigating the bond performance between glass-fiber-reinforced polymer (GFRP) bars and concrete, GFRP bars can be better applied to concrete structures as a building material. This paper considered the effects of three different GFRP bar surface treatments, three bonding lengths, corrosive solution, and immersion time on the bonding strength. The test results indicated that the bond strength decreases with the increase in the diameter and bond length. The bonding between GFRP bars and concrete can be improved by treating the surface of the bars in different ways. Compared with the control group, the bond strength of the specimens in the saline solution decreased by 1.3–21.4%, and the bond strength of the specimens in the alkaline solution decreased by 26.5–38.8%. In the corrosive environment, the bond properties are degraded. A bond strength calculation formula considering the surface treatment method of the GFRP bars was proposed. The prediction formula of the bond strength retention rate between the GFRP bar and concrete in the corrosive environment was established. The formula was validated with the available research data and the calculated values agreed well with the test values. The MBPE model and CMR model are modified to establish the bond-slip model of the GFRP bars and concrete in the corrosive environment. The model curve is close to the test curve. This paper provides a theoretical basis for future research on the bond-slip performance of GFRP bars and concrete.

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Section: Bond Strength Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Bond Performance between Glass-Fiber-Reinforced Polymer (GFRP) Bars and Concrete

Wang,

Liu,

Miao

2023

Buildings

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“…For the calculation of the SCS sandwich composite beams flexural resistance, the following assumptions were made; (1) The plane section remains plane; (2) the contribution of the concrete's tensile strength is disregarded; and (3) the concrete is capable of developing a full plastic rectangular stress block [41,42]. Based on a cross-sectional plasticity investigation, the plastic stress distribution of SCS is depicted in Figure 13.…”

Section: Flexural Behaviourmentioning

confidence: 99%

Behaviour of Steel-Concrete-Steel Sandwich Beams with Novel Enhanced C-Channels

Ayyadurai,

Shanmugam,

Ravindran

2023

Buildings

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As the load increases, most composite beams generally experience failure in both shear and flexural behavior. This outcome highlights the critical challenges of achieving sufficient strength and structural integrity in such beams. The proposed study has used the cold-formed behavior of an Enhanced C-channel (EC) shear connectors and Light Weight Concrete (LWC) to examine the new Steel-Lightweight Concrete-Steel sandwich Beams (SLCSB). The ECs have provided significant shear resistance at the faceplate-LWC interfacial interface and the tension separation resistance for faceplates (cold form steel) from the LWC core. Cold Form Steel (CFS) is the most often used substitute because of its high productivity and practicality in the field. Four different composite beams are examined in the proposed research with different ECs spacing. The beams’ top and bottom face plates are covered using CFS (1.6 mm). In addition to that, two different types of shear connectors are used. Two unique longitudinal spacing of 100 mm and 150 mm are also used for one with lipped ECs and without lipped ECs. Importantly, self-tapping screws are used to secure ECs in place between the top and bottom of the face plates. The effectiveness of the composite beams with various shear connector spacing subjected to a two-point load test is assessed through a series of experiments.

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Influence of seawater sea sand concrete environment on the long‐term tensile properties of pultruded basalt and basalt‐carbon‐hybrid fiber reinforced polymer profiles

Su,

Wang,

Ding

et al. 2023

Polymer Composites

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To reveal the durability of fiber‐reinforced polymer (FRP) profiles, which differ from FRP bars due to the clear variations in the internal structure of the fibers. This study experimentally investigated the tensile properties of FRP profiles in the seawater sea sand concrete (SSC) environment at 25, 45, and 60°C. Unidirectional basalt FRP profiles, multidirectional basalt FRP profiles, and basalt and carbon hybrid FRP profiles were considered. SEM analysis was performed to evaluate the corrosion mechanism. Results show that the strength degradation of FRP profiles accelerated with rising ambient temperature due to resin corrosion in hyperthermia. After 63 days of immersion in the SSC environment solution, multidirectional basalt FRP (BFRP) profiles exhibited more severe corrosion than unidirectional BFRP profiles (82.5% and 88.2%, respectively). The hybrid FRP profiles exhibited a strength retention of 86.4%, which was higher than that of multidirectional BFRP profiles due to the superior alkali resistance of carbon fibers compared to basalt fibers. In addition, prediction models of FRP profiles based on the Arrhenius relation were proposed with a high correlation coefficient of R2.Highlights Durability of FRP profiles in SSC environment was studied. Basalt and carbon fibers hybrid reinforced multidirectional polymer profiles. Corrosion mechanism of FRP profiles was revealed. Tensile property prediction model of FRPs in SSC environment was proposed.

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Seismic degradation behavior of steel-FRP composite bar reinforced concrete beams in marine environment based on experimental and numerical investigation

Cited by 12 publications

References 26 publications

Experimental Study on the Bond Performance between Glass-Fiber-Reinforced Polymer (GFRP) Bars and Concrete

Experimental Study on the Bond Performance between Glass-Fiber-Reinforced Polymer (GFRP) Bars and Concrete

Behaviour of Steel-Concrete-Steel Sandwich Beams with Novel Enhanced C-Channels

Influence of seawater sea sand concrete environment on the long‐term tensile properties of pultruded basalt and basalt‐carbon‐hybrid fiber reinforced polymer profiles

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