Mechanical Properties of Steel-FRP Composite Bars (SFCBs) and Performance of SFCB Reinforced Concrete Structures

Wu, Gang; Sun, Zeyang; Wu, Zhishen; Luo, Yunbiao

doi:10.1260/1369-4332.15.4.625

Cited by 67 publications

(18 citation statements)

References 13 publications

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“…The SFCB was produced by longitudinal basalt fibers along a centralized steel bar and can be applied to the concrete members with damage and recoverable ability [11] . Basalt fibers were provided by Zhejiang GBF Basalt Fiber Company, Limited (Hengdian, China) [12] and the FRP bars impregnated with vinyl-ester resin were produced by pultrusion technology.…”

Section: Tensile Property Testmentioning

confidence: 99%

Degradation of basalt FRP bars in alkaline environment

Wang

et al. 2014

Science and Engineering of Composite Materials

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This paper investigates the degradation of basalt fiber reinforced polymer (BFRP) bars used for concrete construction in an alkaline environment. The relationships between tensile strength, elastic modulus, shear strength and moisture absorption rate over time are analyzed using a tension test, short-beam test and moisture absorption weighting. The tensile strength degradation of BFRP bars was further compared with that of Glass FRP (GFRP) bars in the literature. The results indicated that BFRP bars exhibit relatively good resistance to alkaline corrosion, maintaining more than 60% of their original strength after 9 weeks at 55 ° C in an alkaline solution. The moisture absorption of BFRP bars conforms to Fick ' s law, which shows that the degradation mechanism is controlled by matrix and related interface degradation. This finding is supported by comparison with the shear strength degradation trend. Compared to GFRP bars under similar alkaline conditions, BFRP bars exhibit a similar degradation rate during the initial phase, but maintain higher tensile strength and strength retention over time.

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Section: Tensile Property Testmentioning

confidence: 99%

Degradation of basalt FRP bars in alkaline environment

Wang

et al. 2014

Science and Engineering of Composite Materials

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“…Second, the bond strength between SFCB and concrete is favorable and can be improved by modifying surface parameters. Whether the inner steel bar of the SFCB yielded before pulling out was determined by the FRP type, the steel/FRP ratio, the effective bond length and the concrete strength [3]. In earlier studies bond between the FRP reinforcement and concrete was achieved through the use of sand coating on the surface of the rebars [4] or through a secondary surface treatment of the rebars [1,5].…”

Section: Introductionmentioning

confidence: 99%

“…With the same favorable anti-corrosion capacity as FRP bar, SFCB has a smaller cost. By adjusting the steel/FRP ratio and FRP type in SFCB, good ductility can be assured [3]. This study evaluates the performance of hybrid bars in corrosion resistance, and the performance of hybrid rebar as a tension reinforcement in concrete beams under flexure loading.…”

Section: Introductionmentioning

confidence: 99%

Performance of hybrid bars in corrosion and flexure in concrete beams

Kamar

Debaiky

Mansour

2020

ERJ. Engineering Research Journal

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Corrosion of reinforcing steel is a serious problem worldwide; the problem of steel rebar corrosion leads to a reduction in the lifespan of the structure and adds to the maintenance costs. Many techniques have been developed in recent past to reduce corrosion but none of these solutions seem to be applicable as an adequate solution to the corrosion problem. Besides the use of Fiber Reinforced Polymer (FRP) rebar, hybrid rebar consisting of both FRP and steel are also being tried to control the problem of steel corrosion. This research evaluates the performance of hybrid rebar in corrosion resistance by inducing natural corrosion in a number of concrete cylinders with a hybrid rebar embedded symmetrically. The research also studies the performance of hybrid rebar as a tension reinforcement in concrete beams.

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“…For the purpose of achieving the seismic fortification goals of "reparable after a medium earthquake" and "collapse after a major earthquake", SFCB is considered to be the ideal replacement for steel bar in concrete members for structural design and application. Up to now, many experimental studies have been conducted on the mechanical performance of the SFCB [15] and concrete members reinforced with SFCB, including simply supported beams [16], columns [17], column-beam connections [18], and the bonding behavior of SFCB with concrete by pull-out performance [19]. To date, the material has been investigated primarily through experiments, while few effective numerical simulations have been conducted to study the seismic behaviors of the frame beam members [20].…”

Section: Introductionmentioning

confidence: 99%

Seismic Behaviors of Concrete Beams Reinforced with Steel-FRP Composite Bars under Quasi-Static Loading

Xiao

Qiu

2018

Applied Sciences

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Steel-fiber reinforced polymer (FRP) composite bar (SFCB) is a new composite material with good corrosion resistance and designable post-yield stiffness. Substitution of steel bar with SFCB can greatly increase the durability and ultimate capacity associated with seismic performance. First, the method and main results of the experiment are briefly introduced, then a simplified constitutive model of composite bar material was applied to simulate the seismic behaviors of the concrete beams reinforced with SFCBs by fiber element modeling. The simulation results were found to be in good agreement with test results, indicating that the finite element model is reasonable and accurate in simulating the seismic behaviors of beams reinforced with SFCB. Based on the numerical simulation method, a parametric study was then conducted. The main variable parameters were the FRP type in composite bars (i.e., basalt, carbon FRP and E-glass FRP), the concrete strength, basalt FRP (BFRP) content in SFCBs and shear span ratio. Seismic behaviors such as load-displacement pushover curves, seismic ultimate capacity and its corresponding drift ratio of the SFCBs reinforced concrete beams were also evaluated. The results showed that (1) the fiber type of the composite bar had a great impact on the mechanical properties of the beam, among which the beam reinforced with BFRP composite bar has higher seismic ultimate capacity and better ductility. With the increase of the fiber bundle in the composite bar, the post-yield stiffness and ultimate capacity of the component increase and the ductility is better; (2) at the pre-yield stage, concrete strength has little influence on the seismic performance of concrete beams while after yielding, the seismic ultimate capacity and post-yielding stiffness of specimens increased slowly with the increase in concrete strength, however, the ductility was reduced accordingly; (3) as the shear span ratio of beams increased from 3.5 to 5.5, the seismic ultimate capacity decreased gradually while the ultimate drift ratio increased by more than 50%. Through judicious setting of the fiber content and shear span ratio of the composite bar reinforced concrete beam, concrete beams reinforced with composite bars can have good ductility while maintaining high seismic ultimate capacity.

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Mechanical Properties of Steel-FRP Composite Bars (SFCBs) and Performance of SFCB Reinforced Concrete Structures

Cited by 67 publications

References 13 publications

Degradation of basalt FRP bars in alkaline environment

Degradation of basalt FRP bars in alkaline environment

Performance of hybrid bars in corrosion and flexure in concrete beams

Seismic Behaviors of Concrete Beams Reinforced with Steel-FRP Composite Bars under Quasi-Static Loading

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